diff options
| author | jonathan <jonathan@NetBSD.org> | 1996-09-25 21:07:46 +0000 |
|---|---|---|
| committer | jonathan <jonathan@NetBSD.org> | 1996-09-25 21:07:46 +0000 |
| commit | 8eca2b2bb40c156799ecaea6fc5d28d60c1b2737 (patch) | |
| tree | fb36e63a0698b9ec3e9b3f12e1438d7a261ccf37 /sys/dev | |
| parent | 3f15a064978c7883cfa0992f219e735520a1621f (diff) | |
* Rewrite asc driver with ``mi'' backend and parent-specific front-end
cfattach code for TC SCSI option cards and ioasic 53c94 baseboard SCSI.
ascvar.h: shared softc declarations
asc_ioasic.c: ioasic front-end code.
asc_tc.c: Turbochannel option (and 5000/200 basebard) front-end code.
* ioasic_attach meeds more work to eliminate pmax_type dependency
and to verify the clocks speed passed to 53c94.
* Add prototypes for asc script entry points; should compile with
-Wstrict-prototypes -Wmissing-prototypes.
* Use tcvar.h interface. The usage of tc_syncbus() and tc_mb() may
not be quite stylistically on an Alhpa, but it apparently makes no
difference on the eerly-generation Alpha CPUs in TC Alphas.
Diffstat (limited to 'sys/dev')
| -rw-r--r-- | sys/dev/tc/asc.c | 407 | ||||
| -rw-r--r-- | sys/dev/tc/asc_ioasic.c | 244 | ||||
| -rw-r--r-- | sys/dev/tc/asc_tc.c | 169 | ||||
| -rw-r--r-- | sys/dev/tc/ascvar.h | 92 |
4 files changed, 583 insertions, 329 deletions
diff --git a/sys/dev/tc/asc.c b/sys/dev/tc/asc.c index b70cd48481c..b6d0de3642e 100644 --- a/sys/dev/tc/asc.c +++ b/sys/dev/tc/asc.c @@ -1,4 +1,4 @@ -/* $NetBSD: asc.c,v 1.27 1996/08/28 19:01:36 cgd Exp $ */ +/* $NetBSD: asc.c,v 1.28 1996/09/25 21:07:46 jonathan Exp $ */ /*- * Copyright (c) 1992, 1993 @@ -148,12 +148,10 @@ #include <pmax/pmax/asic.h> #include <pmax/pmax/kmin.h> -#include <pmax/pmax/pmaxtype.h> /*#define readback(a) { register int foo; wbflush(); foo = (a); }*/ #define readback(a) { register int foo; foo = (a); } -extern int pmax_boardtype; /* * In 4ns ticks. @@ -194,10 +192,8 @@ int asc_to_scsi_period[] = { }; /* - * Internal forward declarations. + * Debugging log of SCSI operations. */ -static void asc_reset(); -static void asc_startcmd(); #ifdef DEBUG int asc_debug = 1; @@ -217,6 +213,14 @@ struct asc_log { void asc_DumpLog __P((char *str)); #endif + +/* + * Script, scsi state, and device softc structure declarations. + * script pointers occur in both scsi state and the softc, + * so they are defined first. + */ + + /* * Scripts are entries in a state machine table. * A script has four parts: a pre-condition, an action, a command to the chip, @@ -230,32 +234,49 @@ void asc_DumpLog __P((char *str)); * script proceeds if the action routine returns TRUE. * See asc_intr() for how and where this is all done. */ +struct asc_softc; typedef struct script { int condition; /* expected state at interrupt time */ - int (*action)(); /* extra operations */ + + int (*action) /* extra operations */ + __P((register struct asc_softc *asc, register int status, + register int ss, register int ir)); int command; /* command to the chip */ struct script *next; /* index into asc_scripts for next state */ } script_t; + +/* + * script definitions + */ + /* Matching on the condition value */ #define SCRIPT_MATCH(ir, csr) ((ir) | (((csr) & 0x67) << 8)) +/* + * A typedef for a script function, to use in forward declarations. + */ +typedef int +script_fn_t __P((register struct asc_softc *asc, register int status, + register int ss, register int ir)); + + /* forward decls of script actions */ -static int script_nop(); /* when nothing needed */ -static int asc_end(); /* all come to an end */ -static int asc_get_status(); /* get status from target */ -static int asc_dma_in(); /* start reading data from target */ -static int asc_last_dma_in(); /* cleanup after all data is read */ -static int asc_resume_in(); /* resume data in after a message */ -static int asc_resume_dma_in(); /* resume DMA after a disconnect */ -static int asc_dma_out(); /* send data to target via dma */ -static int asc_last_dma_out(); /* cleanup after all data is written */ -static int