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linux/drivers/scsi/53c7xx.h

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Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
2005-04-16 22:20:36 +00:00
/*
* 53c710 driver. Modified from Drew Eckhardts driver
* for 53c810 by Richard Hirst [richard@sleepie.demon.co.uk]
*
* I have left the code for the 53c8xx family in here, because it didn't
* seem worth removing it. The possibility of IO_MAPPED chips rather
* than MEMORY_MAPPED remains, in case someone wants to add support for
* 53c710 chips on Intel PCs (some older machines have them on the
* motherboard).
*
* NOTE THERE MAY BE PROBLEMS WITH CASTS IN read8 AND Co.
*/
/*
* NCR 53c{7,8}0x0 driver, header file
*
* Sponsored by
* iX Multiuser Multitasking Magazine
* Hannover, Germany
* hm@ix.de
*
* Copyright 1993, 1994, 1995 Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@PoohSticks.ORG
* +1 (303) 786-7975
*
* TolerANT and SCSI SCRIPTS are registered trademarks of NCR Corporation.
*
* PRE-ALPHA
*
* For more information, please consult
*
* NCR 53C700/53C700-66
* SCSI I/O Processor
* Data Manual
*
* NCR 53C810
* PCI-SCSI I/O Processor
* Data Manual
*
* NCR Microelectronics
* 1635 Aeroplaza Drive
* Colorado Springs, CO 80916
* +1 (719) 578-3400
*
* Toll free literature number
* +1 (800) 334-5454
*
*/
#ifndef NCR53c710_H
#define NCR53c710_H
#ifndef HOSTS_C
/* SCSI control 0 rw, default = 0xc0 */
#define SCNTL0_REG 0x00
#define SCNTL0_ARB1 0x80 /* 0 0 = simple arbitration */
#define SCNTL0_ARB2 0x40 /* 1 1 = full arbitration */
#define SCNTL0_STRT 0x20 /* Start Sequence */
#define SCNTL0_WATN 0x10 /* Select with ATN */
#define SCNTL0_EPC 0x08 /* Enable parity checking */
/* Bit 2 is reserved on 800 series chips */
#define SCNTL0_EPG_700 0x04 /* Enable parity generation */
#define SCNTL0_AAP 0x02 /* ATN/ on parity error */
#define SCNTL0_TRG 0x01 /* Target mode */
/* SCSI control 1 rw, default = 0x00 */
#define SCNTL1_REG 0x01
#define SCNTL1_EXC 0x80 /* Extra Clock Cycle of Data setup */
#define SCNTL1_ADB 0x40 /* contents of SODL on bus */
#define SCNTL1_ESR_700 0x20 /* Enable SIOP response to selection
and reselection */
#define SCNTL1_DHP_800 0x20 /* Disable halt on parity error or ATN
target mode only */
#define SCNTL1_CON 0x10 /* Connected */
#define SCNTL1_RST 0x08 /* SCSI RST/ */
#define SCNTL1_AESP 0x04 /* Force bad parity */
#define SCNTL1_SND_700 0x02 /* Start SCSI send */
#define SCNTL1_IARB_800 0x02 /* Immediate Arbitration, start
arbitration immediately after
busfree is detected */
#define SCNTL1_RCV_700 0x01 /* Start SCSI receive */
#define SCNTL1_SST_800 0x01 /* Start SCSI transfer */
/* SCSI control 2 rw, */
#define SCNTL2_REG_800 0x02
#define SCNTL2_800_SDU 0x80 /* SCSI disconnect unexpected */
/* SCSI control 3 rw */
#define SCNTL3_REG_800 0x03
#define SCNTL3_800_SCF_SHIFT 4
#define SCNTL3_800_SCF_MASK 0x70
#define SCNTL3_800_SCF2 0x40 /* Synchronous divisor */
#define SCNTL3_800_SCF1 0x20 /* 0x00 = SCLK/3 */
#define SCNTL3_800_SCF0 0x10 /* 0x10 = SCLK/1 */
/* 0x20 = SCLK/1.5
0x30 = SCLK/2
0x40 = SCLK/3 */
#define SCNTL3_800_CCF_SHIFT 0
#define SCNTL3_800_CCF_MASK 0x07
#define SCNTL3_800_CCF2 0x04 /* 0x00 50.01 to 66 */
#define SCNTL3_800_CCF1 0x02 /* 0x01 16.67 to 25 */
#define SCNTL3_800_CCF0 0x01 /* 0x02 25.01 - 37.5
0x03 37.51 - 50
0x04 50.01 - 66 */
/*
* SCSI destination ID rw - the appropriate bit is set for the selected
* target ID. This is written by the SCSI SCRIPTS processor.
* default = 0x00
*/
#define SDID_REG_700 0x02
#define SDID_REG_800 0x06
#define GP_REG_800 0x07 /* General purpose IO */
#define GP_800_IO1 0x02
#define GP_800_IO2 0x01
/* SCSI interrupt enable rw, default = 0x00 */
#define SIEN_REG_700 0x03
#define SIEN0_REG_800 0x40
#define SIEN_MA 0x80 /* Phase mismatch (ini) or ATN (tgt) */
#define SIEN_FC 0x40 /* Function complete */
#define SIEN_700_STO 0x20 /* Selection or reselection timeout */
#define SIEN_800_SEL 0x20 /* Selected */
#define SIEN_700_SEL 0x10 /* Selected or reselected */
#define SIEN_800_RESEL 0x10 /* Reselected */
#define SIEN_SGE 0x08 /* SCSI gross error */
#define SIEN_UDC 0x04 /* Unexpected disconnect */
#define SIEN_RST 0x02 /* SCSI RST/ received */
#define SIEN_PAR 0x01 /* Parity error */
/*
* SCSI chip ID rw
* NCR53c700 :
* When arbitrating, the highest bit is used, when reselection or selection
* occurs, the chip responds to all IDs for which a bit is set.
* default = 0x00
* NCR53c810 :
* Uses bit mapping
*/
#define SCID_REG 0x04
/* Bit 7 is reserved on 800 series chips */
#define SCID_800_RRE 0x40 /* Enable response to reselection */
#define SCID_800_SRE 0x20 /* Enable response to selection */
/* Bits four and three are reserved on 800 series chips */
#define SCID_800_ENC_MASK 0x07 /* Encoded SCSI ID */
/* SCSI transfer rw, default = 0x00 */
#define SXFER_REG 0x05
#define SXFER_DHP 0x80 /* Disable halt on parity */
#define SXFER_TP2 0x40 /* Transfer period msb */
#define SXFER_TP1 0x20
#define SXFER_TP0 0x10 /* lsb */
#define SXFER_TP_MASK 0x70
/* FIXME : SXFER_TP_SHIFT == 5 is right for '8xx chips */
#define SXFER_TP_SHIFT 5
#define SXFER_TP_4 0x00 /* Divisors */
#define SXFER_TP_5 0x10<<1
#define SXFER_TP_6 0x20<<1
#define SXFER_TP_7 0x30<<1
#define SXFER_TP_8 0x40<<1
#define SXFER_TP_9 0x50<<1
#define SXFER_TP_10 0x60<<1
#define SXFER_TP_11 0x70<<1
#define SXFER_MO3 0x08 /* Max offset msb */
#define SXFER_MO2 0x04
#define SXFER_MO1 0x02
#define SXFER_MO0 0x01 /* lsb */
#define SXFER_MO_MASK 0x0f
#define SXFER_MO_SHIFT 0
/*
* SCSI output data latch rw
* The contents of this register are driven onto the SCSI bus when
* the Assert Data Bus bit of the SCNTL1 register is set and
* the CD, IO, and MSG bits of the SOCL register match the SCSI phase
*/
#define SODL_REG_700 0x06
#define SODL_REG_800 0x54
/*
* SCSI output control latch rw, default = 0
* Note that when the chip is being manually programmed as an initiator,
* the MSG, CD, and IO bits must be set correctly for the phase the target
* is driving the bus in. Otherwise no data transfer will occur due to
* phase mismatch.
