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/* AM53/79C974 (PCscsi) driver release 0.5
*
* The architecture and much of the code of this device
* driver was originally developed by Drew Eckhardt for
* the NCR5380. The following copyrights apply:
* For the architecture and all parts similar to the NCR5380:
* Copyright 1993, Drew Eckhardt
* Visionary Computing
* (Unix and Linux consulting and custom programming)
* drew@colorado.edu
* +1 (303) 666-5836
*
* The AM53C974_nobios_detect code was originally developed by
* Robin Cutshaw (robin@xfree86.org) and is used here in a
* modified form.
*
* For the other parts:
* Copyright 1994, D. Frieauff
* EMail: fri@rsx42sun0.dofn.de
* Phone: x49-7545-8-2256 , x49-7541-42305
*/
/*
* $Log: AM53C974.h,v $
*/
#ifndef AM53C974_H
#define AM53C974_H
#include <scsi/scsicam.h>
/***************************************************************************************
* Default setting of the controller's SCSI id. Edit and uncomment this only if your *
* BIOS does not correctly initialize the controller's SCSI id. *
* If you don't get a warning during boot, it is correctly initialized. *
****************************************************************************************/
/* #define AM53C974_SCSI_ID 7 */
/***************************************************************************************
* Default settings for sync. negotiation enable, transfer rate and sync. offset. *
* These settings can be replaced by LILO overrides (append) with the following syntax: *
* AM53C974=host-scsi-id, target-scsi-id, max-rate, max-offset *
* Sync. negotiation is disabled by default and will be enabled for those targets which *
* are specified in the LILO override *
****************************************************************************************/
#define DEFAULT_SYNC_NEGOTIATION_ENABLED 0 /* 0 or 1 */
#define DEFAULT_RATE 5 /* MHz, min: 3; max: 10 */
#define DEFAULT_SYNC_OFFSET 0 /* bytes, min: 0; max: 15; use 0 for async. mode */
/* --------------------- don't edit below here --------------------- */
#define AM53C974_DRIVER_REVISION_MAJOR 0
#define AM53C974_DRIVER_REVISION_MINOR 5
#define SEPARATOR_LINE \
"--------------------------------------------------------------------------\n"
/* debug control */
/* #define AM53C974_DEBUG */
/* #define AM53C974_DEBUG_MSG */
/* #define AM53C974_DEBUG_KEYWAIT */
/* #define AM53C974_DEBUG_INIT */
/* #define AM53C974_DEBUG_QUEUE */
/* #define AM53C974_DEBUG_INFO */
/* #define AM53C974_DEBUG_LINKED */
/* #define VERBOSE_AM53C974_DEBUG */
/* #define AM53C974_DEBUG_INTR */
/* #define AM53C974_DEB_RESEL */
#define AM53C974_DEBUG_ABORT
/* #define AM53C974_OPTION_DEBUG_PROBE_ONLY */
/* special options/constants */
#define DEF_CLK 40 /* chip clock freq. in MHz */
#define MIN_PERIOD 4 /* for negotiation: min. number of clocks per cycle */
#define MAX_PERIOD 13 /* for negotiation: max. number of clocks per cycle */
#define MAX_OFFSET 15 /* for negotiation: max. offset (0=async) */
#define DEF_SCSI_TIMEOUT 245 /* STIMREG value, 40 Mhz */
#define DEF_STP 8 /* STPREG value assuming 5.0 MB/sec, FASTCLK, FASTSCSI */
#define DEF_SOF_RAD 0 /* REQ/ACK deassertion delay */
#define DEF_SOF_RAA 0 /* REQ/ACK assertion delay */
#define DEF_ETM 0 /* CNTLREG1, ext. timing mode */
#define DEF_PERE 1 /* CNTLREG1, parity error reporting */
#define DEF_CLKF 0 /* CLKFREG, 0=40 Mhz */