asc_resume_out(); /* resume data out after a message */ -static int asc_resume_dma_out(); /* resume DMA after a disconnect */ -static int asc_sendsync(); /* negotiate sync xfer */ -static int asc_replysync(); /* negotiate sync xfer */ -static int asc_msg_in(); /* process a message byte */ -static int asc_disconnect(); /* process an expected disconnect */ +static script_fn_t script_nop; /* when nothing needed */ +static script_fn_t asc_end; /* all come to an end */ +static script_fn_t asc_get_status; /* get status from target */ +static script_fn_t asc_dma_in; /* start reading data from target */ +static script_fn_t asc_last_dma_in; /* cleanup after all data is read */ +static script_fn_t asc_resume_in; /* resume data in after a message */ +static script_fn_t asc_resume_dma_in; /* resume DMA after a disconnect */ +static script_fn_t asc_dma_out; /* send data to target via dma */ +static script_fn_t asc_last_dma_out; /* cleanup after all data is written */ +static script_fn_t asc_resume_out; /* resume data out after a message */ +static script_fn_t asc_resume_dma_out; /* resume DMA after a disconnect */ +static script_fn_t asc_sendsync; /* negotiate sync xfer */ +static script_fn_t asc_replysync; /* negotiate sync xfer */ +static script_fn_t asc_msg_in; /* process a message byte */ +static script_fn_t asc_disconnect; /* process an expected disconnect */ /* Define the index into asc_scripts for various state transitions */ #define SCRIPT_DATA_IN 0 @@ -379,92 +400,14 @@ script_t asc_scripts[] = { &asc_scripts[SCRIPT_GET_STATUS]}, }; -/* - * State kept for each active SCSI device. - */ -typedef struct scsi_state { - script_t *script; /* saved script while processing error */ - int statusByte; /* status byte returned during STATUS_PHASE */ - int error; /* errno to pass back to device driver */ - u_char *dmaBufAddr; /* DMA buffer address */ - u_int dmaBufSize; /* DMA buffer size */ - int dmalen; /* amount to transfer in this chunk */ - int dmaresid; /* amount not transfered if chunk suspended */ - int buflen; /* total remaining amount of data to transfer */ - char *buf; /* current pointer within scsicmd->buf */ - int flags; /* see below */ - int msglen; /* number of message bytes to read */ - int msgcnt; /* number of message bytes received */ - u_char sync_period; /* DMA synchronous period */ - u_char sync_offset; /* DMA synchronous xfer offset or 0 if async */ - u_char msg_out; /* next MSG_OUT byte to send */ - u_char msg_in[16]; /* buffer for multibyte messages */ -} State; - -/* state flags */ -#define DISCONN 0x001 /* true if currently disconnected from bus */ -#define DMA_IN_PROGRESS 0x002 /* true if data DMA started */ -#define DMA_IN 0x004 /* true if reading from SCSI device */ -#define DMA_OUT 0x010 /* true if writing to SCSI device */ -#define DID_SYNC 0x020 /* true if synchronous offset was negotiated */ -#define TRY_SYNC 0x040 /* true if try neg. synchronous offset */ -#define PARITY_ERR 0x080 /* true if parity error seen */ -#define CHECK_SENSE 0x100 /* true if doing sense command */ - -/* - * State kept for each active SCSI host interface (53C94). - */ -struct asc_softc { - struct device sc_dev; /* us as a device */ - asc_regmap_t *regs; /* chip address */ - volatile int *dmar; /* DMA address register address */ - u_char *buff; /* RAM buffer address (uncached) */ - int sc_id; /* SCSI ID of this interface */ - int myidmask; /* ~(1 << myid) */ - int state; /* current SCSI connection state */ - int target; /* target SCSI ID if busy */ - script_t *script; /* next expected interrupt & action */ - ScsiCmd *cmd[ASC_NCMD]; /* active command indexed by SCSI ID */ - State st[ASC_NCMD]; /* state info for each active command */ - void (*dma_start)(); /* Start dma routine */ - void (*dma_end)(); /* End dma routine */ - u_char *dma_next; - int dma_xfer; /* Dma len still to go */ - int min_period; /* Min transfer period clk/byte */ - int max_period; /* Max transfer period clk/byte */ - int ccf; /* CCF, whatever that really is? */ - int timeout_250; /* 