#include <machine/cpu.h>
#include <machine/param.h>
-#if defined(__sparc__)
-#define SPARC_DRIVER
-#include <machine/autoconf.h>
-#include <sparc/dev/sbusvar.h>
-#include <sparc/dev/dmareg.h>
-#include <sparc/dev/dmavar.h>
-#include <sparc/dev/espreg.h>
-#include <sparc/dev/espvar.h>
-#else
-#if (_MACHINE == mac68k)
-#define MAC68K_DRIVER
+#include <dev/ic/ncr53c9xreg.h>
+#include <dev/ic/ncr53c9xvar.h>
+
#include <machine/macinfo.h>
#include <machine/viareg.h>
-struct dma_softc {
- struct esp_softc *sc_esp;
- int sc_active;
- int sc_tc;
- int sc_datain;
- size_t sc_dmasize;
- size_t sc_dmatrans;
- char **sc_dmaaddr;
- size_t *sc_pdmalen;
-};
-
-#include <mac68k/dev/espreg.h>
#include <mac68k/dev/espvar.h>
-#undef ESPCMD_DMA
-#define ESPCMD_DMA 0 /* No DMA */
-#undef ESPCMD_TRPAD
-#define ESPCMD_TRPAD 0x98 /* TRPAD needs DMA flag*/
-
-static __inline__ void dma_intr __P((struct dma_softc *sc));
-
-static __inline__ void
-dma_intr(sc)
- struct dma_softc *sc;
-{
- register struct esp_softc *sc_esp;
- register u_char *p;
- register u_int espphase, espstat, espintr;
- register int cnt;
-
- if (sc->sc_active == 0) {
- printf("dma_intr--inactive DMA\n");
- return;
- }
-
- if ((sc->sc_esp->sc_espintr & ESPINTR_BS) == 0) {
- sc->sc_active = 0;
- return;
- }
- cnt = *sc->sc_pdmalen;
- if (*sc->sc_pdmalen == 0) {
- printf("data interrupt, but no count left.");
- }
-
- p = *sc->sc_dmaaddr;
- sc_esp = sc->sc_esp;
- espphase = sc_esp->sc_phase;
- espstat = (u_int) sc_esp->sc_espstat;
- espintr = (u_int) sc_esp->sc_espintr;
- do {
- if (sc->sc_datain) {
- *p++ = ESP_READ_REG(sc_esp, ESP_FIFO);
- cnt--;
- if (espphase == DATA_IN_PHASE) {
- ESPCMD(sc_esp, ESPCMD_TRANS);
- } else {
- sc->sc_active = 0;
- }
- } else {
- if ( (espphase == DATA_OUT_PHASE)
- || (espphase == MESSAGE_OUT_PHASE)) {
- ESP_WRITE_REG(sc_esp, ESP_FIFO, *p++);
- cnt--;
- ESPCMD(sc_esp, ESPCMD_TRANS);
- } else {
- sc->sc_active = 0;
- }
- }
-
- if (sc->sc_active) {
- while (!DMA_ISINTR(sc));
- espstat = ESP_READ_REG(sc_esp, ESP_STAT);
- espintr = ESP_READ_REG(sc_esp, ESP_INTR);
- espphase = (espintr & ESPINTR_DIS)
- ? /* Disconnected */ BUSFREE_PHASE
- : espstat & ESPSTAT_PHASE;
- }
- } while (sc->sc_active && (espintr & ESPINTR_BS));
- sc_esp->sc_phase = espphase;
- sc_esp->sc_espstat = (u_char) espstat;
- sc_esp->sc_espintr = (u_char) espintr;
- *sc->sc_dmaaddr = p;
- *sc->sc_pdmalen = cnt;
-
- if (*sc->sc_pdmalen == 0) {
- sc->sc_tc = ESPSTAT_TC;
- }
- sc->sc_esp->sc_espstat |= sc->sc_tc;
-}
-#else
-#include <dev/tc/tcvar.h>
-#include <alpha/tc/tcdsvar.h>
-#include <alpha/tc/espreg.h>
-#include <alpha/tc/espvar.h>
-#endif
-#endif
-
-int esp_debug = 0; /*ESP_SHOWPHASE|ESP_SHOWMISC|ESP_SHOWTRAC|ESP_SHOWCMDS;*/
-
-/*static*/ void espattach __P((struct device *, struct device *, void *));
-/*static*/ int espmatch __P((struct device *, void *, void *));
-/*static*/ u_int esp_adapter_info __P((struct esp_softc *));
-/*static*/ void espreadregs __P((struct esp_softc *));
-/*static*/ void esp_select __P((struct esp_softc *, struct esp_ecb *));
-/*static*/ int esp_reselect __P((struct esp_softc *, int));
-/*static*/ void esp_scsi_reset __P((struct esp_softc *));
-/*static*/ void esp_reset __P((struct esp_softc *));
-/*static*/ void esp_init __P((struct esp_softc *, int));
-/*static*/ int esp_scsi_cmd __P((struct scsi_xfer *));
-/*static*/ int esp_poll __P((struct esp_softc *, struct scsi_xfer *, int));
-/*static*/ void esp_sched __P((struct esp_softc *));
-/*static*/ void esp_done __P((struct esp_softc *, struct esp_ecb *));
-/*static*/ void esp_msgin __P((struct esp_softc *));
-/*static*/ void esp_msgout __P((struct esp_softc *));
-/*static*/ int espintr __P((struct esp_softc *));
-/*static*/ void esp_timeout __P((void *arg));
-/*static*/ void esp_abort __P((struct esp_softc *, struct esp_ecb *));
-/*static*/ void esp_dequeue __P((struct esp_softc *, struct esp_ecb *));
-void esp_sense __P((struct esp_softc *, struct esp_ecb *));
-void esp_free_ecb __P((struct esp_softc *, struct esp_ecb *, int));
-struct esp_ecb *esp_get_ecb __P((struct esp_softc *, int));
-static __inline int esp_stp2cpb __P((struct esp_softc *, int));
-static __inline int esp_cpb2stp __P((struct esp_softc *, int));
-static __inline void esp_setsync __P((struct esp_softc *, struct esp_tinfo *));
+void espattach __P((struct device *, struct device *, void *));
+int espmatch __P((struct device *, void *, void *));
/* Linkup to the rest of the kernel */
struct cfattach esp_ca = {
};
struct scsi_adapter esp_switch = {
- esp_scsi_cmd,
+ ncr53c9x_scsi_cmd,
minphys, /* no max at this level; handled by DMA code */
NULL,
NULL,
NULL, /* Use default 'done' routine */
};
+/*
+ * Functions and the switch for the MI code.
+ */
+u_char esp_read_reg __P((struct ncr53c9x_softc *, int));
+void esp_write_reg __P((struct ncr53c9x_softc *, int, u_char));
+int esp_dma_isintr __P((struct ncr53c9x_softc *));
+void esp_dma_reset __P((struct ncr53c9x_softc *));
+int esp_dma_intr __P((struct ncr53c9x_softc *));
+int esp_dma_setup __P((struct ncr53c9x_softc *, caddr_t *,
+ size_t *, int, size_t *));
+void esp_dma_go __P((struct ncr53c9x_softc *));
+void esp_dma_stop __P((struct ncr53c9x_softc *));
+int esp_dma_isactive __P((struct ncr53c9x_softc *));
+
+struct ncr53c9x_glue esp_glue = {
+ esp_read_reg,
+ esp_write_reg,
+ esp_dma_isintr,
+ esp_dma_reset,
+ esp_dma_intr,
+ esp_dma_setup,
+ esp_dma_go,
+ esp_dma_stop,
+ esp_dma_isactive,
+ NULL, /* gl_clear_latched_intr */
+};
+
int
espmatch(parent, vcf, aux)
struct device *parent;
void *vcf, *aux;
{
struct cfdata *cf = vcf;
-#ifdef SPARC_DRIVER
- register struct confargs *ca = aux;
- register struct romaux *ra = &ca->ca_ra;
- if (strcmp(cf->cf_driver->cd_name, ra->ra_name))
- return (0);
- if (ca->ca_bustype == BUS_SBUS)
- return (1);
- ra->ra_len = NBPG;
- return (probeget(ra->ra_vaddr, 1) != -1);
-#else
-#ifdef MAC68K_DRIVER
if ((cf->cf_unit == 0) && mac68k_machine.scsi96)
return (1);
if ((cf->cf_unit == 1) && mac68k_machine.scsi96_2)
return (1);
return (0);
-#else
- struct tcdsdev_attach_args *tcdsdev = aux;
-
- if (strncmp(tcdsdev->tcdsda_modname, "PMAZ-AA ", TC_ROM_LLEN))
- return (0);
- return (!tc_badaddr(tcdsdev->tcdsda_addr));
-#endif
-#endif
}
/*
struct device *parent, *self;
void *aux;
{
-#ifdef SPARC_DRIVER
- register struct confargs *ca = aux;
-#else
-#ifdef MAC68K_DRIVER
extern vm_offset_t SCSIBase;
-#else
- register struct tcdsdev_attach_args *tcdsdev = aux;
-#endif
-#endif
- struct esp_softc *sc = (void *)self;
-#ifdef SPARC_DRIVER
- struct bootpath *bp;
- int dmachild = strncmp(parent->dv_xname, "dma", 3) == 0;
-#endif
+ struct esp_softc *esc = (void *)self;
+ struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x;
-#ifdef SPARC_DRIVER
/*
- * Make sure things are sane. I don't know if this is ever
- * necessary, but it seem to be in all of Torek's code.
+ * Set up the glue for MI code early; we use some of it here.
*/
- if (ca->ca_ra.ra_nintr != 1) {
- printf(": expected 1 interrupt, got %d\n", ca->ca_ra.ra_nintr);
- return;
- }
-
- sc->sc_pri = ca->ca_ra.ra_intr[0].int_pri;
- printf(" pri %d", sc->sc_pri);
+ sc->sc_glue = &esp_glue;
/*
- * Map my registers in, if they aren't already in virtual
- * address space.
