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Diffstat (limited to 'sys/dev/esp/lsi64854.c')
| -rw-r--r-- | sys/dev/esp/lsi64854.c | 722 |
1 files changed, 0 insertions, 722 deletions
diff --git a/sys/dev/esp/lsi64854.c b/sys/dev/esp/lsi64854.c deleted file mode 100644 index 6216560716e4..000000000000 --- a/sys/dev/esp/lsi64854.c +++ /dev/null @@ -1,722 +0,0 @@ -/*- - * Copyright (c) 2004 Scott Long - * All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -/* $NetBSD: lsi64854.c,v 1.22 2002/10/01 07:07:03 petrov Exp $ */ - -/*- - * Copyright (c) 1998 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Paul Kranenburg. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * 3. All advertising materials mentioning features or use of this software - * must display the following acknowledgement: - * This product includes software developed by the NetBSD - * Foundation, Inc. and its contributors. - * 4. Neither the name of The NetBSD Foundation nor the names of its - * contributors may be used to endorse or promote products derived - * from this software without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED - * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR - * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS - * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR - * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF - * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS - * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN - * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) - * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/systm.h> -#include <sys/bus.h> -#include <sys/kernel.h> -#include <sys/resource.h> -#include <sys/lock.h> -#include <sys/mutex.h> - -#include <machine/bus.h> - -#include <cam/cam.h> -#include <cam/cam_ccb.h> -#include <cam/scsi/scsi_all.h> - -#include <dev/esp/lsi64854reg.h> -#include <dev/esp/lsi64854var.h> - -#include <dev/esp/ncr53c9xreg.h> -#include <dev/esp/ncr53c9xvar.h> - -void lsi64854_reset(struct lsi64854_softc *); -int lsi64854_setup(struct lsi64854_softc *, caddr_t *, size_t *, - int, size_t *); -int lsi64854_setup_pp(struct lsi64854_softc *, caddr_t *, size_t *, - int, size_t *); - -#ifdef DEBUG -#define LDB_SCSI 1 -#define LDB_ENET 2 -#define LDB_PP 4 -#define LDB_ANY 0xff -int lsi64854debug = 0; -#define DPRINTF(a,x) do { if (lsi64854debug & (a)) printf x ; } while (0) -#else -#define DPRINTF(a,x) -#endif - -#define MAX_DMA_SZ (16*1024*1024) - -/* - * Finish attaching this DMA device. - * Front-end must fill in these fields: - * sc_regs - * sc_burst - * sc_channel (one of SCSI, ENET, PP) - * sc_client (one of SCSI, ENET, PP `soft_c' pointers) - */ -void -lsi64854_attach(struct lsi64854_softc *sc) -{ - uint32_t csr; - - sc->dv_name = device_get_nameunit(sc->sc_dev); - - /* Indirect functions */ - switch (sc->sc_channel) { - case L64854_CHANNEL_SCSI: - sc->intr = lsi64854_scsi_intr; - sc->setup = lsi64854_setup; - break; - case L64854_CHANNEL_ENET: - sc->intr = lsi64854_enet_intr; - break; - case L64854_CHANNEL_PP: - sc->setup = lsi64854_setup_pp; - break; - default: - printf("%s: unknown channel\n", sc->dv_name); - } - sc->reset = lsi64854_reset; - - /* Allocate a dmamap */ - if (bus_dma_tag_create(sc->sc_parent_dmat, /* parent */ - 1, 0, /* algnment, boundary */ - BUS_SPACE_MAXADDR, /* lowaddr */ - BUS_SPACE_MAXADDR, /* highaddr */ - NULL, NULL, /* filter, filterarg */ - MAX_DMA_SZ, /* maxsize */ - 1, /* nsegments */ - MAX_DMA_SZ, /* maxsegsize */ - BUS_DMA_ALLOCNOW, /* flags */ - NULL, NULL, /* lockfunc, lockarg */ - &sc->sc_buffer_dmat)) { - printf("%s: can't allocate buffer DMA tag\n", sc->dv_name); - return; - } - - if (bus_dmamap_create(sc->sc_buffer_dmat, 0, &sc->sc_dmamap) != 0) { - printf("%s: DMA map create failed\n", sc->dv_name); - return; - } - - csr = L64854_GCSR(sc); - sc->sc_rev = csr & L64854_DEVID; - if (sc->sc_rev == DMAREV_HME) { - return; - } - printf(": DMA rev "); - switch (sc->sc_rev) { - case DMAREV_0: - printf("0"); - break; - case DMAREV_ESC: - printf("esc"); - break; - case DMAREV_1: - printf("1"); - break; - case DMAREV_PLUS: - printf("1+"); - break; - case DMAREV_2: - printf("2"); - break; - default: - printf("unknown (0x%x)", sc->sc_rev); - } - - DPRINTF(LDB_ANY, (", burst 0x%x, csr 0x%x", sc->sc_burst, csr)); - printf("\n"); -} - -/* - * DMAWAIT waits while condition is true - */ -#define DMAWAIT(SC, COND, MSG, DONTPANIC) do if (COND) { \ - int count = 500000; \ - while ((COND) && --count > 0) DELAY(1); \ - if (count == 0) { \ - printf("%s: line %d: CSR = 0x%lx\n", __FILE__, __LINE__, \ - (u_long)L64854_GCSR(SC)); \ - if (DONTPANIC) \ - printf(MSG); \ - else \ - panic(MSG); \ - } \ -} while (0) - -#define DMA_DRAIN(sc, dontpanic) do { \ - uint32_t csr; \ - /* \ - * DMA rev0 & rev1: we are not allowed to touch the DMA "flush" \ - * and "drain" bits while it is still thinking about a \ - * request. \ - * other revs: D_ESC_R_PEND bit reads as 0 \ - */ \ - DMAWAIT(sc, L64854_GCSR(sc) & D_ESC_R_PEND, "R_PEND", dontpanic);\ - if (sc->sc_rev != DMAREV_HME) { \ - /* \ - * Select drain bit based on revision \ - * also clears errors and D_TC flag \ - */ \ - csr = L64854_GCSR(sc); \ - if (sc->sc_rev == DMAREV_1 || sc->sc_rev == DMAREV_0) \ - csr |= D_ESC_DRAIN; \ - else \ - csr |= L64854_INVALIDATE; \ - \ - L64854_SCSR(sc,csr); \ - } \ - /* \ - * Wait for draining to finish \ - * rev0 & rev1 call this PACKCNT \ - */ \ - DMAWAIT(sc, L64854_GCSR(sc) & L64854_DRAINING, "DRAINING", dontpanic);\ -} while(0) - -#define DMA_FLUSH(sc, dontpanic) do { \ - uint32_t csr; \ - /* \ - * DMA rev0 & rev1: we are not allowed to touch the DMA "flush" \ - * and "drain" bits while it is still thinking about a \ - * request. \ - * other revs: D_ESC_R_PEND bit reads as 0 \ - */ \ - DMAWAIT(sc, L64854_GCSR(sc) & D_ESC_R_PEND, "R_PEND", dontpanic);\ - csr = L64854_GCSR(sc); \ - csr &= ~(L64854_WRITE|L64854_EN_DMA); /* no-ops on ENET */ \ - csr |= L64854_INVALIDATE; /* XXX FAS ? */ \ - L64854_SCSR(sc,csr); \ -} while(0) - -void -lsi64854_reset(struct lsi64854_softc *sc) -{ - uint32_t csr; - - DMA_FLUSH(sc, 1); - csr = L64854_GCSR(sc); - - DPRINTF(LDB_ANY, ("lsi64854_reset: csr 0x%x\n", csr)); - - /* - * XXX is sync needed? - if (sc->sc_dmamap->dm_nsegs > 0) - bus_dmamap_unload(sc->sc_buffer_dmat, sc->sc_dmamap); - */ - - if (sc->sc_rev == DMAREV_HME) - L64854_SCSR(sc, csr | D_HW_RESET_FAS366); - - - csr |= L64854_RESET; /* reset DMA */ - L64854_SCSR(sc, csr); - DELAY(200); /* > 10 Sbus clocks(?) */ - - /*DMAWAIT1(sc); why was this here? */ - csr = L64854_GCSR(sc); - csr &= ~L64854_RESET; /* de-assert reset line */ - L64854_SCSR(sc, csr); - DELAY(5); /* allow a few ticks to settle */ - - csr = L64854_GCSR(sc); - csr |= L64854_INT_EN; /* enable interrupts */ - if (sc->sc_rev > DMAREV_1 && sc->sc_channel == L64854_CHANNEL_SCSI) { - if (sc->sc_rev == DMAREV_HME) - csr |= D_TWO_CYCLE; - else - csr |= D_FASTER; - } - - /* Set burst */ - switch (sc->sc_rev) { - case DMAREV_HME: - case DMAREV_2: - csr &= ~L64854_BURST_SIZE; - if (sc->sc_burst == 32) { - csr |= L64854_BURST_32; - } else if (sc->sc_burst == 16) { - csr |= L64854_BURST_16; - } else { - csr |= L64854_BURST_0; - } - break; - case DMAREV_ESC: - csr |= D_ESC_AUTODRAIN; /* Auto-drain */ - if (sc->sc_burst == 32) { - csr &= ~D_ESC_BURST; - } else - csr |= D_ESC_BURST; - break; - default: - break; - } - L64854_SCSR(sc, csr); - - if (sc->sc_rev == DMAREV_HME) { - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_ADDR, 0); - sc->sc_dmactl = csr; - } - sc->sc_active = 0; - - DPRINTF(LDB_ANY, ("lsi64854_reset: done, csr 0x%x\n", csr)); -} - -static void -lsi64854_map_scsi(void *arg, bus_dma_segment_t *segs, int nseg, int error) -{ - struct lsi64854_softc *sc; - - sc = (struct lsi64854_softc *)arg; - - if (nseg != 1) - panic("%s: cannot map %d segments\n", sc->dv_name, nseg); - - bus_dmamap_sync(sc->sc_buffer_dmat, sc->sc_dmamap, sc->sc_datain ? - BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_ADDR, - segs[0].ds_addr); -} - - -#define DMAMAX(a) (MAX_DMA_SZ - ((a) & (MAX_DMA_SZ-1))) -/* - * setup a DMA transfer - */ -int -lsi64854_setup(struct lsi64854_softc *sc, caddr_t *addr, size_t *len, - int datain, size_t *dmasize) -{ - uint32_t csr; - - DMA_FLUSH(sc, 0); - -#if 0 - DMACSR(sc) &= ~D_INT_EN; -#endif - sc->sc_dmaaddr = addr; - sc->sc_dmalen = len; - sc->sc_datain = datain; - - /* - * The rules say we cannot transfer more than the limit - * of this DMA chip (64k for old and 16Mb for new), - * and we cannot cross a 16Mb boundary. - */ - *dmasize = sc->sc_dmasize = - min(*dmasize, DMAMAX((size_t) *sc->sc_dmaaddr)); - - DPRINTF(LDB_ANY, ("dma_setup: dmasize = %ld\n", (long)sc->sc_dmasize)); - - /* - * XXX what length? - */ - if (sc->sc_rev == DMAREV_HME) { - - L64854_SCSR(sc, sc->sc_dmactl | L64854_RESET); - L64854_SCSR(sc, sc->sc_dmactl); - - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_CNT, *dmasize); - } - - /* Program the DMA address */ - if (sc->sc_dmasize) { - if (bus_dmamap_load(sc->sc_buffer_dmat, sc->sc_dmamap, - *sc->sc_dmaaddr, sc->sc_dmasize, - lsi64854_map_scsi, sc, 0) != 0) - panic("%s: cannot allocate DVMA address", sc->dv_name); - } - - if (sc->sc_rev == DMAREV_ESC) { - /* DMA ESC chip bug work-around */ - long bcnt = sc->sc_dmasize; - long eaddr = bcnt + (long)*sc->sc_dmaaddr; - if ((eaddr & PAGE_MASK_8K) != 0) - bcnt = roundup(bcnt, PAGE_SIZE_8K); - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_CNT, - bcnt); - } - - /* Setup DMA control register */ - csr = L64854_GCSR(sc); - - if (datain) - csr |= L64854_WRITE; - else - csr &= ~L64854_WRITE; - csr |= L64854_INT_EN; - - if (sc->sc_rev == DMAREV_HME) { - csr |= (D_DSBL_SCSI_DRN | D_EN_DMA); - } - - L64854_SCSR(sc, csr); - - return (0); -} - -/* - * Pseudo (chained) interrupt from the esp driver to kick the - * current running DMA transfer. Called from ncr53c9x_intr() - * for now. - * - * return 1 if it was a DMA continue. - */ -int -lsi64854_scsi_intr(void *arg) -{ - struct lsi64854_softc *sc = arg; - struct ncr53c9x_softc *nsc = sc->sc_client; - int trans, resid; - uint32_t csr; - - csr = L64854_GCSR(sc); - - DPRINTF(LDB_SCSI, ("%s: dmaintr: addr 0x%x, csr %b\n", sc->dv_name, - bus_space_read_4(sc->sc_regt, sc->sc_regh, L64854_REG_ADDR), - csr, DDMACSR_BITS)); - - if (csr & (D_ERR_PEND|D_SLAVE_ERR)) { - printf("%s: error: csr=%b\n", sc->dv_name, csr, DDMACSR_BITS); - csr &= ~D_EN_DMA; /* Stop DMA */ - /* Invalidate the queue; SLAVE_ERR bit is write-to-clear */ - csr |= D_INVALIDATE|D_SLAVE_ERR; - L64854_SCSR(sc, csr); - return (-1); - } - - /* This is an "assertion" :) */ - if (sc->sc_active == 0) - panic("dmaintr: DMA wasn't active"); - - DMA_DRAIN(sc, 0); - - /* DMA has stopped */ - csr &= ~D_EN_DMA; - L64854_SCSR(sc, csr); - sc->sc_active = 0; - - if (sc->sc_dmasize == 0) { - /* A "Transfer Pad" operation completed */ - DPRINTF(LDB_SCSI, ("dmaintr: discarded %d bytes (tcl=%d, tcm=%d)\n", - NCR_READ_REG(nsc, NCR_TCL) | - (NCR_READ_REG(nsc, NCR_TCM) << 8), - NCR_READ_REG(nsc, NCR_TCL), - NCR_READ_REG(nsc, NCR_TCM))); - return 0; - } - - resid = 0; - /* - * If a transfer onto the SCSI bus gets interrupted by the device - * (e.g. for a SAVEPOINTER message), the data in the FIFO counts - * as residual since the NCR53C9X counter registers get decremented - * as bytes are clocked into the FIFO. - */ - if (!