250ms timeout */ - int tb_ticks; /* 4ns. ticks/tb channel ticks */ -#ifdef USE_NEW_SCSI - struct scsi_link sc_link; /* scsi link struct */ -#endif -}; - -#define ASC_STATE_IDLE 0 /* idle state */ -#define ASC_STATE_BUSY 1 /* selecting or currently connected */ -#define ASC_STATE_TARGET 2 /* currently selected as target */ -#define ASC_STATE_RESEL 3 /* currently waiting for reselect */ -typedef struct asc_softc *asc_softc_t; +#include <dev/tc/ascvar.h> /* - * Dma operations. - */ -#define ASCDMA_READ 1 -#define ASCDMA_WRITE 2 -static void tb_dma_start(), tb_dma_end(), asic_dma_start(), asic_dma_end(); -extern u_long asc_iomem; - - -/* - * Autoconfiguration data for config. + * Internal forward declarations. */ -int ascmatch __P((struct device * parent, void *cfdata, void *aux)); -void ascattach __P((struct device *parent, struct device *self, void *aux)); - -struct cfattach asc_ca = { - sizeof(struct asc_softc), ascmatch, ascattach -}; +static void asc_reset __P((asc_softc_t asc, asc_regmap_t *regs)); +static void asc_startcmd __P((asc_softc_t asc, int target)); extern struct cfdriver asc_cd; struct cfdriver asc_cd = { @@ -492,112 +435,51 @@ struct scsi_device asc_dev = { /* * Definition of the controller for the old auto-configuration program. */ -void asc_start(); +void asc_start __P((register ScsiCmd *scsicmd)); int asc_intr __P ((void *asc)); struct pmax_driver ascdriver = { "asc", NULL, asc_start, 0, asc_intr, }; +void asc_minphys __P((struct buf *bp)); -extern struct cfdriver ioasic_cd; /* XXX */ /* - * Match driver based on name + * bus-parent shared attach function */ -int -ascmatch(parent, match, aux) - struct device *parent; - void *match; - void *aux; -{ - struct ioasicdev_attach_args *d = aux; - struct tc_attach_args *t = aux; - void *ascaddr; - - /*if (parent->dv_cfdata->cf_driver == &ioasic_cd) */ - if (strncmp(d->iada_modname, "asc", TC_ROM_LLEN) && - strncmp(d->iada_modname, "PMAZ-AA ", TC_ROM_LLEN)) - return (0); - - if (parent->dv_cfdata->cf_driver == &ioasic_cd) - ascaddr = (void*)d->iada_addr; - else - ascaddr = (void*)t->ta_addr; - - if (badaddr(ascaddr + ASC_OFFSET_53C94, 4)) - return (0); - - return (1); -} - void -ascattach(parent, self, aux) - struct device *parent; - struct device *self; - void *aux; +ascattach(asc, dmabufsize, bus_speed) + register asc_softc_t asc; + int dmabufsize; { - register struct ioasicdev_attach_args *d = aux; - register struct tc_attach_args *t = aux; - register asc_softc_t asc = (asc_softc_t) self; register asc_regmap_t *regs; int id, s, i; - int bufsiz; - void *ascaddr; int unit; - if (asc->sc_dev.dv_parent->dv_cfdata->cf_driver == &ioasic_cd) { - ascaddr = (void*)MACH_PHYS_TO_UNCACHED(d->iada_addr); - } else { - ascaddr = (void*)MACH_PHYS_TO_UNCACHED(t->ta_addr); - } unit = asc->sc_dev.dv_unit; /* - * Initialize hw descriptor, cache some pointers - */ - asc->regs = (asc_regmap_t *)(ascaddr + ASC_OFFSET_53C94); - - /* * Set up machine dependencies. - * (1) how to do dma - * (2) timing based on turbochannel frequency + * (1) timing based on turbochannel frequency */ - if (asc->sc_dev.dv_parent->dv_cfdata->cf_driver == &ioasic_cd) { - asc->buff = (u_char *)MACH_PHYS_TO_UNCACHED(asc_iomem); - bufsiz = 8192; - *((volatile int *)IOASIC_REG_SCSI_DMAPTR(ioasic_base)) = -1; - *((volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base)) = -1; - *((volatile int *)IOASIC_REG_SCSI_SCR(ioasic_base)) = 0; - asc->dma_start = asic_dma_start; - asc->dma_end = asic_dma_end; - } else - { - /* - * Fall through for turbochannel option. - */ - asc->dmar = (volatile int *)(ascaddr + ASC_OFFSET_DMAR); - asc->buff = (u_char *)(ascaddr + ASC_OFFSET_RAM); - bufsiz = PER_TGT_DMA_SIZE; - asc->dma_start = tb_dma_start; - asc->dma_end = tb_dma_end; - }; + /* dma setup done in parent-specific attach code */ + /* * Now for timing. The 3max has a 25Mhz tb whereas the 3min and * maxine are 12.5Mhz. */ - switch (pmax_boardtype) { - case DS_3MAX: - case DS_3MAXPLUS: + switch (bus_speed) { + case ASC_SPEED_25_MHZ: asc->min_period = ASC_MIN_PERIOD25; asc->max_period = ASC_MAX_PERIOD25; asc->ccf = ASC_CCF(25); asc->timeout_250 = ASC_TIMEOUT_250(25, asc->ccf); asc->tb_ticks = 10; break; - case DS_3MIN: - case DS_MAXINE: + + case ASC_SPEED_12_5_MHZ: default: asc->min_period = ASC_MIN_PERIOD12; asc->max_period = ASC_MAX_PERIOD12; @@ -649,21 +531,13 @@ ascattach(parent, self, aux) * We may want to try ping ponging buffers later. */ for (i = 0; i < ASC_NCMD; i++) { - asc->st[i].dmaBufAddr = asc->buff + bufsiz * i; - asc->st[i].dmaBufSize = bufsiz; + asc->st[i].dmaBufAddr = asc->buff + dmabufsize * i; + asc->st[i].dmaBufSize = dmabufsize; } /* Hack for old-sytle SCSI-device probe */ (void) pmax_add_scsi(&ascdriver, unit); - /* tie pseudo-slot to device */ - if (asc->sc_dev.dv_parent->dv_cfdata->cf_driver == &ioasic_cd) - ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_BIO, - asc_intr, asc); - else - tc_intr_establish(parent, t->ta_cookie, TC_IPL_BIO, - asc_intr, asc); - printf(": target %d\n", id); @@ -765,17 +639,17 @@ asc_reset(asc, regs) * Reset chip and wait till done */ regs->asc_cmd = ASC_CMD_RESET; - wbflush(); DELAY(25); + tc_syncbus(); DELAY(25); /* spec says this is needed after reset */ regs->asc_cmd = ASC_CMD_NOP; - wbflush(); DELAY(25); + tc_syncbus(); DELAY(25); /* * Set up various chip parameters */ regs->asc_ccf = asc->ccf; - wbflush(); DELAY(25); + tc_syncbus(); DELAY(25); regs->asc_sel_timo = asc->timeout_250; /* restore our ID */ regs->asc_cnfg1 = asc->sc_id | ASC_CNFG1_P_CHECK; @@ -786,7 +660,7 @@ asc_reset(asc, regs) ASC_TC_PUT(regs, 0); regs->asc_syn_p = asc->min_period; regs->asc_syn_o = 0; /* async for now */ - wbflush(); + tc_mb(); } /* @@ -895,7 +769,7 @@ asc_startcmd(asc, target) /* preload the FIFO with the message to be sent */ regs->asc_fifo = SCSI_DIS_REC_IDENTIFY; - wbflush(); + tc_mb(); /* initialize the DMA */ (*asc->dma_start)(asc, state, state->dmaBufAddr, ASCDMA_WRITE); @@ -1051,7 +925,7 @@ again: ASC_TC_GET(regs, len); fifo = regs->asc_flags & ASC_FLAGS_FIFO_CNT; printf("asc_intr: ignoring strange interrupt"); - printf(" tc %d fifo residue\n", len, fifo); + printf(" tc %d fifo residue %d\n", len, fifo); goto done; } /* FALLTHROUGH */ @@ -1113,7 +987,7 @@ again: printf("asc_intr: dmalen %d len %d fifo %d\n", state->dmalen, len, fifo); /* XXX */ regs->asc_cmd = ASC_CMD_FLUSH; - wbflush(); + tc_mb(); readback(regs->asc_cmd); DELAY(2); } @@ -1342,7 +1216,7 @@ again: */ done: - wbflush(); + tc_mb(); /* watch out for HW race conditions and setup & hold time violations */ ir = regs->asc_status; while (ir != (status = regs->asc_status)) @@ -1874,13 +1748,13 @@ asc_sendsync(asc, status, ss, ir) /* send the extended synchronous negotiation message */ regs->asc_fifo = SCSI_EXTENDED_MSG; - wbflush(); + tc_mb(); regs->asc_fifo = 3; - wbflush(); + tc_mb(); regs->asc_fifo = SCSI_SYNCHRONOUS_XFER; - wbflush(); + tc_mb(); regs->asc_fifo = SCSI_MIN_PERIOD; - wbflush(); + tc_mb(); regs->asc_fifo = ASC_MAX_OFFSET; /* state to resume after we see the sync reply message */ state->script = asc->script + 2; @@ -1905,13 +1779,13 @@ asc_replysync(asc, status, ss, ir) #endif /* send synchronous transfer in response to a request */ regs->asc_fifo = SCSI_EXTENDED_MSG; - wbflush(); + tc_mb(); regs->asc_fifo = 3; - wbflush(); + tc_mb(); regs->asc_fifo = SCSI_SYNCHRONOUS_XFER; - wbflush(); + tc_mb(); regs->asc_fifo = asc_to_scsi_period[state->sync_period] * asc->tb_ticks; - wbflush(); + tc_mb(); regs->asc_fifo = state->sync_offset; regs->asc_cmd = ASC_CMD_XFER_INFO; readback(regs->asc_cmd); @@ -2136,131 +2010,6 @@ asc_disconnect(asc, status, ss, ir) return (1); } -/* - * DMA handling routines. For a turbochannel device, just set the dmar. - * For the I/O ASIC, handle the actual DMA interface. - */ -static void -tb_dma_start(asc, state, cp, flag) - asc_softc_t asc; - State *state; - caddr_t cp; - int flag; -{ - - if (flag == ASCDMA_WRITE) - *asc->dmar = ASC_DMAR_WRITE | ASC_DMA_ADDR(cp); - else - *asc->dmar = ASC_DMA_ADDR(cp); -} - -static void -tb_dma_end(asc, state, flag) - asc_softc_t