351 lines
9.3 KiB
C
351 lines
9.3 KiB
C
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/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* linux/drivers/acorn/scsi/acornscsi.h
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*
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* Copyright (C) 1997 Russell King
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*
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* Acorn SCSI driver
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*/
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#ifndef ACORNSCSI_H
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#define ACORNSCSI_H
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/* SBIC registers */
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#define SBIC_OWNID 0
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#define OWNID_FS1 (1<<7)
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#define OWNID_FS2 (1<<6)
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#define OWNID_EHP (1<<4)
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#define OWNID_EAF (1<<3)
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#define SBIC_CTRL 1
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#define CTRL_DMAMODE (1<<7)
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#define CTRL_DMADBAMODE (1<<6)
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#define CTRL_DMABURST (1<<5)
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#define CTRL_DMAPOLLED 0
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#define CTRL_HHP (1<<4)
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#define CTRL_EDI (1<<3)
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#define CTRL_IDI (1<<2)
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#define CTRL_HA (1<<1)
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#define CTRL_HSP (1<<0)
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#define SBIC_TIMEOUT 2
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#define SBIC_TOTSECTS 3
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#define SBIC_TOTHEADS 4
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#define SBIC_TOTCYLH 5
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#define SBIC_TOTCYLL 6
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#define SBIC_LOGADDRH 7
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#define SBIC_LOGADDRM2 8
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#define SBIC_LOGADDRM1 9
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#define SBIC_LOGADDRL 10
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#define SBIC_SECTORNUM 11
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#define SBIC_HEADNUM 12
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#define SBIC_CYLH 13
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#define SBIC_CYLL 14
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#define SBIC_TARGETLUN 15
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#define TARGETLUN_TLV (1<<7)
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#define TARGETLUN_DOK (1<<6)
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#define SBIC_CMNDPHASE 16
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#define SBIC_SYNCHTRANSFER 17
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#define SYNCHTRANSFER_OF0 0x00
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#define SYNCHTRANSFER_OF1 0x01
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#define SYNCHTRANSFER_OF2 0x02
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#define SYNCHTRANSFER_OF3 0x03
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#define SYNCHTRANSFER_OF4 0x04
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#define SYNCHTRANSFER_OF5 0x05
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#define SYNCHTRANSFER_OF6 0x06
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#define SYNCHTRANSFER_OF7 0x07
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#define SYNCHTRANSFER_OF8 0x08
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#define SYNCHTRANSFER_OF9 0x09
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#define SYNCHTRANSFER_OF10 0x0A
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#define SYNCHTRANSFER_OF11 0x0B
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#define SYNCHTRANSFER_OF12 0x0C
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#define SYNCHTRANSFER_8DBA 0x00
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#define SYNCHTRANSFER_2DBA 0x20
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#define SYNCHTRANSFER_3DBA 0x30
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#define SYNCHTRANSFER_4DBA 0x40
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#define SYNCHTRANSFER_5DBA 0x50
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#define SYNCHTRANSFER_6DBA 0x60
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#define SYNCHTRANSFER_7DBA 0x70
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#define SBIC_TRANSCNTH 18
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#define SBIC_TRANSCNTM 19
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#define SBIC_TRANSCNTL 20
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#define SBIC_DESTID 21
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#define DESTID_SCC (1<<7)
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#define DESTID_DPD (1<<6)
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#define SBIC_SOURCEID 22
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#define SOURCEID_ER (1<<7)
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#define SOURCEID_ES (1<<6)
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#define SOURCEID_DSP (1<<5)
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#define SOURCEID_SIV (1<<4)
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#define SBIC_SSR 23
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#define SBIC_CMND 24
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#define CMND_RESET 0x00
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#define CMND_ABORT 0x01
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#define CMND_ASSERTATN 0x02
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#define CMND_NEGATEACK 0x03
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#define CMND_DISCONNECT 0x04
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#define CMND_RESELECT 0x05
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#define CMND_SELWITHATN 0x06
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#define CMND_SELECT 0x07
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#define CMND_SELECTATNTRANSFER 0x08
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#define CMND_SELECTTRANSFER 0x09
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#define CMND_RESELECTRXDATA 0x0A
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#define CMND_RESELECTTXDATA 0x0B
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#define CMND_WAITFORSELRECV 0x0C
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#define CMND_SENDSTATCMD 0x0D
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#define CMND_SENDDISCONNECT 0x0E
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#define CMND_SETIDI 0x0F
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#define CMND_RECEIVECMD 0x10
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#define CMND_RECEIVEDTA 0x11
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#define CMND_RECEIVEMSG 0x12
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#define CMND_RECEIVEUSP 0x13
