359 lines
9.7 KiB
C
359 lines
9.7 KiB
C
/*
|
|
* linux/drivers/acorn/scsi/acornscsi.h
|
|
*
|
|
* Copyright (C) 1997 Russell King
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* Acorn SCSI driver
|
|
*/
|
|
#ifndef ACORNSCSI_H
|
|
#define ACORNSCSI_H
|
|
|
|
/* SBIC registers */
|
|
#define SBIC_OWNID 0
|
|
#define OWNID_FS1 (1<<7)
|
|
#define OWNID_FS2 (1<<6)
|
|
#define OWNID_EHP (1<<4)
|
|
#define OWNID_EAF (1<<3)
|
|
|
|
#define SBIC_CTRL 1
|
|
#define CTRL_DMAMODE (1<<7)
|
|
#define CTRL_DMADBAMODE (1<<6)
|
|
#define CTRL_DMABURST (1<<5)
|
|
#define CTRL_DMAPOLLED 0
|
|
#define CTRL_HHP (1<<4)
|
|
#define CTRL_EDI (1<<3)
|
|
#define CTRL_IDI (1<<2)
|
|
#define CTRL_HA (1<<1)
|
|
#define CTRL_HSP (1<<0)
|
|
|
|
#define SBIC_TIMEOUT 2
|
|
#define SBIC_TOTSECTS 3
|
|
#define SBIC_TOTHEADS 4
|
|
#define SBIC_TOTCYLH 5
|
|
#define SBIC_TOTCYLL 6
|
|
#define SBIC_LOGADDRH 7
|
|
#define SBIC_LOGADDRM2 8
|
|
#define SBIC_LOGADDRM1 9
|
|
#define SBIC_LOGADDRL 10
|
|
#define SBIC_SECTORNUM 11
|
|
#define SBIC_HEADNUM 12
|
|
#define SBIC_CYLH 13
|
|
#define SBIC_CYLL 14
|
|
#define SBIC_TARGETLUN 15
|
|
#define TARGETLUN_TLV (1<<7)
|
|
#define TARGETLUN_DOK (1<<6)
|
|
|
|
#define SBIC_CMNDPHASE 16
|
|
#define SBIC_SYNCHTRANSFER 17
|
|
#define SYNCHTRANSFER_OF0 0x00
|
|
#define SYNCHTRANSFER_OF1 0x01
|
|
#define SYNCHTRANSFER_OF2 0x02
|
|
#define SYNCHTRANSFER_OF3 0x03
|
|
#define SYNCHTRANSFER_OF4 0x04
|
|
#define SYNCHTRANSFER_OF5 0x05
|
|
#define SYNCHTRANSFER_OF6 0x06
|
|
#define SYNCHTRANSFER_OF7 0x07
|
|
#define SYNCHTRANSFER_OF8 0x08
|
|
#define SYNCHTRANSFER_OF9 0x09
|
|
#define SYNCHTRANSFER_OF10 0x0A
|
|
#define SYNCHTRANSFER_OF11 0x0B
|
|
#define SYNCHTRANSFER_OF12 0x0C
|
|
#define SYNCHTRANSFER_8DBA 0x00
|
|
#define SYNCHTRANSFER_2DBA 0x20
|
|
#define SYNCHTRANSFER_3DBA 0x30
|
|
#define SYNCHTRANSFER_4DBA 0x40
|
|
#define SYNCHTRANSFER_5DBA 0x50
|
|
#define SYNCHTRANSFER_6DBA 0x60
|
|
#define SYNCHTRANSFER_7DBA 0x70
|
|
|
|
#define SBIC_TRANSCNTH 18
|
|
#define SBIC_TRANSCNTM 19
|
|
#define SBIC_TRANSCNTL 20
|
|
#define SBIC_DESTID 21
|
|
#define DESTID_SCC (1<<7)
|
|
#define DESTID_DPD (1<<6)
|
|
|
|
#define SBIC_SOURCEID 22
|
|
#define SOURCEID_ER (1<<7)
|
|
#define SOURCEID_ES (1<<6)
|
|
#define SOURCEID_DSP (1<<5)
|
|
#define SOURCEID_SIV (1<<4)
|
|
|
|
#define SBIC_SSR 23
|
|
#define SBIC_CMND 24
|
|
#define CMND_RESET 0x00
|
|
#define CMND_ABORT 0x01
|
|
#define CMND_ASSERTATN 0x02
|
|
#define CMND_NEGATEACK 0x03
|
|
#define CMND_DISCONNECT 0x04
|
|
#define CMND_RESELECT 0x05
|
|
#define CMND_SELWITHATN 0x06
|
|
#define CMND_SELECT 0x07
|
|
#define CMND_SELECTATNTRANSFER 0x08