+ * Save the regs
*/
- if (ca->ca_ra.ra_vaddr)
- sc->sc_reg = (volatile u_char *) ca->ca_ra.ra_vaddr;
- else {
- sc->sc_reg = (volatile u_char *)
- mapiodev(ca->ca_ra.ra_reg, 0, ca->ca_ra.ra_len, ca->ca_bustype);
- }
-#else
-#ifdef MAC68K_DRIVER
if (sc->sc_dev.dv_unit == 0) {
unsigned long reg_offset;
- sc->sc_reg = (volatile u_char *) SCSIBase;
- mac68k_register_scsi_irq((void (*)(void *)) espintr, sc);
- sc->irq_mask = V2IF_SCSIIRQ;
+ esc->sc_reg = (volatile u_char *) SCSIBase;
+ mac68k_register_scsi_irq(
+ (void (*)(void *)) ncr53c9x_intr, esc);
+ esc->irq_mask = V2IF_SCSIIRQ;
reg_offset = SCSIBase - IOBase;
if (reg_offset == 0x10000) {
sc->sc_freq = 16500000;
sc->sc_freq = 25000000;
}
} else {
- sc->sc_reg = (volatile u_char *) SCSIBase + 0x402;
- mac68k_register_scsi_b_irq((void (*)(void *)) espintr, sc);
- sc->irq_mask = V2IF_SCSIDRQ; /* V2IF_T1? */
+ esc->sc_reg = (volatile u_char *) SCSIBase + 0x402;
+ mac68k_register_scsi_b_irq(
+ (void (*)(void *)) ncr53c9x_intr, sc);
+ esc->irq_mask = V2IF_SCSIDRQ; /* V2IF_T1? */
sc->sc_freq = 25000000;
}
- sc->sc_dma = &sc->_sc_dma;
- printf(": address %p", sc->sc_reg);
- sc->sc_id = 7;
-#else
- sc->sc_reg = (volatile u_int32_t *)tcdsdev->tcdsda_addr;
- sc->sc_cookie = tcdsdev->tcdsda_cookie;
- sc->sc_dma = tcdsdev->tcdsda_sc;
-
- printf(": address %x", sc->sc_reg);
- tcds_intr_establish(parent, sc->sc_cookie, TC_IPL_BIO,
- (int (*)(void *))espintr, sc);
-#endif
-#endif
+ printf(": address %p", esc->sc_reg);
-#ifdef SPARC_DRIVER
- /* Other settings */
- sc->sc_node = ca->ca_ra.ra_node;
- if (ca->ca_bustype == BUS_SBUS) {
- sc->sc_id = getpropint(sc->sc_node, "initiator-id", 7);
- sc->sc_freq = getpropint(sc->sc_node, "clock-frequency", -1);
- } else {
- sc->sc_id = 7;
- sc->sc_freq = 24000000;
- }
- if (sc->sc_freq < 0)
- sc->sc_freq = ((struct sbus_softc *)
- sc->sc_dev.dv_parent)->sc_clockfreq;
-#else
-#ifdef MAC68K_DRIVER
-#else
- if (parent->dv_cfdata->cf_driver == &tcds_cd) {
- sc->sc_id = tcdsdev->tcdsda_id;
- sc->sc_freq = tcdsdev->tcdsda_freq;
- } else {
- /* XXX */
- sc->sc_id = 7;
- sc->sc_freq = 24000000;
- }
-#endif
-#endif
+ sc->sc_id = 7;
/* gimme Mhz */
sc->sc_freq /= 1000000;
-#ifdef SPARC_DRIVER
- if (dmachild) {
- sc->sc_dma = (struct dma_softc *)parent;
- sc->sc_dma->sc_esp = sc;
- } else {
- /*
- * find the DMA by poking around the dma device structures
- *
- * What happens here is that if the dma driver has not been
- * configured, then this returns a NULL pointer. Then when the
- * dma actually gets configured, it does the opposing test, and
- * if the sc->sc_esp field in it's softc is NULL, then tries to
- * find the matching esp driver.
- *
- */
- sc->sc_dma = (struct dma_softc *)
- getdevunit("dma", sc->sc_dev.dv_unit);
-
- /*
- * and a back pointer to us, for DMA
- */
- if (sc->sc_dma)
- sc->sc_dma->sc_esp = sc;
- else
- panic("espattach: no dma found");
- }
-#else
- sc->sc_dma->sc_esp = sc; /* XXX */
-#endif
-
/*
* It is necessary to try to load the 2nd config register here,
* to find out what rev the esp chip is, else the esp_reset
* will not set up the defaults correctly.
*/
- sc->sc_cfg1 = sc->sc_id | ESPCFG1_PARENB;
-#ifdef SPARC_DRIVER
- sc->sc_cfg2 = ESPCFG2_SCSI2 | ESPCFG2_RPE;
- sc->sc_cfg3 = ESPCFG3_CDB;
- ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2);
-
- if ((ESP_READ_REG(sc, ESP_CFG2) & ~ESPCFG2_RSVD) != (ESPCFG2_SCSI2 | ESPCFG2_RPE)) {
- printf(": ESP100");
- sc->sc_rev = ESP100;
- } else {
- sc->sc_cfg2 = ESPCFG2_SCSI2;
- ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2);
- sc->sc_cfg3 = 0;
- ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3);
- sc->sc_cfg3 = (ESPCFG3_CDB | ESPCFG3_FCLK);
- ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3);
- if (ESP_READ_REG(sc, ESP_CFG3) != (ESPCFG3_CDB | ESPCFG3_FCLK)) {
- printf(": ESP100A");
- sc->sc_rev = ESP100A;
- } else {
- /* ESPCFG2_FE enables > 64K transfers */
- sc->sc_cfg2 |= ESPCFG2_FE;
- sc->sc_cfg3 = 0;
- ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3);
- printf(": ESP200");
- sc->sc_rev = ESP200;
- }
- }
-#else
-#ifdef MAC68K_DRIVER
- sc->sc_cfg2 = ESPCFG2_SCSI2;
+ sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB;
+ sc->sc_cfg2 = NCRCFG2_SCSI2;
sc->sc_cfg3 = 0;
- printf(": NCR53C96");
- sc->sc_rev = NCR53C96;
-#else
- sc->sc_cfg2 = ESPCFG2_SCSI2;
- sc->sc_cfg3 = 0x4; /* Save residual byte. XXX??? */
- printf(": NCR53C94");
- sc->sc_rev = NCR53C94;
-#endif
-#endif
+ sc->sc_rev = NCR_VARIANT_NCR53C96;
/*
* This is the value used to start sync negotiations
- * Note that the ESP register "SYNCTP" is programmed
+ * Note that the NCR register "SYNCTP" is programmed
* in "clocks per byte", and has a minimum value of 4.
* The SCSI period used in negotiation is one-fourth
* of the time (in nanoseconds) needed to transfer one byte.
*/
sc->sc_minsync = 1000 / sc->sc_freq;
-#ifdef SPARC_DRIVER
- /*
- * Alas, we must now modify the value a bit, because it's
- * only valid when can switch on FASTCLK and FASTSCSI bits
- * in config register 3...
- */
- switch (sc->sc_rev) {
- case ESP100:
- sc->sc_maxxfer = 64 * 1024;
- sc->sc_minsync = 0; /* No synch on old chip? */
- break;
- case ESP100A:
- sc->sc_maxxfer = 64 * 1024;
- sc->sc_minsync = esp_cpb2stp(sc, 5); /* Min clocks/byte is 5 */
- break;
- case ESP200:
- sc->sc_maxxfer = 16 * 1024 * 1024;
- /* XXX - do actually set FAST* bits */
- }
-#else
-#ifdef MAC68K_DRIVER
sc->sc_minsync = 0; /* No synchronous xfers w/o DMA */
/* Really no limit, but since we want to fit into the TCR... */
sc->sc_maxxfer = 64 * 1024;
-#else
- sc->sc_maxxfer = 64 * 1024;
-#endif
-#endif
-
- sc->sc_ccf = FREQTOCCF(sc->sc_freq);
-
- /* The value *must not* be == 1. Make it 2 */
- if (sc->sc_ccf == 1)
- sc->sc_ccf = 2;
-
- /*
- * The recommended timeout is 250ms. This register is loaded
- * with a value calculated as follows, from the docs:
- *
- * (timout period) x (CLK frequency)
- * reg = -------------------------------------
- * 8192 x (Clock Conversion Factor)
- *
- * Since CCF has a linear relation to CLK, this generally computes
- * to the constant of 153.
- */
- sc->sc_timeout = ((250 * 1000) * sc->sc_freq) / (8192 * sc->sc_ccf);
-
- /* CCF register only has 3 bits; 0 is actually 8 */
- sc->sc_ccf &= 7;
-
- /* Reset state & bus */
- sc->sc_state = 0;
- esp_init(sc, 1);
-
- printf(" %dMhz, target %d\n", sc->sc_freq, sc->sc_id);
-
-#ifdef SPARC_DRIVER
- /* add me to the sbus structures */
- sc->sc_sd.sd_reset = (void *) esp_reset;
-#if defined(SUN4C) || defined(SUN4M)
- if (ca->ca_bustype == BUS_SBUS) {
- if (dmachild)
- sbus_establish(&sc->sc_sd, sc->sc_dev.dv_parent);
- else
- sbus_establish(&sc->sc_sd, &sc->sc_dev);
- }
-#endif /* SUN4C || SUN4M */
-#endif
-
-#ifdef SPARC_DRIVER
- /* and the interuppts */
- sc->sc_ih.ih_fun = (void *) espintr;
- sc->sc_ih.ih_arg = sc;
- intr_establish(sc->sc_pri, &sc->sc_ih);
- evcnt_attach(&sc->sc_dev, "intr", &sc->sc_intrcnt);
-#endif
-
- /*
- * fill in the prototype scsi_link.
- sc->sc_link.channel = SCSI_CHANNEL_ONLY_ONE;
- */
- sc->sc_link.adapter_softc = sc;
- sc->sc_link.adapter_target = sc->sc_id;
- sc->sc_link.adapter = &esp_switch;
- sc->sc_link.device = &esp_dev;
- sc->sc_link.openings = 2;
-
- /*
- * If the boot path is "esp" at the moment and it's me, then
- * walk our pointer to the sub-device, ready for the config
- * below.
- */
-#ifdef SPARC_DRIVER
- bp = ca->ca_ra.ra_bp;
- switch (ca->ca_bustype) {
- case BUS_SBUS:
- if (bp != NULL && strcmp(bp->name, "esp") == 0 &&
- SAME_ESP(sc, bp, ca))
- bootpath_store(1, bp + 1);
- break;
- default:
- if (bp != NULL && strcmp(bp->name, "esp") == 0 &&
- bp->val[0] == -1 && bp->val[1] == sc->sc_dev.dv_unit)
- bootpath_store(1, bp + 1);
- break;
- }
-#endif
/*
* Now try to attach all the sub-devices
*/
- config_found(self, &sc->sc_link, scsiprint);
-
-#ifdef MAC68K_DRIVER
- via2_reg(vPCR) = 0x22;
- via2_reg(vIFR) = sc->irq_mask;
- via2_reg(vIER) = 0x80 | sc->irq_mask;
-#endif
-#ifdef SPARC_DRIVER
- bootpath_store(1, NULL);
-#endif
-}
-
-/*
- * This is the generic esp reset function. It does not reset the SCSI bus,
- * only this controllers, but kills any on-going commands, and also stops
- * and resets the DMA.