*/
#define SOCL_REG 0x07
#define SOCL_REQ 0x80 /* REQ */
#define SOCL_ACK 0x40 /* ACK */
#define SOCL_BSY 0x20 /* BSY */
#define SOCL_SEL 0x10 /* SEL */
#define SOCL_ATN 0x08 /* ATN */
#define SOCL_MSG 0x04 /* MSG */
#define SOCL_CD 0x02 /* C/D */
#define SOCL_IO 0x01 /* I/O */
/*
* SCSI first byte received latch ro
* This register contains the first byte received during a block MOVE
* SCSI SCRIPTS instruction, including
*
* Initiator mode Target mode
* Message in Command
* Status Message out
* Data in Data out
*
* It also contains the selecting or reselecting device's ID and our
* ID.
*
* Note that this is the register the various IF conditionals can
* operate on.
*/
#define SFBR_REG 0x08
/*
* SCSI input data latch ro
* In initiator mode, data is latched into this register on the rising
* edge of REQ/. In target mode, data is latched on the rising edge of
* ACK/
*/
#define SIDL_REG_700 0x09
#define SIDL_REG_800 0x50
/*
* SCSI bus data lines ro
* This register reflects the instantaneous status of the SCSI data
* lines. Note that SCNTL0 must be set to disable parity checking,
* otherwise reading this register will latch new parity.
*/
#define SBDL_REG_700 0x0a
#define SBDL_REG_800 0x58
#define SSID_REG_800 0x0a
#define SSID_800_VAL 0x80 /* Exactly two bits asserted at sel */
#define SSID_800_ENCID_MASK 0x07 /* Device which performed operation */
/*
* SCSI bus control lines rw,
* instantaneous readout of control lines
*/
#define SBCL_REG 0x0b
#define SBCL_REQ 0x80 /* REQ ro */
#define SBCL_ACK 0x40 /* ACK ro */
#define SBCL_BSY 0x20 /* BSY ro */
#define SBCL_SEL 0x10 /* SEL ro */
#define SBCL_ATN 0x08 /* ATN ro */
#define SBCL_MSG 0x04 /* MSG ro */
#define SBCL_CD 0x02 /* C/D ro */
#define SBCL_IO 0x01 /* I/O ro */
#define SBCL_PHASE_CMDOUT SBCL_CD
#define SBCL_PHASE_DATAIN SBCL_IO
#define SBCL_PHASE_DATAOUT 0
#define SBCL_PHASE_MSGIN (SBCL_CD|SBCL_IO|SBCL_MSG)
#define SBCL_PHASE_MSGOUT (SBCL_CD|SBCL_MSG)
#define SBCL_PHASE_STATIN (SBCL_CD|SBCL_IO)
#define SBCL_PHASE_MASK (SBCL_CD|SBCL_IO|SBCL_MSG)
/*
* Synchronous SCSI Clock Control bits
* 0 - set by DCNTL
* 1 - SCLK / 1.0
* 2 - SCLK / 1.5
* 3 - SCLK / 2.0
*/
#define SBCL_SSCF1 0x02 /* wo, -66 only */
#define SBCL_SSCF0 0x01 /* wo, -66 only */
#define SBCL_SSCF_MASK 0x03
/*
* XXX note : when reading the DSTAT and STAT registers to clear interrupts,
* insure that 10 clocks elapse between the two
*/
/* DMA status ro */
#define DSTAT_REG 0x0c
#define DSTAT_DFE 0x80 /* DMA FIFO empty */
#define DSTAT_800_MDPE 0x40 /* Master Data Parity Error */
#define DSTAT_800_BF 0x20 /* Bus Fault */
#define DSTAT_ABRT 0x10 /* Aborted - set on error */
#define DSTAT_SSI 0x08 /* SCRIPTS single step interrupt */
#define DSTAT_SIR 0x04 /* SCRIPTS interrupt received -
set when INT instruction is
executed */
#define DSTAT_WTD 0x02 /* Watchdog timeout detected */
#define DSTAT_OPC 0x01 /* Illegal instruction */
#define DSTAT_800_IID 0x01 /* Same thing, different name */
/* NCR53c800 moves this stuff into SIST0 */
#define SSTAT0_REG 0x0d /* SCSI status 0 ro */
#define SIST0_REG_800 0x42
#define SSTAT0_MA 0x80 /* ini : phase mismatch,
* tgt : ATN/ asserted
*/
#define SSTAT0_CMP 0x40 /* function complete */
#define SSTAT0_700_STO 0x20 /* Selection or reselection timeout */
#define SIST0_800_SEL 0x20 /* Selected */
#define SSTAT0_700_SEL 0x10 /* Selected or reselected */
#define SIST0_800_RSL 0x10 /* Reselected */
#define SSTAT0_SGE 0x08 /* SCSI gross error */
#define SSTAT0_UDC 0x04 /* Unexpected disconnect */
#define SSTAT0_RST 0x02 /* SCSI RST/ received */
#define SSTAT0_PAR 0x01 /* Parity error */
/* And uses SSTAT0 for what was SSTAT1 */
#define SSTAT1_REG 0x0e /* SCSI status 1 ro */
#define SSTAT1_ILF 0x80 /* SIDL full */
#define SSTAT1_ORF 0x40 /* SODR full */
#define SSTAT1_OLF 0x20 /* SODL full */
#define SSTAT1_AIP 0x10 /* Arbitration in progress */
#define SSTAT1_LOA 0x08 /* Lost arbitration */
#define SSTAT1_WOA 0x04 /* Won arbitration */
#define SSTAT1_RST 0x02 /* Instant readout of RST/ */
#define SSTAT1_SDP 0x01 /* Instant readout of SDP/ */
#define SSTAT2_REG 0x0f /* SCSI status 2 ro */
#define SSTAT2_FF3 0x80 /* number of bytes in synchronous */
#define SSTAT2_FF2 0x40 /* data FIFO */
#define SSTAT2_FF1 0x20
#define SSTAT2_FF0 0x10
#define SSTAT2_FF_MASK 0xf0
#define SSTAT2_FF_SHIFT 4
/*
* Latched signals, latched on the leading edge of REQ/ for initiators,
* ACK/ for targets.
*/
#define SSTAT2_SDP 0x08 /* SDP */
#define SSTAT2_MSG 0x04 /* MSG */
#define SSTAT2_CD 0x02 /* C/D */
#define SSTAT2_IO 0x01 /* I/O */
#define SSTAT2_PHASE_CMDOUT SSTAT2_CD
#define SSTAT2_PHASE_DATAIN SSTAT2_IO
#define SSTAT2_PHASE_DATAOUT 0
#define SSTAT2_PHASE_MSGIN (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG)
#define SSTAT2_PHASE_MSGOUT (SSTAT2_CD|SSTAT2_MSG)
#define SSTAT2_PHASE_STATIN (SSTAT2_CD|SSTAT2_IO)
#define SSTAT2_PHASE_MASK (SSTAT2_CD|SSTAT2_IO|SSTAT2_MSG)
/* NCR53c700-66 only */
#define SCRATCHA_REG_00 0x10 /* through 0x13 Scratch A rw */
/* NCR53c710 and higher */
#define DSA_REG 0x10 /* DATA structure address */
#define CTEST0_REG_700 0x14 /* Chip test 0 ro */
#define CTEST0_REG_800 0x18 /* Chip test 0 rw, general purpose */
/* 0x80 - 0x04 are reserved */
#define CTEST0_700_RTRG 0x02 /* Real target mode */
#define CTEST0_700_DDIR 0x01 /* Data direction, 1 =
* SCSI bus to host, 0 =
* host to SCSI.
*/
#define CTEST1_REG_700 0x15 /* Chip test 1 ro */
#define CTEST1_REG_800 0x19 /* Chip test 1 ro */
#define CTEST1_FMT3 0x80 /* Identify which byte lanes are empty */
#define CTEST1_FMT2 0x40 /* in the DMA FIFO */
#define CTEST1_FMT1 0x20
#define CTEST1_FMT0 0x10
#define CTEST1_FFL3 0x08 /* Identify which bytes lanes are full */
#define CTEST1_FFL2 0x04 /* in the DMA FIFO */
#define CTEST1_FFL1 0x02
#define CTEST1_FFL0 0x01
#define CTEST2_REG_700 0x16 /* Chip test 2 ro */
#define CTEST2_REG_800 0x1a /* Chip test 2 ro */
#define CTEST2_800_DDIR 0x80 /* 1 = SCSI->host */
#define CTEST2_800_SIGP 0x40 /* A copy of SIGP in ISTAT.