|
|
#define CMND_SELECTTRANSFER 0x09
|
|
#define CMND_RESELECTRXDATA 0x0A
|
|
#define CMND_RESELECTTXDATA 0x0B
|
|
#define CMND_WAITFORSELRECV 0x0C
|
|
#define CMND_SENDSTATCMD 0x0D
|
|
#define CMND_SENDDISCONNECT 0x0E
|
|
#define CMND_SETIDI 0x0F
|
|
#define CMND_RECEIVECMD 0x10
|
|
#define CMND_RECEIVEDTA 0x11
|
|
#define CMND_RECEIVEMSG 0x12
|
|
#define CMND_RECEIVEUSP 0x13
|
|
#define CMND_SENDCMD 0x14
|
|
#define CMND_SENDDATA 0x15
|
|
#define CMND_SENDMSG 0x16
|
|
#define CMND_SENDUSP 0x17
|
|
#define CMND_TRANSLATEADDR 0x18
|
|
#define CMND_XFERINFO 0x20
|
|
#define CMND_SBT (1<<7)
|
|
|
|
#define SBIC_DATA 25
|
|
#define SBIC_ASR 26
|
|
#define ASR_INT (1<<7)
|
|
#define ASR_LCI (1<<6)
|
|
#define ASR_BSY (1<<5)
|
|
#define ASR_CIP (1<<4)
|
|
#define ASR_PE (1<<1)
|
|
#define ASR_DBR (1<<0)
|
|
|
|
/* DMAC registers */
|
|
#define DMAC_INIT 0x00
|
|
#define INIT_8BIT (1)
|
|
|
|
#define DMAC_CHANNEL 0x80
|
|
#define CHANNEL_0 0x00
|
|
#define CHANNEL_1 0x01
|
|
#define CHANNEL_2 0x02
|
|
#define CHANNEL_3 0x03
|
|
|
|
#define DMAC_TXCNTLO 0x01
|
|
#define DMAC_TXCNTHI 0x81
|
|
#define DMAC_TXADRLO 0x02
|
|
#define DMAC_TXADRMD 0x82
|
|
#define DMAC_TXADRHI 0x03
|
|
|
|
#define DMAC_DEVCON0 0x04
|
|
#define DEVCON0_AKL (1<<7)
|
|
#define DEVCON0_RQL (1<<6)
|
|
#define DEVCON0_EXW (1<<5)
|
|
#define DEVCON0_ROT (1<<4)
|
|
#define DEVCON0_CMP (1<<3)
|
|
#define DEVCON0_DDMA (1<<2)
|
|
#define DEVCON0_AHLD (1<<1)
|
|
#define DEVCON0_MTM (1<<0)
|
|
|
|
#define DMAC_DEVCON1 0x84
|
|
#define DEVCON1_WEV (1<<1)
|
|
#define DEVCON1_BHLD (1<<0)
|
|
|
|
#define DMAC_MODECON 0x05
|
|
#define MODECON_WOED 0x01
|
|
#define MODECON_VERIFY 0x00
|
|
#define MODECON_READ 0x04
|
|
#define MODECON_WRITE 0x08
|
|
#define MODECON_AUTOINIT 0x10
|
|
#define MODECON_ADDRDIR 0x20
|
|
#define MODECON_DEMAND 0x00
|
|
#define MODECON_SINGLE 0x40
|
|
#define MODECON_BLOCK 0x80
|
|
#define MODECON_CASCADE 0xC0
|
|
|
|
#define DMAC_STATUS 0x85
|
|
#define STATUS_TC0 (1<<0)
|
|
#define STATUS_RQ0 (1<<4)
|
|
|
|
#define DMAC_TEMPLO 0x06
|
|
#define DMAC_TEMPHI 0x86
|
|
#define DMAC_REQREG 0x07
|
|
#define DMAC_MASKREG 0x87
|
|
#define MASKREG_M0 0x01
|
|
#define MASKREG_M1 0x02
|
|
#define MASKREG_M2 0x04
|
|
#define MASKREG_M3 0x08
|
|
|
|
/* miscellaneous internal variables */
|
|
|
|
#define POD_SPACE(x) ((x) + 0xd0000)
|
|
#define MASK_ON (MASKREG_M3|MASKREG_M2|MASKREG_M1|MASKREG_M0)
|
|
#define MASK_OFF (MASKREG_M3|MASKREG_M2|MASKREG_M1)
|
|
|
|
/*
|
|
* SCSI driver phases
|
|
*/
|
|
typedef enum {
|
|
PHASE_IDLE, /* we're not planning on doing anything */
|
|
PHASE_CONNECTING, /* connecting to a target */
