400 lines
14 KiB
C
400 lines
14 KiB
C
/*
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* linux/drivers/acorn/scsi/fas216.h
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*
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* Copyright (C) 1997-2000 Russell King
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*
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* FAS216 generic driver
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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 <scsi/scsi_eh.h>
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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 (0)
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#define REG_STCL (0)
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/* transfer count medium */
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#define REG_CTCM (1)
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#define REG_STCM (1)
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/* fifo data */
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#define REG_FF (2)
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/* command */
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#define REG_CMD (3)
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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 (4)
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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 (4)
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#define BUSID(target) ((target) & 7)
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/* Interrupt status register (read) */
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#define REG_INST (5)
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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 (5)
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/* Sequence step register (read) */
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#define REG_IS (6)
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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 (6)
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/* Synchronous Offset (write) */
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#define REG_SOF (7)
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/* Fifo state register (read) */
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#define REG_CFIS (7)
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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 (8)
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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 (9)
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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 REG_FTM (10)
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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 (11)
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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 (12)
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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 (14)
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#define REG_STCH (14)
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/* ID register (read only) */
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#define REG_ID (14)
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/* Data alignment */
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#define REG_DAL (15)
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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_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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#define FASCAP_DMA (1 << 0)
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#define FASCAP_PSEUDODMA (1 << 1)
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typedef struct {
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unsigned long magic_start;
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spinlock_t host_lock;
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struct Scsi_Host *host; /* host */
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struct scsi_cmnd *SCpnt; /* currently processing command */
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struct scsi_cmnd *origSCpnt; /* original connecting command */
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struct scsi_cmnd *reqSCpnt; /* request sense command */
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struct scsi_cmnd *rstSCpnt; /* reset command */
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struct scsi_cmnd *pending_SCpnt[8]; /* per-device pending commands */
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int next_pending; /* next pending device */
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/*
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* Error recovery
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*/
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wait_queue_head_t eh_wait;
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struct timer_list eh_timer;
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unsigned int rst_dev_status;
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unsigned int rst_bus_status;
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/* driver information */
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struct {
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phase_t phase; /* current phase */
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void __iomem *io_base; /* iomem base of FAS216 */
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unsigned int io_shift; /* shift to adjust reg offsets by */
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unsigned char cfg[4]; /* configuration registers */
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const char *type; /* chip type */
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unsigned int irq; /* interrupt */
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int dma; /* dma channel */
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struct 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 message[256]; /* last message received from device */
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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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/* 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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unsigned int fins;
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unsigned int reads;
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unsigned int writes;
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unsigned int miscs;
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unsigned int disconnects;
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unsigned int aborts;
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unsigned int bus_resets;
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unsigned int host_resets;
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} stats;
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/* configuration information */
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struct {
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unsigned char clockrate; /* clock rate of FAS device (MHz) */
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unsigned char select_timeout; /* timeout (R5) */
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unsigned char sync_max_depth; /* Synchronous xfer max fifo depth */
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unsigned char wide_max_size; /* Maximum wide transfer size */
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unsigned char cntl3; /* Control Reg 3 */
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unsigned int asyncperiod; /* Async transfer period (ns) */
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unsigned int capabilities; /* driver capabilities */
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unsigned int disconnect_ok:1; /* Disconnects allowed? */
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} ifcfg;
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/* queue handling */
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struct {
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Queue_t issue; /* issue queue */
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Queue_t disconnected; /* disconnected command queue */
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} queues;
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/* per-device info */
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struct fas216_device {
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unsigned char disconnect_ok:1; /* device can disconnect */
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unsigned char parity_enabled:1; /* parity checking enabled */
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unsigned char parity_check:1; /* need to check parity checking */
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unsigned char period; /* sync xfer period in (*4ns) */
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unsigned char stp; /* synchronous transfer period */
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unsigned char sof; /* synchronous offset register */
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unsigned char wide_xfer; /* currently negociated wide transfer */
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neg_t sync_state; /* synchronous transfer mode */
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neg_t wide_state; /* wide transfer mode */
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} device[8];
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unsigned long busyluns[64/sizeof(unsigned long)];/* array of bits indicating LUNs busy */
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/* dma */
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struct {
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fasdmatype_t transfer_type; /* current type of DMA transfer */
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fasdmatype_t (*setup) (struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, fasdmatype_t min_dma);
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void (*pseudo)(struct Scsi_Host *host, struct scsi_pointer *SCp, fasdmadir_t direction, int transfer);
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void (*stop) (struct Scsi_Host *host, struct scsi_pointer *SCp);
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} dma;
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/* miscellaneous */
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int internal_done; /* flag to indicate request done */
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struct scsi_eh_save ses; /* holds request sense restore info */
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unsigned long magic_end;
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} FAS216_Info;
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/* Function: int fas216_init (struct Scsi_Host *instance)
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* Purpose : initialise FAS/NCR/AMD SCSI structures.