Reading this register clears */
#define CTEST2_800_CIO 0x20 /* Configured as IO */.
#define CTEST2_800_CM 0x10 /* Configured as memory */
/* 0x80 - 0x40 are reserved on 700 series chips */
#define CTEST2_700_SOFF 0x20 /* SCSI Offset Compare,
* As an initiator, this bit is
* one when the synchronous offset
* is zero, as a target this bit
* is one when the synchronous
* offset is at the maximum
* defined in SXFER
*/
#define CTEST2_700_SFP 0x10 /* SCSI FIFO parity bit,
* reading CTEST3 unloads a byte
* from the FIFO and sets this
*/
#define CTEST2_700_DFP 0x08 /* DMA FIFO parity bit,
* reading CTEST6 unloads a byte
* from the FIFO and sets this
*/
#define CTEST2_TEOP 0x04 /* SCSI true end of process,
* indicates a totally finished
* transfer
*/
#define CTEST2_DREQ 0x02 /* Data request signal */
/* 0x01 is reserved on 700 series chips */
#define CTEST2_800_DACK 0x01
/*
* Chip test 3 ro
* Unloads the bottom byte of the eight deep SCSI synchronous FIFO,
* check SSTAT2 FIFO full bits to determine size. Note that a GROSS
* error results if a read is attempted on this register. Also note
* that 16 and 32 bit reads of this register will cause corruption.
*/
#define CTEST3_REG_700 0x17
/* Chip test 3 rw */
#define CTEST3_REG_800 0x1b
#define CTEST3_800_V3 0x80 /* Chip revision */
#define CTEST3_800_V2 0x40
#define CTEST3_800_V1 0x20
#define CTEST3_800_V0 0x10
#define CTEST3_800_FLF 0x08 /* Flush DMA FIFO */
#define CTEST3_800_CLF 0x04 /* Clear DMA FIFO */
#define CTEST3_800_FM 0x02 /* Fetch mode pin */
/* bit 0 is reserved on 800 series chips */
#define CTEST4_REG_700 0x18 /* Chip test 4 rw */
#define CTEST4_REG_800 0x21 /* Chip test 4 rw */
/* 0x80 is reserved on 700 series chips */
#define CTEST4_800_BDIS 0x80 /* Burst mode disable */
#define CTEST4_ZMOD 0x40 /* High impedance mode */
#define CTEST4_SZM 0x20 /* SCSI bus high impedance */
#define CTEST4_700_SLBE 0x10 /* SCSI loopback enabled */
#define CTEST4_800_SRTM 0x10 /* Shadow Register Test Mode */
#define CTEST4_700_SFWR 0x08 /* SCSI FIFO write enable,
* redirects writes from SODL
* to the SCSI FIFO.
*/
#define CTEST4_800_MPEE 0x08 /* Enable parity checking
during master cycles on PCI
bus */
/*
* These bits send the contents of the CTEST6 register to the appropriate
* byte lane of the 32 bit DMA FIFO. Normal operation is zero, otherwise
* the high bit means the low two bits select the byte lane.
*/
#define CTEST4_FBL2 0x04
#define CTEST4_FBL1 0x02
#define CTEST4_FBL0 0x01
#define CTEST4_FBL_MASK 0x07
#define CTEST4_FBL_0 0x04 /* Select DMA FIFO byte lane 0 */
#define CTEST4_FBL_1 0x05 /* Select DMA FIFO byte lane 1 */
#define CTEST4_FBL_2 0x06 /* Select DMA FIFO byte lane 2 */
#define CTEST4_FBL_3 0x07 /* Select DMA FIFO byte lane 3 */
#define CTEST4_800_SAVE (CTEST4_800_BDIS)
#define CTEST5_REG_700 0x19 /* Chip test 5 rw */
#define CTEST5_REG_800 0x22 /* Chip test 5 rw */
/*
* Clock Address Incrementor. When set, it increments the
* DNAD register to the next bus size boundary. It automatically
* resets itself when the operation is complete.
*/
#define CTEST5_ADCK 0x80
/*
* Clock Byte Counter. When set, it decrements the DBC register to
* the next bus size boundary.
*/
#define CTEST5_BBCK 0x40
/*
* Reset SCSI Offset. Setting this bit to 1 clears the current offset
* pointer in the SCSI synchronous offset counter (SSTAT). This bit
* is set to 1 if a SCSI Gross Error Condition occurs. The offset should
* be cleared when a synchronous transfer fails. When written, it is
* automatically cleared after the SCSI synchronous offset counter is
* reset.
*/
/* Bit 5 is reserved on 800 series chips */
#define CTEST5_700_ROFF 0x20
/*
* Master Control for Set or Reset pulses. When 1, causes the low
* four bits of register to set when set, 0 causes the low bits to
* clear when set.
*/
#define CTEST5_MASR 0x10
#define CTEST5_DDIR 0x08 /* DMA direction */
/*
* Bits 2-0 are reserved on 800 series chips
*/
#define CTEST5_700_EOP 0x04 /* End of process */
#define CTEST5_700_DREQ 0x02 /* Data request */
#define CTEST5_700_DACK 0x01 /* Data acknowledge */
/*
* Chip test 6 rw - writing to this register writes to the byte
* lane in the DMA FIFO as determined by the FBL bits in the CTEST4
* register.
*/
#define CTEST6_REG_700 0x1a
#define CTEST6_REG_800 0x23
#define CTEST7_REG 0x1b /* Chip test 7 rw */
/* 0x80 - 0x40 are reserved on NCR53c700 and NCR53c700-66 chips */
#define CTEST7_10_CDIS 0x80 /* Cache burst disable */
#define CTEST7_10_SC1 0x40 /* Snoop control bits */
#define CTEST7_10_SC0 0x20
#define CTEST7_10_SC_MASK 0x60
/* 0x20 is reserved on the NCR53c700 */
#define CTEST7_0060_FM 0x20 /* Fetch mode */
#define CTEST7_STD 0x10 /* Selection timeout disable */
#define CTEST7_DFP 0x08 /* DMA FIFO parity bit for CTEST6 */
#define CTEST7_EVP 0x04 /* 1 = host bus even parity, 0 = odd */
#define CTEST7_10_TT1 0x02 /* Transfer type */
#define CTEST7_00_DC 0x02 /* Set to drive DC low during instruction
fetch */
#define CTEST7_DIFF 0x01 /* Differential mode */
#define CTEST7_SAVE ( CTEST7_EVP | CTEST7_DIFF )
#define TEMP_REG 0x1c /* through 0x1f Temporary stack rw */
#define DFIFO_REG 0x20 /* DMA FIFO rw */
/*
* 0x80 is reserved on the NCR53c710, the CLF and FLF bits have been
* moved into the CTEST8 register.
*/
#define DFIFO_00_FLF 0x80 /* Flush DMA FIFO to memory */
#define DFIFO_00_CLF 0x40 /* Clear DMA and SCSI FIFOs */
#define DFIFO_BO6 0x40
#define DFIFO_BO5 0x20
#define DFIFO_BO4 0x10
#define DFIFO_BO3 0x08
#define DFIFO_BO2 0x04
#define DFIFO_BO1 0x02
#define DFIFO_BO0 0x01
#define DFIFO_10_BO_MASK 0x7f /* 7 bit counter */
#define DFIFO_00_BO_MASK 0x3f /* 6 bit counter */
/*
* Interrupt status rw
* Note that this is the only register which can be read while SCSI
* SCRIPTS are being executed.
*/
#define ISTAT_REG_700 0x21
#define ISTAT_REG_800 0x14
#define ISTAT_ABRT 0x80 /* Software abort, write
*1 to abort, wait for interrupt. */
/* 0x40 and 0x20 are reserved on NCR53c700 and NCR53c700-66 chips */
#define ISTAT_10_SRST 0x40 /* software reset */
#define ISTAT_10_SIGP 0x20 /* signal script */
/* 0x10 is reserved on NCR53c700 series chips */
#define ISTAT_800_SEM 0x10 /* semaphore */
#define ISTAT_CON 0x08 /* 1 when connected */
#define ISTAT_800_INTF 0x04 /* Interrupt on the fly */
#define ISTAT_700_PRE 0x04 /* Pointer register empty.