- *
- * After reset, registers are loaded with the defaults from the attach
- * routine above.
- */
-void
-esp_reset(sc)
- struct esp_softc *sc;
-{
+ ncr53c9x_attach(sc, &esp_switch, &esp_dev);
- /* reset DMA first */
- DMA_RESET(sc->sc_dma);
-
- /* reset SCSI chip */
- ESPCMD(sc, ESPCMD_RSTCHIP);
- ESPCMD(sc, ESPCMD_NOP);
- DELAY(500);
-
- /* do these backwards, and fall through */
- switch (sc->sc_rev) {
-#ifndef SPARC_DRIVER
- case NCR53C96:
- case NCR53C94:
-#endif
- case ESP200:
- ESP_WRITE_REG(sc, ESP_CFG3, sc->sc_cfg3);
- case ESP100A:
- ESP_WRITE_REG(sc, ESP_CFG2, sc->sc_cfg2);
- case ESP100:
- ESP_WRITE_REG(sc, ESP_CFG1, sc->sc_cfg1);
- ESP_WRITE_REG(sc, ESP_CCF, sc->sc_ccf);
- ESP_WRITE_REG(sc, ESP_SYNCOFF, 0);
- ESP_WRITE_REG(sc, ESP_TIMEOUT, sc->sc_timeout);
- break;
- default:
- printf("%s: unknown revision code, assuming ESP100\n",
- sc->sc_dev.dv_xname);
- ESP_WRITE_REG(sc, ESP_CFG1, sc->sc_cfg1);
- ESP_WRITE_REG(sc, ESP_CCF, sc->sc_ccf);
- ESP_WRITE_REG(sc, ESP_SYNCOFF, 0);
- ESP_WRITE_REG(sc, ESP_TIMEOUT, sc->sc_timeout);
- }
-}
-
-/*
- * Reset the SCSI bus, but not the chip
- */
-void
-esp_scsi_reset(sc)
- struct esp_softc *sc;
-{
-#ifdef SPARC_DRIVER
- /* stop DMA first, as the chip will return to Bus Free phase */
- DMACSR(sc->sc_dma) &= ~D_EN_DMA;
-#else
/*
- * XXX STOP DMA FIRST
+ * Configure interrupts.
*/
-#endif
-
- printf("esp: resetting SCSI bus\n");
- ESPCMD(sc, ESPCMD_RSTSCSI);
-}
-
-/*
- * Initialize esp state machine
- */
-void
-esp_init(sc, doreset)
- struct esp_softc *sc;
- int doreset;
-{
- struct esp_ecb *ecb;
- int r;
-
- ESP_TRACE(("[ESP_INIT(%d)] ", doreset));
-
- if (sc->sc_state == 0) {
- /* First time through; initialize. */
- TAILQ_INIT(&sc->ready_list);
- TAILQ_INIT(&sc->nexus_list);
- TAILQ_INIT(&sc->free_list);
- sc->sc_nexus = NULL;
- ecb = sc->sc_ecb;
- bzero(ecb, sizeof(sc->sc_ecb));
- for (r = 0; r < sizeof(sc->sc_ecb) / sizeof(*ecb); r++) {
- TAILQ_INSERT_TAIL(&sc->free_list, ecb, chain);
- ecb++;
- }
- bzero(sc->sc_tinfo, sizeof(sc->sc_tinfo));
- } else {
- /* Cancel any active commands. */
- sc->sc_state = ESP_CLEANING;
- if ((ecb = sc->sc_nexus) != NULL) {
- ecb->xs->error = XS_DRIVER_STUFFUP;
- untimeout(esp_timeout, ecb);
- esp_done(sc, ecb);
- }
- while ((ecb = sc->nexus_list.tqh_first) != NULL) {
- ecb->xs->error = XS_DRIVER_STUFFUP;
- untimeout(esp_timeout, ecb);
- esp_done(sc, ecb);
- }
- }
-
- /*
- * reset the chip to a known state
- */
- esp_reset(sc);
-
- sc->sc_phase = sc->sc_prevphase = INVALID_PHASE;
- for (r = 0; r < 8; r++) {
- struct esp_tinfo *ti = &sc->sc_tinfo[r];
-/* XXX - config flags per target: low bits: no reselect; high bits: no synch */
- int fl = sc->sc_dev.dv_cfdata->cf_flags;
-
- ti->flags = ((sc->sc_minsync && !(fl & (1<<(r+8))))
- ? T_NEGOTIATE : 0) |
- ((fl & (1<<r)) ? T_RSELECTOFF : 0) |
- T_NEED_TO_RESET;
- ti->period = sc->sc_minsync;
- ti->offset = 0;
- }
-
- if (doreset) {
- sc->sc_state = ESP_SBR;
- ESPCMD(sc, ESPCMD_RSTSCSI);
- } else {
- sc->sc_state = ESP_IDLE;
- }
-}
-
-/*
- * Read the ESP registers, and save their contents for later use.
- * ESP_STAT, ESP_STEP & ESP_INTR are mostly zeroed out when reading
- * ESP_INTR - so make sure it is the last read.
- *
- * I think that (from reading the docs) most bits in these registers
- * only make sense when he DMA CSR has an interrupt showing. Call only
- * if an interrupt is pending.
- */
-void
-espreadregs(sc)
- struct esp_softc *sc;
-{
-
- sc->sc_espstat = ESP_READ_REG(sc, ESP_STAT);
- /* Only the stepo bits are of interest */
- sc->sc_espstep = ESP_READ_REG(sc, ESP_STEP) & ESPSTEP_MASK;
- sc->sc_espintr = ESP_READ_REG(sc, ESP_INTR);
-
-#if !defined(SPARC_DRIVER) && !defined(MAC68K_DRIVER)
- /* Clear the TCDS interrupt bit. */
- (void)tcds_scsi_isintr(sc->sc_dma, 1);
-#endif
-
- /*
- * Determine the SCSI bus phase, return either a real SCSI bus phase
- * or some pseudo phase we use to detect certain exceptions.
- */
-
- sc->sc_phase = (sc->sc_espintr & ESPINTR_DIS)
- ? /* Disconnected */ BUSFREE_PHASE
- : sc->sc_espstat & ESPSTAT_PHASE;
-
- ESP_MISC(("regs[intr=%02x,stat=%02x,step=%02x] ",
- sc->sc_espintr, sc->sc_espstat, sc->sc_espstep));
-}
-
-/*
- * Convert chip register Clock Per Byte value to Synchronous Transfer Period.
- */
-static __inline int
-esp_cpb2stp(sc, cpb)
- struct esp_softc *sc;
- int cpb;
-{
- return ((250 * cpb) / sc->sc_freq);
+ via2_reg(vPCR) = 0x22;
+ via2_reg(vIFR) = esc->irq_mask;
+ via2_reg(vIER) = 0x80 | esc->irq_mask;
}
/*
- * Convert Synchronous Transfer Period to chip register Clock Per Byte value.
+ * Glue functions.
*/
-static __inline int
-esp_stp2cpb(sc, period)
- struct esp_softc *sc;
- int period;
-{
- int v;
- v = (sc->sc_freq * period) / 250;
- if (esp_cpb2stp(sc, v) < period)
- /* Correct round-down error */
- v++;
- return v;
-}
-static __inline void
-esp_setsync(sc, ti)
- struct esp_softc *sc;
- struct esp_tinfo *ti;
+u_char
+esp_read_reg(sc, reg)
+ struct ncr53c9x_softc *sc;
+ int reg;
{
+ struct esp_softc *esc = (struct esp_softc *)sc;
- if (ti->flags & T_SYNCMODE) {
- ESP_WRITE_REG(sc, ESP_SYNCOFF, ti->offset);
- ESP_WRITE_REG(sc, ESP_SYNCTP, esp_stp2cpb(sc, ti->period));
- } else {
- ESP_WRITE_REG(sc, ESP_SYNCOFF, 0);
- ESP_WRITE_REG(sc, ESP_SYNCTP, 0);
- }
-}
-
-/*
- * Send a command to a target, set the driver state to ESP_SELECTING
- * and let the caller take care of the rest.
- *
- * Keeping this as a function allows me to say that this may be done
- * by DMA instead of programmed I/O soon.
- */
-void
-esp_select(sc, ecb)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
-{
- struct scsi_link *sc_link = ecb->xs->sc_link;
- int target = sc_link->target;
- struct esp_tinfo *ti = &sc->sc_tinfo[target];
- u_char *cmd;
- int clen;
-
- ESP_TRACE(("[esp_select(t%d,l%d,cmd:%x)] ", sc_link->target, sc_link->lun, ecb->cmd.opcode));
-
- /* new state ESP_SELECTING */
- sc->sc_state = ESP_SELECTING;
-
- ESPCMD(sc, ESPCMD_FLUSH);
-
- /*
- * The docs say the target register is never reset, and I
- * can't think of a better place to set it
- */
- ESP_WRITE_REG(sc, ESP_SELID, target);
- esp_setsync(sc, ti);
-
- /*
- * Who am I. This is where we tell the target that we are
- * happy for it to disconnect etc.
- */
- ESP_WRITE_REG(sc, ESP_FIFO,
- MSG_IDENTIFY(sc_link->lun, (ti->flags & T_RSELECTOFF)?0:1));
-
- if (ti->flags & T_NEGOTIATE) {
- /* Arbitrate, select and stop after IDENTIFY message */
- ESPCMD(sc, ESPCMD_SELATNS);
- return;
- }
-
- /* Now the command into the FIFO */
- cmd = (u_char *)&ecb->cmd;
- clen = ecb->clen;
- while (clen--)
- ESP_WRITE_REG(sc, ESP_FIFO, *cmd++);
-
- /* And get the targets attention */
- ESPCMD(sc, ESPCMD_SELATN);
+ return esc->sc_reg[reg * 16];
}
void
-esp_free_ecb(sc, ecb, flags)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
- int flags;
-{
- int s;
-
- s = splbio();
-
- ecb->flags = 0;
- TAILQ_INSERT_HEAD(&sc->free_list, ecb, chain);
-
- /*
- * If there were none, wake anybody waiting for one to come free,
- * starting with queued entries.