asc; - State *state; - int flag; -{ - -} - -static void -asic_dma_start(asc, state, cp, flag) - asc_softc_t asc; - State *state; - caddr_t cp; - int flag; -{ - register volatile u_int *ssr = (volatile u_int *) - IOASIC_REG_CSR(ioasic_base); - u_int phys, nphys; - - /* stop DMA engine first */ - *ssr &= ~IOASIC_CSR_DMAEN_SCSI; - *((volatile int *)IOASIC_REG_SCSI_SCR(ioasic_base)) = 0; - - phys = MACH_CACHED_TO_PHYS(cp); - cp = (caddr_t)mips_trunc_page(cp + NBPG); - nphys = MACH_CACHED_TO_PHYS(cp); - - asc->dma_next = cp; - asc->dma_xfer = state->dmalen - (nphys - phys); - - *(volatile int *)IOASIC_REG_SCSI_DMAPTR(ioasic_base) = - IOASIC_DMA_ADDR(phys); - *(volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base) = - IOASIC_DMA_ADDR(nphys); - if (flag == ASCDMA_READ) - *ssr |= IOASIC_CSR_SCSI_DIR | IOASIC_CSR_DMAEN_SCSI; - else - *ssr = (*ssr & ~IOASIC_CSR_SCSI_DIR) | IOASIC_CSR_DMAEN_SCSI; - wbflush(); -} - -static void -asic_dma_end(asc, state, flag) - asc_softc_t asc; - State *state; - int flag; -{ - register volatile u_int *ssr = (volatile u_int *) - IOASIC_REG_CSR(ioasic_base); - register volatile u_int *dmap = (volatile u_int *) - IOASIC_REG_SCSI_DMAPTR(ioasic_base); - register u_short *to; - register int w; - int nb; - - *ssr &= ~IOASIC_CSR_DMAEN_SCSI; - to = (u_short *)MACH_PHYS_TO_CACHED(*dmap >> 3); - *dmap = -1; - *((volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base)) = -1; - wbflush(); - - if (flag == ASCDMA_READ) { - MachFlushDCache(MACH_PHYS_TO_CACHED( - MACH_UNCACHED_TO_PHYS(state->dmaBufAddr)), state->dmalen); - if ( (nb = *((int *)IOASIC_REG_SCSI_SCR(ioasic_base))) != 0) { - /* pick up last upto6 bytes, sigh. */ - - /* Last byte really xferred is.. */ - w = *(int *)IOASIC_REG_SCSI_SDR0(ioasic_base); - *to++ = w; - if (--nb > 0) { - w >>= 16; - *to++ = w; - } - if (--nb > 0) { - w = *(int *)IOASIC_REG_SCSI_SDR1(ioasic_base); - *to++ = w; - } - } - } -} - -#ifdef notdef -/* - * Called by asic_intr() for scsi dma pointer update interrupts. - */ -void -asc_dma_intr() -{ - asc_softc_t asc = &asc_cd.cd_devs[0]; /*XXX*/ - u_int next_phys; - - asc->dma_xfer -= NBPG; - if (asc->dma_xfer <= -NBPG) { - volatile u_int *ssr = (volatile u_int *) - IOASIC_REG_CSR(ioasic_base); - *ssr &= ~IOASIC_CSR_DMAEN_SCSI; - } else { - asc->dma_next += NBPG; - next_phys = MACH_CACHED_TO_PHYS(asc->dma_next); - } - *(volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base) = - IOASIC_DMA_ADDR(next_phys); - wbflush(); -} -#endif /*notdef*/ #ifdef DEBUG void diff --git a/sys/dev/tc/asc_ioasic.c b/sys/dev/tc/asc_ioasic.c new file mode 100644 index 00000000000..8e77027e7be --- /dev/null +++ b/sys/dev/tc/asc_ioasic.c @@ -0,0 +1,244 @@ +/* $NetBSD: asc_ioasic.c,v 1.1 1996/09/25 21:07:54 jonathan Exp $ */ + +/* + * Copyright 1996 The Board of Trustees of The Leland Stanford + * Junior University. All Rights Reserved. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies. Stanford University + * makes no representations about the suitability of this + * software for any purpose. It is provided "as is" without + * express or implied warranty. + * + */ +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/device.h> +#include <dev/tc/tcvar.h> +#include <dev/tc/ioasicvar.h> +#include <machine/autoconf.h> + +#include <pmax/dev/device.h> /* XXX */ +#include <pmax/dev/scsi.h> /* XXX */ + +#include <pmax/dev/ascreg.h> /* XXX */ +#include <dev/tc/ascvar.h> + +#include <mips/locore.h> /* XXX XXX bus.h needs cache-consistency*/ + +/*XXX*/ +#include <pmax/pmax/asic.h> /* XXX ioasic register defs? */ +#include <pmax/pmax/kmin.h> /* XXX ioasic register defs? */ +#include <pmax/pmax/pmaxtype.h> +extern int pmax_boardtype; + + +/* + * Autoconfiguration data for config. + */ +int asc_ioasic_match __P((struct device *, void *, void *)); +void asc_ioasic_attach __P((struct device *, struct device *, void *)); + +struct cfattach asc_ioasic_ca = { + sizeof(struct asc_softc), asc_ioasic_match, asc_ioasic_attach +}; + +/* + * DMA callback declarations + */ + +extern u_long asc_iomem; +static void +asic_dma_start __P((asc_softc_t asc, State *state, caddr_t cp, int flag)); + +static void +asic_dma_end __P((asc_softc_t asc, State *state, int flag)); + +int +asc_ioasic_match(parent, match, aux) + struct device *parent; + void *match; + void *aux; +{ + struct ioasicdev_attach_args *d = aux; + void *ascaddr; + + if (strncmp(d->iada_modname, "asc", TC_ROM_LLEN) && + strncmp(d->iada_modname, "PMAZ-AA ", TC_ROM_LLEN)) + return (0); + + /* probe for chip */ + ascaddr = (void*)d->iada_addr; + if (tc_badaddr(ascaddr + ASC_OFFSET_53C94)) + return (0); + + return (1); +} + +void +asc_ioasic_attach(parent, self, aux) + struct device *parent; + struct device *self; + void *aux; +{ + register struct ioasicdev_attach_args *d = aux; + register asc_softc_t asc = (asc_softc_t) self; + int bufsiz, speed; + + void *ascaddr; + int unit; + + ascaddr = (void*)MACH_PHYS_TO_UNCACHED(d->iada_addr); + unit = asc->sc_dev.dv_unit; + + /* + * Initialize hw descriptor, cache some pointers + */ + asc->regs = (asc_regmap_t *)(ascaddr + ASC_OFFSET_53C94); + + /* + * Set up machine dependencies. + * (1) how to do dma + * (2) timing based on turbochannel frequency + */ + + asc->buff = (u_char *)MACH_PHYS_TO_UNCACHED(asc_iomem); + bufsiz = 8192; + *((volatile int *)IOASIC_REG_SCSI_DMAPTR(ioasic_base)) = -1; + *((volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base)) = -1; + *((volatile int *)IOASIC_REG_SCSI_SCR(ioasic_base)) = 0; + asc->dma_start = asic_dma_start; + asc->dma_end = asic_dma_end; + + /* + * Now for timing. The 3max has a 25Mhz tb whereas the 3min and + * maxine are 12.5Mhz. + */ + + /*printf(" (bus speed: %d) ", t->ta_busspeed);*/ + /* XXX don't these run at 25MHz on any ioasic??*/ + switch (pmax_boardtype) { + case DS_3MAX: + case DS_3MAXPLUS: + speed = ASC_SPEED_25_MHZ; + break; + case DS_3MIN: + case DS_MAXINE: + default: + speed = ASC_SPEED_12_5_MHZ; + break; + }; + + ascattach(asc, bufsiz, speed); + + /* tie pseudo-slot to device */ + + ioasic_intr_establish(parent, d->iada_cookie, TC_IPL_BIO, + asc_intr, asc); +} + + +/* + * DMA handling routines. For a turbochannel device, just set the dmar. + * For the I/O ASIC, handle the actual DMA interface. + */ +static void +asic_dma_start(asc, state, cp, flag) + asc_softc_t asc; + State *state; + caddr_t cp; + int flag; +{ + register volatile u_int *ssr = (volatile u_int *) + IOASIC_REG_CSR(ioasic_base); + u_int phys, nphys; + + /* stop DMA engine first */ + *ssr &= ~IOASIC_CSR_DMAEN_SCSI; + *((volatile int *)IOASIC_REG_SCSI_SCR(ioasic_base)) = 0; + + phys = MACH_CACHED_TO_PHYS(cp); + cp = (caddr_t)mips_trunc_page(cp + NBPG); + nphys = MACH_CACHED_TO_PHYS(cp); + + asc->dma_next = cp; + asc->dma_xfer = state->dmalen - (nphys - phys); + + *(volatile int *)IOASIC_REG_SCSI_DMAPTR(ioasic_base) = + IOASIC_DMA_ADDR(phys); + *(volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base) = + IOASIC_DMA_ADDR(nphys); + if (flag == ASCDMA_READ) + *ssr |= IOASIC_CSR_SCSI_DIR | IOASIC_CSR_DMAEN_SCSI; + else + *ssr = (*ssr & ~IOASIC_CSR_SCSI_DIR) | IOASIC_CSR_DMAEN_SCSI; + wbflush(); +} + +static void +asic_dma_end(asc, state, flag) + asc_softc_t asc; + State *state; + int flag; +{ + register volatile u_int *ssr = (volatile u_int *) + IOASIC_REG_CSR(ioasic_base); + register volatile u_int *dmap = (volatile u_int *) + IOASIC_REG_SCSI_DMAPTR(ioasic_base); + register u_short *to; + register int w; + int nb; + + *ssr &= ~IOASIC_CSR_DMAEN_SCSI; + to = (u_short *)MACH_PHYS_TO_CACHED(*dmap >> 3); + *dmap = -1; + *((volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base)) = -1; + wbflush(); + + if (flag == ASCDMA_READ) { + MachFlushDCache(MACH_PHYS_TO_CACHED( + MACH_UNCACHED_TO_PHYS(state->dmaBufAddr)), state->dmalen); + if ( (nb = *((int *)IOASIC_REG_SCSI_SCR(ioasic_base))) != 0) { + /* pick up last upto6 bytes, sigh. */ + + /* Last byte really xferred is.. */ + w = *(int *)IOASIC_REG_SCSI_SDR0(ioasic_base); + *to++ = w; + if (--nb > 0) { + w >>= 16; + *to++ = w; + } + if (--nb > 0) { + w = *(int *)IOASIC_REG_SCSI_SDR1(ioasic_base); + *to++ = w; + } + } + } +} + +#ifdef notdef +/* + * Called by asic_intr() for scsi dma pointer update interrupts. + */ +void +asc_dma_intr() +{ + asc_softc_t asc = &asc_cd.cd_devs[0]; /*XXX*/ + u_int next_phys; + + asc->dma_xfer -= NBPG; + if (asc->dma_xfer <= -NBPG) { + volatile u_int *ssr = (volatile u_int *) + IOASIC_REG_CSR(ioasic_base); + *ssr &= ~IOASIC_CSR_DMAEN_SCSI; + } else { + asc->dma_next += NBPG; + next_phys = MACH_CACHED_TO_PHYS(asc->dma_next); + } + *(volatile int *)IOASIC_REG_SCSI_DMANPTR(ioasic_base) = + IOASIC_DMA_ADDR(next_phys); + wbflush(); +} +#endif /*notdef*/ diff --git a/sys/dev/tc/asc_tc.c b/sys/dev/tc/asc_tc.c new file mode 100644 index 00000000000..9d075db0218 --- /dev/null +++ b/sys/dev/tc/asc_tc.c @@ -0,0 +1,169 @@ +/* $NetBSD: asc_tc.c,v 1.1 1996/09/25 21:07:53 jonathan Exp $ */ + +/* + * Copyright 1996 The Board of Trustees of The Leland Stanford + * Junior University. All Rights Reserved. + * + * Permission to use, copy, modify, and distribute this + * software and its documentation for any purpose and without + * fee is hereby granted, provided that the above copyright + * notice appear in all copies. Stanford University + * makes no representations about the suitability of this + * software for any purpose. It is provided "as is" without + * express or implied warranty. + * + */ + +#include <sys/param.h> +#include <sys/systm.h> +#include <sys/types.h> +#include <sys/device.h> +#include <dev/tc/tcvar.h> +#include <machine/autoconf.h> +#include <dev/tc/ioasicvar.h> + +#include <pmax/dev/device.h> /* XXX */ +#include <pmax/dev/scsi.h> /* XXX */ + +#include <pmax/dev/ascreg.h> /* XXX */ +#include <dev/tc/ascvar.h> + +/*XXX*/ + + +/* + * Autoconfiguration data for config. + */ +int asc_tc_match __P((struct device *, void *, void *)); +void asc_tc_attach __P((struct device *, struct device *, void *)); + +struct cfattach asc_tc_ca = { + sizeof(struct asc_softc), asc_tc_match, asc_tc_attach +}; + +/* + * DMA callbacks + */ + +static void +tc_dma_start __P((struct asc_softc *asc, struct scsi_state *state, + caddr_t cp, int flag)); + +static void +tc_dma_end __P((struct asc_softc *asc, struct scsi_state *state, + int flag)); + + +int +asc_tc_match(parent, match, aux) + struct device *parent; + void *match; + void *aux; +{ + struct tc_attach_args *t = aux; + void *ascaddr; + + if (strncmp(t->ta_modname, "PMAZ-AA ", TC_ROM_LLEN)) + return (0); + + ascaddr = (void*)t->ta_addr; + + if (tc_badaddr(ascaddr + ASC_OFFSET_53C94)) + return (0); + + return (1); +} + + + +void +asc_tc_attach(parent, self, aux) + struct device *parent; + struct device *self; + void *aux; +{ + register struct tc_attach_args *t = aux; + register asc_softc_t asc = (asc_softc_t) self; + int bufsiz, speed; + + void *ascaddr; + int unit; + + ascaddr = (void*)MACH_PHYS_TO_UNCACHED(t->ta_addr); + unit = asc->sc_dev.dv_unit; + + /* + * Initialize hw descriptor, cache some pointers + */ + asc->regs = (asc_regmap_t *)(ascaddr + ASC_OFFSET_53C94); + + /* + * Set up machine dependencies. + * (1) how to do dma + * (2) timing based on turbochannel frequency + */ + + /* + * Fall through for turbochannel option. + */ + asc->dmar = (volatile int *)(ascaddr + ASC_OFFSET_DMAR); + asc->buff = (u_char *)(ascaddr + ASC_OFFSET_RAM); + bufsiz = PER_TGT_DMA_SIZE; + asc->dma_start = tc_dma_start; + asc->dma_end = tc_dma_end; + + /* + * Now for timing. The 3max has a 25Mhz tb whereas the 3min and + * maxine are 12.5Mhz. + */ + printf(" (bus speed: %d) ", t->ta_busspeed); + + switch (t->ta_busspeed) { + case TC_SPEED_25_MHZ: + speed = ASC_SPEED_25_MHZ; + break; + + default: + printf(" (unknown TC speed, assuming 12.5MHz) "); + /* FALLTHROUGH*/ + case TC_SPEED_12_5_MHZ: + speed = ASC_SPEED_12_5_MHZ; + break; + }; + + ascattach(asc, bufsiz, speed); + + /* tie pseudo-slot to device */ + tc_intr_establish(parent, t->ta_cookie, TC_IPL_BIO, + asc_intr, asc); + + printf(": target %d\n", asc->sc_id); +} + + +/* + * DMA