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#define CMND_SENDCMD 0x14
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#define CMND_SENDDATA 0x15
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#define CMND_SENDMSG 0x16
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#define CMND_SENDUSP 0x17
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#define CMND_TRANSLATEADDR 0x18
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#define CMND_XFERINFO 0x20
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#define CMND_SBT (1<<7)
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#define SBIC_DATA 25
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#define SBIC_ASR 26
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#define ASR_INT (1<<7)
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#define ASR_LCI (1<<6)
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#define ASR_BSY (1<<5)
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#define ASR_CIP (1<<4)
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#define ASR_PE (1<<1)
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#define ASR_DBR (1<<0)
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/* DMAC registers */
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#define DMAC_INIT 0x00
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#define INIT_8BIT (1)
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#define DMAC_CHANNEL 0x80
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#define CHANNEL_0 0x00
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#define CHANNEL_1 0x01
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#define CHANNEL_2 0x02
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#define CHANNEL_3 0x03
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#define DMAC_TXCNTLO 0x01
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#define DMAC_TXCNTHI 0x81
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#define DMAC_TXADRLO 0x02
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#define DMAC_TXADRMD 0x82
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#define DMAC_TXADRHI 0x03
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#define DMAC_DEVCON0 0x04
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#define DEVCON0_AKL (1<<7)
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#define DEVCON0_RQL (1<<6)
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#define DEVCON0_EXW (1<<5)
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#define DEVCON0_ROT (1<<4)
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#define DEVCON0_CMP (1<<3)
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#define DEVCON0_DDMA (1<<2)
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#define DEVCON0_AHLD (1<<1)
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#define DEVCON0_MTM (1<<0)
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#define DMAC_DEVCON1 0x84
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#define DEVCON1_WEV (1<<1)
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#define DEVCON1_BHLD (1<<0)
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#define DMAC_MODECON 0x05
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#define MODECON_WOED 0x01
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#define MODECON_VERIFY 0x00
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#define MODECON_READ 0x04
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#define MODECON_WRITE 0x08
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#define MODECON_AUTOINIT 0x10
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#define MODECON_ADDRDIR 0x20
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#define MODECON_DEMAND 0x00
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#define MODECON_SINGLE 0x40
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#define MODECON_BLOCK 0x80
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#define MODECON_CASCADE 0xC0
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#define DMAC_STATUS 0x85
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#define STATUS_TC0 (1<<0)
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#define STATUS_RQ0 (1<<4)
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#define DMAC_TEMPLO 0x06
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#define DMAC_TEMPHI 0x86
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#define DMAC_REQREG 0x07
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#define DMAC_MASKREG 0x87
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#define MASKREG_M0 0x01
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#define MASKREG_M1 0x02
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#define MASKREG_M2 0x04
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#define MASKREG_M3 0x08
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/* miscellaneous internal variables */
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#define MASK_ON (MASKREG_M3|MASKREG_M2|MASKREG_M1|MASKREG_M0)
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#define MASK_OFF (MASKREG_M3|MASKREG_M2|MASKREG_M1)
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/*
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* SCSI driver phases
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*/
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typedef enum {
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PHASE_IDLE, /* we're not planning on doing anything */
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PHASE_CONNECTING, /* connecting to a target */
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PHASE_CONNECTED, /* connected to a target */
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PHASE_MSGOUT, /* message out to device */
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PHASE_RECONNECTED, /* reconnected */
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PHASE_COMMANDPAUSED, /* command partly sent */
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PHASE_COMMAND, /* command all sent */
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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_STATUSIN, /* status in from device */
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PHASE_MSGIN, /* message in from device */
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PHASE_DONE, /* finished */
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PHASE_ABORTED, /* aborted */
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PHASE_DISCONNECT, /* disconnecting */
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} phase_t;
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/*
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* After interrupt, what to do now
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*/
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typedef enum {
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INTR_IDLE, /* not expecting another IRQ */
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INTR_NEXT_COMMAND, /* start next command */
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INTR_PROCESSING, /* interrupt routine still processing */
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} intr_ret_t;
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/*
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* DMA direction
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*/
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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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} dmadir_t;