- */
- if (ecb->chain.tqe_next == 0)
- wakeup(&sc->free_list);
-
- splx(s);
-}
-
-struct esp_ecb *
-esp_get_ecb(sc, flags)
- struct esp_softc *sc;
- int flags;
-{
- struct esp_ecb *ecb;
- int s;
-
- s = splbio();
-
- while ((ecb = sc->free_list.tqh_first) == NULL &&
- (flags & SCSI_NOSLEEP) == 0)
- tsleep(&sc->free_list, PRIBIO, "especb", 0);
- if (ecb) {
- TAILQ_REMOVE(&sc->free_list, ecb, chain);
- ecb->flags |= ECB_ALLOC;
- }
-
- splx(s);
- return ecb;
-}
-
-/*
- * DRIVER FUNCTIONS CALLABLE FROM HIGHER LEVEL DRIVERS
- */
-
-/*
- * Start a SCSI-command
- * This function is called by the higher level SCSI-driver to queue/run
- * SCSI-commands.
- */
-int
-esp_scsi_cmd(xs)
- struct scsi_xfer *xs;
+esp_write_reg(sc, reg, val)
+ struct ncr53c9x_softc *sc;
+ int reg;
+ u_char val;
{
- struct scsi_link *sc_link = xs->sc_link;
- struct esp_softc *sc = sc_link->adapter_softc;
- struct esp_ecb *ecb;
- int s, flags;
-
- ESP_TRACE(("[esp_scsi_cmd] "));
- ESP_CMDS(("[0x%x, %d]->%d ", (int)xs->cmd->opcode, xs->cmdlen,
- sc_link->target));
-
- flags = xs->flags;
- if ((ecb = esp_get_ecb(sc, flags)) == NULL) {
- xs->error = XS_DRIVER_STUFFUP;
- return TRY_AGAIN_LATER;
- }
-
- /* Initialize ecb */
- ecb->xs = xs;
- ecb->timeout = xs->timeout;
-
- if (xs->flags & SCSI_RESET) {
- ecb->flags |= ECB_RESET;
- ecb->clen = 0;
- ecb->dleft = 0;
- } else {
- bcopy(xs->cmd, &ecb->cmd, xs->cmdlen);
- ecb->clen = xs->cmdlen;
- ecb->daddr = xs->data;
- ecb->dleft = xs->datalen;
- }
- ecb->stat = 0;
-
- s = splbio();
-
- TAILQ_INSERT_TAIL(&sc->ready_list, ecb, chain);
- if (sc->sc_state == ESP_IDLE)
- esp_sched(sc);
-
- splx(s);
+ struct esp_softc *esc = (struct esp_softc *)sc;
+ u_char v = val;
- if ((flags & SCSI_POLL) == 0)
- return SUCCESSFULLY_QUEUED;
-
- /* Not allowed to use interrupts, use polling instead */
- if (esp_poll(sc, xs, ecb->timeout)) {
- esp_timeout(ecb);
- if (esp_poll(sc, xs, ecb->timeout))
- esp_timeout(ecb);
+ if (reg == NCR_CMD && v == (NCRCMD_TRANS|NCRCMD_DMA)) {
+ v = NCRCMD_TRANS;
}
- return COMPLETE;
+ esc->sc_reg[reg * 16] = v;
}
-/*
- * Used when interrupt driven I/O isn't allowed, e.g. during boot.
- */
int
-esp_poll(sc, xs, count)
- struct esp_softc *sc;
- struct scsi_xfer *xs;
- int count;
-{
-
- ESP_TRACE(("[esp_poll] "));
- while (count) {
- if (DMA_ISINTR(sc->sc_dma)) {
- espintr(sc);
- }
-#if alternatively
- if (ESP_READ_REG(sc, ESP_STAT) & ESPSTAT_INT)
- espintr(sc);
-#endif
- if ((xs->flags & ITSDONE) != 0)
- return 0;
- if (sc->sc_state == ESP_IDLE) {
- ESP_TRACE(("[esp_poll: rescheduling] "));
- esp_sched(sc);
- }
- DELAY(1000);
- count--;
- }
- return 1;
-}
-
-
-/*
- * LOW LEVEL SCSI UTILITIES
- */
-
-/*
- * Schedule a scsi operation. This has now been pulled out of the interrupt
- * handler so that we may call it from esp_scsi_cmd and esp_done. This may
- * save us an unecessary interrupt just to get things going. Should only be
- * called when state == ESP_IDLE and at bio pl.
- */
-void
-esp_sched(sc)
- struct esp_softc *sc;
-{
- struct esp_ecb *ecb;
- struct scsi_link *sc_link;
- struct esp_tinfo *ti;
-
- ESP_TRACE(("[esp_sched] "));
- if (sc->sc_state != ESP_IDLE)
- panic("esp_sched: not IDLE (state=%d)", sc->sc_state);
-
- /*
- * Find first ecb in ready queue that is for a target/lunit
- * combinations that is not busy.
- */
- for (ecb = sc->ready_list.tqh_first; ecb; ecb = ecb->chain.tqe_next) {
- sc_link = ecb->xs->sc_link;
- ti = &sc->sc_tinfo[sc_link->target];
- if ((ti->lubusy & (1 << sc_link->lun)) == 0) {
- TAILQ_REMOVE(&sc->ready_list, ecb, chain);
- sc->sc_nexus = ecb;
- esp_select(sc, ecb);
- break;
- } else
- ESP_MISC(("%d:%d busy\n",
- sc_link->target, sc_link->lun));
- }
-}
-
-void
-esp_sense(sc, ecb)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
+esp_dma_isintr(sc)
+ struct ncr53c9x_softc *sc;
{
- struct scsi_xfer *xs = ecb->xs;
- struct scsi_link *sc_link = xs->sc_link;
- struct esp_tinfo *ti = &sc->sc_tinfo[sc_link->target];
- struct scsi_sense *ss = (void *)&ecb->cmd;
+ struct esp_softc *esc = (struct esp_softc *)sc;
- ESP_MISC(("requesting sense "));
- /* Next, setup a request sense command block */
- bzero(ss, sizeof(*ss));
- ss->opcode = REQUEST_SENSE;
- ss->byte2 = sc_link->lun << 5;
- ss->length = sizeof(struct scsi_sense_data);
- ecb->clen = sizeof(*ss);
- ecb->daddr = (char *)&xs->sense;
- ecb->dleft = sizeof(struct scsi_sense_data);
- ecb->flags |= ECB_SENSE;
- ti->senses++;
- if (ecb->flags & ECB_NEXUS)
- ti->lubusy &= ~(1 << sc_link->lun);
- if (ecb == sc->sc_nexus) {
- esp_select(sc, ecb);
- } else {
- esp_dequeue(sc, ecb);
- TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain);
- if (sc->sc_state == ESP_IDLE)
- esp_sched(sc);
- }
+ return esc->sc_reg[NCR_STAT * 16] & 0x80;
}
-/*
- * POST PROCESSING OF SCSI_CMD (usually current)
- */
void
-esp_done(sc, ecb)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
+esp_dma_reset(sc)
+ struct ncr53c9x_softc *sc;
{
- struct scsi_xfer *xs = ecb->xs;
- struct scsi_link *sc_link = xs->sc_link;
- struct esp_tinfo *ti = &sc->sc_tinfo[sc_link->target];
+ struct esp_softc *esc = (struct esp_softc *)sc;
- ESP_TRACE(("[esp_done(error:%x)] ", xs->error));
-
- /*
- * Now, if we've come here with no error code, i.e. we've kept the
- * initial XS_NOERROR, and the status code signals that we should
- * check sense, we'll need to set up a request sense cmd block and
- * push the command back into the ready queue *before* any other
- * commands for this target/lunit, else we lose the sense info.
- * We don't support chk sense conditions for the request sense cmd.
- */
- if (xs->error == XS_NOERROR) {
- if ((ecb->flags & ECB_ABORT) != 0) {
- xs->error = XS_DRIVER_STUFFUP;
- } else if ((ecb->flags & ECB_SENSE) != 0) {
- xs->error = XS_SENSE;
- } else if ((ecb->stat & ST_MASK) == SCSI_CHECK) {
- /* First, save the return values */
- xs->resid = ecb->dleft;
- xs->status = ecb->stat;
- esp_sense(sc, ecb);
- return;
- } else {
- xs->resid = ecb->dleft;
- }
- }
-
- xs->flags |= ITSDONE;
-
-#if ESP_DEBUG > 0
- if (esp_debug & ESP_SHOWMISC) {
- if (xs->resid != 0)
- printf("resid=%d ", xs->resid);
- if (xs->error == XS_SENSE)
- printf("sense=0x%02x\n", xs->sense.error_code);
- else
- printf("error=%d\n", xs->error);
- }
-#endif
-
- /*
- * Remove the ECB from whatever queue it's on.
- */
- if (ecb->flags & ECB_NEXUS)
- ti->lubusy &= ~(1 << sc_link->lun);
- if (ecb == sc->sc_nexus) {
- sc->sc_nexus = NULL;
- sc->sc_state = ESP_IDLE;
- esp_sched(sc);
- } else
- esp_dequeue(sc, ecb);
-
- esp_free_ecb(sc, ecb, xs->flags);
- ti->cmds++;
- scsi_done(xs);
+ esc->sc_active = 0;
+ esc->sc_tc = 0;
}
-void
-esp_dequeue(sc, ecb)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
-{
-
- if (ecb->flags & ECB_NEXUS) {
- TAILQ_REMOVE(&sc->nexus_list, ecb, chain);
- } else {
- TAILQ_REMOVE(&sc->ready_list, ecb, chain);
- }
-}
-
-/*
- * INTERRUPT/PROTOCOL ENGINE
- */
-
-/*
- * Schedule an outgoing message by prioritizing it, and asserting
- * attention on the bus. We can only do this when we are the initiator
- * else there will be an illegal command interrupt.
