/* NCR53C9x.c: Defines and structures for the NCR53C9x generic driver.
*
* Originaly esp.h: Defines and structures for the Sparc ESP
* (Enhanced SCSI Processor) driver under Linux.
*
* Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu)
*
* Generalization by Jesper Skov (jskov@cygnus.co.uk)
*
* More generalization (for i386 stuff) by Tymm Twillman (tymm@computer.org)
*/
#ifndef NCR53C9X_H
#define NCR53C9X_H
#include <linux/config.h>
#include <linux/interrupt.h>
/* djweis for mac driver */
#if defined(CONFIG_MAC)
#define PAD_SIZE 15
#else
#define PAD_SIZE 3
#endif
/* Handle multiple hostadapters on Amiga
* generally PAD_SIZE = 3
* but there is one exception: Oktagon (PAD_SIZE = 1) */
#if defined(CONFIG_OKTAGON_SCSI) || defined(CONFIG_OKTAGON_SCSI_MODULE)
#undef PAD_SIZE
#if defined(CONFIG_BLZ1230_SCSI) || defined(CONFIG_BLZ1230_SCSI_MODULE) || \
defined(CONFIG_BLZ2060_SCSI) || defined(CONFIG_BLZ2060_SCSI_MODULE) || \
defined(CONFIG_CYBERSTORM_SCSI) || defined(CONFIG_CYBERSTORM_SCSI_MODULE) || \
defined(CONFIG_CYBERSTORMII_SCSI) || defined(CONFIG_CYBERSTORMII_SCSI_MODULE) || \
defined(CONFIG_FASTLANE_SCSI) || defined(CONFIG_FASTLANE_SCSI_MODULE)
#define MULTIPLE_PAD_SIZES
#else
#define PAD_SIZE 1
#endif
#endif
/* Macros for debugging messages */
#define DEBUG_ESP
/* #define DEBUG_ESP_DATA */
/* #define DEBUG_ESP_QUEUE */
/* #define DEBUG_ESP_DISCONNECT */
/* #define DEBUG_ESP_STATUS */
/* #define DEBUG_ESP_PHASES */
/* #define DEBUG_ESP_WORKBUS */
/* #define DEBUG_STATE_MACHINE */
/* #define DEBUG_ESP_CMDS */
/* #define DEBUG_ESP_IRQS */
/* #define DEBUG_SDTR */
/* #define DEBUG_ESP_SG */
/* Use the following to sprinkle debugging messages in a way which
* suits you if combinations of the above become too verbose when
* trying to track down a specific problem.
*/
/* #define DEBUG_ESP_MISC */
#if defined(DEBUG_ESP)
#define ESPLOG(foo) printk foo
#else
#define ESPLOG(foo)
#endif /* (DEBUG_ESP) */
#if defined(DEBUG_ESP_DATA)
#define ESPDATA(foo) printk foo
#else
#define ESPDATA(foo)
#endif
#if defined(DEBUG_ESP_QUEUE)
#define ESPQUEUE(foo) printk foo
#else
#define ESPQUEUE(foo)
#endif
#if defined(DEBUG_ESP_DISCONNECT)
#define ESPDISC(foo) printk foo
#else
#define ESPDISC(foo)
#endif
#if defined(DEBUG_ESP_STATUS)
#define ESPSTAT(foo) printk foo
#else
#define ESPSTAT(foo)
#endif
#if defined(DEBUG_ESP_PHASES)
#define ESPPHASE(foo) printk foo
#else
#define ESPPHASE(foo)
#endif
#if defined(DEBUG_ESP_WORKBUS)
#define ESPBUS(foo) printk foo
#else
#define ESPBUS(foo)
#endif
#if defined(DEBUG_ESP_IRQS)
#define ESPIRQ(foo) printk foo
#else
#define ESPIRQ(foo)
#endif
#if defined(DEBUG_SDTR)
#define ESPSDTR(foo) printk foo
#else
#define ESPSDTR(foo)
#endif
#if defined(DEBUG_ESP_MISC)
#define ESPMISC(foo) printk foo
#else
#define ESPMISC(foo)
#endif
/*
* padding for register structure
*/
#ifdef CONFIG_JAZZ_ESP
#define EREGS_PAD(n)
#else
#ifndef MULTIPLE_PAD_SIZES
#define EREGS_PAD(n) unchar n[PAD_SIZE];
#endif
#endif
/* The ESP SCSI controllers have their register sets in three
* "classes":
*
* 1) Registers which are both read and write.
