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+/*
+ * 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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