(csr & D_WRITE) && - (resid = (NCR_READ_REG(nsc, NCR_FFLAG) & NCRFIFO_FF)) != 0) { - DPRINTF(LDB_SCSI, ("dmaintr: empty esp FIFO of %d ", resid)); - if (nsc->sc_rev == NCR_VARIANT_FAS366 && - (NCR_READ_REG(nsc, NCR_CFG3) & NCRFASCFG3_EWIDE)) - resid <<= 1; - } - - if ((nsc->sc_espstat & NCRSTAT_TC) == 0) { - /* - * `Terminal count' is off, so read the residue - * out of the NCR53C9X counter registers. - */ - resid += (NCR_READ_REG(nsc, NCR_TCL) | - (NCR_READ_REG(nsc, NCR_TCM) << 8) | - ((nsc->sc_cfg2 & NCRCFG2_FE) - ? (NCR_READ_REG(nsc, NCR_TCH) << 16) - : 0)); - - if (resid == 0 && sc->sc_dmasize == 65536 && - (nsc->sc_cfg2 & NCRCFG2_FE) == 0) - /* A transfer of 64K is encoded as `TCL=TCM=0' */ - resid = 65536; - } - - trans = sc->sc_dmasize - resid; - if (trans < 0) { /* transferred < 0 ? */ -#if 0 - /* - * This situation can happen in perfectly normal operation - * if the ESP is reselected while using DMA to select - * another target. As such, don't print the warning. - */ - printf("%s: xfer (%d) > req (%d)\n", sc->dv_name, trans, - sc->sc_dmasize); -#endif - trans = sc->sc_dmasize; - } - - DPRINTF(LDB_SCSI, ("dmaintr: tcl=%d, tcm=%d, tch=%d; trans=%d, resid=%d\n", - NCR_READ_REG(nsc, NCR_TCL), - NCR_READ_REG(nsc, NCR_TCM), - (nsc->sc_cfg2 & NCRCFG2_FE) - ? NCR_READ_REG(nsc, NCR_TCH) : 0, - trans, resid)); - -#if 0 /* XXX */ - if (sc->sc_dmamap->dm_nsegs > 0) { - bus_dmamap_sync(sc->sc_buffer_dmat, sc->sc_dmamap, - (csr & D_WRITE) != 0 - ? BUS_DMASYNC_POSTREAD - : BUS_DMASYNC_POSTWRITE); - bus_dmamap_unload(sc->sc_buffer_dmat, sc->sc_dmamap); - } -#endif - - *sc->sc_dmalen -= trans; - *sc->sc_dmaaddr += trans; - -#if 0 /* this is not normal operation just yet */ - if (*sc->sc_dmalen == 0 || - nsc->sc_phase != nsc->sc_prevphase) - return 0; - - /* and again */ - dma_start(sc, sc->sc_dmaaddr, sc->sc_dmalen, DMACSR(sc) & D_WRITE); - return 1; -#endif - return 0; -} - -/* - * Pseudo (chained) interrupt to le driver to handle DMA errors. - */ -int -lsi64854_enet_intr(void *arg) -{ - struct lsi64854_softc *sc = arg; - uint32_t csr; - static int dodrain = 0; - int rv; - - csr = L64854_GCSR(sc); - - /* If the DMA logic shows an interrupt, claim it */ - rv = ((csr & E_INT_PEND) != 0) ? 1 : 0; - - if (csr & (E_ERR_PEND|E_SLAVE_ERR)) { - printf("%s: error: csr=%b\n", sc->dv_name, csr, EDMACSR_BITS); - csr &= ~L64854_EN_DMA; /* Stop DMA */ - /* Invalidate the queue; SLAVE_ERR bit is write-to-clear */ - csr |= E_INVALIDATE|E_SLAVE_ERR; - L64854_SCSR(sc, csr); - DMA_RESET(sc); - dodrain = 1; - return (1); - } - - if (dodrain) { /* XXX - is this necessary with D_DSBL_WRINVAL on? */ - int i = 10; - csr |= E_DRAIN; - L64854_SCSR(sc, csr); - while (i-- > 0 && (L64854_GCSR(sc) & D_DRAINING)) - DELAY(1); - } - - return (rv | (*sc->sc_intrchain)(sc->sc_intrchainarg)); -} - -static void -lsi64854_map_pp(void *arg, bus_dma_segment_t *segs, int nsegs, int error) -{ - struct lsi64854_softc *sc; - - sc = (struct lsi64854_softc *)arg; - - if (nsegs != 1) - panic("%s: cannot map %d segments\n", sc->dv_name, nsegs); - - bus_dmamap_sync(sc->sc_buffer_dmat, sc->sc_dmamap, sc->sc_datain - ? BUS_DMASYNC_PREREAD - : BUS_DMASYNC_PREWRITE); - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_ADDR, - segs[0].ds_addr); - - bus_space_write_4(sc->sc_regt, sc->sc_regh, L64854_REG_CNT, - sc->sc_dmasize); -} - -/* - * setup a DMA transfer - */ -int -lsi64854_setup_pp(struct lsi64854_softc *sc, caddr_t *addr, size_t *len, - int datain, size_t *dmasize) -{ - uint32_t csr; - - DMA_FLUSH(sc, 0); - - sc->sc_dmaaddr = addr; - sc->sc_dmalen = len; - sc->sc_datain = datain; - - DPRINTF(LDB_PP, ("%s: pp start %ld@%p,%d\n", sc->dv_name, - (long)*sc->sc_dmalen, *sc->sc_dmaaddr, datain ? 1 : 0)); - - /* - * the rules say we cannot transfer more than the limit - * of this DMA chip (64k for old and 16Mb for new), - * and we cannot cross a 16Mb boundary. - */ - *dmasize = sc->sc_dmasize = - min(*dmasize, DMAMAX((size_t) *sc->sc_dmaaddr)); - - DPRINTF(LDB_PP, ("dma_setup_pp: dmasize = %ld\n", (long)sc->sc_dmasize)); - - /* Program the DMA address */ - if (sc->sc_dmasize) { - if (bus_dmamap_load(sc->sc_buffer_dmat, sc->sc_dmamap, - *sc->sc_dmaaddr, sc->sc_dmasize, - lsi64854_map_pp, sc, 0) != 0) - panic("%s: pp cannot allocate DVMA address", - sc->dv_name); - } - - /* Setup DMA control register */ - csr = L64854_GCSR(sc); - csr &= ~L64854_BURST_SIZE; - if (sc->sc_burst == 32) { - csr |= L64854_BURST_32; - } else if (sc->sc_burst == 16) { - csr |= L64854_BURST_16; - } else { - csr |= L64854_BURST_0; - } - csr |= P_EN_DMA|P_INT_EN|P_EN_CNT; -#if 0 - /* This bit is read-only in PP csr register */ - if (datain) - csr |= P_WRITE; - else - csr &= ~P_WRITE; -#endif - L64854_SCSR(sc, csr); - - return (0); -} -/* - * Parallel port DMA interrupt. - */ -int -lsi64854_pp_intr(void *arg) -{ - struct lsi64854_softc *sc = arg; - int ret, trans, resid = 0; - uint32_t csr; - - csr = L64854_GCSR(sc); - - DPRINTF(LDB_PP, ("%s: pp intr: addr 0x%x, csr %b\n", sc->dv_name, - bus_space_read_4(sc->sc_regt, sc->sc_regh, L64854_REG_ADDR), - csr, PDMACSR_BITS)); - - if (csr & (P_ERR_PEND|P_SLAVE_ERR)) { - resid = bus_space_read_4(sc->sc_regt, sc->sc_regh, - L64854_REG_CNT); - printf("%s: pp error: resid %d csr=%b\n", sc->dv_name, resid, - csr, PDMACSR_BITS); - csr &= ~P_EN_DMA; /* Stop DMA */ - /* Invalidate the queue; SLAVE_ERR bit is write-to-clear */ - csr |= P_INVALIDATE|P_SLAVE_ERR; - L64854_SCSR(sc, csr); - return (1); - } - - ret = (csr & P_INT_PEND) != 0; - - if (sc->sc_active != 0) { - DMA_DRAIN(sc, 0); - resid = bus_space_read_4(sc->sc_regt, sc->sc_regh, - L64854_REG_CNT); - } - - /* DMA has stopped */ - csr &= ~D_EN_DMA; - L64854_SCSR(sc, csr); - sc->sc_active = 0; - - trans = sc->sc_dmasize - resid; - if (trans < 0) { /* transferred < 0 ? */ - trans = sc->sc_dmasize; - } - *sc->sc_dmalen -= trans; - *sc->sc_dmaaddr += trans; - -#if 0 /* XXX */ - if (sc->sc_dmamap->dm_nsegs > 0) { - bus_dmamap_sync(sc->sc_buffer_dmat, sc->sc_dmamap, - (csr & D_WRITE) != 0 - ? BUS_DMASYNC_POSTREAD - : BUS_DMASYNC_POSTWRITE); - bus_dmamap_unload(sc->sc_buffer_dmat, sc->sc_dmamap); - } -#endif - - return (ret != 0); -} |