* 2) Registers which are read only.
* 3) Registers which are write only.
*
* Yet, they all live within the same IO space.
*/
#if !defined(__i386__) && !defined(__x86_64__)
#ifndef MULTIPLE_PAD_SIZES
#ifdef CONFIG_CPU_HAS_WB
#include <asm/wbflush.h>
#define esp_write(__reg, __val) do{(__reg) = (__val); wbflush();} while(0)
#else
#define esp_write(__reg, __val) ((__reg) = (__val))
#endif
#define esp_read(__reg) (__reg)
struct ESP_regs {
/* Access Description Offset */
volatile unchar esp_tclow; /* rw Low bits of the transfer count 0x00 */
EREGS_PAD(tlpad1);
volatile unchar esp_tcmed; /* rw Mid bits of the transfer count 0x04 */
EREGS_PAD(fdpad);
volatile unchar esp_fdata; /* rw FIFO data bits 0x08 */
EREGS_PAD(cbpad);
volatile unchar esp_cmnd; /* rw SCSI command bits 0x0c */
EREGS_PAD(stpad);
volatile unchar esp_status; /* ro ESP status register 0x10 */
#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
EREGS_PAD(irqpd);
volatile unchar esp_intrpt; /* ro Kind of interrupt 0x14 */
#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
EREGS_PAD(sspad);
volatile unchar esp_sstep; /* ro Sequence step register 0x18 */
#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
EREGS_PAD(ffpad);
volatile unchar esp_fflags; /* ro Bits of current FIFO info 0x1c */
#define esp_soff esp_fflags /* wo Sync offset 0x1c */
EREGS_PAD(cf1pd);
volatile unchar esp_cfg1; /* rw First configuration register 0x20 */
EREGS_PAD(cfpad);
volatile unchar esp_cfact; /* wo Clock conversion factor 0x24 */
EREGS_PAD(ctpad);
volatile unchar esp_ctest; /* wo Chip test register 0x28 */
EREGS_PAD(cf2pd);
volatile unchar esp_cfg2; /* rw Second configuration register 0x2c */
EREGS_PAD(cf3pd);
/* The following is only found on the 53C9X series SCSI chips */
volatile unchar esp_cfg3; /* rw Third configuration register 0x30 */
EREGS_PAD(cf4pd);
volatile unchar esp_cfg4; /* rw Fourth configuration register 0x34 */
EREGS_PAD(thpd);
/* The following is found on all chips except the NCR53C90 (ESP100) */
volatile unchar esp_tchi; /* rw High bits of transfer count 0x38 */
#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
EREGS_PAD(fgpad);
volatile unchar esp_fgrnd; /* rw Data base for fifo 0x3c */
};
#else /* MULTIPLE_PAD_SIZES */
#define esp_write(__reg, __val) (*(__reg) = (__val))
#define esp_read(__reg) (*(__reg))
struct ESP_regs {
unsigned char io_addr[64]; /* dummy */
/* Access Description Offset */
#define esp_tclow io_addr /* rw Low bits of the transfer count 0x00 */
#define esp_tcmed io_addr + (1<<(esp->shift)) /* rw Mid bits of the transfer count 0x04 */
#define esp_fdata io_addr + (2<<(esp->shift)) /* rw FIFO data bits 0x08 */
#define esp_cmnd io_addr + (3<<(esp->shift)) /* rw SCSI command bits 0x0c */
#define esp_status io_addr + (4<<(esp->shift)) /* ro ESP status register 0x10 */
#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
#define esp_intrpt io_addr + (5<<(esp->shift)) /* ro Kind of interrupt 0x14 */
#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
#define esp_sstep io_addr + (6<<(esp->shift)) /* ro Sequence step register 0x18 */
#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
#define esp_fflags io_addr + (7<<(esp->shift)) /* ro Bits of current FIFO info 0x1c */
#define esp_soff esp_fflags /* wo Sync offset 0x1c */
#define esp_cfg1 io_addr + (8<<(esp->shift)) /* rw First configuration register 0x20 */
#define esp_cfact io_addr + (9<<(esp->shift)) /* wo Clock conversion factor 0x24 */
#define esp_ctest io_addr + (10<<(esp->shift)) /* wo Chip test register 0x28 */
#define esp_cfg2 io_addr + (11<<(esp->shift)) /* rw Second configuration register 0x2c */
/* The following is only found on the 53C9X series SCSI chips */
#define esp_cfg3 io_addr + (12<<(esp->shift)) /* rw Third configuration register 0x30 */
#define esp_cfg4 io_addr + (13<<(esp->shift)) /* rw Fourth configuration register 0x34 */