#define DEF_ENF 1 /* CNTLREG2, enable features */
#define DEF_ADIDCHK 0 /* CNTLREG3, additional ID check */
#define DEF_FASTSCSI 1 /* CNTLREG3, fast SCSI */
#define DEF_FASTCLK 1 /* CNTLREG3, fast clocking, 5 MB/sec at 40MHz chip clk */
#define DEF_GLITCH 1 /* CNTLREG4, glitch eater, 0=12ns, 1=35ns, 2=25ns, 3=off */
#define DEF_PWD 0 /* CNTLREG4, reduced power feature */
#define DEF_RAE 0 /* CNTLREG4, RAE active negation on REQ, ACK only */
#define DEF_RADE 1 /* 1CNTLREG4, active negation on REQ, ACK and data */
/*** PCI block ***/
/* standard registers are defined in <linux/pci.h> */
#ifndef PCI_VENDOR_ID_AMD
#define PCI_VENDOR_ID_AMD 0x1022
#define PCI_DEVICE_ID_AMD_SCSI 0x2020
#endif
#define PCI_BASE_MASK 0xFFFFFFE0
#define PCI_COMMAND_PERREN 0x40
#define PCI_SCRATCH_REG_0 0x40 /* 16 bits */
#define PCI_SCRATCH_REG_1 0x42 /* 16 bits */
#define PCI_SCRATCH_REG_2 0x44 /* 16 bits */
#define PCI_SCRATCH_REG_3 0x46 /* 16 bits */
#define PCI_SCRATCH_REG_4 0x48 /* 16 bits */
#define PCI_SCRATCH_REG_5 0x4A /* 16 bits */
#define PCI_SCRATCH_REG_6 0x4C /* 16 bits */
#define PCI_SCRATCH_REG_7 0x4E /* 16 bits */
/*** SCSI block ***/
#define CTCLREG 0x00 /* r current transf. count, low byte */
#define CTCMREG 0x04 /* r current transf. count, middle byte */
#define CTCHREG 0x38 /* r current transf. count, high byte */
#define STCLREG 0x00 /* w start transf. count, low byte */
#define STCMREG 0x04 /* w start transf. count, middle byte */
#define STCHREG 0x38 /* w start transf. count, high byte */
#define FFREG 0x08 /* rw SCSI FIFO reg. */
#define STIMREG 0x14 /* w SCSI timeout reg. */
#define SDIDREG 0x10 /* w SCSI destination ID reg. */
#define SDIREG_MASK 0x07 /* mask */
#define STPREG 0x18 /* w synchronous transf. period reg. */
#define STPREG_STP 0x1F /* synchr. transfer period */
#define CLKFREG 0x24 /* w clock factor reg. */
#define CLKFREG_MASK 0x07 /* mask */
#define CMDREG 0x0C /* rw SCSI command reg. */
#define CMDREG_DMA 0x80 /* set DMA mode (set together with opcodes below) */
#define CMDREG_IT 0x10 /* information transfer */
#define CMDREG_ICCS 0x11 /* initiator command complete steps */
#define CMDREG_MA 0x12 /* message accepted */
#define CMDREG_TPB 0x98 /* transfer pad bytes, DMA mode only */
#define CMDREG_SATN 0x1A /* set ATN */
#define CMDREG_RATN 0x1B /* reset ATN */
#define CMDREG_SOAS 0x41 /* select without ATN steps */
#define CMDREG_SAS 0x42 /* select with ATN steps (1 msg byte) */
#define CMDREG_SASS 0x43 /* select with ATN and stop steps */
#define CMDREG_ESR 0x44 /* enable selection/reselection */
#define CMDREG_DSR 0x45 /* disable selection/reselection */
#define CMDREG_SA3S 0x46 /* select with ATN 3 steps (3 msg bytes) */
#define CMDREG_NOP 0x00 /* no operation */
#define CMDREG_CFIFO 0x01 /* clear FIFO */
#define CMDREG_RDEV 0x02 /* reset device */
#define CMDREG_RBUS 0x03 /* reset SCSI bus */
#define STATREG 0x10 /* r SCSI status reg. */
#define STATREG_INT 0x80 /* SCSI interrupt condition detected */
#define STATREG_IOE 0x40 /* SCSI illegal operation error detected */
#define STATREG_PE 0x20 /* SCSI parity error detected */
#define STATREG_CTZ 0x10 /* CTC reg decremented to zero */
#define STATREG_MSG 0x04 /* SCSI MSG phase (latched?) */
#define STATREG_CD 0x02 /* SCSI C/D phase (latched?) */
#define STATREG_IO 0x01 /* SCSI I/O phase (latched?) */
#define STATREG_PHASE 0x07 /* SCSI phase mask */
#define INSTREG 0x14 /* r interrupt status reg. */
