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1622 |
jcastillo |
/*
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* FAS216 generic driver
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*
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* Copyright (C) 1997-1998 Russell King
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*
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* NOTE! This file should be viewed using a console with
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* >100 character width (since it uses 8-space tabs)
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* (it used to fit in 80-columns with 4 space)
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*/
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#ifndef FAS216_H
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#define FAS216_H
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#ifndef NO_IRQ
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#define NO_IRQ 255
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#endif
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#include "queue.h"
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#include "msgqueue.h"
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/* FAS register definitions */
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/* transfer count low */
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#define REG_CTCL(x) ((x)->scsi.io_port)
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#define REG_STCL(x) ((x)->scsi.io_port)
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/* transfer count medium */
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#define REG_CTCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
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#define REG_STCM(x) ((x)->scsi.io_port + (1 << (x)->scsi.io_shift))
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/* fifo data */
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#define REG_FF(x) ((x)->scsi.io_port + (2 << (x)->scsi.io_shift))
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/* command */
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#define REG_CMD(x) ((x)->scsi.io_port + (3 << (x)->scsi.io_shift))
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#define CMD_NOP 0x00
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#define CMD_FLUSHFIFO 0x01
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#define CMD_RESETCHIP 0x02
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#define CMD_RESETSCSI 0x03
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#define CMD_TRANSFERINFO 0x10
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#define CMD_INITCMDCOMPLETE 0x11
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#define CMD_MSGACCEPTED 0x12
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#define CMD_PADBYTES 0x18
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#define CMD_SETATN 0x1a
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#define CMD_RSETATN 0x1b
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#define CMD_SELECTWOATN 0x41
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#define CMD_SELECTATN 0x42
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#define CMD_SELECTATNSTOP 0x43
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#define CMD_ENABLESEL 0x44
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#define CMD_DISABLESEL 0x45
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#define CMD_SELECTATN3 0x46
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#define CMD_RESEL3 0x47
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#define CMD_WITHDMA 0x80
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/* status register (read) */
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#define REG_STAT(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
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#define STAT_IO (1 << 0) /* IO phase */
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#define STAT_CD (1 << 1) /* CD phase */
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#define STAT_MSG (1 << 2) /* MSG phase */
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#define STAT_TRANSFERDONE (1 << 3) /* Transfer completed */
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#define STAT_TRANSFERCNTZ (1 << 4) /* Transfer counter is zero */
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#define STAT_PARITYERROR (1 << 5) /* Parity error */
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#define STAT_REALBAD (1 << 6) /* Something bad */
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#define STAT_INT (1 << 7) /* Interrupt */
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#define STAT_BUSMASK (STAT_MSG|STAT_CD|STAT_IO)
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#define STAT_DATAOUT (0) /* Data out */
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#define STAT_DATAIN (STAT_IO) /* Data in */
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#define STAT_COMMAND (STAT_CD) /* Command out */
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#define STAT_STATUS (STAT_CD|STAT_IO) /* Status In */
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#define STAT_MESGOUT (STAT_MSG|STAT_CD) /* Message out */
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#define STAT_MESGIN (STAT_MSG|STAT_CD|STAT_IO) /* Message In */
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/* bus ID for select / reselect */
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#define REG_SDID(x) ((x)->scsi.io_port + (4 << (x)->scsi.io_shift))
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#define BUSID(target) ((target) & 7)
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/* Interrupt status register (read) */
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#define REG_INST(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
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#define INST_SELWOATN (1 << 0) /* Select w/o ATN */
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#define INST_SELATN (1 << 1) /* Select w/ATN */
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#define INST_RESELECTED (1 << 2) /* Reselected */
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#define INST_FUNCDONE (1 << 3) /* Function done */
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#define INST_BUSSERVICE (1 << 4) /* Bus service */
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#define INST_DISCONNECT (1 << 5) /* Disconnect */
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#define INST_ILLEGALCMD (1 << 6) /* Illegal command */
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#define INST_BUSRESET (1 << 7) /* SCSI Bus reset */
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/* Timeout register (write) */
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#define REG_STIM(x) ((x)->scsi.io_port + (5 << (x)->scsi.io_shift))
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/* Sequence step register (read) */
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#define REG_IS(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
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#define IS_BITS 0x07
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#define IS_SELARB 0x00 /* Select & Arb ok */
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#define IS_MSGBYTESENT 0x01 /* One byte message sent*/
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#define IS_NOTCOMMAND 0x02 /* Not in command state */
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#define IS_EARLYPHASE 0x03 /* Early phase change */
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#define IS_COMPLETE 0x04 /* Command ok */
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#define IS_SOF 0x08 /* Sync off flag */
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/* Transfer period step (write) */
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#define REG_STP(x) ((x)->scsi.io_port + (6 << (x)->scsi.io_shift))
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/* Synchronous Offset (write) */
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#define REG_SOF(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
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/* Fifo state register (read) */
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#define REG_CFIS(x) ((x)->scsi.io_port + (7 << (x)->scsi.io_shift))
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#define CFIS_CF 0x1f /* Num bytes in FIFO */
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#define CFIS_IS 0xe0 /* Step */
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/* config register 1 */
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#define REG_CNTL1(x) ((x)->scsi.io_port + (8 << (x)->scsi.io_shift))
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#define CNTL1_CID (7 << 0) /* Chip ID */