/* The following is found on all chips except the NCR53C90 (ESP100) */
#define esp_tchi io_addr + (14<<(esp->shift)) /* rw High bits of transfer count 0x38 */
#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
#define esp_fgrnd io_addr + (15<<(esp->shift)) /* rw Data base for fifo 0x3c */
};
#endif
#else /* !defined(__i386__) && !defined(__x86_64__) */
#define esp_write(__reg, __val) outb((__val), (__reg))
#define esp_read(__reg) inb((__reg))
struct ESP_regs {
unsigned int io_addr;
/* Access Description Offset */
#define esp_tclow io_addr /* rw Low bits of the transfer count 0x00 */
#define esp_tcmed io_addr + 1 /* rw Mid bits of the transfer count 0x04 */
#define esp_fdata io_addr + 2 /* rw FIFO data bits 0x08 */
#define esp_cmnd io_addr + 3 /* rw SCSI command bits 0x0c */
#define esp_status io_addr + 4 /* ro ESP status register 0x10 */
#define esp_busid esp_status /* wo Bus ID for select/reselect 0x10 */
#define esp_intrpt io_addr + 5 /* ro Kind of interrupt 0x14 */
#define esp_timeo esp_intrpt /* wo Timeout value for select/resel 0x14 */
#define esp_sstep io_addr + 6 /* ro Sequence step register 0x18 */
#define esp_stp esp_sstep /* wo Transfer period per sync 0x18 */
#define esp_fflags io_addr + 7 /* ro Bits of current FIFO info 0x1c */
#define esp_soff esp_fflags /* wo Sync offset 0x1c */
#define esp_cfg1 io_addr + 8 /* rw First configuration register 0x20 */
#define esp_cfact io_addr + 9 /* wo Clock conversion factor 0x24 */
#define esp_ctest io_addr + 10 /* wo Chip test register 0x28 */
#define esp_cfg2 io_addr + 11 /* rw Second configuration register 0x2c */
/* The following is only found on the 53C9X series SCSI chips */
#define esp_cfg3 io_addr + 12 /* rw Third configuration register 0x30 */
#define esp_cfg4 io_addr + 13 /* rw Fourth configuration register 0x34 */
/* The following is found on all chips except the NCR53C90 (ESP100) */
#define esp_tchi io_addr + 14 /* rw High bits of transfer count 0x38 */
#define esp_uid esp_tchi /* ro Unique ID code 0x38 */
#define esp_fgrnd io_addr + 15 /* rw Data base for fifo 0x3c */
};
#endif /* !defined(__i386__) && !defined(__x86_64__) */
/* Various revisions of the ESP board. */
enum esp_rev {
esp100 = 0x00, /* NCR53C90 - very broken */
esp100a = 0x01, /* NCR53C90A */
esp236 = 0x02,
fas236 = 0x03,
fas100a = 0x04,
fast = 0x05,
fas366 = 0x06,
fas216 = 0x07,
fsc = 0x08, /* SYM53C94-2 */
espunknown = 0x09
};
/* We allocate one of these for each scsi device and attach it to
* SDptr->hostdata for use in the driver
*/
struct esp_device {
unsigned char sync_min_period;
unsigned char sync_max_offset;
unsigned sync:1;
unsigned wide:1;
unsigned disconnect:1;
};
/* We get one of these for each ESP probed. */
struct NCR_ESP {
struct NCR_ESP *next; /* Next ESP on probed or NULL */
struct ESP_regs *eregs; /* All esp registers */
int dma; /* Who I do transfers with. */
void *dregs; /* And his registers. */
struct Scsi_Host *ehost; /* Backpointer to SCSI Host */
void *edev; /* Pointer to controller base/SBus */
int esp_id; /* Unique per-ESP ID number */
/* ESP Configuration Registers */
unsigned char config1; /* Copy of the 1st config register */
unsigned char config2; /* Copy of the 2nd config register */
unsigned char config3[16]; /* Copy of the 3rd config register */
/* The current command we are sending to the ESP chip. This esp_command
* ptr needs to be mapped in DVMA area so we can send commands and read
* from the ESP fifo without burning precious CPU cycles. Programmed I/O
* sucks when we have the DVMA to do it for us. The ESP is stupid and will
* only send out 6, 10, and 12 byte SCSI commands, others we need to send
* one byte at a time. esp_slowcmd being set says that we are doing one
* of the command types ESP doesn't understand, esp_scmdp keeps track of
* which byte we are sending, esp_scmdleft says how many bytes to go.