- */
-#define esp_sched_msgout(m) \
- do { \
- ESP_MISC(("esp_sched_msgout %d ", m)); \
- ESPCMD(sc, ESPCMD_SETATN); \
- sc->sc_flags |= ESP_ATN; \
- sc->sc_msgpriq |= (m); \
- } while (0)
-
int
-esp_reselect(sc, message)
- struct esp_softc *sc;
- int message;
+esp_dma_intr(sc)
+ struct ncr53c9x_softc *sc;
{
- u_char selid, target, lun;
- struct esp_ecb *ecb;
- struct scsi_link *sc_link;
- struct esp_tinfo *ti;
-
- /*
- * The SCSI chip made a snapshot of the data bus while the reselection
- * was being negotiated. This enables us to determine which target did
- * the reselect.
- */
- selid = sc->sc_selid & ~(1 << sc->sc_id);
- if (selid & (selid - 1)) {
- printf("%s: reselect with invalid selid %02x; sending DEVICE RESET\n",
- sc->sc_dev.dv_xname, selid);
- goto reset;
- }
-
- /*
- * Search wait queue for disconnected cmd
- * The list should be short, so I haven't bothered with
- * any more sophisticated structures than a simple
- * singly linked list.
- */
- target = ffs(selid) - 1;
- lun = message & 0x07;
- for (ecb = sc->nexus_list.tqh_first; ecb != NULL;
- ecb = ecb->chain.tqe_next) {
- sc_link = ecb->xs->sc_link;
- if (sc_link->target == target && sc_link->lun == lun)
- break;
- }
- if (ecb == NULL) {
- printf("%s: reselect from target %d lun %d with no nexus; sending ABORT\n",
- sc->sc_dev.dv_xname, target, lun);
- goto abort;
- }
-
- /* Make this nexus active again. */
- TAILQ_REMOVE(&sc->nexus_list, ecb, chain);
- sc->sc_state = ESP_CONNECTED;
- sc->sc_nexus = ecb;
- ti = &sc->sc_tinfo[target];
- ti->lubusy |= (1 << lun);
- esp_setsync(sc, ti);
-
- if (ecb->flags & ECB_RESET)
- esp_sched_msgout(SEND_DEV_RESET);
- else if (ecb->flags & ECB_ABORT)
- esp_sched_msgout(SEND_ABORT);
-
- /* Do an implicit RESTORE POINTERS. */
- sc->sc_dp = ecb->daddr;
- sc->sc_dleft = ecb->dleft;
-
- return (0);
-
-reset:
- esp_sched_msgout(SEND_DEV_RESET);
- return (1);
-
-abort:
- esp_sched_msgout(SEND_ABORT);
- return (1);
-}
-
-#define IS1BYTEMSG(m) (((m) != 1 && (m) < 0x20) || (m) & 0x80)
-#define IS2BYTEMSG(m) (((m) & 0xf0) == 0x20)
-#define ISEXTMSG(m) ((m) == 1)
-
-/*
- * Get an incoming message as initiator.
- *
- * The SCSI bus must already be in MESSAGE_IN_PHASE and there is a
- * byte in the FIFO
- */
-void
-esp_msgin(sc)
- register struct esp_softc *sc;
-{
- register int v;
-
- ESP_TRACE(("[esp_msgin(curmsglen:%d)] ", sc->sc_imlen));
-
- if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) == 0) {
- printf("%s: msgin: no msg byte available\n",
- sc->sc_dev.dv_xname);
- return;
- }
-
- /*
- * Prepare for a new message. A message should (according
- * to the SCSI standard) be transmitted in one single
- * MESSAGE_IN_PHASE. If we have been in some other phase,
- * then this is a new message.
- */
- if (sc->sc_prevphase != MESSAGE_IN_PHASE) {
- sc->sc_flags &= ~ESP_DROP_MSGI;
- sc->sc_imlen = 0;
- }
-
- v = ESP_READ_REG(sc, ESP_FIFO);
- ESP_MISC(("<msgbyte:0x%02x>", v));
+ register struct esp_softc *esc = (struct esp_softc *)sc;
+ register u_char *p;
+ volatile u_char *cmdreg, *intrreg, *statreg, *fiforeg;
+ register u_int espphase, espstat, espintr;
+ register int cnt;
-#if 0
- if (sc->sc_state == ESP_RESELECTED && sc->sc_imlen == 0) {
- /*
- * Which target is reselecting us? (The ID bit really)
- */
- sc->sc_selid = v;
- ESP_MISC(("selid=0x%2x ", sc->sc_selid));
- return;
+ if (esc->sc_active == 0) {
+ printf("dma_intr--inactive DMA\n");
+ return -1;
}
-#endif
-
- sc->sc_imess[sc->sc_imlen] = v;
- /*
- * If we're going to reject the message, don't bother storing
- * the incoming bytes. But still, we need to ACK them.
- */
-
- if ((sc->sc_flags & ESP_DROP_MSGI)) {
- ESPCMD(sc, ESPCMD_MSGOK);
- printf("<dropping msg byte %x>",
- sc->sc_imess[sc->sc_imlen]);
- return;
+ if ((sc->sc_espintr & NCRINTR_BS) == 0) {
+ esc->sc_active = 0;
+ return 0;
}
- if (sc->sc_imlen >= ESP_MAX_MSG_LEN) {
- esp_sched_msgout(SEND_REJECT);
- sc->sc_flags |= ESP_DROP_MSGI;
- } else {
- sc->sc_imlen++;
- /*
- * This testing is suboptimal, but most
- * messages will be of the one byte variety, so
- * it should not effect performance
- * significantly.
- */
- if (sc->sc_imlen == 1 && IS1BYTEMSG(sc->sc_imess[0]))
- goto gotit;
- if (sc->sc_imlen == 2 && IS2BYTEMSG(sc->sc_imess[0]))
- goto gotit;
- if (sc->sc_imlen >= 3 && ISEXTMSG(sc->sc_imess[0]) &&
- sc->sc_imlen == sc->sc_imess[1] + 2)
- goto gotit;
+ cnt = *esc->sc_pdmalen;
+ if (*esc->sc_pdmalen == 0) {
+ printf("data interrupt, but no count left.");
}
- /* Ack what we have so far */
- ESPCMD(sc, ESPCMD_MSGOK);
- return;
-
-gotit:
- ESP_MSGS(("gotmsg(%x)", sc->sc_imess[0]));
- /*
- * Now we should have a complete message (1 byte, 2 byte
- * and moderately long extended messages). We only handle
- * extended messages which total length is shorter than
- * ESP_MAX_MSG_LEN. Longer messages will be amputated.
- */
- switch (sc->sc_state) {
- struct esp_ecb *ecb;
- struct esp_tinfo *ti;
- case ESP_CONNECTED:
- ecb = sc->sc_nexus;
- ti = &sc->sc_tinfo[ecb->xs->sc_link->target];
-
- switch (sc->sc_imess[0]) {
- case MSG_CMDCOMPLETE:
- ESP_MSGS(("cmdcomplete "));
- if (sc->sc_dleft < 0) {
- struct scsi_link *sc_link = ecb->xs->sc_link;
- printf("%s: %d extra bytes from %d:%d\n",
- sc->sc_dev.dv_xname, -sc->sc_dleft,
- sc_link->target, sc_link->lun);
- sc->sc_dleft = 0;
- }
- ecb->xs->resid = ecb->dleft = sc->sc_dleft;
- sc->sc_state = ESP_CMDCOMPLETE;
- break;
-
- case MSG_MESSAGE_REJECT:
- if (esp_debug & ESP_SHOWMSGS)
- printf("%s: our msg rejected by target\n",
- sc->sc_dev.dv_xname);
- switch (sc->sc_msgout) {
- case SEND_SDTR:
- sc->sc_flags &= ~ESP_SYNCHNEGO;
- ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE);
- esp_setsync(sc, ti);
- break;
- case SEND_INIT_DET_ERR:
- goto abort;
+ p = *esc->sc_dmaaddr;
+ espphase = sc->sc_phase;
+ espstat = (u_int) sc->sc_espstat;
+ espintr = (u_int) sc->sc_espintr;
+ cmdreg = esc->sc_reg + NCR_CMD * 16;
+ fiforeg = esc->sc_reg + NCR_FIFO * 16;
+ statreg = esc->sc_reg + NCR_STAT * 16;
+ intrreg = esc->sc_reg + NCR_INTR * 16;
+ do {
+ if (esc->sc_datain) {
+ *p++ = *fiforeg;
+ cnt--;
+ if (espphase == DATA_IN_PHASE) {
+ *cmdreg = NCRCMD_TRANS;
+ } else {
+ esc->sc_active = 0;
}
- break;
-
- case MSG_NOOP:
- ESP_MSGS(("noop "));
- break;
-
- case MSG_DISCONNECT:
- ESP_MSGS(("disconnect "));
- ti->dconns++;
- sc->sc_state = ESP_DISCONNECT;
- if ((ecb->xs->sc_link->quirks & SDEV_AUTOSAVE) == 0)
- break;
- /*FALLTHROUGH*/
-
- case MSG_SAVEDATAPOINTER:
- ESP_MSGS(("save datapointer "));
- ecb->daddr = sc->sc_dp;
- ecb->dleft = sc->sc_dleft;
- break;
-
- case MSG_RESTOREPOINTERS:
- ESP_MSGS(("restore datapointer "));
- sc->sc_dp = ecb->daddr;
- sc->sc_dleft = ecb->dleft;
- break;
-
- case MSG_EXTENDED:
- ESP_MSGS(("extended(%x) ", sc->sc_imess[2]));
- switch (sc->sc_imess[2]) {
- case MSG_EXT_SDTR:
- ESP_MSGS(("SDTR period %d, offset %d ",
- sc->sc_imess[3], sc->sc_imess[4]));
- if (sc->sc_imess[1] != 3)
- goto reject;
- ti->period = sc->sc_imess[3];
- ti->offset = sc->sc_imess[4];
- ti->flags &= ~T_NEGOTIATE;
- if (sc->sc_minsync == 0 ||
- ti->offset == 0 ||
- ti->period > 124) {
- printf("%s:%d: async\n", "esp",
- ecb->xs->sc_link->target);
- if ((sc->sc_flags&ESP_SYNCHNEGO) == 0) {
- /* target initiated negotiation */
- ti->offset = 0;
- ti->flags &= ~T_SYNCMODE;
- esp_sched_msgout(SEND_SDTR);
- } else {
- /* we are async */
- ti->flags &= ~T_SYNCMODE;
- }
- } else {
- int r = 250/ti->period;