#define INSTREG_SRST 0x80 /* SCSI reset detected */
#define INSTREG_ICMD 0x40 /* SCSI invalid command detected */
#define INSTREG_DIS 0x20 /* target disconnected or sel/resel timeout*/
#define INSTREG_SR 0x10 /* device on bus has service request */
#define INSTREG_SO 0x08 /* successful operation */
#define INSTREG_RESEL 0x04 /* device reselected as initiator */
#define ISREG 0x18 /* r internal state reg. */
#define ISREG_SOF 0x08 /* synchronous offset flag (act. low) */
#define ISREG_IS 0x07 /* status of intermediate op. */
#define ISREG_OK_NO_STOP 0x04 /* selection successful */
#define ISREG_OK_STOP 0x01 /* selection successful */
#define CFIREG 0x1C /* r current FIFO/internal state reg. */
#define CFIREG_IS 0xE0 /* status of intermediate op. */
#define CFIREG_CF 0x1F /* number of bytes in SCSI FIFO */
#define SOFREG 0x1C /* w synchr. offset reg. */
#define SOFREG_RAD 0xC0 /* REQ/ACK deassertion delay (sync.) */
#define SOFREG_RAA 0x30 /* REQ/ACK assertion delay (sync.) */
#define SOFREG_SO 0x0F /* synch. offset (sync.) */
#define CNTLREG1 0x20 /* rw control register one */
#define CNTLREG1_ETM 0x80 /* set extended timing mode */
#define CNTLREG1_DISR 0x40 /* disable interrupt on SCSI reset */
#define CNTLREG1_PERE 0x10 /* enable parity error reporting */
#define CNTLREG1_SID 0x07 /* host adapter SCSI ID */
#define CNTLREG2 0x2C /* rw control register two */
#define CNTLREG2_ENF 0x40 /* enable features */
#define CNTLREG3 0x30 /* rw control register three */
#define CNTLREG3_ADIDCHK 0x80 /* additional ID check */
#define CNTLREG3_FASTSCSI 0x10 /* fast SCSI */
#define CNTLREG3_FASTCLK 0x08 /* fast SCSI clocking */
#define CNTLREG4 0x34 /* rw control register four */
#define CNTLREG4_GLITCH 0xC0 /* glitch eater */
#define CNTLREG4_PWD 0x20 /* reduced power feature */
#define CNTLREG4_RAE 0x08 /* write only, active negot. ctrl. */
#define CNTLREG4_RADE 0x04 /* active negot. ctrl. */
#define CNTLREG4_RES 0x10 /* reserved bit, must be 1 */
/*** DMA block ***/
#define DMACMD 0x40 /* rw command */
#define DMACMD_DIR 0x80 /* transfer direction (1=read from device) */
#define DMACMD_INTE_D 0x40 /* DMA transfer interrupt enable */
#define DMACMD_INTE_P 0x20 /* page transfer interrupt enable */
#define DMACMD_MDL 0x10 /* map to memory descriptor list */
#define DMACMD_DIAG 0x04 /* diagnostics, set to 0 */
#define DMACMD_IDLE 0x00 /* idle cmd */
#define DMACMD_BLAST 0x01 /* flush FIFO to memory */
#define DMACMD_ABORT 0x02 /* terminate DMA */
#define DMACMD_START 0x03 /* start DMA */
#define DMASTATUS 0x54 /* r status register */
#define DMASTATUS_BCMPLT 0x20 /* BLAST complete */
#define DMASTATUS_SCSIINT 0x10 /* SCSI interrupt pending */
#define DMASTATUS_DONE 0x08 /* DMA transfer terminated */
#define DMASTATUS_ABORT 0x04 /* DMA transfer aborted */
#define DMASTATUS_ERROR 0x02 /* DMA transfer error */
#define DMASTATUS_PWDN 0x02 /* power down indicator */
#define DMASTC 0x44 /* rw starting transfer count */
#define DMASPA 0x48 /* rw starting physical address */
#define DMAWBC 0x4C /* r working byte counter */
#define DMAWAC 0x50 /* r working address counter */
#define DMASMDLA 0x58 /* rw starting MDL address */
#define DMAWMAC 0x5C /* r working MDL counter */
/*** SCSI phases ***/
#define PHASE_MSGIN 0x07
#define PHASE_MSGOUT 0x06
#define PHASE_RES_1 0x05
#define PHASE_RES_0 0x04
#define PHASE_STATIN 0x03
#define PHASE_CMDOUT 0x02