handling routines. For a turbochannel device, just set the dmar. + * For the I/O ASIC, handle the actual DMA interface. + */ +static void +tc_dma_start(asc, state, cp, flag) + asc_softc_t asc; + State *state; + caddr_t cp; + int flag; +{ + + if (flag == ASCDMA_WRITE) + *asc->dmar = ASC_DMAR_WRITE | ASC_DMA_ADDR(cp); + else + *asc->dmar = ASC_DMA_ADDR(cp); +} + +static void +tc_dma_end(asc, state, flag) + asc_softc_t asc; + State *state; + int flag; +{ + +} diff --git a/sys/dev/tc/ascvar.h b/sys/dev/tc/ascvar.h new file mode 100644 index 00000000000..966d0480a03 --- /dev/null +++ b/sys/dev/tc/ascvar.h @@ -0,0 +1,92 @@ +/* $NetBSD: ascvar.h,v 1.1 1996/09/25 21:07:56 jonathan Exp $ */ + + +/* + * State kept for each active SCSI device. + */ +struct script; + +typedef struct scsi_state { + struct script *script; /* saved script while processing error */ + int statusByte; /* status byte returned during STATUS_PHASE */ + int error; /* errno to pass back to device driver */ + u_char *dmaBufAddr; /* DMA buffer address */ + u_int dmaBufSize; /* DMA buffer size */ + int dmalen; /* amount to transfer in this chunk */ + int dmaresid; /* amount not transfered if chunk suspended */ + int buflen; /* total remaining amount of data to transfer */ + char *buf; /* current pointer within scsicmd->buf */ + int flags; /* see below */ + int msglen; /* number of message bytes to read */ + int msgcnt; /* number of message bytes received */ + u_char sync_period; /* DMA synchronous period */ + u_char sync_offset; /* DMA synchronous xfer offset or 0 if async */ + u_char msg_out; /* next MSG_OUT byte to send */ + u_char msg_in[16]; /* buffer for multibyte messages */ +} State; + +/* state flags */ +#define DISCONN 0x001 /* true if currently disconnected from bus */ +#define DMA_IN_PROGRESS 0x002 /* true if data DMA started */ +#define DMA_IN 0x004 /* true if reading from SCSI device */ +#define DMA_OUT 0x010 /* true if writing to SCSI device */ +#define DID_SYNC 0x020 /* true if synchronous offset was negotiated */ +#define TRY_SYNC 0x040 /* true if try neg. synchronous offset */ +#define PARITY_ERR 0x080 /* true if parity error seen */ +#define CHECK_SENSE 0x100 /* true if doing sense command */ + + +/* + * State kept for each active SCSI host interface (53C94). + */ + +struct asc_softc { + struct device sc_dev; /* us as a device */ + asc_regmap_t *regs; /* chip address */ + volatile int *dmar; /* DMA address register address */ + u_char *buff; /* RAM buffer address (uncached) */ + int sc_id; /* SCSI ID of this interface */ + int myidmask; /* ~(1 << myid) */ + int state; /* current SCSI connection state */ + int target; /* target SCSI ID if busy */ + struct script *script; /* next expected interrupt & action */ + ScsiCmd *cmd[ASC_NCMD]; /* active command indexed by SCSI ID */ + State st[ASC_NCMD]; /* state info for each active command */ + /* Start dma routine */ + void (*dma_start) __P((struct asc_softc *asc, + struct scsi_state *state, + caddr_t cp, int flag)); + /* End dma routine */ + void (*dma_end) __P((struct asc_softc *asc, + struct scsi_state *state, int flag)); + + u_char *dma_next; + int dma_xfer; /* Dma len still to go */ + int min_period; /* Min transfer period clk/byte */ + int max_period; /* Max transfer period clk/byte */ + int ccf; /* CCF, whatever that really is? */ + int timeout_250; /* 250ms timeout */ + int tb_ticks; /* 4ns. ticks/tb channel ticks */ +#ifdef USE_NEW_SCSI + struct scsi_link sc_link; /* scsi link struct */ +#endif +}; +typedef struct asc_softc *asc_softc_t; + +#define ASC_STATE_IDLE 0 /* idle state */ +#define ASC_STATE_BUSY 1 /* selecting or currently connected */ +#define ASC_STATE_TARGET 2 /* currently selected as target */ +#define ASC_STATE_RESEL 3 /* currently waiting for reselect */ + + +#define ASC_SPEED_25_MHZ 250 +#define ASC_SPEED_12_5_MHZ 125 + +void ascattach __P((struct asc_softc *asc, int dmabufsiz, int bus_speed)); +int asc_intr __P ((void *asc)); + +/* + * Dma operations. + */ +#define ASCDMA_READ 1 +#define ASCDMA_WRITE 2 |