- int s = (100*250)/ti->period - 100*r;
- int p;
-
- p = esp_stp2cpb(sc, ti->period);
- ti->period = esp_cpb2stp(sc, p);
-#ifdef ESP_DEBUG
- sc_print_addr(ecb->xs->sc_link);
- printf("max sync rate %d.%02dMb/s\n",
- r, s);
-#endif
- if ((sc->sc_flags&ESP_SYNCHNEGO) == 0) {
- /* target initiated negotiation */
- if (ti->period < sc->sc_minsync)
- ti->period = sc->sc_minsync;
- if (ti->offset > 15)
- ti->offset = 15;
- ti->flags &= ~T_SYNCMODE;
- esp_sched_msgout(SEND_SDTR);
- } else {
- /* we are sync */
- ti->flags |= T_SYNCMODE;
- }
- }
- sc->sc_flags &= ~ESP_SYNCHNEGO;
- esp_setsync(sc, ti);
- break;
-
- default:
- printf("%s: unrecognized MESSAGE EXTENDED; sending REJECT\n",
- sc->sc_dev.dv_xname);
- goto reject;
+ } else {
+ if ( (espphase == DATA_OUT_PHASE)
+ || (espphase == MESSAGE_OUT_PHASE)) {
+ *fiforeg = *p++;
+ cnt--;
+ *cmdreg = NCRCMD_TRANS;
+ } else {
+ esc->sc_active = 0;
}
- break;
-
- default:
- ESP_MSGS(("ident "));
- printf("%s: unrecognized MESSAGE; sending REJECT\n",
- sc->sc_dev.dv_xname);
- reject:
- esp_sched_msgout(SEND_REJECT);
- break;
- }
- break;
-
- case ESP_RESELECTED:
- if (!MSG_ISIDENTIFY(sc->sc_imess[0])) {
- printf("%s: reselect without IDENTIFY; sending DEVICE RESET\n",
- sc->sc_dev.dv_xname);
- goto reset;
}
- (void) esp_reselect(sc, sc->sc_imess[0]);
- break;
-
- default:
- printf("%s: unexpected MESSAGE IN; sending DEVICE RESET\n",
- sc->sc_dev.dv_xname);
- reset:
- esp_sched_msgout(SEND_DEV_RESET);
- break;
-
- abort:
- esp_sched_msgout(SEND_ABORT);
- break;
- }
-
- /* Ack last message byte */
- ESPCMD(sc, ESPCMD_MSGOK);
-
- /* Done, reset message pointer. */
- sc->sc_flags &= ~ESP_DROP_MSGI;
- sc->sc_imlen = 0;
-}
-
-
-/*
- * Send the highest priority, scheduled message
- */
-void
-esp_msgout(sc)
- register struct esp_softc *sc;
-{
- struct esp_tinfo *ti;
- struct esp_ecb *ecb;
- size_t size;
-
- ESP_TRACE(("[esp_msgout(priq:%x, prevphase:%x)]", sc->sc_msgpriq, sc->sc_prevphase));
-
- if (sc->sc_flags & ESP_ATN) {
- if (sc->sc_prevphase != MESSAGE_OUT_PHASE) {
- new:
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- sc->sc_msgoutq = 0;
- sc->sc_omlen = 0;
- }
- } else {
- if (sc->sc_prevphase == MESSAGE_OUT_PHASE) {
- esp_sched_msgout(sc->sc_msgoutq);
- goto new;
- } else {
- printf("esp at line %d: unexpected MESSAGE OUT phase\n", __LINE__);
- }
- }
-
- if (sc->sc_omlen == 0) {
- /* Pick up highest priority message */
- sc->sc_msgout = sc->sc_msgpriq & -sc->sc_msgpriq;
- sc->sc_msgoutq |= sc->sc_msgout;
- sc->sc_msgpriq &= ~sc->sc_msgout;
- sc->sc_omlen = 1; /* "Default" message len */
- switch (sc->sc_msgout) {
- case SEND_SDTR:
- ecb = sc->sc_nexus;
- ti = &sc->sc_tinfo[ecb->xs->sc_link->target];
- sc->sc_omess[0] = MSG_EXTENDED;
- sc->sc_omess[1] = 3;
- sc->sc_omess[2] = MSG_EXT_SDTR;
- sc->sc_omess[3] = ti->period;
- sc->sc_omess[4] = ti->offset;
- sc->sc_omlen = 5;
- if ((sc->sc_flags & ESP_SYNCHNEGO) == 0) {
- ti->flags |= T_SYNCMODE;
- esp_setsync(sc, ti);
- }
- break;
- case SEND_IDENTIFY:
- if (sc->sc_state != ESP_CONNECTED) {
- printf("esp at line %d: no nexus\n", __LINE__);
- }
- ecb = sc->sc_nexus;
- sc->sc_omess[0] = MSG_IDENTIFY(ecb->xs->sc_link->lun,0);
- break;
- case SEND_DEV_RESET:
- sc->sc_flags |= ESP_ABORTING;
- sc->sc_omess[0] = MSG_BUS_DEV_RESET;
- ecb = sc->sc_nexus;
- ti = &sc->sc_tinfo[ecb->xs->sc_link->target];
- ti->flags &= ~T_SYNCMODE;
- ti->flags |= T_NEGOTIATE;
- break;
- case SEND_PARITY_ERROR:
- sc->sc_omess[0] = MSG_PARITY_ERROR;
- break;
- case SEND_ABORT:
- sc->sc_flags |= ESP_ABORTING;
- sc->sc_omess[0] = MSG_ABORT;
- break;
- case SEND_INIT_DET_ERR:
- sc->sc_omess[0] = MSG_INITIATOR_DET_ERR;
- break;
- case SEND_REJECT:
- sc->sc_omess[0] = MSG_MESSAGE_REJECT;
- break;
- default:
- ESPCMD(sc, ESPCMD_RSTATN);
- sc->sc_flags &= ~ESP_ATN;
- sc->sc_omess[0] = MSG_NOOP;
- break;
+ if (esc->sc_active) {
+ while (!(*statreg & 0x80));
+ espstat = *statreg;
+ espintr = *intrreg;
+ espphase = (espintr & NCRINTR_DIS)
+ ? /* Disconnected */ BUSFREE_PHASE
+ : espstat & PHASE_MASK;
}
- sc->sc_omp = sc->sc_omess;
- }
-
-#if 1
- /* (re)send the message */
- size = min(sc->sc_omlen, sc->sc_maxxfer);
- DMA_SETUP(sc->sc_dma, &sc->sc_omp, &sc->sc_omlen, 0, &size);
-#ifndef MAC68K_DRIVER
- /* Program the SCSI counter */
- ESP_WRITE_REG(sc, ESP_TCL, size);
- ESP_WRITE_REG(sc, ESP_TCM, size >> 8);
- if (sc->sc_cfg2 & ESPCFG2_FE) {
- ESP_WRITE_REG(sc, ESP_TCH, size >> 16);
- }
- /* load the count in */
- ESPCMD(sc, ESPCMD_NOP|ESPCMD_DMA);
-#endif
- ESPCMD(sc, ESPCMD_TRANS|ESPCMD_DMA);
- DMA_GO(sc->sc_dma);
-#else
- { int i;
- for (i = 0; i < sc->sc_omlen; i++)
- ESP_WRITE_REG(sc, FIFO, sc->sc_omess[i]);
- ESPCMD(sc, ESPCMD_TRANS);
- sc->sc_omlen = 0;
- }
-#endif
+ } while (esc->sc_active && (espintr & NCRINTR_BS));
+ sc->sc_phase = espphase;
+ sc->sc_espstat = (u_char) espstat;
+ sc->sc_espintr = (u_char) espintr;
+ *esc->sc_dmaaddr = p;
+ *esc->sc_pdmalen = cnt;
+
+ if (*esc->sc_pdmalen == 0) {
+ esc->sc_tc = NCRSTAT_TC;
+ }
+ sc->sc_espstat |= esc->sc_tc;
+ return 0;
}
-/*
- * This is the most critical part of the driver, and has to know
- * how to deal with *all* error conditions and phases from the SCSI
- * bus. If there are no errors and the DMA was active, then call the
- * DMA pseudo-interrupt handler. If this returns 1, then that was it
- * and we can return from here without further processing.
- *
- * Most of this needs verifying.
- */
int
-espintr(sc)
- register struct esp_softc *sc;
+esp_dma_setup(sc, addr, len, datain, dmasize)
+ struct ncr53c9x_softc *sc;
+ caddr_t *addr;
+ size_t *len;
+ int datain;
+ size_t *dmasize;
{
- register struct esp_ecb *ecb;
- register struct scsi_link *sc_link;
- struct esp_tinfo *ti;
- int loop;
- size_t size;
-
- ESP_TRACE(("[espintr]"));
-
- /*
- * I have made some (maybe seriously flawed) assumptions here,
- * but basic testing (uncomment the printf() below), show that
- * certainly something happens when this loop is here.
- *
- * The idea is that many of the SCSI operations take very little
- * time, and going away and getting interrupted is too high an
- * overhead to pay. For example, selecting, sending a message
- * and command and then doing some work can be done in one "pass".
- *
- * The DELAY is not variable because I do not understand that the
- * DELAY loop should be fixed-time regardless of CPU speed, but
- * I am *assuming* that the faster SCSI processors get things done
- * quicker (sending a command byte etc), and so there is no
- * need to be too slow.
- *
- * This is a heuristic. It is 2 when at 20Mhz, 2 at 25Mhz and 1
- * at 40Mhz. This needs testing.
- */
- for (loop = 0; 1;loop++, DELAY(50/sc->sc_freq)) {
- /* a feeling of deja-vu */
- if (!DMA_ISINTR(sc->sc_dma))
- return (loop != 0);
-#if 0
- if (loop)
- printf("*");
-#endif
-
- /* and what do the registers say... */
- espreadregs(sc);
-
-errintr:
- sc->sc_intrcnt.ev_count++;
-
- /*
- * At the moment, only a SCSI Bus Reset or Illegal
- * Command are classed as errors. A disconnect is a
- * valid condition, and we let the code check is the
- * "ESP_BUSFREE_OK" flag was set before declaring it
- * and error.
- *
- * Also, the status register tells us about "Gross
- * Errors" and "Parity errors". Only the Gross Error
- * is really bad, and the parity errors are dealt
- * with later
- *
- * TODO
- * If there are too many parity error, go to slow
- * cable mode ?