|
|
PHASE_CONNECTED, /* connected to a target */
|
|
PHASE_MSGOUT, /* message out to device */
|
|
PHASE_RECONNECTED, /* reconnected */
|
|
PHASE_COMMANDPAUSED, /* command partly sent */
|
|
PHASE_COMMAND, /* command all sent */
|
|
PHASE_DATAOUT, /* data out to device */
|
|
PHASE_DATAIN, /* data in from device */
|
|
PHASE_STATUSIN, /* status in from device */
|
|
PHASE_MSGIN, /* message in from device */
|
|
PHASE_DONE, /* finished */
|
|
PHASE_ABORTED, /* aborted */
|
|
PHASE_DISCONNECT, /* disconnecting */
|
|
} phase_t;
|
|
|
|
/*
|
|
* After interrupt, what to do now
|
|
*/
|
|
typedef enum {
|
|
INTR_IDLE, /* not expecting another IRQ */
|
|
INTR_NEXT_COMMAND, /* start next command */
|
|
INTR_PROCESSING, /* interrupt routine still processing */
|
|
} intr_ret_t;
|
|
|
|
/*
|
|
* DMA direction
|
|
*/
|
|
typedef enum {
|
|
DMA_OUT, /* DMA from memory to chip */
|
|
DMA_IN /* DMA from chip to memory */
|
|
} dmadir_t;
|
|
|
|
/*
|
|
* Synchronous transfer state
|
|
*/
|
|
typedef enum { /* Synchronous transfer state */
|
|
SYNC_ASYNCHRONOUS, /* don't negociate synchronous transfers*/
|
|
SYNC_NEGOCIATE, /* start negociation */
|
|
SYNC_SENT_REQUEST, /* sent SDTR message */
|
|
SYNC_COMPLETED, /* received SDTR reply */
|
|
} syncxfer_t;
|
|
|
|
/*
|
|
* Command type
|
|
*/
|
|
typedef enum { /* command type */
|
|
CMD_READ, /* READ_6, READ_10, READ_12 */
|
|
CMD_WRITE, /* WRITE_6, WRITE_10, WRITE_12 */
|
|
CMD_MISC, /* Others */
|
|
} cmdtype_t;
|
|
|
|
/*
|
|
* Data phase direction
|
|
*/
|
|
typedef enum { /* Data direction */
|
|
DATADIR_IN, /* Data in phase expected */
|
|
DATADIR_OUT /* Data out phase expected */
|
|
} datadir_t;
|
|
|
|
#include "queue.h"
|
|
#include "msgqueue.h"
|
|
|
|
#define STATUS_BUFFER_SIZE 32
|
|
/*
|
|
* This is used to dump the previous states of the SBIC
|
|
*/
|
|
struct status_entry {
|
|
unsigned long when;
|
|
unsigned char ssr;
|
|
unsigned char ph;
|
|
unsigned char irq;
|
|
unsigned char unused;
|
|
};
|
|
|
|
#define ADD_STATUS(_q,_ssr,_ph,_irq) \
|
|
({ \
|
|
host->status[(_q)][host->status_ptr[(_q)]].when = jiffies; \
|
|
host->status[(_q)][host->status_ptr[(_q)]].ssr = (_ssr); \
|
|
host->status[(_q)][host->status_ptr[(_q)]].ph = (_ph); \
|
|
host->status[(_q)][host->status_ptr[(_q)]].irq = (_irq); \
|
|
host->status_ptr[(_q)] = (host->status_ptr[(_q)] + 1) & (STATUS_BUFFER_SIZE - 1); \
|
|
})
|
|
|
|
/*
|
|
* AcornSCSI host specific data
|
|
*/
|
|
typedef struct acornscsi_hostdata {
|
|
/* miscellaneous */
|
|
struct Scsi_Host *host; /* host */
|
|
Scsi_Cmnd *SCpnt; /* currently processing command */
|
|
Scsi_Cmnd *origSCpnt; /* original connecting command */