* Set to 1 when DSPS and DSP
* registers are empty in pipeline
* mode, always set otherwise.
*/
#define ISTAT_SIP 0x02 /* SCSI interrupt pending from
* SCSI portion of SIOP see
* SSTAT0
*/
#define ISTAT_DIP 0x01 /* DMA interrupt pending
* see DSTAT
*/
/* NCR53c700-66 and NCR53c710 only */
#define CTEST8_REG 0x22 /* Chip test 8 rw */
#define CTEST8_0066_EAS 0x80 /* Enable alternate SCSI clock,
* ie read from SCLK/ rather than CLK/
*/
#define CTEST8_0066_EFM 0x40 /* Enable fetch and master outputs */
#define CTEST8_0066_GRP 0x20 /* Generate Receive Parity for
* pass through. This insures that
* bad parity won't reach the host
* bus.
*/
#define CTEST8_0066_TE 0x10 /* TolerANT enable. Enable
* active negation, should only
* be used for slow SCSI
* non-differential.
*/
#define CTEST8_0066_HSC 0x08 /* Halt SCSI clock */
#define CTEST8_0066_SRA 0x04 /* Shorten REQ/ACK filtering,
* must be set for fast SCSI-II
* speeds.
*/
#define CTEST8_0066_DAS 0x02 /* Disable automatic target/initiator
* switching.
*/
#define CTEST8_0066_LDE 0x01 /* Last disconnect enable.
* The status of pending
* disconnect is maintained by
* the core, eliminating
* the possibility of missing a
* selection or reselection
* while waiting to fetch a
* WAIT DISCONNECT opcode.
*/
#define CTEST8_10_V3 0x80 /* Chip revision */
#define CTEST8_10_V2 0x40
#define CTEST8_10_V1 0x20
#define CTEST8_10_V0 0x10
#define CTEST8_10_V_MASK 0xf0
#define CTEST8_10_FLF 0x08 /* Flush FIFOs */
#define CTEST8_10_CLF 0x04 /* Clear FIFOs */
#define CTEST8_10_FM 0x02 /* Fetch pin mode */
#define CTEST8_10_SM 0x01 /* Snoop pin mode */
/*
* The CTEST9 register may be used to differentiate between a
* NCR53c700 and a NCR53c710.
*
* Write 0xff to this register.
* Read it.
* If the contents are 0xff, it is a NCR53c700
* If the contents are 0x00, it is a NCR53c700-66 first revision
* If the contents are some other value, it is some other NCR53c700-66
*/
#define CTEST9_REG_00 0x23 /* Chip test 9 ro */
#define LCRC_REG_10 0x23
/*
* 0x24 through 0x27 are the DMA byte counter register. Instructions
* write their high 8 bits into the DCMD register, the low 24 bits into
* the DBC register.
*
* Function is dependent on the command type being executed.
*/
#define DBC_REG 0x24
/*
* For Block Move Instructions, DBC is a 24 bit quantity representing
* the number of bytes to transfer.
* For Transfer Control Instructions, DBC is bit fielded as follows :
*/
/* Bits 20 - 23 should be clear */
#define DBC_TCI_TRUE (1 << 19) /* Jump when true */
#define DBC_TCI_COMPARE_DATA (1 << 18) /* Compare data */
#define DBC_TCI_COMPARE_PHASE (1 << 17) /* Compare phase with DCMD field */
#define DBC_TCI_WAIT_FOR_VALID (1 << 16) /* Wait for REQ */
/* Bits 8 - 15 are reserved on some implementations ? */
#define DBC_TCI_MASK_MASK 0xff00 /* Mask for data compare */
#define DBC_TCI_MASK_SHIFT 8
#define DBC_TCI_DATA_MASK 0xff /* Data to be compared */
#define DBC_TCI_DATA_SHIFT 0
#define DBC_RWRI_IMMEDIATE_MASK 0xff00 /* Immediate data */
#define DBC_RWRI_IMMEDIATE_SHIFT 8 /* Amount to shift */
#define DBC_RWRI_ADDRESS_MASK 0x3f0000 /* Register address */
#define DBC_RWRI_ADDRESS_SHIFT 16
/*
* DMA command r/w
*/
#define DCMD_REG 0x27
#define DCMD_TYPE_MASK 0xc0 /* Masks off type */
#define DCMD_TYPE_BMI 0x00 /* Indicates a Block Move instruction */
#define DCMD_BMI_IO 0x01 /* I/O, CD, and MSG bits selecting */
#define DCMD_BMI_CD 0x02 /* the phase for the block MOVE */
#define DCMD_BMI_MSG 0x04 /* instruction */
#define DCMD_BMI_OP_MASK 0x18 /* mask for opcode */
#define DCMD_BMI_OP_MOVE_T 0x00 /* MOVE */
#define DCMD_BMI_OP_MOVE_I 0x08 /* MOVE Initiator */
#define DCMD_BMI_INDIRECT 0x20 /* Indirect addressing */
#define DCMD_TYPE_TCI 0x80 /* Indicates a Transfer Control
instruction */
#define DCMD_TCI_IO 0x01 /* I/O, CD, and MSG bits selecting */
#define DCMD_TCI_CD 0x02 /* the phase for the block MOVE */
#define DCMD_TCI_MSG 0x04 /* instruction */
#define DCMD_TCI_OP_MASK 0x38 /* mask for opcode */
#define DCMD_TCI_OP_JUMP 0x00 /* JUMP */
#define DCMD_TCI_OP_CALL 0x08 /* CALL */
#define DCMD_TCI_OP_RETURN 0x10 /* RETURN */
#define DCMD_TCI_OP_INT 0x18 /* INT */
#define DCMD_TYPE_RWRI 0x40 /* Indicates I/O or register Read/Write
instruction */
#define DCMD_RWRI_OPC_MASK 0x38 /* Opcode mask */
#define DCMD_RWRI_OPC_WRITE 0x28 /* Write SFBR to register */
#define DCMD_RWRI_OPC_READ 0x30 /* Read register to SFBR */
#define DCMD_RWRI_OPC_MODIFY 0x38 /* Modify in place */
#define DCMD_RWRI_OP_MASK 0x07
#define DCMD_RWRI_OP_MOVE 0x00
#define DCMD_RWRI_OP_SHL 0x01
#define DCMD_RWRI_OP_OR 0x02
#define DCMD_RWRI_OP_XOR 0x03
#define DCMD_RWRI_OP_AND 0x04
#define DCMD_RWRI_OP_SHR 0x05
#define DCMD_RWRI_OP_ADD 0x06
#define DCMD_RWRI_OP_ADDC 0x07
#define DCMD_TYPE_MMI 0xc0 /* Indicates a Memory Move instruction
(three words) */
#define DNAD_REG 0x28 /* through 0x2b DMA next address for
data */
#define DSP_REG 0x2c /* through 0x2f DMA SCRIPTS pointer rw */
#define DSPS_REG 0x30 /* through 0x33 DMA SCRIPTS pointer
save rw */
#define DMODE_REG_00 0x34 /* DMA mode rw */
#define DMODE_00_BL1 0x80 /* Burst length bits */
#define DMODE_00_BL0 0x40
#define DMODE_BL_MASK 0xc0
/* Burst lengths (800) */
#define DMODE_BL_2 0x00 /* 2 transfer */
#define DMODE_BL_4 0x40 /* 4 transfers */
#define DMODE_BL_8 0x80 /* 8 transfers */
#define DMODE_BL_16 0xc0 /* 16 transfers */
#define DMODE_10_BL_1 0x00 /* 1 transfer */
#define DMODE_10_BL_2 0x40 /* 2 transfers */
#define DMODE_10_BL_4 0x80 /* 4 transfers */
#define DMODE_10_BL_8 0xc0 /* 8 transfers */
#define DMODE_10_FC2 0x20 /* Driven to FC2 pin */
#define DMODE_10_FC1 0x10 /* Driven to FC1 pin */
#define DMODE_710_PD 0x08 /* Program/data on FC0 pin */
#define DMODE_710_UO 0x02 /* User prog. output */
#define DMODE_700_BW16 0x20 /* Host buswidth = 16 */
#define DMODE_700_286 0x10 /* 286 mode */
#define DMODE_700_IOM 0x08 /* Transfer to IO port */
#define DMODE_700_FAM 0x04 /* Fixed address mode */
#define DMODE_700_PIPE 0x02 /* Pipeline mode disables
* automatic fetch / exec
*/
#define DMODE_MAN 0x01 /* Manual start mode,
* requires a 1 to be written
* to the start DMA bit in the DCNTL
* register to run scripts
*/
#define DMODE_700_SAVE ( DMODE_00_BL_MASK | DMODE_00_BW16 | DMODE_00_286 )
/* NCR53c800 series only */
#define SCRATCHA_REG_800 0x34 /* through 0x37 Scratch A rw */
/* NCR53c710 only */
#define SCRATCHB_REG_10 0x34 /* through 0x37 scratch B rw */
#define DMODE_REG_10 0x38 /* DMA mode rw, NCR53c710 and newer */
#define DMODE_800_SIOM 0x20 /* Source IO = 1 */
#define DMODE_800_DIOM 0x10 /* Destination IO = 1 */
#define DMODE_800_ERL 0x08 /* Enable Read Line */
/* 35-38 are reserved on 700 and 700-66 series chips */
#define DIEN_REG 0x39 /* DMA interrupt enable rw */
/* 0x80, 0x40, and 0x20 are reserved on 700-series chips */
#define DIEN_800_MDPE 0x40 /* Master data parity error */
#define DIEN_800_BF 0x20 /* BUS fault */
#define DIEN_700_BF 0x20 /* BUS fault */
#define DIEN_ABRT 0x10 /* Enable aborted interrupt */
#define DIEN_SSI 0x08 /* Enable single step interrupt */
#define DIEN_SIR 0x04 /* Enable SCRIPTS INT command
* interrupt
*/
/* 0x02 is reserved on 800 series chips */
#define DIEN_700_WTD 0x02 /* Enable watchdog timeout interrupt */
#define DIEN_700_OPC 0x01 /* Enable illegal instruction
* interrupt
*/
#define DIEN_800_IID 0x01 /* Same meaning, different name */
/*
* DMA watchdog timer rw
* set in 16 CLK input periods.