*/
volatile unchar *esp_command; /* Location of command (CPU view) */
__u32 esp_command_dvma; /* Location of command (DVMA view) */
unsigned char esp_clen; /* Length of this command */
unsigned char esp_slowcmd;
unsigned char *esp_scmdp;
unsigned char esp_scmdleft;
/* The following are used to determine the cause of an IRQ. Upon every
* IRQ entry we synchronize these with the hardware registers.
*/
unchar ireg; /* Copy of ESP interrupt register */
unchar sreg; /* Same for ESP status register */
unchar seqreg; /* The ESP sequence register */
/* The following is set when a premature interrupt condition is detected
* in some FAS revisions.
*/
unchar fas_premature_intr_workaround;
/* To save register writes to the ESP, which can be expensive, we
* keep track of the previous value that various registers had for
* the last target we connected to. If they are the same for the
* current target, we skip the register writes as they are not needed.
*/
unchar prev_soff, prev_stp, prev_cfg3;
/* For each target we keep track of save/restore data
* pointer information. This needs to be updated majorly
* when we add support for tagged queueing. -DaveM
*/
struct esp_pointers {
char *saved_ptr;
struct scatterlist *saved_buffer;
int saved_this_residual;
int saved_buffers_residual;
} data_pointers[16] /*XXX [MAX_TAGS_PER_TARGET]*/;
/* Clock periods, frequencies, synchronization, etc. */
unsigned int cfreq; /* Clock frequency in HZ */
unsigned int cfact; /* Clock conversion factor */
unsigned int ccycle; /* One ESP clock cycle */
unsigned int ctick; /* One ESP clock time */
unsigned int radelay; /* FAST chip req/ack delay */
unsigned int neg_defp; /* Default negotiation period */
unsigned int sync_defp; /* Default sync transfer period */
unsigned int max_period; /* longest our period can be */
unsigned int min_period; /* shortest period we can withstand */
/* For slow to medium speed input clock rates we shoot for 5mb/s,
* but for high input clock rates we try to do 10mb/s although I
* don't think a transfer can even run that fast with an ESP even
* with DMA2 scatter gather pipelining.
*/
#define SYNC_DEFP_SLOW 0x32 /* 5mb/s */
#define SYNC_DEFP_FAST 0x19 /* 10mb/s */
unsigned int snip; /* Sync. negotiation in progress */
unsigned int wnip; /* WIDE negotiation in progress */
unsigned int targets_present; /* targets spoken to before */
int current_transfer_size; /* Set at beginning of data dma */
unchar espcmdlog[32]; /* Log of current esp cmds sent. */
unchar espcmdent; /* Current entry in esp cmd log. */
/* Misc. info about this ESP */
enum esp_rev erev; /* ESP revision */
int irq; /* IRQ for this ESP */
int scsi_id; /* Who am I as initiator? */
int scsi_id_mask; /* Bitmask of 'me'. */
int diff; /* Differential SCSI bus? */
int slot; /* Slot the adapter occupies */
/* Our command queues, only one cmd lives in the current_SC queue. */
Scsi_Cmnd *issue_SC; /* Commands to be issued */
Scsi_Cmnd *current_SC; /* Who is currently working the bus */
Scsi_Cmnd *disconnected_SC; /* Commands disconnected from the bus */
/* Message goo */
unchar cur_msgout[16];
unchar cur_msgin[16];
unchar prevmsgout, prevmsgin;
unchar msgout_len, msgin_len;
unchar msgout_ctr, msgin_ctr;
/* States that we cannot keep in the per cmd structure because they
* cannot be assosciated with any specific command.
