fas216.h
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上传日期:2013-04-10
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- /*
- * linux/drivers/acorn/scsi/fas216.h
- *
- * Copyright (C) 1997-2000 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.
- *
- * FAS216 generic driver
- */
- #ifndef FAS216_H
- #define FAS216_H
- #ifndef NO_IRQ
- #define NO_IRQ 255
- #endif
- #include "queue.h"
- #include "msgqueue.h"
- /* FAS register definitions */
- /* transfer count low */
- #define REG_CTCL(x) ((x)->scsi.io_port)
- #define REG_STCL(x) ((x)->scsi.io_port)
- /* transfer count medium */
- #define REG_CTCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
- #define REG_STCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
- /* fifo data */
- #define REG_FF(x) ((x)->scsi.io_port + (2 << (x)->scsi.io_shift))
- /* command */
- #define REG_CMD(x) ((x)->scsi.io_port + (3 << (x)->scsi.io_shift))
- #define CMD_NOP 0x00
- #define CMD_FLUSHFIFO 0x01
- #define CMD_RESETCHIP 0x02
- #define CMD_RESETSCSI 0x03
- #define CMD_TRANSFERINFO 0x10
- #define CMD_INITCMDCOMPLETE 0x11
- #define CMD_MSGACCEPTED 0x12
- #define CMD_PADBYTES 0x18
- #define CMD_SETATN 0x1a
- #define CMD_RSETATN 0x1b
- #define CMD_SELECTWOATN 0x41
- #define CMD_SELECTATN 0x42
- #define CMD_SELECTATNSTOP 0x43
- #define CMD_ENABLESEL 0x44
- #define CMD_DISABLESEL 0x45
- #define CMD_SELECTATN3 0x46
- #define CMD_RESEL3 0x47
- #define CMD_WITHDMA 0x80
- /* status register (read) */
- #define REG_STAT(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
- #define STAT_IO (1 << 0) /* IO phase */
- #define STAT_CD (1 << 1) /* CD phase */
- #define STAT_MSG (1 << 2) /* MSG phase */
- #define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */
- #define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */
- #define STAT_PARITYERROR (1 << 5) /* Parity error */
- #define STAT_REALBAD (1 << 6) /* Something bad */
- #define STAT_INT (1 << 7) /* Interrupt */
- #define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO)
- #define STAT_DATAOUT (0) /* Data out */
- #define STAT_DATAIN (STAT_IO) /* Data in */
- #define STAT_COMMAND (STAT_CD) /* Command out */
- #define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */
- #define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */
- #define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */
- /* bus ID for select / reselect */
- #define REG_SDID(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
- #define BUSID(target) ((target) & 7)
- /* Interrupt status register (read) */
- #define REG_INST(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
- #define INST_SELWOATN (1 << 0) /* Select w/o ATN */
- #define INST_SELATN (1 << 1) /* Select w/ATN */
- #define INST_RESELECTED (1 << 2) /* Reselected */
- #define INST_FUNCDONE (1 << 3) /* Function done */
- #define INST_BUSSERVICE (1 << 4) /* Bus service */
- #define INST_DISCONNECT (1 << 5) /* Disconnect */
- #define INST_ILLEGALCMD (1 << 6) /* Illegal command */
- #define INST_BUSRESET (1 << 7) /* SCSI Bus reset */
- /* Timeout register (write) */
- #define REG_STIM(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
- /* Sequence step register (read) */
- #define REG_IS(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
- #define IS_BITS 0x07
- #define IS_SELARB 0x00 /* Select & Arb ok */
- #define IS_MSGBYTESENT 0x01 /* One byte message sent*/
- #define IS_NOTCOMMAND 0x02 /* Not in command state */
- #define IS_EARLYPHASE 0x03 /* Early phase change */
- #define IS_COMPLETE 0x04 /* Command ok */
- #define IS_SOF 0x08 /* Sync off flag */
- /* Transfer period step (write) */
- #define REG_STP(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
- /* Synchronous Offset (write) */
- #define REG_SOF(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
- /* Fifo state register (read) */
- #define REG_CFIS(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
- #define CFIS_CF 0x1f /* Num bytes in FIFO */
- #define CFIS_IS 0xe0 /* Step */
- /* config register 1 */
- #define REG_CNTL1(x) ((x)->scsi.io_port + (8 << (x)->scsi.io_shift))
- #define CNTL1_CID (7 << 0) /* Chip ID */
- #define CNTL1_STE (1 << 3) /* Self test enable */
- #define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */
- #define CNTL1_PTE (1 << 5) /* Parity test enable */
- #define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */
- #define CNTL1_ETM (1 << 7) /* Extended Timing Mode */
- /* Clock conversion factor (read) */
- #define REG_CLKF(x) ((x)->scsi.io_port + (9 << (x)->scsi.io_shift))
- #define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */
- #define CLKF_F10MHZ 0x02 /* 10 MHz */
- #define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */
- #define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */
- #define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */
- #define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */
- #define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */
- /* Chip test register (write) */
- #define REG0_FTM(x) ((x)->scsi.io_port + (10 << (x)->scsi.io_shift))
- #define TEST_FTM 0x01 /* Force target mode */
- #define TEST_FIM 0x02 /* Force initiator mode */
- #define TEST_FHI 0x04 /* Force high impedance mode */
- /* Configuration register 2 (read/write) */
- #define REG_CNTL2(x) ((x)->scsi.io_port + (11 << (x)->scsi.io_shift))
- #define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */
- #define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */
- #define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */
- #define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */
- #define CNTL2_TSDR (1 << 4) /* Tristate DREQ */
- #define CNTL2_SBO (1 << 5) /* Select Byte Order */
- #define CNTL2_ENF (1 << 6) /* Enable features */
- #define CNTL2_DAE (1 << 7) /* Data Alignment Enable */
- /* Configuration register 3 (read/write) */
- #define REG_CNTL3(x) ((x)->scsi.io_port + (12 << (x)->scsi.io_shift))
- #define CNTL3_BS8 (1 << 0) /* Burst size 8 */
- #define CNTL3_MDM (1 << 1) /* Modify DMA mode */
- #define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */
- #define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */
- #define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */
- #define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */
- #define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */
- #define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */
- /* High transfer count (read/write) */
- #define REG_CTCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
- #define REG_STCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
- /* ID reigster (read only) */
- #define REG1_ID(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
- /* Data alignment */
- #define REG0_DAL(x) ((x)->scsi.io_port + (15 << (x)->scsi.io_shift))
- typedef enum {
- PHASE_IDLE, /* we're not planning on doing anything */
- PHASE_SELECTION, /* selecting a device */
- PHASE_SELSTEPS, /* selection with command steps */
- PHASE_COMMAND, /* command sent */
- PHASE_MESSAGESENT, /* selected, and we're sending cmd */
- PHASE_RECONNECTED, /* reconnected */
- PHASE_DATAOUT, /* data out to device */
- PHASE_DATAIN, /* data in from device */
- PHASE_MSGIN, /* message in from device */
- PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */
- PHASE_MSGOUT, /* after message out phase */
- PHASE_MSGOUT_EXPECT, /* expecting message out */
- PHASE_STATUS, /* status from device */
- PHASE_DONE /* Command complete */
- } phase_t;
- typedef enum {
- DMA_OUT, /* DMA from memory to chip */
- DMA_IN /* DMA from chip to memory */
- } fasdmadir_t;
- typedef enum {
- fasdma_none, /* No dma */
- fasdma_pio, /* PIO mode */
- fasdma_pseudo, /* Pseudo DMA */
- fasdma_real_block, /* Real DMA, on block by block basis */
- fasdma_real_all /* Real DMA, on request by request */
- } fasdmatype_t;
- typedef enum {
- neg_wait, /* Negociate with device */
- neg_inprogress, /* Negociation sent */
- neg_complete, /* Negociation complete */
- neg_targcomplete, /* Target completed negociation */
- neg_invalid /* Negociation not supported */
- } neg_t;
- #define MAGIC 0x441296bdUL
- #define NR_MSGS 8
- typedef struct {
- unsigned long magic_start;
- struct Scsi_Host *host; /* host */
- Scsi_Cmnd *SCpnt; /* currently processing command */
- Scsi_Cmnd *origSCpnt; /* original connecting command */
- Scsi_Cmnd *reqSCpnt; /* request sense command */
- /* driver information */
- struct {
- unsigned int io_port; /* base address of FAS216 */
- unsigned int io_shift; /* shift to adjust reg offsets by */
- unsigned int irq; /* interrupt */
- unsigned char cfg[4]; /* configuration registers */
- const char *type; /* chip type */
- phase_t phase; /* current phase */
- struct {
- unsigned char target; /* reconnected target */
- unsigned char lun; /* reconnected lun */
- unsigned char tag; /* reconnected tag */
- } reconnected;
- Scsi_Pointer SCp; /* current commands data pointer */
- MsgQueue_t msgs; /* message queue for connected device */
- unsigned int async_stp; /* Async transfer STP value */
- unsigned char msgin_fifo; /* bytes in fifo at time of message in */
- unsigned char message[256]; /* last message received from device */
- unsigned int msglen; /* length of last message received */
- unsigned char disconnectable:1; /* this command can be disconnected */
- unsigned char aborting:1; /* aborting command */
- } 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 bus_resets;
- unsigned int host_resets;
- } stats;
- /* configuration information */
- struct {
- unsigned char clockrate; /* clock rate of FAS device (MHz) */
- unsigned char select_timeout; /* timeout (R5) */
- unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
- unsigned char wide_max_size; /* Maximum wide transfer size */
- unsigned char cntl3; /* Control Reg 3 */
- unsigned int asyncperiod; /* Async transfer period (ns) */
- unsigned int disconnect_ok:1; /* Disconnects allowed? */
- } ifcfg;
- /* queue handling */
- struct {
- Queue_t issue; /* issue queue */
- Queue_t disconnected; /* disconnected command queue */
- } queues;
- /* per-device info */
- struct fas216_device {
- unsigned char disconnect_ok:1; /* device can disconnect */
- unsigned char period; /* sync xfer period in (*4ns) */
- unsigned char stp; /* synchronous transfer period */
- unsigned char sof; /* synchronous offset register */
- unsigned char wide_xfer; /* currently negociated wide transfer */
- neg_t sync_state; /* synchronous transfer mode */
- neg_t wide_state; /* wide transfer mode */
- } device[8];
- unsigned char busyluns[8]; /* array of bits indicating LUNs busy */
- /* dma */
- struct {
- fasdmatype_t transfer_type; /* current type of DMA transfer */
- fasdmatype_t (*setup) (struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
- void (*pseudo)(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, int transfer);
- void (*stop) (struct Scsi_Host *host, Scsi_Pointer *SCp);
- } dma;
- /* miscellaneous */
- int internal_done; /* flag to indicate request done */
- unsigned long magic_end;
- } FAS216_Info;
- /* Function: int fas216_init (struct Scsi_Host *instance)
- * Purpose : initialise FAS/NCR/AMD SCSI ic.
- * Params : instance - a driver-specific filled-out structure
- * Returns : 0 on success
- */
- extern int fas216_init (struct Scsi_Host *instance);
- /* Function: int fas216_abort (Scsi_Cmnd *SCpnt)
- * Purpose : abort a command if something horrible happens.
- * Params : SCpnt - Command that is believed to be causing a problem.
- * Returns : one of SCSI_ABORT_ macros.
- */
- extern int fas216_abort (Scsi_Cmnd *);
- /* Function: int fas216_reset (Scsi_Cmnd *SCpnt, unsigned int reset_flags)
- * Purpose : resets the adapter if something horrible happens.
- * Params : SCpnt - Command that is believed to be causing a problem.
- * reset_flags - flags indicating reset type that is believed to be required.
- * Returns : one of SCSI_RESET_ macros, or'd with the SCSI_RESET_*_RESET macros.
- */
- extern int fas216_reset (Scsi_Cmnd *, unsigned int);
- /* Function: int fas216_queue_command (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
- * Purpose : queue a command for adapter to process.
- * Params : SCpnt - Command to queue
- * done - done function to call once command is complete
- * Returns : 0 - success, else error
- */
- extern int fas216_queue_command (Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
- /* Function: int fas216_command (Scsi_Cmnd *SCpnt)
- * Purpose : queue a command for adapter to process.
- * Params : SCpnt - Command to queue
- * Returns : scsi result code
- */
- extern int fas216_command (Scsi_Cmnd *);
- /* Function: void fas216_intr (struct Scsi_Host *instance)
- * Purpose : handle interrupts from the interface to progress a command
- * Params : instance - interface to service
- */
- extern void fas216_intr (struct Scsi_Host *instance);
- /* Function: int fas216_release (struct Scsi_Host *instance)
- * Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
- * Params : instance - a driver-specific filled-out structure
- * Returns : 0 on success
- */
- extern int fas216_release (struct Scsi_Host *instance);
- extern int fas216_info(FAS216_Info *info, char *buffer);
- extern int fas216_print_host(FAS216_Info *info, char *buffer);
- extern int fas216_print_stats(FAS216_Info *info, char *buffer);
- extern int fas216_print_device(FAS216_Info *info, Scsi_Device *scd, char *buffer);
- /* Function: int fas216_eh_abort(Scsi_Cmnd *SCpnt)
- * Purpose : abort this command
- * Params : SCpnt - command to abort
- * Returns : FAILED if unable to abort
- */
- extern int fas216_eh_abort(Scsi_Cmnd *SCpnt);
- /* Function: int fas216_eh_device_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the device associated with this command
- * Params : SCpnt - command specifing device to reset
- * Returns : FAILED if unable to reset
- */
- extern int fas216_eh_device_reset(Scsi_Cmnd *SCpnt);
- /* Function: int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the complete bus associated with this command
- * Params : SCpnt - command specifing bus to reset
- * Returns : FAILED if unable to reset
- */
- extern int fas216_eh_bus_reset(Scsi_Cmnd *SCpnt);
- /* Function: int fas216_eh_host_reset(Scsi_Cmnd *SCpnt)
- * Purpose : Reset the host associated with this command
- * Params : SCpnt - command specifing host to reset
- * Returns : FAILED if unable to reset
- */
- extern int fas216_eh_host_reset(Scsi_Cmnd *SCpnt);
- #endif /* FAS216_H */