*/
#define DWT_REG 0x3a
/* DMA control rw */
#define DCNTL_REG 0x3b
#define DCNTL_700_CF1 0x80 /* Clock divisor bits */
#define DCNTL_700_CF0 0x40
#define DCNTL_700_CF_MASK 0xc0
/* Clock divisors Divisor SCLK range (MHZ) */
#define DCNTL_700_CF_2 0x00 /* 2.0 37.51-50.00 */
#define DCNTL_700_CF_1_5 0x40 /* 1.5 25.01-37.50 */
#define DCNTL_700_CF_1 0x80 /* 1.0 16.67-25.00 */
#define DCNTL_700_CF_3 0xc0 /* 3.0 50.01-66.67 (53c700-66) */
#define DCNTL_700_S16 0x20 /* Load scripts 16 bits at a time */
#define DCNTL_SSM 0x10 /* Single step mode */
#define DCNTL_700_LLM 0x08 /* Low level mode, can only be set
* after selection */
#define DCNTL_800_IRQM 0x08 /* Totem pole IRQ pin */
#define DCNTL_STD 0x04 /* Start DMA / SCRIPTS */
/* 0x02 is reserved */
#define DCNTL_00_RST 0x01 /* Software reset, resets everything
* but 286 mode bit in DMODE. On the
* NCR53c710, this bit moved to CTEST8
*/
#define DCNTL_10_COM 0x01 /* 700 software compatibility mode */
#define DCNTL_10_EA 0x20 /* Enable Ack - needed for MVME16x */
#define DCNTL_700_SAVE ( DCNTL_CF_MASK | DCNTL_S16)
/* NCR53c700-66 only */
#define SCRATCHB_REG_00 0x3c /* through 0x3f scratch b rw */
#define SCRATCHB_REG_800 0x5c /* through 0x5f scratch b rw */
/* NCR53c710 only */
#define ADDER_REG_10 0x3c /* Adder, NCR53c710 only */
#define SIEN1_REG_800 0x41
#define SIEN1_800_STO 0x04 /* selection/reselection timeout */
#define SIEN1_800_GEN 0x02 /* general purpose timer */
#define SIEN1_800_HTH 0x01 /* handshake to handshake */
#define SIST1_REG_800 0x43
#define SIST1_800_STO 0x04 /* selection/reselection timeout */
#define SIST1_800_GEN 0x02 /* general purpose timer */
#define SIST1_800_HTH 0x01 /* handshake to handshake */
#define SLPAR_REG_800 0x44 /* Parity */
#define MACNTL_REG_800 0x46 /* Memory access control */
#define MACNTL_800_TYP3 0x80
#define MACNTL_800_TYP2 0x40
#define MACNTL_800_TYP1 0x20
#define MACNTL_800_TYP0 0x10
#define MACNTL_800_DWR 0x08
#define MACNTL_800_DRD 0x04
#define MACNTL_800_PSCPT 0x02
#define MACNTL_800_SCPTS 0x01
#define GPCNTL_REG_800 0x47 /* General Purpose Pin Control */
/* Timeouts are expressed such that 0=off, 1=100us, doubling after that */
#define STIME0_REG_800 0x48 /* SCSI Timer Register 0 */
#define STIME0_800_HTH_MASK 0xf0 /* Handshake to Handshake timeout */
#define STIME0_800_HTH_SHIFT 4
#define STIME0_800_SEL_MASK 0x0f /* Selection timeout */
#define STIME0_800_SEL_SHIFT 0
#define STIME1_REG_800 0x49
#define STIME1_800_GEN_MASK 0x0f /* General purpose timer */
#define RESPID_REG_800 0x4a /* Response ID, bit fielded. 8
bits on narrow chips, 16 on WIDE */
#define STEST0_REG_800 0x4c
#define STEST0_800_SLT 0x08 /* Selection response logic test */
#define STEST0_800_ART 0x04 /* Arbitration priority encoder test */
#define STEST0_800_SOZ 0x02 /* Synchronous offset zero */
#define STEST0_800_SOM 0x01 /* Synchronous offset maximum */
#define STEST1_REG_800 0x4d
#define STEST1_800_SCLK 0x80 /* Disable SCSI clock */
#define STEST2_REG_800 0x4e
#define STEST2_800_SCE 0x80 /* Enable SOCL/SODL */
#define STEST2_800_ROF 0x40 /* Reset SCSI sync offset */
#define STEST2_800_SLB 0x10 /* Enable SCSI loopback mode */
#define STEST2_800_SZM 0x08 /* SCSI high impedance mode */
#define STEST2_800_EXT 0x02 /* Extend REQ/ACK filter 30 to 60ns */
#define STEST2_800_LOW 0x01 /* SCSI low level mode */
#define STEST3_REG_800 0x4f
#define STEST3_800_TE 0x80 /* Enable active negation */
#define STEST3_800_STR 0x40 /* SCSI FIFO test read */
#define STEST3_800_HSC 0x20 /* Halt SCSI clock */
#define STEST3_800_DSI 0x10 /* Disable single initiator response */
#define STEST3_800_TTM 0x04 /* Time test mode */
#define STEST3_800_CSF 0x02 /* Clear SCSI FIFO */
#define STEST3_800_STW 0x01 /* SCSI FIFO test write */
#define OPTION_PARITY 0x1 /* Enable parity checking */
#define OPTION_TAGGED_QUEUE 0x2 /* Enable SCSI-II tagged queuing */
#define OPTION_700 0x8 /* Always run NCR53c700 scripts */
#define OPTION_INTFLY 0x10 /* Use INTFLY interrupts */
#define OPTION_DEBUG_INTR 0x20 /* Debug interrupts */
#define OPTION_DEBUG_INIT_ONLY 0x40 /* Run initialization code and
simple test code, return
DID_NO_CONNECT if any SCSI
commands are attempted. */
#define OPTION_DEBUG_READ_ONLY 0x80 /* Return DID_ERROR if any
SCSI write is attempted */
#define OPTION_DEBUG_TRACE 0x100 /* Animated trace mode, print
each address and instruction
executed to debug buffer. */
#define OPTION_DEBUG_SINGLE 0x200 /* stop after executing one
instruction */
#define OPTION_SYNCHRONOUS 0x400 /* Enable sync SCSI. */
#define OPTION_MEMORY_MAPPED 0x800 /* NCR registers have valid
memory mapping */
#define OPTION_IO_MAPPED 0x1000 /* NCR registers have valid
I/O mapping */
#define OPTION_DEBUG_PROBE_ONLY 0x2000 /* Probe only, don't even init */
#define OPTION_DEBUG_TESTS_ONLY 0x4000 /* Probe, init, run selected tests */
#define OPTION_DEBUG_TEST0 0x08000 /* Run test 0 */
#define OPTION_DEBUG_TEST1 0x10000 /* Run test 1 */
#define OPTION_DEBUG_TEST2 0x20000 /* Run test 2 */
#define OPTION_DEBUG_DUMP 0x40000 /* Dump commands */
#define OPTION_DEBUG_TARGET_LIMIT 0x80000 /* Only talk to target+luns specified */
#define OPTION_DEBUG_NCOMMANDS_LIMIT 0x100000 /* Limit the number of commands */
#define OPTION_DEBUG_SCRIPT 0x200000 /* Print when checkpoints are passed */
#define OPTION_DEBUG_FIXUP 0x400000 /* print fixup values */
#define OPTION_DEBUG_DSA 0x800000
#define OPTION_DEBUG_CORRUPTION 0x1000000 /* Detect script corruption */
#define OPTION_DEBUG_SDTR 0x2000000 /* Debug SDTR problem */
#define OPTION_DEBUG_MISMATCH 0x4000000 /* Debug phase mismatches */
#define OPTION_DISCONNECT 0x8000000 /* Allow disconnect */
#define OPTION_DEBUG_DISCONNECT 0x10000000
#define OPTION_ALWAYS_SYNCHRONOUS 0x20000000 /* Negotiate sync. transfers
on power up */
#define OPTION_DEBUG_QUEUES 0x80000000
#define OPTION_DEBUG_ALLOCATION 0x100000000LL
#define OPTION_DEBUG_SYNCHRONOUS 0x200000000LL /* Sanity check SXFER and