#define PHASE_DATAIN 0x01
#define PHASE_DATAOUT 0x00
struct AM53C974_hostdata {
volatile unsigned in_reset:1; /* flag, says bus reset pending */
volatile unsigned aborted:1; /* flag, says aborted */
volatile unsigned selecting:1; /* selection started, but not yet finished */
volatile unsigned disconnecting: 1; /* disconnection started, but not yet finished */
volatile unsigned dma_busy:1; /* dma busy when service request for info transfer received */
volatile unsigned char msgout[10]; /* message to output in MSGOUT_PHASE */
volatile unsigned char last_message[10]; /* last message OUT */
volatile Scsi_Cmnd *issue_queue; /* waiting to be issued */
volatile Scsi_Cmnd *disconnected_queue; /* waiting for reconnect */
volatile Scsi_Cmnd *sel_cmd; /* command for selection */
volatile Scsi_Cmnd *connected; /* currently connected command */
volatile unsigned char busy[8]; /* index = target, bit = lun */
unsigned char sync_per[8]; /* synchronous transfer period (in effect) */
unsigned char sync_off[8]; /* synchronous offset (in effect) */
unsigned char sync_neg[8]; /* sync. negotiation performed (in effect) */
unsigned char sync_en[8]; /* sync. negotiation performed (in effect) */
unsigned char max_rate[8]; /* max. transfer rate (setup) */
unsigned char max_offset[8]; /* max. sync. offset (setup), only valid if corresponding sync_en is nonzero */
};
#define AM53C974 { \
NULL, /* pointer to next in list */ \
NULL, /* long * usage_count */ \
NULL, /* struct proc_dir_entry *proc_dir */ \
NULL, /* int (*proc_info)(char *, char **, off_t, int, int, int); */ \
"AM53C974", /* name */ \
AM53C974_detect, /* int (* detect)(struct SHT *) */ \
NULL, /* int (*release)(struct Scsi_Host *) */ \
AM53C974_info, /* const char *(* info)(struct Scsi_Host *) */ \
AM53C974_command, /* int (* command)(Scsi_Cmnd *) */ \
AM53C974_queue_command, /* int (* queuecommand)(Scsi_Cmnd *, \
void (*done)(Scsi_Cmnd *)) */ \
AM53C974_abort, /* int (* abort)(Scsi_Cmnd *) */ \
AM53C974_reset, /* int (* reset)(Scsi_Cmnd *) */ \
NULL, /* int (* slave_attach)(int, int) */ \
scsicam_bios_param, /* int (* bios_param)(Disk *, int, int[]) */ \
12, /* can_queue */ \
-1, /* this_id */ \
SG_ALL, /* sg_tablesize */ \
1, /* cmd_per_lun */ \
0, /* present, i.e. how many adapters of this kind */ \
0, /* unchecked_isa_dma */ \
DISABLE_CLUSTERING /* use_clustering */ \
}
void AM53C974_setup(char *str, int *ints);
int AM53C974_detect(Scsi_Host_Template *tpnt);
int AM53C974_biosparm(Disk *disk, int dev, int *info_array);
const char *AM53C974_info(struct Scsi_Host *);
int AM53C974_command(Scsi_Cmnd *SCpnt);
int AM53C974_queue_command(Scsi_Cmnd *cmd, void (*done)(Scsi_Cmnd *));
int AM53C974_abort(Scsi_Cmnd *cmd);
int AM53C974_reset (Scsi_Cmnd *cmd, unsigned int flags);
#define AM53C974_local_declare() unsigned long io_port
#define AM53C974_setio(instance) io_port = instance->io_port
#define AM53C974_read_8(addr) inb(io_port + (addr))
#define AM53C974_write_8(addr,x) outb((x), io_port + (addr))
#define AM53C974_read_16(addr) inw(io_port + (addr))
#define AM53C974_write_16(addr,x) outw((x), io_port + (addr))
#define AM53C974_read_32(addr) inl(io_port + (addr))
#define AM53C974_write_32(addr,x) outl((x), io_port + (addr))
#define AM53C974_poll_int() { do { statreg = AM53C974_read_8(STATREG); } \
while (!(statreg & STATREG_INT)) ; \
AM53C974_read_8(INSTREG) ; } /* clear int */
#define AM53C974_cfifo() (AM53C974_read_8(CFIREG) & CFIREG_CF)