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#define CNTL1_STE (1 << 3) /* Self test enable */
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#define CNTL1_PERE (1 << 4) /* Parity enable reporting en. */
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#define CNTL1_PTE (1 << 5) /* Parity test enable */
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#define CNTL1_DISR (1 << 6) /* Disable Irq on SCSI reset */
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#define CNTL1_ETM (1 << 7) /* Extended Timing Mode */
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/* Clock conversion factor (read) */
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#define REG_CLKF(x) ((x)->scsi.io_port + (9 << (x)->scsi.io_shift))
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#define CLKF_F37MHZ 0x00 /* 35.01 - 40 MHz */
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#define CLKF_F10MHZ 0x02 /* 10 MHz */
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#define CLKF_F12MHZ 0x03 /* 10.01 - 15 MHz */
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#define CLKF_F17MHZ 0x04 /* 15.01 - 20 MHz */
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#define CLKF_F22MHZ 0x05 /* 20.01 - 25 MHz */
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#define CLKF_F27MHZ 0x06 /* 25.01 - 30 MHz */
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#define CLKF_F32MHZ 0x07 /* 30.01 - 35 MHz */
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/* Chip test register (write) */
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#define REG0_FTM(x) ((x)->scsi.io_port + (10 << (x)->scsi.io_shift))
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#define TEST_FTM 0x01 /* Force target mode */
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#define TEST_FIM 0x02 /* Force initiator mode */
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#define TEST_FHI 0x04 /* Force high impedance mode */
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/* Configuration register 2 (read/write) */
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#define REG_CNTL2(x) ((x)->scsi.io_port + (11 << (x)->scsi.io_shift))
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#define CNTL2_PGDP (1 << 0) /* Pass Th/Generate Data Parity */
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#define CNTL2_PGRP (1 << 1) /* Pass Th/Generate Reg Parity */
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#define CNTL2_ACDPE (1 << 2) /* Abort on Cmd/Data Parity Err */
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#define CNTL2_S2FE (1 << 3) /* SCSI2 Features Enable */
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#define CNTL2_TSDR (1 << 4) /* Tristate DREQ */
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#define CNTL2_SBO (1 << 5) /* Select Byte Order */
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#define CNTL2_ENF (1 << 6) /* Enable features */
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#define CNTL2_DAE (1 << 7) /* Data Alignment Enable */
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/* Configuration register 3 (read/write) */
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#define REG_CNTL3(x) ((x)->scsi.io_port + (12 << (x)->scsi.io_shift))
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#define CNTL3_BS8 (1 << 0) /* Burst size 8 */
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#define CNTL3_MDM (1 << 1) /* Modify DMA mode */
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#define CNTL3_LBTM (1 << 2) /* Last Byte Transfer mode */
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#define CNTL3_FASTCLK (1 << 3) /* Fast SCSI clocking */
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#define CNTL3_FASTSCSI (1 << 4) /* Fast SCSI */
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#define CNTL3_G2CB (1 << 5) /* Group2 SCSI support */
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#define CNTL3_QTAG (1 << 6) /* Enable 3 byte msgs */
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#define CNTL3_ADIDCHK (1 << 7) /* Additional ID check */
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/* High transfer count (read/write) */
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#define REG_CTCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
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#define REG_STCH(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
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/* ID reigster (read only) */
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#define REG1_ID(x) ((x)->scsi.io_port + (14 << (x)->scsi.io_shift))
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/* Data alignment */
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#define REG0_DAL(x) ((x)->scsi.io_port + (15 << (x)->scsi.io_shift))
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typedef enum {
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PHASE_IDLE, /* we're not planning on doing anything */
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PHASE_SELECTION, /* selecting a device */
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PHASE_SELSTEPS, /* selection with command steps */
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PHASE_COMMAND, /* command sent */
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PHASE_MESSAGESENT, /* selected, and we're sending cmd */
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PHASE_RECONNECTED, /* reconnected */
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PHASE_DATAOUT, /* data out to device */
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PHASE_DATAIN, /* data in from device */
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PHASE_MSGIN, /* message in from device */
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PHASE_MSGIN_DISCONNECT, /* disconnecting from bus */
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PHASE_MSGOUT, /* after message out phase */
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PHASE_MSGOUT_EXPECT, /* expecting message out */
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PHASE_STATUS, /* status from device */
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PHASE_DONE /* Command complete */
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} phase_t;
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typedef enum {
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DMA_OUT, /* DMA from memory to chip */
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DMA_IN /* DMA from chip to memory */
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} fasdmadir_t;
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typedef enum {
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fasdma_none, /* No dma */
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fasdma_pio, /* PIO mode */
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fasdma_pseudo, /* Pseudo DMA */
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fasdma_real_block, /* Real DMA, on block by block basis */
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fasdma_real_all /* Real DMA, on request by request */
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} fasdmatype_t;
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typedef enum {
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neg_wait, /* Negociate with device */
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neg_inprogress, /* Negociation sent */
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neg_complete, /* Negociation complete */
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neg_targcomplete, /* Target completed negociation */
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neg_invalid /* Negociation not supported */
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} neg_t;
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#define MAGIC 0x441296bdUL
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#define NR_MSGS 8
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typedef struct {
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unsigned long magic_start;
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struct Scsi_Host *host; /* host */
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Scsi_Cmnd *SCpnt; /* currently processing command */
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Scsi_Cmnd *origSCpnt; /* original connecting command */
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/* driver information */
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struct {
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unsigned int io_port; /* base address of FAS216 */
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unsigned int io_shift; /* shift to adjust reg offsets by */
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unsigned int irq; /* interrupt */
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unsigned char cfg[4]; /* configuration registers */
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const char *type; /* chip type */