SCNTL3 registers */
#define OPTION_NO_ASYNC 0x400000000LL /* Don't automagically send
SDTR for async transfers when
we haven't been told to do
a synchronous transfer. */
#define OPTION_NO_PRINT_RACE 0x800000000LL /* Don't print message when
the reselect/WAIT DISCONNECT
race condition hits */
#if !defined(PERM_OPTIONS)
#define PERM_OPTIONS 0
#endif
/*
* Some data which is accessed by the NCR chip must be 4-byte aligned.
* For some hosts the default is less than that (eg. 68K uses 2-byte).
* Alignment has only been forced where it is important; also if one
* 32 bit structure field is aligned then it is assumed that following
* 32 bit fields are also aligned. Take care when adding fields
* which are other than 32 bit.
*/
struct NCR53c7x0_synchronous {
u32 select_indirect /* Value used for indirect selection */
__attribute__ ((aligned (4)));
u32 sscf_710; /* Used to set SSCF bits for 710 */
u32 script[8]; /* Size ?? Script used when target is
reselected */
unsigned char synchronous_want[5]; /* Per target desired SDTR */
/*
* Set_synchronous programs these, select_indirect and current settings after
* int_debug_should show a match.
*/
unsigned char sxfer_sanity, scntl3_sanity;
};
#define CMD_FLAG_SDTR 1 /* Initiating synchronous
transfer negotiation */
#define CMD_FLAG_WDTR 2 /* Initiating wide transfer
negotiation */
#define CMD_FLAG_DID_SDTR 4 /* did SDTR */
#define CMD_FLAG_DID_WDTR 8 /* did WDTR */
struct NCR53c7x0_table_indirect {
u32 count;
void *address;
};
enum ncr_event {
EVENT_NONE = 0,
/*
* Order is IMPORTANT, since these must correspond to the event interrupts
* in 53c7,8xx.scr
*/
EVENT_ISSUE_QUEUE = 0x5000000, /* 0 Command was added to issue queue */
EVENT_START_QUEUE, /* 1 Command moved to start queue */
EVENT_SELECT, /* 2 Command completed selection */
EVENT_DISCONNECT, /* 3 Command disconnected */
EVENT_RESELECT, /* 4 Command reselected */
EVENT_COMPLETE, /* 5 Command completed */
EVENT_IDLE, /* 6 */
EVENT_SELECT_FAILED, /* 7 */
EVENT_BEFORE_SELECT, /* 8 */
EVENT_RESELECT_FAILED /* 9 */
};
struct NCR53c7x0_event {
enum ncr_event event; /* What type of event */
unsigned char target;
unsigned char lun;
struct timeval time;
u32 *dsa; /* What's in the DSA register now (virt) */
/*
* A few things from that SCSI pid so we know what happened after
* the Scsi_Cmnd structure in question may have disappeared.
*/
unsigned long pid; /* The SCSI PID which caused this
event */
unsigned char cmnd[12];
};
/*
* Things in the NCR53c7x0_cmd structure are split into two parts :
*
* 1. A fixed portion, for things which are not accessed directly by static NCR
* code (ie, are referenced only by the Linux side of the driver,
* or only by dynamically generated code).
*
* 2. The DSA portion, for things which are accessed directly by static NCR
* code.
*
* This is a little ugly, but it
* 1. Avoids conflicts between the NCR code's picture of the structure, and
* Linux code's idea of what it looks like.
*
* 2. Minimizes the pain in the Linux side of the code needed
* to calculate real dsa locations for things, etc.
*
*/
struct NCR53c7x0_cmd {
void *real; /* Real, unaligned address for
free function */
void (* free)(void *, int); /* Command to deallocate; NULL
for structures allocated with
scsi_register, etc. */
Scsi_Cmnd *cmd; /* Associated Scsi_Cmnd
structure, Scsi_Cmnd points
at NCR53c7x0_cmd using
host_scribble structure */
int size; /* scsi_malloc'd size of this
structure */
int flags; /* CMD_* flags */
unsigned char cmnd[12]; /* CDB, copied from Scsi_Cmnd */
int result; /* Copy to Scsi_Cmnd when done */
struct { /* Private non-cached bounce buffer */
unsigned char buf[256];
u32 addr;
u32 len;
} bounce;
/*
* SDTR and WIDE messages are an either/or affair
* in this message, since we will go into message out and send
* _the whole mess_ without dropping out of message out to
* let the target go into message in after sending the first
* message.
*/
unsigned char select[11]; /* Select message, includes
IDENTIFY
(optional) QUEUE TAG
(optional) SDTR or WDTR
*/
volatile struct NCR53c7x0_cmd *next; /* Linux maintained lists (free,
running, eventually finished */
u32 *data_transfer_start; /* Start of data transfer routines */
u32 *data_transfer_end; /* Address after end of data transfer o
routines */
/*
* The following three fields were moved from the DSA proper to here
* since only dynamically generated NCR code refers to them, meaning
* we don't need dsa_* absolutes, and it is simpler to let the
* host code refer to them directly.
*/
/*
* HARD CODED : residual and saved_residual need to agree with the sizes
* used in NCR53c7,8xx.scr.
*
* FIXME: we want to consider the case where we have odd-length
* scatter/gather buffers and a WIDE transfer, in which case
* we'll need to use the CHAIN MOVE instruction. Ick.
*/
u32 residual[6] __attribute__ ((aligned (4)));
/* Residual data transfer which
allows pointer code to work
right.
[0-1] : Conditional call to
appropriate other transfer
routine.
[2-3] : Residual block transfer
instruction.
[4-5] : Jump to instruction
after splice.
*/
u32 saved_residual[6]; /* Copy of old residual, so we
can get another partial
transfer and still recover
*/
u32 saved_data_pointer; /* Saved data pointer */
u32 dsa_next_addr; /* _Address_ of dsa_next field
in this dsa for RISCy
style constant. */
u32 dsa_addr; /* Address of dsa; RISCy style
constant */
u32 dsa[0]; /* Variable length (depending
on host type, number of scatter /
gather buffers, etc). */
};
struct NCR53c7x0_break {
u32 *address, old_instruction[2];
struct NCR53c7x0_break *next;
unsigned char old_size; /* Size of old instruction */
};
/* Indicates that the NCR is not executing code */
#define STATE_HALTED 0
/*
* Indicates that the NCR is executing the wait for select / reselect
* script. Only used when running NCR53c700 compatible scripts, only
* state during which an ABORT is _not_ considered an error condition.