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* Params : instance - a driver-specific filled-out structure
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* Returns : 0 on success
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*/
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extern int fas216_init (struct Scsi_Host *instance);
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/* Function: int fas216_add (struct Scsi_Host *instance, struct device *dev)
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* Purpose : initialise FAS/NCR/AMD SCSI ic.
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* Params : instance - a driver-specific filled-out structure
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* Returns : 0 on success
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*/
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extern int fas216_add (struct Scsi_Host *instance, struct device *dev);
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/* Function: int fas216_queue_command(struct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
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* Purpose : queue a command for adapter to process.
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* Params : SCpnt - Command to queue
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* done - done function to call once command is complete
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* Returns : 0 - success, else error
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*/
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extern int fas216_queue_command(struct scsi_cmnd *,
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void (*done)(struct scsi_cmnd *));
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/* Function: int fas216_noqueue_command(istruct scsi_cmnd *SCpnt, void (*done)(struct scsi_cmnd *))
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* Purpose : queue a command for adapter to process, and process it to completion.
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* Params : SCpnt - Command to queue
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* done - done function to call once command is complete
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* Returns : 0 - success, else error
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*/
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extern int fas216_noqueue_command(struct scsi_cmnd *,
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void (*done)(struct scsi_cmnd *));
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/* Function: irqreturn_t fas216_intr (FAS216_Info *info)
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* Purpose : handle interrupts from the interface to progress a command
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* Params : info - interface to service
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*/
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extern irqreturn_t fas216_intr (FAS216_Info *info);
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extern void fas216_remove (struct Scsi_Host *instance);
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/* Function: void fas216_release (struct Scsi_Host *instance)
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* Purpose : release all resources and put everything to bed for FAS/NCR/AMD SCSI ic.
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* Params : instance - a driver-specific filled-out structure
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* Returns : 0 on success
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*/
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extern void fas216_release (struct Scsi_Host *instance);
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extern int fas216_print_host(FAS216_Info *info, char *buffer);
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extern int fas216_print_stats(FAS216_Info *info, char *buffer);
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extern int fas216_print_devices(FAS216_Info *info, char *buffer);
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/* Function: int fas216_eh_abort(struct scsi_cmnd *SCpnt)
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* Purpose : abort this command
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* Params : SCpnt - command to abort
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* Returns : FAILED if unable to abort
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*/
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extern int fas216_eh_abort(struct scsi_cmnd *SCpnt);
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/* Function: int fas216_eh_device_reset(struct scsi_cmnd *SCpnt)
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* Purpose : Reset the device associated with this command
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* Params : SCpnt - command specifing device to reset
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* Returns : FAILED if unable to reset
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*/
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extern int fas216_eh_device_reset(struct scsi_cmnd *SCpnt);
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/* Function: int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt)
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* Purpose : Reset the complete bus associated with this command
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* Params : SCpnt - command specifing bus to reset
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* Returns : FAILED if unable to reset
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*/
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extern int fas216_eh_bus_reset(struct scsi_cmnd *SCpnt);
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/* Function: int fas216_eh_host_reset(struct scsi_cmnd *SCpnt)
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* Purpose : Reset the host associated with this command
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* Params : SCpnt - command specifing host to reset
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* Returns : FAILED if unable to reset
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*/
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extern int fas216_eh_host_reset(struct scsi_cmnd *SCpnt);
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#endif /* FAS216_H */
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