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phase_t phase; /* current phase */
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struct {
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unsigned char target; /* reconnected target */
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unsigned char lun; /* reconnected lun */
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unsigned char tag; /* reconnected tag */
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} reconnected;
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Scsi_Pointer SCp; /* current commands data pointer */
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MsgQueue_t msgs; /* message queue for connected device */
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unsigned int async_stp; /* Async transfer STP value */
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unsigned char msgin_fifo; /* bytes in fifo at time of message in */
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unsigned char disconnectable:1; /* this command can be disconnected */
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unsigned char aborting:1; /* aborting command */
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} scsi;
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| 245 |
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/* statistics information */
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struct {
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unsigned int queues;
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unsigned int removes;
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| 249 |
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unsigned int fins;
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| 250 |
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unsigned int reads;
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| 251 |
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unsigned int writes;
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| 252 |
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unsigned int miscs;
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| 253 |
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unsigned int disconnects;
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| 254 |
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unsigned int aborts;
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| 255 |
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unsigned int resets;
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| 256 |
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} stats;
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| 257 |
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| 258 |
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/* configuration information */
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| 259 |
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struct {
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unsigned char clockrate; /* clock rate of FAS device (MHz) */
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| 261 |
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unsigned char select_timeout; /* timeout (R5) */
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| 262 |
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unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
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| 263 |
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unsigned char wide_max_size; /* Maximum wide transfer size */
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| 264 |
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unsigned char cntl3; /* Control Reg 3 */
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| 265 |
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unsigned int asyncperiod; /* Async transfer period (ns) */
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| 266 |
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unsigned int disconnect_ok; /* Disconnect OK */
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| 267 |
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} ifcfg;
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| 268 |
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| 269 |
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/* queue handling */
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| 270 |
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struct {
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| 271 |
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Queue_t issue; /* issue queue */
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| 272 |
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Queue_t disconnected; /* disconnected command queue */
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| 273 |
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} queues;
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| 274 |
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| 275 |
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/* per-device info */
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| 276 |
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struct fas216_device {
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| 277 |
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unsigned char disconnect_ok:1; /* device can disconnect */
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| 278 |
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unsigned char period; /* sync xfer period in (*4ns) */
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| 279 |
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unsigned char stp; /* synchronous transfer period */
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| 280 |
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unsigned char sof; /* synchronous offset register */
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| 281 |
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unsigned char wide_xfer; /* currently negociated wide transfer */
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| 282 |
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neg_t sync_state; /* synchronous transfer mode */
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| 283 |
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neg_t wide_state; /* wide transfer mode */
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| 284 |
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} device[8];
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| 285 |
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unsigned char busyluns[8]; /* array of bits indicating LUNs busy */
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| 286 |
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| 287 |
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/* dma */
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| 288 |
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struct {
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| 289 |
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fasdmatype_t transfer_type; /* current type of DMA transfer */
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fasdmatype_t (*setup) (struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
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| 291 |
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void (*pseudo)(struct Scsi_Host *host, Scsi_Pointer *SCp, fasdmadir_t direction, int transfer);
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| 292 |
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void (*stop) (struct Scsi_Host *host, Scsi_Pointer *SCp);
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| 293 |
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} dma;
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| 294 |
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| 295 |
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/* miscellaneous */
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| 296 |
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int internal_done; /* flag to indicate request done */
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| 297 |
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| 298 |
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unsigned long magic_end;
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| 299 |
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} FAS216_Info;
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| 300 |
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| 301 |
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/* Function: int fas216_init (struct Scsi_Host *instance)
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| 302 |
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* Purpose : initialise FAS/NCR/AMD SCSI ic.