*/
unchar resetting_bus;
wait_queue_head_t reset_queue;
unchar do_pio_cmds; /* Do command transfer with pio */
/* How much bits do we have to shift the registers */
unsigned char shift;
/* Functions handling DMA
*/
/* Required functions */
int (*dma_bytes_sent)(struct NCR_ESP *, int);
int (*dma_can_transfer)(struct NCR_ESP *, Scsi_Cmnd *);
void (*dma_dump_state)(struct NCR_ESP *);
void (*dma_init_read)(struct NCR_ESP *, __u32, int);
void (*dma_init_write)(struct NCR_ESP *, __u32, int);
void (*dma_ints_off)(struct NCR_ESP *);
void (*dma_ints_on)(struct NCR_ESP *);
int (*dma_irq_p)(struct NCR_ESP *);
int (*dma_ports_p)(struct NCR_ESP *);
void (*dma_setup)(struct NCR_ESP *, __u32, int, int);
/* Optional functions (i.e. may be initialized to 0) */
void (*dma_barrier)(struct NCR_ESP *);
void (*dma_drain)(struct NCR_ESP *);
void (*dma_invalidate)(struct NCR_ESP *);
void (*dma_irq_entry)(struct NCR_ESP *);
void (*dma_irq_exit)(struct NCR_ESP *);
void (*dma_led_off)(struct NCR_ESP *);
void (*dma_led_on)(struct NCR_ESP *);
void (*dma_poll)(struct NCR_ESP *, unsigned char *);
void (*dma_reset)(struct NCR_ESP *);
/* Optional virtual DMA functions */
void (*dma_mmu_get_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
void (*dma_mmu_get_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
void (*dma_mmu_release_scsi_one)(struct NCR_ESP *, Scsi_Cmnd *);
void (*dma_mmu_release_scsi_sgl)(struct NCR_ESP *, Scsi_Cmnd *);
void (*dma_advance_sg)(Scsi_Cmnd *);
};
/* Bitfield meanings for the above registers. */
/* ESP config reg 1, read-write, found on all ESP chips */
#define ESP_CONFIG1_ID 0x07 /* My BUS ID bits */
#define ESP_CONFIG1_CHTEST 0x08 /* Enable ESP chip tests */
#define ESP_CONFIG1_PENABLE 0x10 /* Enable parity checks */
#define ESP_CONFIG1_PARTEST 0x20 /* Parity test mode enabled? */
#define ESP_CONFIG1_SRRDISAB 0x40 /* Disable SCSI reset reports */
#define ESP_CONFIG1_SLCABLE 0x80 /* Enable slow cable mode */
/* ESP config reg 2, read-write, found only on esp100a+esp200+esp236+fsc chips */
#define ESP_CONFIG2_DMAPARITY 0x01 /* enable DMA Parity (200,236,fsc) */
#define ESP_CONFIG2_REGPARITY 0x02 /* enable reg Parity (200,236,fsc) */
#define ESP_CONFIG2_BADPARITY 0x04 /* Bad parity target abort */
#define ESP_CONFIG2_SCSI2ENAB 0x08 /* Enable SCSI-2 features (tmode only) */
#define ESP_CONFIG2_HI 0x10 /* High Impedance DREQ ??? */
#define ESP_CONFIG2_HMEFENAB 0x10 /* HME features enable */
#define ESP_CONFIG2_BCM 0x20 /* Enable byte-ctrl (236,fsc) */
#define ESP_CONFIG2_FENAB 0x40 /* Enable features (fas100,esp216,fsc) */
#define ESP_CONFIG2_SPL 0x40 /* Enable status-phase latch (esp236) */
#define ESP_CONFIG2_RFB 0x80 /* Reserve FIFO byte (fsc) */
#define ESP_CONFIG2_MAGIC 0xe0 /* Invalid bits... */
/* ESP config register 3 read-write, found only esp236+fas236+fas100a+fsc chips */