*/
#define STATE_WAITING 1
/* Indicates that the NCR is executing other code. */
#define STATE_RUNNING 2
/*
* Indicates that the NCR was being aborted.
*/
#define STATE_ABORTING 3
/* Indicates that the NCR was successfully aborted. */
#define STATE_ABORTED 4
/* Indicates that the NCR has been disabled due to a fatal error */
#define STATE_DISABLED 5
/*
* Where knowledge of SCSI SCRIPT(tm) specified values are needed
* in an interrupt handler, an interrupt handler exists for each
* different SCSI script so we don't have name space problems.
*
* Return values of these handlers are as follows :
*/
#define SPECIFIC_INT_NOTHING 0 /* don't even restart */
#define SPECIFIC_INT_RESTART 1 /* restart at the next instruction */
#define SPECIFIC_INT_ABORT 2 /* recoverable error, abort cmd */
#define SPECIFIC_INT_PANIC 3 /* unrecoverable error, panic */
#define SPECIFIC_INT_DONE 4 /* normal command completion */
#define SPECIFIC_INT_BREAK 5 /* break point encountered */
struct NCR53c7x0_hostdata {
int size; /* Size of entire Scsi_Host
structure */
int board; /* set to board type, useful if
we have host specific things,
ie, a general purpose I/O
bit is being used to enable
termination, etc. */
int chip; /* set to chip type; 700-66 is
700-66, rest are last three
digits of part number */
char valid_ids[8]; /* Valid SCSI ID's for adapter */
u32 *dsp; /* dsp to restart with after
all stacked interrupts are
handled. */
unsigned dsp_changed:1; /* Has dsp changed within this
set of stacked interrupts ? */
unsigned char dstat; /* Most recent value of dstat */
unsigned dstat_valid:1;
unsigned expecting_iid:1; /* Expect IID interrupt */
unsigned expecting_sto:1; /* Expect STO interrupt */
/*
* The code stays cleaner if we use variables with function
* pointers and offsets that are unique for the different
* scripts rather than having a slew of switch(hostdata->chip)
* statements.
*
* It also means that the #defines from the SCSI SCRIPTS(tm)
* don't have to be visible outside of the script-specific
* instructions, preventing name space pollution.
*/
void (* init_fixup)(struct Scsi_Host *host);
void (* init_save_regs)(struct Scsi_Host *host);
void (* dsa_fixup)(struct NCR53c7x0_cmd *cmd);
void (* soft_reset)(struct Scsi_Host *host);
int (* run_tests)(struct Scsi_Host *host);
/*
* Called when DSTAT_SIR is set, indicating an interrupt generated
* by the INT instruction, where values are unique for each SCSI
* script. Should return one of the SPEC_* values.
*/
int (* dstat_sir_intr)(struct Scsi_Host *host, struct NCR53c7x0_cmd *cmd);
int dsa_len; /* Size of DSA structure */
/*
* Location of DSA fields for the SCSI SCRIPT corresponding to this
* chip.
*/
s32 dsa_start;
s32 dsa_end;
s32 dsa_next;
s32 dsa_prev;
s32 dsa_cmnd;
s32 dsa_select;
s32 dsa_msgout;
s32 dsa_cmdout;
s32 dsa_dataout;
s32 dsa_datain;
s32 dsa_msgin;
s32 dsa_msgout_other;
s32 dsa_write_sync;
s32 dsa_write_resume;
s32 dsa_check_reselect;
s32 dsa_status;
s32 dsa_saved_pointer;
s32 dsa_jump_dest;
/*
* Important entry points that generic fixup code needs
* to know about, fixed up.
*/
s32 E_accept_message;
s32 E_command_complete;
s32 E_data_transfer;
s32 E_dsa_code_template;
s32 E_dsa_code_template_end;
s32 E_end_data_transfer;
s32 E_msg_in;
s32 E_initiator_abort;
s32 E_other_transfer;
s32 E_other_in;
s32 E_other_out;
s32 E_target_abort;
s32 E_debug_break;
s32 E_reject_message;
s32 E_respond_message;
s32 E_select;
s32 E_select_msgout;
s32 E_test_0;
s32 E_test_1;
s32 E_test_2;
s32 E_test_3;
s32 E_dsa_zero;
s32 E_cmdout_cmdout;
s32 E_wait_reselect;
s32 E_dsa_code_begin;
long long options; /* Bitfielded set of options enabled */
volatile u32 test_completed; /* Test completed */
int test_running; /* Test currently running */
s32 test_source
__attribute__ ((aligned (4)));
volatile s32 test_dest;
volatile int state; /* state of driver, only used for
OPTION_700 */
unsigned char dmode; /*
* set to the address of the DMODE
* register for this chip.
*/
unsigned char istat; /*
* set to the address of the ISTAT
* register for this chip.
*/
int scsi_clock; /*
* SCSI clock in HZ. 0 may be used
* for unknown, although this will
* disable synchronous negotiation.
*/
volatile int intrs; /* Number of interrupts */
volatile int resets; /* Number of SCSI resets */
unsigned char saved_dmode;
unsigned char saved_ctest4;
unsigned char saved_ctest7;
unsigned char saved_dcntl;
unsigned char saved_scntl3;
unsigned char this_id_mask;
/* Debugger information */
struct NCR53c7x0_break *breakpoints, /* Linked list of all break points */
*breakpoint_current; /* Current breakpoint being stepped
through, NULL if we are running
normally. */
#ifdef NCR_DEBUG
int debug_size; /* Size of debug buffer */
volatile int debug_count; /* Current data count */
volatile char *debug_buf; /* Output ring buffer */
volatile char *debug_write; /* Current write pointer */
volatile char *debug_read; /* Current read pointer */
#endif /* def NCR_DEBUG */
/* XXX - primitive debugging junk, remove when working ? */
int debug_print_limit; /* Number of commands to print
out exhaustive debugging
information for if
OPTION_DEBUG_DUMP is set */
unsigned char debug_lun_limit[16]; /* If OPTION_DEBUG_TARGET_LIMIT
set, puke if commands are sent
to other target/lun combinations */
int debug_count_limit; /* Number of commands to execute
before puking to limit debugging
output */
volatile unsigned idle:1; /* set to 1 if idle */
/*
* Table of synchronous+wide transfer parameters set on a per-target
* basis.
*/
volatile struct NCR53c7x0_synchronous sync[16]
__attribute__ ((aligned (4)));
volatile Scsi_Cmnd *issue_queue
__attribute__ ((aligned (4)));
/* waiting to be issued by
Linux driver */
volatile struct NCR53c7x0_cmd *running_list;
/* commands running, maintained
by Linux driver */
volatile struct NCR53c7x0_cmd *ncrcurrent; /* currently connected
nexus, ONLY valid for
NCR53c700/NCR53c700-66
*/
volatile struct NCR53c7x0_cmd *spare; /* pointer to spare,
allocated at probe time,
which we can use for
initialization */
volatile struct NCR53c7x0_cmd *free;
int max_cmd_size; /* Maximum size of NCR53c7x0_cmd
based on number of
scatter/gather segments, etc.
*/
volatile int num_cmds; /* Number of commands
allocated */
volatile int extra_allocate;
volatile unsigned char cmd_allocated[16]; /* Have we allocated commands
for this target yet? If not,
do so ASAP */
volatile unsigned char busy[16][8]; /* number of commands
executing on each target
*/
/*
* Eventually, I'll switch to a coroutine for calling
* cmd->done(cmd), etc. so that we can overlap interrupt
* processing with this code for maximum performance.
*/
volatile struct NCR53c7x0_cmd *finished_queue;
/* Shared variables between SCRIPT and host driver */
volatile u32 *schedule
__attribute__ ((aligned (4))); /* Array of JUMPs to dsa_begin
routines of various DSAs.