- */
-
- /* SCSI Reset */
- if (sc->sc_espintr & ESPINTR_SBR) {
- if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) {
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- }
- if (sc->sc_state != ESP_SBR) {
- printf("%s: SCSI bus reset\n",
- sc->sc_dev.dv_xname);
- esp_init(sc, 0); /* Restart everything */
- return 1;
- }
-#if 0
- /*XXX*/ printf("<expected bus reset: "
- "[intr %x, stat %x, step %d]>\n",
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
-#endif
- if (sc->sc_nexus)
- panic("%s: nexus in reset state",
- sc->sc_dev.dv_xname);
- goto sched;
- }
-
- ecb = sc->sc_nexus;
-
-#define ESPINTR_ERR (ESPINTR_SBR|ESPINTR_ILL)
- if (sc->sc_espintr & ESPINTR_ERR ||
- sc->sc_espstat & ESPSTAT_GE) {
-
- if (sc->sc_espstat & ESPSTAT_GE) {
- /* no target ? */
- if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) {
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- }
- if (sc->sc_state == ESP_CONNECTED ||
- sc->sc_state == ESP_SELECTING) {
- ecb->xs->error = XS_DRIVER_STUFFUP;
- esp_done(sc, ecb);
- }
- return 1;
- }
-
- if (sc->sc_espintr & ESPINTR_ILL) {
- /* illegal command, out of sync ? */
- printf("%s: illegal command: 0x%x (state %d, phase %x, prevphase %x)\n",
- sc->sc_dev.dv_xname, sc->sc_lastcmd,
- sc->sc_state, sc->sc_phase,
- sc->sc_prevphase);
- if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) {
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- }
- esp_init(sc, 0); /* Restart everything */
- return 1;
- }
- }
-
- /*
- * Call if DMA is active.
- *
- * If DMA_INTR returns true, then maybe go 'round the loop
- * again in case there is no more DMA queued, but a phase
- * change is expected.
- */
- if (DMA_ISACTIVE(sc->sc_dma)) {
- DMA_INTR(sc->sc_dma);
- /* If DMA active here, then go back to work... */
- if ( (sc->sc_espstat & ESPSTAT_GE)
- || (sc->sc_espintr & ESPINTR_ERR))
- goto errintr;
- if (DMA_ISACTIVE(sc->sc_dma))
- return 1;
-
- if (sc->sc_dleft == 0 &&
- (sc->sc_espstat & ESPSTAT_TC) == 0)
- printf("%s: !TC [intr %x, stat %x, step %d]"
- " prevphase %x, resid %x\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr,
- sc->sc_espstat,
- sc->sc_espstep,
- sc->sc_prevphase,
- ecb?ecb->dleft:-1);
- }
-
-#if 0 /* Unreliable on some ESP revisions? */
- if ((sc->sc_espstat & ESPSTAT_INT) == 0) {
- printf("%s: spurious interrupt\n", sc->sc_dev.dv_xname);
- return 1;
- }
-#endif
-
- /*
- * check for less serious errors
- */
- if (sc->sc_espstat & ESPSTAT_PE) {
- printf("%s: SCSI bus parity error\n",
- sc->sc_dev.dv_xname);
- if (sc->sc_prevphase == MESSAGE_IN_PHASE)
- esp_sched_msgout(SEND_PARITY_ERROR);
- else
- esp_sched_msgout(SEND_INIT_DET_ERR);
- }
-
- if (sc->sc_espintr & ESPINTR_DIS) {
- ESP_MISC(("<DISC [intr %x, stat %x, step %d]>",
- sc->sc_espintr,sc->sc_espstat,sc->sc_espstep));
- if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) {
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- }
- /*
- * This command must (apparently) be issued within
- * 250mS of a disconnect. So here you are...
- */
- ESPCMD(sc, ESPCMD_ENSEL);
- switch (sc->sc_state) {
- case ESP_RESELECTED:
- goto sched;
-
- case ESP_SELECTING:
- ecb->xs->error = XS_SELTIMEOUT;
- goto finish;
+ struct esp_softc *esc = (struct esp_softc *)sc;
- case ESP_CONNECTED:
- if ((sc->sc_flags & ESP_SYNCHNEGO)) {
-#ifdef ESP_DEBUG
- if (ecb)
- sc_print_addr(ecb->xs->sc_link);
- printf("sync nego not completed!\n");
-#endif
- ti = &sc->sc_tinfo[ecb->xs->sc_link->target];
- sc->sc_flags &= ~ESP_SYNCHNEGO;
- ti->flags &= ~(T_NEGOTIATE | T_SYNCMODE);
- }
+ esc->sc_dmaaddr = addr;
+ esc->sc_pdmalen = len;
+ esc->sc_datain = datain;
+ esc->sc_dmasize = *dmasize;
+ esc->sc_tc = 0;
- /* it may be OK to disconnect */
- if ((sc->sc_flags & ESP_ABORTING) == 0) {
- /*
- * Section 5.1.1 of the SCSI 2 spec
- * suggests issuing a REQUEST SENSE
- * following an unexpected disconnect.
- * Some devices go into a contingent
- * allegiance condition when
- * disconnecting, and this is necessary
- * to clean up their state.
- */
- printf("%s: unexpected disconnect; ",
- sc->sc_dev.dv_xname);
- if (ecb->flags & ECB_SENSE) {
- printf("resetting\n");
- goto reset;
- }
- printf("sending REQUEST SENSE\n");
- esp_sense(sc, ecb);
- goto out;
- }
-
- ecb->xs->error = XS_DRIVER_STUFFUP;
- goto finish;
-
- case ESP_DISCONNECT:
- TAILQ_INSERT_HEAD(&sc->nexus_list, ecb, chain);
- sc->sc_nexus = NULL;
- goto sched;
-
- case ESP_CMDCOMPLETE:
- goto finish;
- }
- }
-
- switch (sc->sc_state) {
-
- case ESP_SBR:
- printf("%s: waiting for SCSI Bus Reset to happen\n",
- sc->sc_dev.dv_xname);
- return 1;
-
- case ESP_RESELECTED:
- /*
- * we must be continuing a message ?
- */
- if (sc->sc_phase != MESSAGE_IN_PHASE) {
- printf("%s: target didn't identify\n",
- sc->sc_dev.dv_xname);
- esp_init(sc, 1);
- return 1;
- }
-printf("<<RESELECT CONT'd>>");
-#if XXXX
- esp_msgin(sc);
- if (sc->sc_state != ESP_CONNECTED) {
- /* IDENTIFY fail?! */
- printf("%s: identify failed\n",
- sc->sc_dev.dv_xname);
- esp_init(sc, 1);
- return 1;
- }
-#endif
- break;
-
- case ESP_IDLE:
-if (sc->sc_flags & ESP_ICCS) printf("[[esp: BUMMER]]");
- case ESP_SELECTING:
- sc->sc_msgpriq = sc->sc_msgout = sc->sc_msgoutq = 0;
- sc->sc_flags = 0;
-
- if (sc->sc_espintr & ESPINTR_RESEL) {
- /*
- * If we're trying to select a
- * target ourselves, push our command
- * back into the ready list.
- */
- if (sc->sc_state == ESP_SELECTING) {
- ESP_MISC(("backoff selector "));
- sc_link = sc->sc_nexus->xs->sc_link;
- ti = &sc->sc_tinfo[sc_link->target];
- TAILQ_INSERT_HEAD(&sc->ready_list,
- sc->sc_nexus, chain);
- ecb = sc->sc_nexus = NULL;
- }
- sc->sc_state = ESP_RESELECTED;
- if (sc->sc_phase != MESSAGE_IN_PHASE) {
- /*
- * Things are seriously fucked up.
- * Pull the brakes, i.e. reset
- */
- printf("%s: target didn't identify\n",
- sc->sc_dev.dv_xname);
- esp_init(sc, 1);
- return 1;
- }
- if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) != 2) {
- printf("%s: RESELECT: %d bytes in FIFO!\n",
- sc->sc_dev.dv_xname,
- ESP_READ_REG(sc, ESP_FFLAG) &
- ESPFIFO_FF);
- esp_init(sc, 1);
- return 1;
- }
- sc->sc_selid = ESP_READ_REG(sc, ESP_FIFO);
- ESP_MISC(("selid=0x%2x ", sc->sc_selid));
- esp_msgin(sc); /* Handle identify message */
- if (sc->sc_state != ESP_CONNECTED) {
- /* IDENTIFY fail?! */
- printf("%s: identify failed\n",
- sc->sc_dev.dv_xname);
- esp_init(sc, 1);
- return 1;
- }
- continue; /* ie. next phase expected soon */
- }
-
-#define ESPINTR_DONE (ESPINTR_FC|ESPINTR_BS)
- if ((sc->sc_espintr & ESPINTR_DONE) == ESPINTR_DONE) {
- ecb = sc->sc_nexus;
- if (!ecb)
- panic("esp: not nexus at sc->sc_nexus");
-
- sc_link = ecb->xs->sc_link;
- ti = &sc->sc_tinfo[sc_link->target];
-
- switch (sc->sc_espstep) {
- case 0:
- printf("%s: select timeout/no disconnect\n",
- sc->sc_dev.dv_xname);
- ecb->xs->error = XS_SELTIMEOUT;
- goto finish;
- case 1:
- if ((ti->flags & T_NEGOTIATE) == 0) {
- printf("%s: step 1 & !NEG\n",
- sc->sc_dev.dv_xname);
- goto reset;
- }
- if (sc->sc_phase != MESSAGE_OUT_PHASE) {
- printf("%s: !MSGOUT\n",
- sc->sc_dev.dv_xname);
- goto reset;
- }
- /* Start negotiating */
- ti->period = sc->sc_minsync;
- ti->offset = 15;
- sc->sc_flags |= ESP_SYNCHNEGO;
- esp_sched_msgout(SEND_SDTR);
- break;
- case 3:
- /*
- * Grr, this is supposed to mean
- * "target left command phase
- * prematurely". It seems to happen
- * regularly when sync mode is on.
- * Look at FIFO to see if command
- * went out.
- * (Timing problems?)