#define ESP_CONFIG3_FCLOCK 0x01 /* FAST SCSI clock rate (esp100a/fas366) */
#define ESP_CONFIG3_TEM 0x01 /* Enable thresh-8 mode (esp/fas236/fsc) */
#define ESP_CONFIG3_FAST 0x02 /* Enable FAST SCSI (esp100a) */
#define ESP_CONFIG3_ADMA 0x02 /* Enable alternate-dma (esp/fas236/fsc) */
#define ESP_CONFIG3_TENB 0x04 /* group2 SCSI2 support (esp100a) */
#define ESP_CONFIG3_SRB 0x04 /* Save residual byte (esp/fas236/fsc) */
#define ESP_CONFIG3_TMS 0x08 /* Three-byte msg's ok (esp100a) */
#define ESP_CONFIG3_FCLK 0x08 /* Fast SCSI clock rate (esp/fas236/fsc) */
#define ESP_CONFIG3_IDMSG 0x10 /* ID message checking (esp100a) */
#define ESP_CONFIG3_FSCSI 0x10 /* Enable FAST SCSI (esp/fas236/fsc) */
#define ESP_CONFIG3_GTM 0x20 /* group2 SCSI2 support (esp/fas236/fsc) */
#define ESP_CONFIG3_TBMS 0x40 /* Three-byte msg's ok (esp/fas236/fsc) */
#define ESP_CONFIG3_IMS 0x80 /* ID msg chk'ng (esp/fas236/fsc) */
/* ESP config register 4 read-write, found only on fsc chips */
#define ESP_CONFIG4_BBTE 0x01 /* Back-to-Back transfer enable */
#define ESP_CONFIG4_TEST 0x02 /* Transfer counter test mode */
#define ESP_CONFIG4_EAN 0x04 /* Enable Active Negotiation */
/* ESP command register read-write */
/* Group 1 commands: These may be sent at any point in time to the ESP
* chip. None of them can generate interrupts 'cept
* the "SCSI bus reset" command if you have not disabled
* SCSI reset interrupts in the config1 ESP register.
*/
#define ESP_CMD_NULL 0x00 /* Null command, ie. a nop */
#define ESP_CMD_FLUSH 0x01 /* FIFO Flush */
#define ESP_CMD_RC 0x02 /* Chip reset */
#define ESP_CMD_RS 0x03 /* SCSI bus reset */
/* Group 2 commands: ESP must be an initiator and connected to a target
* for these commands to work.
*/
#define ESP_CMD_TI 0x10 /* Transfer Information */
#define ESP_CMD_ICCSEQ 0x11 /* Initiator cmd complete sequence */
#define ESP_CMD_MOK 0x12 /* Message okie-dokie */
#define ESP_CMD_TPAD 0x18 /* Transfer Pad */
#define ESP_CMD_SATN 0x1a /* Set ATN */
#define ESP_CMD_RATN 0x1b /* De-assert ATN */
/* Group 3 commands: ESP must be in the MSGOUT or MSGIN state and be connected
* to a target as the initiator for these commands to work.
*/
#define ESP_CMD_SMSG 0x20 /* Send message */
#define ESP_CMD_SSTAT 0x21 /* Send status */
#define ESP_CMD_SDATA 0x22 /* Send data */
#define ESP_CMD_DSEQ 0x23 /* Discontinue Sequence */
#define ESP_CMD_TSEQ 0x24 /* Terminate Sequence */
#define ESP_CMD_TCCSEQ 0x25 /* Target cmd cmplt sequence */
#define ESP_CMD_DCNCT 0x27 /* Disconnect */
#define ESP_CMD_RMSG 0x28 /* Receive Message */
#define ESP_CMD_RCMD 0x29 /* Receive Command */
#define ESP_CMD_RDATA 0x2a /* Receive Data */
#define ESP_CMD_RCSEQ 0x2b /* Receive cmd sequence */
/* Group 4 commands: The ESP must be in the disconnected state and must
* not be connected to any targets as initiator for
* these commands to work.