/* These are "special" values for the tag parameter passed to AM53C974_select. */
#define TAG_NEXT -1 /* Use next free tag */
#define TAG_NONE -2 /* Establish I_T_L nexus instead of I_T_L_Q
* even on SCSI-II devices */
/************ LILO overrides *************/
typedef struct _override_t {
int host_scsi_id; /* SCSI id of the bus controller */
int target_scsi_id; /* SCSI id of target */
int max_rate; /* max. transfer rate */
int max_offset; /* max. sync. offset, 0 = asynchronous */
} override_t;
/************ PCI stuff *************/
#define AM53C974_PCIREG_OPEN() outb(0xF1, 0xCF8); outb(0, 0xCFA)
#define AM53C974_PCIREG_CLOSE() outb(0, 0xCF8)
#define AM53C974_PCIREG_READ_BYTE(instance,a) ( inb((a) + (instance)->io_port) )
#define AM53C974_PCIREG_READ_WORD(instance,a) ( inw((a) + (instance)->io_port) )
#define AM53C974_PCIREG_READ_DWORD(instance,a) ( inl((a) + (instance)->io_port) )
#define AM53C974_PCIREG_WRITE_BYTE(instance,x,a) ( outb((x), (a) + (instance)->io_port) )
#define AM53C974_PCIREG_WRITE_WORD(instance,x,a) ( outw((x), (a) + (instance)->io_port) )
#define AM53C974_PCIREG_WRITE_DWORD(instance,x,a) ( outl((x), (a) + (instance)->io_port) )
typedef struct _pci_config_t {
/* start of official PCI config space header */
union {
unsigned int device_vendor;
struct {
unsigned short vendor;
unsigned short device;
} dv;
} dv_id;
#define _device_vendor dv_id.device_vendor
#define _vendor dv_id.dv.vendor
#define _device dv_id.dv.device
union {
unsigned int status_command;
struct {
unsigned short command;
unsigned short status;
} sc;
} stat_cmd;
#define _status_command stat_cmd.status_command
#define _command stat_cmd.sc.command
#define _status stat_cmd.sc.status
union {
unsigned int class_revision;
struct {
unsigned char rev_id;
unsigned char prog_if;
unsigned char sub_class;
unsigned char base_class;
} cr;
} class_rev;
#define _class_revision class_rev.class_revision
#define _rev_id class_rev.cr.rev_id
#define _prog_if class_rev.cr.prog_if
#define _sub_class class_rev.cr.sub_class
#define _base_class class_rev.cr.base_class
union {
unsigned int bist_header_latency_cache;
struct {
unsigned char cache_line_size;
unsigned char latency_timer;
unsigned char header_type;
unsigned char bist;
} bhlc;
} bhlc;
#define _bist_header_latency_cache bhlc.bist_header_latency_cache
#define _cache_line_size bhlc.bhlc.cache_line_size
#define _latency_timer bhlc.bhlc.latency_timer
#define _header_type bhlc.bhlc.header_type
#define _bist bhlc.bhlc.bist
unsigned int _base0;
unsigned int _base1;
unsigned int _base2;
unsigned int _base3;
unsigned int _base4;
unsigned int _base5;
unsigned int rsvd1;
unsigned int rsvd2;
unsigned int _baserom;
unsigned int rsvd3;
unsigned int rsvd4;
union {
unsigned int max_min_ipin_iline;
struct {
unsigned char int_line;
unsigned char int_pin;
unsigned char min_gnt;
unsigned char max_lat;
} mmii;
} mmii;
#define _max_min_ipin_iline mmii.max_min_ipin_iline
#define _int_line mmii.mmii.int_line
#define _int_pin mmii.mmii.int_pin
#define _min_gnt mmii.mmii.min_gnt
#define _max_lat mmii.mmii.max_lat
/* end of official PCI config space header */
unsigned short _ioaddr; /* config type 1 - private I/O addr */
unsigned int _pcibus; /* config type 2 - private bus id */
unsigned int _cardnum; /* config type 2 - private card number */
} pci_config_t;
#endif /* AM53C974_H */
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