- */
- if ((ESP_READ_REG(sc, ESP_FFLAG)&ESPFIFO_FF) == 0) {
- /* Hope for the best.. */
- break;
- }
- printf("(%s:%d:%d): selection failed;"
- " %d left in FIFO "
- "[intr %x, stat %x, step %d]\n",
- sc->sc_dev.dv_xname,
- sc_link->target,
- sc_link->lun,
- ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF,
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
- ESPCMD(sc, ESPCMD_FLUSH);
- esp_sched_msgout(SEND_ABORT);
- return 1;
- case 2:
- /* Select stuck at Command Phase */
- ESPCMD(sc, ESPCMD_FLUSH);
- case 4:
- /* So far, everything went fine */
- break;
- }
-#if 0
- if (ecb->xs->flags & SCSI_RESET)
- esp_sched_msgout(SEND_DEV_RESET);
- else if (ti->flags & T_NEGOTIATE)
- esp_sched_msgout(
- SEND_IDENTIFY | SEND_SDTR);
- else
- esp_sched_msgout(SEND_IDENTIFY);
-#endif
-
- ecb->flags |= ECB_NEXUS;
- ti->lubusy |= (1 << sc_link->lun);
-
- sc->sc_prevphase = INVALID_PHASE; /* ?? */
- /* Do an implicit RESTORE POINTERS. */
- sc->sc_dp = ecb->daddr;
- sc->sc_dleft = ecb->dleft;
-
- /* On our first connection, schedule a timeout. */
- if ((ecb->xs->flags & SCSI_POLL) == 0)
- timeout(esp_timeout, ecb, (ecb->timeout * hz) / 1000);
-
- sc->sc_state = ESP_CONNECTED;
- break;
- } else {
- printf("%s: unexpected status after select"
- ": [intr %x, stat %x, step %x]\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- goto reset;
- }
- if (sc->sc_state == ESP_IDLE) {
- printf("%s: stray interrupt\n", sc->sc_dev.dv_xname);
- return 0;
- }
- break;
-
- case ESP_CONNECTED:
- if (sc->sc_flags & ESP_ICCS) {
- u_char msg;
-
- sc->sc_flags &= ~ESP_ICCS;
-
- if (!(sc->sc_espintr & ESPINTR_DONE)) {
- printf("%s: ICCS: "
- ": [intr %x, stat %x, step %x]\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
- }
- if ((ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) != 2) {
- int i = (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) - 2;
- while (i--)
- (void) ESP_READ_REG(sc, ESP_FIFO);
- }
- ecb->stat = ESP_READ_REG(sc, ESP_FIFO);
- msg = ESP_READ_REG(sc, ESP_FIFO);
- ESP_PHASE(("<stat:(%x,%x)>", ecb->stat, msg));
- if (msg == MSG_CMDCOMPLETE) {
- ecb->xs->resid = ecb->dleft = sc->sc_dleft;
- sc->sc_state = ESP_CMDCOMPLETE;
- } else
- printf("%s: STATUS_PHASE: msg %d\n",
- sc->sc_dev.dv_xname, msg);
- ESPCMD(sc, ESPCMD_MSGOK);
- continue; /* ie. wait for disconnect */
- }
- break;
- default:
- panic("%s: invalid state: %d",
- sc->sc_dev.dv_xname,
- sc->sc_state);
- }
-
- /*
- * Driver is now in state ESP_CONNECTED, i.e. we
- * have a current command working the SCSI bus.
- */
- if (sc->sc_state != ESP_CONNECTED || ecb == NULL) {
- panic("esp no nexus");
- }
-
- switch (sc->sc_phase) {
- case MESSAGE_OUT_PHASE:
- ESP_PHASE(("MESSAGE_OUT_PHASE "));
- esp_msgout(sc);
- sc->sc_prevphase = MESSAGE_OUT_PHASE;
- break;
- case MESSAGE_IN_PHASE:
- ESP_PHASE(("MESSAGE_IN_PHASE "));
- if (sc->sc_espintr & ESPINTR_BS) {
- ESPCMD(sc, ESPCMD_FLUSH);
- sc->sc_flags |= ESP_WAITI;
- ESPCMD(sc, ESPCMD_TRANS);
- } else if (sc->sc_espintr & ESPINTR_FC) {
- if ((sc->sc_flags & ESP_WAITI) == 0) {
- printf("%s: MSGIN: unexpected FC bit: "
- "[intr %x, stat %x, step %x]\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
- }
- sc->sc_flags &= ~ESP_WAITI;
- esp_msgin(sc);
- } else {
- printf("%s: MSGIN: weird bits: "
- "[intr %x, stat %x, step %x]\n",
- sc->sc_dev.dv_xname,
- sc->sc_espintr, sc->sc_espstat,
- sc->sc_espstep);
- }
- sc->sc_prevphase = MESSAGE_IN_PHASE;
- break;
- case COMMAND_PHASE: {
- /* well, this means send the command again */
- u_char *cmd = (u_char *)&ecb->cmd;
- int i;
-
- ESP_PHASE(("COMMAND_PHASE 0x%02x (%d) ",
- ecb->cmd.opcode, ecb->clen));
- if (ESP_READ_REG(sc, ESP_FFLAG) & ESPFIFO_FF) {
- ESPCMD(sc, ESPCMD_FLUSH);
- DELAY(1);
- }
- /* Now the command into the FIFO */
- for (i = 0; i < ecb->clen; i++)
- ESP_WRITE_REG(sc, ESP_FIFO, *cmd++);
- ESPCMD(sc, ESPCMD_TRANS);
- sc->sc_prevphase = COMMAND_PHASE;
- }
- break;
- case DATA_OUT_PHASE:
- ESP_PHASE(("DATA_OUT_PHASE [%d] ", sc->sc_dleft));
- ESPCMD(sc, ESPCMD_FLUSH);
- size = min(sc->sc_dleft, sc->sc_maxxfer);
- DMA_SETUP(sc->sc_dma, &sc->sc_dp, &sc->sc_dleft,
- 0, &size);
- sc->sc_prevphase = DATA_OUT_PHASE;
- goto setup_xfer;
- case DATA_IN_PHASE:
- ESP_PHASE(("DATA_IN_PHASE "));
- if (sc->sc_rev == ESP100)
- ESPCMD(sc, ESPCMD_FLUSH);
- size = min(sc->sc_dleft, sc->sc_maxxfer);
- DMA_SETUP(sc->sc_dma, &sc->sc_dp, &sc->sc_dleft,
- 1, &size);
- sc->sc_prevphase = DATA_IN_PHASE;
- setup_xfer:
-#ifdef MAC68K_DRIVER
- if (!size) {
-#endif
- /* Program the SCSI counter */
- ESP_WRITE_REG(sc, ESP_TCL, size);
- ESP_WRITE_REG(sc, ESP_TCM, size >> 8);
- if (sc->sc_cfg2 & ESPCFG2_FE) {
- ESP_WRITE_REG(sc, ESP_TCH, size >> 16);
- }
- /* load the count in */
- ESPCMD(sc, ESPCMD_NOP|ESPCMD_DMA);
-#ifdef MAC68K_DRIVER
- }
-#endif
-
- /*
- * Note that if `size' is 0, we've already transceived
- * all the bytes we want but we're still in DATA PHASE.
- * Apparently, the device needs padding. Also, a
- * transfer size of 0 means "maximum" to the chip
- * DMA logic.
- */
- ESPCMD(sc,
- (size==0?ESPCMD_TRPAD:ESPCMD_TRANS)|ESPCMD_DMA);
- DMA_GO(sc->sc_dma);
- return 1;
- case STATUS_PHASE:
- ESP_PHASE(("STATUS_PHASE "));
- sc->sc_flags |= ESP_ICCS;
- ESPCMD(sc, ESPCMD_ICCS);
- sc->sc_prevphase = STATUS_PHASE;
- break;
- case INVALID_PHASE:
- break;
- default:
- printf("%s: unexpected bus phase; resetting\n",
- sc->sc_dev.dv_xname);
- goto reset;
- }
- }
- panic("esp: should not get here..");
-
-reset:
- esp_init(sc, 1);
- return 1;
-
-finish:
- untimeout(esp_timeout, ecb);
- esp_done(sc, ecb);
- goto out;
-
-sched:
- sc->sc_state = ESP_IDLE;
- esp_sched(sc);
- goto out;
-
-out:
- return 1;
+ return 0;
}
void
-esp_abort(sc, ecb)
- struct esp_softc *sc;
- struct esp_ecb *ecb;
+esp_dma_go(sc)
+ struct ncr53c9x_softc *sc;
{
+ struct esp_softc *esc = (struct esp_softc *)sc;
- /* 2 secs for the abort */
- ecb->timeout = ESP_ABORT_TIMEOUT;
- ecb->flags |= ECB_ABORT;
-
- if (ecb == sc->sc_nexus) {
- /*
- * If we're still selecting, the message will be scheduled
- * after selection is complete.
- */
- if (sc->sc_state == ESP_CONNECTED)
- esp_sched_msgout(SEND_ABORT);
- } else {
- esp_dequeue(sc, ecb);
- TAILQ_INSERT_HEAD(&sc->ready_list, ecb, chain);
- if (sc->sc_state == ESP_IDLE)
- esp_sched(sc);
+ if (esc->sc_datain == 0) {
+ esc->sc_reg[NCR_FIFO * 16] = **esc->sc_dmaaddr;
+ (*esc->sc_pdmalen)--;
+ (*esc->sc_dmaaddr)++;
}
+ esc->sc_active = 1;
}
void
-esp_timeout(arg)
- void *arg;
+esp_dma_stop(sc)
+ struct ncr53c9x_softc *sc;
{
- struct esp_ecb *ecb = arg;
- struct scsi_xfer *xs = ecb->xs;
- struct scsi_link *sc_link = xs->sc_link;
- struct esp_softc *sc = sc_link->adapter_softc;
- int s;
-
- sc_print_addr(sc_link);
- printf("%s: timed out [ecb %p (flags 0x%x, dleft %x, stat %x)], "
- "<state %d, nexus %p, phase(c %x, p %x), resid %x, msg(q %x,o %x) %s>",
- sc->sc_dev.dv_xname,
- ecb, ecb->flags, ecb->dleft, ecb->stat,
- sc->sc_state, sc->sc_nexus, sc->sc_phase, sc->sc_prevphase,
- sc->sc_dleft, sc->sc_msgpriq, sc->sc_msgout,
- DMA_ISACTIVE(sc->sc_dma) ? "DMA active" : "");
-#if ESP_DEBUG > 0
- printf("TRACE: %s.", ecb->trace);
-#endif
-
- s = splbio();
+}
- if (ecb->flags & ECB_ABORT) {
- /* abort timed out */
- printf(" AGAIN\n");
- esp_init(sc, 1);
- } else {
- /* abort the operation that has timed out */
- printf("\n");
- xs->error = XS_TIMEOUT;
- esp_abort(sc, ecb);
- }
+int
+esp_dma_isactive(sc)
+ struct ncr53c9x_softc *sc;
+{
+ struct esp_softc *esc = (struct esp_softc *)sc;
- splx(s);
+ return esc->sc_active;
}
projects / openbsd / commitdiff