*/
#define ESP_CMD_RSEL 0x40 /* Reselect */
#define ESP_CMD_SEL 0x41 /* Select w/o ATN */
#define ESP_CMD_SELA 0x42 /* Select w/ATN */
#define ESP_CMD_SELAS 0x43 /* Select w/ATN & STOP */
#define ESP_CMD_ESEL 0x44 /* Enable selection */
#define ESP_CMD_DSEL 0x45 /* Disable selections */
#define ESP_CMD_SA3 0x46 /* Select w/ATN3 */
#define ESP_CMD_RSEL3 0x47 /* Reselect3 */
/* This bit enables the ESP's DMA */
#define ESP_CMD_DMA 0x80 /* Do DMA? */
/* ESP status register read-only */
#define ESP_STAT_PIO 0x01 /* IO phase bit */
#define ESP_STAT_PCD 0x02 /* CD phase bit */
#define ESP_STAT_PMSG 0x04 /* MSG phase bit */
#define ESP_STAT_PMASK 0x07 /* Mask of phase bits */
#define ESP_STAT_TDONE 0x08 /* Transfer Completed */
#define ESP_STAT_TCNT 0x10 /* Transfer Counter Is Zero */
#define ESP_STAT_PERR 0x20 /* Parity error */
#define ESP_STAT_SPAM 0x40 /* Real bad error */
/* This indicates the 'interrupt pending' condition, it is a reserved
* bit on old revs of the ESP (ESP100, ESP100A, FAS100A).
*/
#define ESP_STAT_INTR 0x80 /* Interrupt */
/* The status register can be masked with ESP_STAT_PMASK and compared
* with the following values to determine the current phase the ESP
* (at least thinks it) is in. For our purposes we also add our own
* software 'done' bit for our phase management engine.
*/
#define ESP_DOP (0) /* Data Out */
#define ESP_DIP (ESP_STAT_PIO) /* Data In */
#define ESP_CMDP (ESP_STAT_PCD) /* Command */
#define ESP_STATP (ESP_STAT_PCD|ESP_STAT_PIO) /* Status */
#define ESP_MOP (ESP_STAT_PMSG|ESP_STAT_PCD) /* Message Out */
#define ESP_MIP (ESP_STAT_PMSG|ESP_STAT_PCD|ESP_STAT_PIO) /* Message In */
/* ESP interrupt register read-only */
#define ESP_INTR_S 0x01 /* Select w/o ATN */
#define ESP_INTR_SATN 0x02 /* Select w/ATN */
#define ESP_INTR_RSEL 0x04 /* Reselected */
#define ESP_INTR_FDONE 0x08 /* Function done */
#define ESP_INTR_BSERV 0x10 /* Bus service */
#define ESP_INTR_DC 0x20 /* Disconnect */
#define ESP_INTR_IC 0x40 /* Illegal command given */
#define ESP_INTR_SR 0x80 /* SCSI bus reset detected */
/* Interrupt status macros */
#define ESP_SRESET_IRQ(esp) ((esp)->intreg & (ESP_INTR_SR))
#define ESP_ILLCMD_IRQ(esp) ((esp)->intreg & (ESP_INTR_IC))
#define ESP_SELECT_WITH_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_SATN))
#define ESP_SELECT_WITHOUT_ATN_IRQ(esp) ((esp)->intreg & (ESP_INTR_S))
#define ESP_SELECTION_IRQ(esp) ((ESP_SELECT_WITH_ATN_IRQ(esp)) || \
(ESP_SELECT_WITHOUT_ATN_IRQ(esp)))
#define ESP_RESELECTION_IRQ(esp) ((esp)->intreg & (ESP_INTR_RSEL))
/* ESP sequence step register read-only */
#define ESP_STEP_VBITS 0x07 /* Valid bits */
#define ESP_STEP_ASEL 0x00 /* Selection&Arbitrate cmplt */
#define ESP_STEP_SID 0x01 /* One msg byte sent */
#define ESP_STEP_NCMD 0x02 /* Was not in command phase */
#define ESP_STEP_PPC 0x03 /* Early phase chg caused cmnd
