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[/] [or1k/] [trunk/] [rc203soc/] [sw/] [uClinux/] [drivers/] [scsi/] [53c7,8xx.h] - Rev 1777
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/* * 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 NCR53c7x0_H #define NCR53c7x0_H #if !defined(LINUX_1_2) && !defined(LINUX_1_3) #include <linux/version.h> #if LINUX_VERSION_CODE > 65536 + 3 * 256 #define LINUX_1_3 #else #define LINUX_1_2 #endif #endif /* * Prevent name space pollution in hosts.c, and only provide the * define we need to get the NCR53c7x0 driver into the host template * array. */ #if defined(HOSTS_C) || defined(MODULE) #include <scsi/scsicam.h> extern int NCR53c7xx_abort(Scsi_Cmnd *); extern int NCR53c7xx_detect(Scsi_Host_Template *tpnt); extern int NCR53c7xx_queue_command(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *)); extern int NCR53c7xx_reset(Scsi_Cmnd *, unsigned int); #ifdef MODULE extern int NCR53c7xx_release(struct Scsi_Host *); #else #define NCR53c7xx_release NULL #endif #ifdef LINUX_1_2 #define NCR53c7xx {NULL, NULL, "NCR53c{7,8}xx (rel 17)", NCR53c7xx_detect,\ NULL, /* info */ NULL, /* command, deprecated */ NULL, \ NCR53c7xx_queue_command, NCR53c7xx_abort, NCR53c7xx_reset, \ NULL /* slave attach */, scsicam_bios_param, /* can queue */ 24, \ /* id */ 7, 127 /* old SG_ALL */, /* cmd per lun */ 3, \ /* present */ 0, /* unchecked isa dma */ 0, DISABLE_CLUSTERING} #else #define NCR53c7xx {NULL, NULL, NULL, NULL, \ "NCR53c{7,8}xx (rel 17)", NCR53c7xx_detect,\ NULL, /* info */ NULL, /* command, deprecated */ NULL, \ NCR53c7xx_queue_command, NCR53c7xx_abort, NCR53c7xx_reset, \ NULL /* slave attach */, scsicam_bios_param, /* can queue */ 24, \ /* id */ 7, 127 /* old SG_ALL */, /* cmd per lun */ 3, \ /* present */ 0, /* unchecked isa dma */ 0, DISABLE_CLUSTERING} #endif #endif /* defined(HOSTS_C) || defined(MODULE) */ #ifndef HOSTS_C #ifdef LINUX_1_2 /* * Change virtual addresses to physical addresses and vv. * These are trivial on the 1:1 Linux/i386 mapping (but if we ever * make the kernel segment mapped at 0, we need to do translation * on the i386 as well) */ extern inline unsigned long virt_to_phys(volatile void * address) { return (unsigned long) address; } extern inline void * phys_to_virt(unsigned long address) { return (void *) address; } /* * IO bus memory addresses are also 1:1 with the physical address */ #define virt_to_bus virt_to_phys #define bus_to_virt phys_to_virt /* * readX/writeX() are used to access memory mapped devices. On some * architectures the memory mapped IO stuff needs to be accessed * differently. On the x86 architecture, we just read/write the * memory location directly. */ #define readb(addr) (*(volatile unsigned char *) (addr)) #define readw(addr) (*(volatile unsigned short *) (addr)) #define readl(addr) (*(volatile unsigned int *) (addr)) #define writeb(b,addr) ((*(volatile unsigned char *) (addr)) = (b)) #define writew(b,addr) ((*(volatile unsigned short *) (addr)) = (b)) #define writel(b,addr) ((*(volatile unsigned int *) (addr)) = (b)) #define mb() #endif /* def LINUX_1_2 */ /* Register addresses, ordered numerically */ /* 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 SBCL_REG 0x0b #define SBCL_REQ 0x80 /* REQ */ #define SBCL_ACK 0x40 /* ACK */ #define SBCL_BSY 0x20 /* BSY */ #define SBCL_SEL 0x10 /* SEL */ #define SBCL_ATN 0x08 /* ATN */ #define SBCL_MSG 0x04 /* MSG */ #define SBCL_CD 0x02 /* C/D */ #define SBCL_IO 0x01 /* I/O */ #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) /* * 