When not in use, replace
with jump to next slot */
volatile unsigned char msg_buf[16]; /* buffer for messages
other than the command
complete message */
/* Per-target default synchronous and WIDE messages */
volatile unsigned char synchronous_want[16][5];
volatile unsigned char wide_want[16][4];
/* Bit fielded set of targets we want to speak synchronously with */
volatile u16 initiate_sdtr;
/* Bit fielded set of targets we want to speak wide with */
volatile u16 initiate_wdtr;
/* Bit fielded list of targets we've talked to. */
volatile u16 talked_to;
/* Array of bit-fielded lun lists that we need to request_sense */
volatile unsigned char request_sense[16];
u32 addr_reconnect_dsa_head
__attribute__ ((aligned (4))); /* RISCy style constant,
address of following */
volatile u32 reconnect_dsa_head;
/* Data identifying nexus we are trying to match during reselection */
volatile unsigned char reselected_identify; /* IDENTIFY message */
volatile unsigned char reselected_tag; /* second byte of queue tag
message or 0 */
/* These were static variables before we moved them */
s32 NCR53c7xx_zero
__attribute__ ((aligned (4)));
s32 NCR53c7xx_sink;
u32 NOP_insn;
char NCR53c7xx_msg_reject;
char NCR53c7xx_msg_abort;
char NCR53c7xx_msg_nop;
/*
* Following item introduced by RGH to support NCRc710, which is
* VERY brain-dead when it come to memory moves
*/
/* DSA save area used only by the NCR chip */
volatile unsigned long saved2_dsa
__attribute__ ((aligned (4)));
volatile unsigned long emulated_intfly
__attribute__ ((aligned (4)));
volatile int event_size, event_index;
volatile struct NCR53c7x0_event *events;
/* If we need to generate code to kill off the currently connected
command, this is where we do it. Should have a BMI instruction
to source or sink the current data, followed by a JUMP
to abort_connected */
u32 *abort_script;
int script_count; /* Size of script in words */
u32 script[0]; /* Relocated SCSI script */
};
#define SCSI_IRQ_NONE 255
#define DMA_NONE 255
#define IRQ_AUTO 254
#define DMA_AUTO 254
#define BOARD_GENERIC 0
#define NCR53c7x0_insn_size(insn) \
(((insn) & DCMD_TYPE_MASK) == DCMD_TYPE_MMI ? 3 : 2)
#define NCR53c7x0_local_declare() \
volatile unsigned char *NCR53c7x0_address_memory; \
unsigned int NCR53c7x0_address_io; \
int NCR53c7x0_memory_mapped
#define NCR53c7x0_local_setup(host) \
NCR53c7x0_address_memory = (void *) (host)->base; \
NCR53c7x0_address_io = (unsigned int) (host)->io_port; \
NCR53c7x0_memory_mapped = ((struct NCR53c7x0_hostdata *) \
host->hostdata[0])-> options & OPTION_MEMORY_MAPPED
#ifdef BIG_ENDIAN
/* These could be more efficient, given that we are always memory mapped,
* but they don't give the same problems as the write macros, so leave
* them. */
#ifdef __mc68000__
#define NCR53c7x0_read8(address) \
((unsigned int)raw_inb((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) )
#define NCR53c7x0_read16(address) \
((unsigned int)raw_inw((u32)NCR53c7x0_address_memory + ((u32)(address)^2)))
#else
#define NCR53c7x0_read8(address) \
(NCR53c7x0_memory_mapped ? \
(unsigned int)readb((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) : \
inb(NCR53c7x0_address_io + (address)))
#define NCR53c7x0_read16(address) \
(NCR53c7x0_memory_mapped ? \
(unsigned int)readw((u32)NCR53c7x0_address_memory + ((u32)(address)^2)) : \
inw(NCR53c7x0_address_io + (address)))
#endif /* mc68000 */
#else
#define NCR53c7x0_read8(address) \
(NCR53c7x0_memory_mapped ? \
(unsigned int)readb((u32)NCR53c7x0_address_memory + (u32)(address)) : \
inb(NCR53c7x0_address_io + (address)))
#define NCR53c7x0_read16(address) \
(NCR53c7x0_memory_mapped ? \
(unsigned int)readw((u32)NCR53c7x0_address_memory + (u32)(address)) : \
inw(NCR53c7x0_address_io + (address)))
#endif
#ifdef __mc68000__
#define NCR53c7x0_read32(address) \
((unsigned int) raw_inl((u32)NCR53c7x0_address_memory + (u32)(address)))
#else
#define NCR53c7x0_read32(address) \
(NCR53c7x0_memory_mapped ? \
(unsigned int) readl((u32)NCR53c7x0_address_memory + (u32)(address)) : \
inl(NCR53c7x0_address_io + (address)))
#endif /* mc68000*/
#ifdef BIG_ENDIAN
/* If we are big-endian, then we are not Intel, so probably don't have
* an i/o map as well as a memory map. So, let's assume memory mapped.
* Also, I am having terrible problems trying to persuade the compiler
* not to lay down code which does a read after write for these macros.
* If you remove 'volatile' from writeb() and friends it is ok....
*/
#define NCR53c7x0_write8(address,value) \
*(volatile unsigned char *) \
((u32)NCR53c7x0_address_memory + ((u32)(address)^3)) = (value)
#define NCR53c7x0_write16(address,value) \
*(volatile unsigned short *) \
((u32)NCR53c7x0_address_memory + ((u32)(address)^2)) = (value)
#define NCR53c7x0_write32(address,value) \
*(volatile unsigned long *) \
((u32)NCR53c7x0_address_memory + ((u32)(address))) = (value)
#else
#define NCR53c7x0_write8(address,value) \
(NCR53c7x0_memory_mapped ? \
({writeb((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \
outb((value), NCR53c7x0_address_io + (address)))
#define NCR53c7x0_write16(address,value) \
(NCR53c7x0_memory_mapped ? \
({writew((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \
outw((value), NCR53c7x0_address_io + (address)))
#define NCR53c7x0_write32(address,value) \
(NCR53c7x0_memory_mapped ? \
({writel((value), (u32)NCR53c7x0_address_memory + (u32)(address)); mb();}) : \
outl((value), NCR53c7x0_address_io + (address)))
#endif
/* Patch arbitrary 32 bit words in the script */
#define patch_abs_32(script, offset, symbol, value) \
for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
(u32)); ++i) { \
(script)[A_##symbol##_used[i] - (offset)] += (value); \
if (hostdata->options & OPTION_DEBUG_FIXUP) \
printk("scsi%d : %s reference %d at 0x%x in %s is now 0x%x\n",\
host->host_no, #symbol, i, A_##symbol##_used[i] - \
(int)(offset), #script, (script)[A_##symbol##_used[i] - \
(offset)]); \
}
/* Patch read/write instruction immediate field */
#define patch_abs_rwri_data(script, offset, symbol, value) \
for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
(u32)); ++i) \
(script)[A_##symbol##_used[i] - (offset)] = \
((script)[A_##symbol##_used[i] - (offset)] & \
~DBC_RWRI_IMMEDIATE_MASK) | \
(((value) << DBC_RWRI_IMMEDIATE_SHIFT) & \
DBC_RWRI_IMMEDIATE_MASK)
/* Patch transfer control instruction data field */
#define patch_abs_tci_data(script, offset, symbol, value) \
for (i = 0; i < (sizeof (A_##symbol##_used) / sizeof \
(u32)); ++i) \
(script)[A_##symbol##_used[i] - (offset)] = \
((script)[A_##symbol##_used[i] - (offset)] & \
~DBC_TCI_DATA_MASK) | \
(((value) << DBC_TCI_DATA_SHIFT) & \
DBC_TCI_DATA_MASK)
/* Patch field in dsa structure (assignment should be +=?) */
#define patch_dsa_32(dsa, symbol, word, value) \
{ \
(dsa)[(hostdata->##symbol - hostdata->dsa_start) / sizeof(u32) \
+ (word)] = (value); \
if (hostdata->options & OPTION_DEBUG_DSA) \
printk("scsi : dsa %s symbol %s(%d) word %d now 0x%x\n", \
#dsa, #symbol, hostdata->##symbol, \
(word), (u32) (value)); \
}
/* Paranoid people could use panic() here. */
#define FATAL(host) shutdown((host));
extern int ncr53c7xx_init(Scsi_Host_Template *tpnt, int board, int chip,
unsigned long base, int io_port, int irq, int dma,
long long options, int clock);
#endif /* NCR53c710_C */
#endif /* NCR53c710_H */
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