|
| 303 |
|
|
* Params : instance - a driver-specific filled-out structure
|
| 304 |
|
|
* Returns : 0 on success
|
| 305 |
|
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*/
|
| 306 |
|
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extern int fas216_init (struct Scsi_Host *instance);
|
| 307 |
|
|
|
| 308 |
|
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/* Function: int fas216_abort (Scsi_Cmnd *SCpnt)
|
| 309 |
|
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* Purpose : abort a command if something horrible happens.
|
| 310 |
|
|
* Params : SCpnt - Command that is believed to be causing a problem.
|
| 311 |
|
|
* Returns : one of SCSI_ABORT_ macros.
|
| 312 |
|
|
*/
|
| 313 |
|
|
extern int fas216_abort (Scsi_Cmnd *);
|
| 314 |
|
|
|
| 315 |
|
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/* Function: int fas216_reset (Scsi_Cmnd *SCpnt, unsigned int reset_flags)
|
| 316 |
|
|
* Purpose : resets the adapter if something horrible happens.
|
| 317 |
|
|
* Params : SCpnt - Command that is believed to be causing a problem.
|
| 318 |
|
|
* reset_flags - flags indicating reset type that is believed to be required.
|
| 319 |
|
|
* Returns : one of SCSI_RESET_ macros, or'd with the SCSI_RESET_*_RESET macros.
|
| 320 |
|
|
*/
|
| 321 |
|
|
extern int fas216_reset (Scsi_Cmnd *, unsigned int);
|
| 322 |
|
|
|
| 323 |
|
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/* Function: int fas216_queue_command (Scsi_Cmnd *SCpnt, void (*done)(Scsi_Cmnd *))
|
| 324 |
|
|
* Purpose : queue a command for adapter to process.
|
| 325 |
|
|
* Params : SCpnt - Command to queue
|
| 326 |
|
|
* done - done function to call once command is complete
|
| 327 |
|
|
* Returns : 0 - success, else error
|
| 328 |
|
|
*/
|
| 329 |
|
|
extern int fas216_queue_command (Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
|
| 330 |
|
|
|
| 331 |
|
|
/* Function: int fas216_command (Scsi_Cmnd *SCpnt)
|
| 332 |
|
|
* Purpose : queue a command for adapter to process.
|
| 333 |
|
|
* Params : SCpnt - Command to queue
|
| 334 |
|
|
* Returns : scsi result code
|
| 335 |
|
|
*/
|
| 336 |
|
|
extern int fas216_command (Scsi_Cmnd *);
|
| 337 |
|
|
|
| 338 |
|
|
/* Function: void fas216_intr (struct Scsi_Host *instance)
|
| 339 |
|
|
* Purpose : handle interrupts from the interface to progress a command
|
| 340 |
|
|
* Params : instance - interface to service
|
| 341 |
|
|
*/
|
| 342 |
|
|
extern void fas216_intr (struct Scsi_Host *instance);
|
| 343 |
|
|
|
| 344 |
|
|
/* Function: int fas216_release (struct Scsi_Host *instance)
|
| 345 |
|
|
* Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
|
| 346 |
|
|
* Params : instance - a driver-specific filled-out structure
|
| 347 |
|
|
* Returns : 0 on success
|
| 348 |
|
|
*/
|
| 349 |
|
|
extern int fas216_release (struct Scsi_Host *instance);
|
| 350 |
|
|
|
| 351 |
|
|
extern int fas216_print_stats(FAS216_Info *info, char *buffer);
|
| 352 |
|
|
extern int fas216_print_device(FAS216_Info *info, Scsi_Device *scd, char *buffer);
|
| 353 |
|
|
|
| 354 |
|
|
#endif /* FAS216_H */
|