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/*
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* Synchronous transfer state
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*/
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typedef enum { /* Synchronous transfer state */
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SYNC_ASYNCHRONOUS, /* don't negotiate synchronous transfers*/
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SYNC_NEGOCIATE, /* start negotiation */
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SYNC_SENT_REQUEST, /* sent SDTR message */
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SYNC_COMPLETED, /* received SDTR reply */
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} syncxfer_t;
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/*
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* Command type
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*/
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typedef enum { /* command type */
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CMD_READ, /* READ_6, READ_10, READ_12 */
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CMD_WRITE, /* WRITE_6, WRITE_10, WRITE_12 */
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CMD_MISC, /* Others */
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} cmdtype_t;
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/*
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* Data phase direction
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*/
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typedef enum { /* Data direction */
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DATADIR_IN, /* Data in phase expected */
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DATADIR_OUT /* Data out phase expected */
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} datadir_t;
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#include "queue.h"
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#include "msgqueue.h"
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#define STATUS_BUFFER_SIZE 32
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/*
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* This is used to dump the previous states of the SBIC
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*/
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struct status_entry {
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unsigned long when;
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unsigned char ssr;
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unsigned char ph;
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unsigned char irq;
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unsigned char unused;
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};
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#define ADD_STATUS(_q,_ssr,_ph,_irq) \
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({ \
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host->status[(_q)][host->status_ptr[(_q)]].when = jiffies; \
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host->status[(_q)][host->status_ptr[(_q)]].ssr = (_ssr); \
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host->status[(_q)][host->status_ptr[(_q)]].ph = (_ph); \
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host->status[(_q)][host->status_ptr[(_q)]].irq = (_irq); \
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host->status_ptr[(_q)] = (host->status_ptr[(_q)] + 1) & (STATUS_BUFFER_SIZE - 1); \
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})
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/*
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* AcornSCSI host specific data
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*/
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typedef struct acornscsi_hostdata {
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/* miscellaneous */
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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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void __iomem *base; /* memc base address */
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void __iomem *fast; /* fast ioc base address */
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/* driver information */
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struct {
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unsigned int irq; /* interrupt */
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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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struct scsi_pointer SCp; /* current commands data pointer */
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MsgQueue_t msgs;
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unsigned short last_message; /* last message to be sent */
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unsigned char disconnectable:1; /* this command can be disconnected */
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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 resets;
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} stats;
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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 {
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unsigned char sync_xfer; /* synchronous transfer (SBIC value) */
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syncxfer_t sync_state; /* sync xfer negotiation state */
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unsigned char disconnect_ok:1; /* device can disconnect */
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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 info */
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struct {
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unsigned int free_addr; /* next free address */
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unsigned int start_addr; /* start address of current transfer */
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dmadir_t direction; /* dma direction */
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unsigned int transferred; /* number of bytes transferred */
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unsigned int xfer_start; /* scheduled DMA transfer start */
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unsigned int xfer_length; /* scheduled DMA transfer length */
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char *xfer_ptr; /* pointer to area */
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unsigned char xfer_required:1; /* set if we need to transfer something */
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unsigned char xfer_setup:1; /* set if DMA is setup */
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unsigned char xfer_done:1; /* set if DMA reached end of BH list */
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} dma;
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/* card info */
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struct {
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unsigned char page_reg; /* current setting of page reg */
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} card;
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unsigned char status_ptr[9];
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struct status_entry status[9][STATUS_BUFFER_SIZE];
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} AS_Host;
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#endif /* ACORNSCSI_H */
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