* bytes to be lost
*/
#define ESP_STEP_FINI4 0x04 /* Command was sent ok */
/* Ho hum, some ESP's set the step register to this as well... */
#define ESP_STEP_FINI5 0x05
#define ESP_STEP_FINI6 0x06
#define ESP_STEP_FINI7 0x07
#define ESP_STEP_SOM 0x08 /* Synchronous Offset Max */
/* ESP chip-test register read-write */
#define ESP_TEST_TARG 0x01 /* Target test mode */
#define ESP_TEST_INI 0x02 /* Initiator test mode */
#define ESP_TEST_TS 0x04 /* Tristate test mode */
/* ESP unique ID register read-only, found on fas236+fas100a+fsc only */
#define ESP_UID_F100A 0x00 /* FAS100A */
#define ESP_UID_F236 0x02 /* FAS236 */
#define ESP_UID_FSC 0xa2 /* NCR53CF9x-2 */
#define ESP_UID_REV 0x07 /* ESP revision */
#define ESP_UID_FAM 0xf8 /* ESP family */
/* ESP fifo flags register read-only */
/* Note that the following implies a 16 byte FIFO on the ESP. */
#define ESP_FF_FBYTES 0x1f /* Num bytes in FIFO */
#define ESP_FF_ONOTZERO 0x20 /* offset ctr not zero (esp100,fsc) */
#define ESP_FF_SSTEP 0xe0 /* Sequence step */
/* ESP clock conversion factor register write-only */
#define ESP_CCF_F0 0x00 /* 35.01MHz - 40MHz */
#define ESP_CCF_NEVER 0x01 /* Set it to this and die */
#define ESP_CCF_F2 0x02 /* 10MHz */
#define ESP_CCF_F3 0x03 /* 10.01MHz - 15MHz */
#define ESP_CCF_F4 0x04 /* 15.01MHz - 20MHz */
#define ESP_CCF_F5 0x05 /* 20.01MHz - 25MHz */
#define ESP_CCF_F6 0x06 /* 25.01MHz - 30MHz */
#define ESP_CCF_F7 0x07 /* 30.01MHz - 35MHz */
#define ESP_BUS_TIMEOUT 275 /* In milli-seconds */
#define ESP_TIMEO_CONST 8192
#define FSC_TIMEO_CONST 7668
#define ESP_NEG_DEFP(mhz, cfact) \
((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (8192 * (cfact)))
#define FSC_NEG_DEFP(mhz, cfact) \
((ESP_BUS_TIMEOUT * ((mhz) / 1000)) / (7668 * (cfact)))
#define ESP_MHZ_TO_CYCLE(mhertz) ((1000000000) / ((mhertz) / 1000))
#define ESP_TICK(ccf, cycle) ((7682 * (ccf) * (cycle) / 1000))
/* UGLY, UGLY, UGLY! */
extern int nesps, esps_in_use, esps_running;
/* For our interrupt engine. */
#define for_each_esp(esp) \
for((esp) = espchain; (esp); (esp) = (esp)->next)
/* External functions */
extern void esp_bootup_reset(struct NCR_ESP *esp, struct ESP_regs *eregs);
extern struct NCR_ESP *esp_allocate(Scsi_Host_Template *, void *);
extern void esp_deallocate(struct NCR_ESP *);
extern void esp_release(void);
extern void esp_initialize(struct NCR_ESP *);
extern irqreturn_t esp_intr(int, void *, struct pt_regs *);
extern const char *esp_info(struct Scsi_Host *);
extern int esp_queue(Scsi_Cmnd *, void (*done)(Scsi_Cmnd *));
extern int esp_abort(Scsi_Cmnd *);
extern int esp_reset(Scsi_Cmnd *);
extern int esp_proc_info(struct Scsi_Host *shost, char *buffer, char **start, off_t offset, int length,
int inout);
extern int esp_slave_alloc(Scsi_Device *);
extern void esp_slave_destroy(Scsi_Device *);
#endif /* !(NCR53C9X_H) */