|
|
|
|
/* driver information */
|
|
struct {
|
|
unsigned int io_port; /* base address of WD33C93 */
|
|
unsigned int irq; /* interrupt */
|
|
phase_t phase; /* current phase */
|
|
|
|
struct {
|
|
unsigned char target; /* reconnected target */
|
|
unsigned char lun; /* reconnected lun */
|
|
unsigned char tag; /* reconnected tag */
|
|
} reconnected;
|
|
|
|
struct scsi_pointer SCp; /* current commands data pointer */
|
|
|
|
MsgQueue_t msgs;
|
|
|
|
unsigned short last_message; /* last message to be sent */
|
|
unsigned char disconnectable:1; /* this command can be disconnected */
|
|
} scsi;
|
|
|
|
/* statistics information */
|
|
struct {
|
|
unsigned int queues;
|
|
unsigned int removes;
|
|
unsigned int fins;
|
|
unsigned int reads;
|
|
unsigned int writes;
|
|
unsigned int miscs;
|
|
unsigned int disconnects;
|
|
unsigned int aborts;
|
|
unsigned int resets;
|
|
} stats;
|
|
|
|
/* queue handling */
|
|
struct {
|
|
Queue_t issue; /* issue queue */
|
|
Queue_t disconnected; /* disconnected command queue */
|
|
} queues;
|
|
|
|
/* per-device info */
|
|
struct {
|
|
unsigned char sync_xfer; /* synchronous transfer (SBIC value) */
|
|
syncxfer_t sync_state; /* sync xfer negociation state */
|
|
unsigned char disconnect_ok:1; /* device can disconnect */
|
|
} device[8];
|
|
unsigned long busyluns[64 / sizeof(unsigned long)];/* array of bits indicating LUNs busy */
|
|
|
|
/* DMA info */
|
|
struct {
|
|
unsigned int io_port; /* base address of DMA controller */
|
|
unsigned int io_intr_clear; /* address of DMA interrupt clear */
|
|
unsigned int free_addr; /* next free address */
|
|
unsigned int start_addr; /* start address of current transfer */
|
|
dmadir_t direction; /* dma direction */
|
|
unsigned int transferred; /* number of bytes transferred */
|
|
unsigned int xfer_start; /* scheduled DMA transfer start */
|
|
unsigned int xfer_length; /* scheduled DMA transfer length */
|
|
char *xfer_ptr; /* pointer to area */
|
|
unsigned char xfer_required:1; /* set if we need to transfer something */
|
|
unsigned char xfer_setup:1; /* set if DMA is setup */
|
|
unsigned char xfer_done:1; /* set if DMA reached end of BH list */
|
|
} dma;
|
|
|
|
/* card info */
|
|
struct {
|
|
unsigned int io_intr; /* base address of interrupt id reg */
|
|
unsigned int io_page; /* base address of page reg */
|
|
unsigned int io_ram; /* base address of RAM access */
|
|
unsigned char page_reg; /* current setting of page reg */
|
|
} card;
|
|
|
|
unsigned char status_ptr[9];
|
|
struct status_entry status[9][STATUS_BUFFER_SIZE];
|
|
} AS_Host;
|
|
|
|
#endif /* ACORNSCSI_H */
|