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 SOCL_REG 0x0b #define SOCL_REQ 0x80 /* REQ ro */ #define SOCL_ACK 0x40 /* ACK ro */ #define SOCL_BSY 0x20 /* BSY ro */ #define SOCL_SEL 0x10 /* SEL ro */ #define SOCL_ATN 0x08 /* ATN ro */ #define SOCL_MSG 0x04 /* MSG ro */ #define SOCL_CD 0x02 /* C/D ro */ #define SOCL_IO 0x01 /* I/O ro */ /* * 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_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 SCRATCB_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_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_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 struct NCR53c7x0_synchronous { u32 select_indirect; /* Value used for indirect selection */ 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, /* Command was added to issue queue */ EVENT_START_QUEUE, /* Command moved to start queue */ EVENT_SELECT, /* Command completed selection */ EVENT_DISCONNECT, /* Command disconnected */ EVENT_RESELECT, /* Command reselected */ EVENT_COMPLETE, /* Command completed */ EVENT_IDLE, EVENT_SELECT_FAILED, EVENT_BEFORE_SELECT, EVENT_RESELECT_FAILED }; 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 */ /* * 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]; /* 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 */ /* * PCI bus, device, function, only for NCR53c8x0 chips. * pci_valid indicates that the PCI configuration information * is valid, and we can twiddle MAX_LAT, etc. as recommended * for maximum performance in the NCR documentation. */ unsigned char pci_bus, pci_device_fn; unsigned pci_valid:1; 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; 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]; volatile Scsi_Cmnd *issue_queue; /* waiting to be issued by Linux driver */ volatile struct NCR53c7x0_cmd *running_list; /* commands running, maintained by Linux driver */ volatile struct NCR53c7x0_cmd *current; /* 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; /* 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; /* 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; s32 NCR53c7xx_sink; u32 NOP_insn; char NCR53c7xx_msg_reject; char NCR53c7xx_msg_abort; char NCR53c7xx_msg_nop; 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 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)-> options & OPTION_MEMORY_MAPPED #define NCR53c7x0_read8(address) \ (NCR53c7x0_memory_mapped ? \ (unsigned int)readb(NCR53c7x0_address_memory + (address)) : \ inb(NCR53c7x0_address_io + (address))) #define NCR53c7x0_read16(address) \ (NCR53c7x0_memory_mapped ? \ (unsigned int)readw(NCR53c7x0_address_memory + (address)) : \ inw(NCR53c7x0_address_io + (address))) #define NCR53c7x0_read32(address) \ (NCR53c7x0_memory_mapped ? \ (unsigned int) readl(NCR53c7x0_address_memory + (address)) : \ inl(NCR53c7x0_address_io + (address))) #define NCR53c7x0_write8(address,value) \ (NCR53c7x0_memory_mapped ? \ ({writeb((value), NCR53c7x0_address_memory + (address)); mb();}) : \ outb((value), NCR53c7x0_address_io + (address))) #define NCR53c7x0_write16(address,value) \ (NCR53c7x0_memory_mapped ? \ ({writew((value), NCR53c7x0_address_memory + (address)); mb();}) : \ outw((value), NCR53c7x0_address_io + (address))) #define NCR53c7x0_write32(address,value) \ (NCR53c7x0_memory_mapped ? \ ({writel((value), NCR53c7x0_address_memory + (address)); mb();}) : \ outl((value), NCR53c7x0_address_io + (address))) /* 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)); #endif /* NCR53c7x0_C */ #endif /* NCR53c7x0_H */
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