/* $OpenBSD: bpp.c,v 1.3 2011/09/18 14:07:45 miod Exp $ */ /* $NetBSD: bpp.c,v 1.25 2005/12/11 12:23:44 christos 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. * * 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 #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #define splbpp() spltty() /* XXX */ #ifdef DEBUG #define DPRINTF(x) do { if (bppdebug) printf x ; } while (0) int bppdebug = 1; #else #define DPRINTF(x) #endif #if 0 struct bpp_param { int bpp_dss; /* data setup to strobe */ int bpp_dsw; /* data strobe width */ int bpp_outputpins; /* Select/Autofeed/Init pins */ int bpp_inputpins; /* Error/Select/Paperout pins */ }; #endif struct hwstate { u_int16_t hw_hcr; /* Hardware config register */ u_int16_t hw_ocr; /* Operation config register */ u_int8_t hw_tcr; /* Transfer Control register */ u_int8_t hw_or; /* Output register */ u_int16_t hw_irq; /* IRQ; polarity bits only */ }; struct bpp_softc { struct lsi64854_softc sc_lsi64854; /* base device */ size_t sc_bufsz; /* temp buffer */ caddr_t sc_buf; int sc_error; /* bottom-half error */ int sc_flags; #define BPP_LOCKED 0x01 /* DMA in progress */ #define BPP_WANT 0x02 /* Waiting for DMA */ /* Hardware state */ struct hwstate sc_hwstate; }; int bppmatch(struct device *, void *, void *); void bppattach(struct device *, struct device *, void *); int bppintr (void *); void bpp_setparams(struct bpp_softc *, struct hwstate *); const struct cfattach bpp_ca = { sizeof(struct bpp_softc), bppmatch, bppattach }; struct cfdriver bpp_cd = { NULL, "bpp", DV_DULL }; #define BPPUNIT(dev) (minor(dev)) int bppmatch(struct device *parent, void *vcf, void *aux) { struct sbus_attach_args *sa = aux; return (strcmp("SUNW,bpp", sa->sa_name) == 0); } void bppattach(struct device *parent, struct device *self, void *aux) { struct sbus_attach_args *sa = aux; struct bpp_softc *dsc = (void *)self; struct lsi64854_softc *sc = &dsc->sc_lsi64854; int burst, sbusburst; int node; node = sa->sa_node; sc->sc_bustag = sa->sa_bustag; sc->sc_dmatag = sa->sa_dmatag; /* Map device registers */ if (sa->sa_npromvaddrs != 0) { if (sbus_bus_map(sa->sa_bustag, 0, sa->sa_promvaddrs[0], sa->sa_size, /* ???? */ BUS_SPACE_MAP_PROMADDRESS, 0, &sc->sc_regs) != 0) { printf(": cannot map registers\n"); return; } } else if (sbus_bus_map(sa->sa_bustag, sa->sa_slot, sa->sa_offset, sa->sa_size, 0, 0, &sc->sc_regs) != 0) { printf(": cannot map registers\n"); return; } /* Check for the interrupt property */ if (sa->sa_nintr == 0) { printf(": no interrupt property\n"); return; } /* * Get transfer burst size from PROM and plug it into the * controller registers. This is needed on the Sun4m; do * others need it too? */ sbusburst = ((struct sbus_softc *)parent)->sc_burst; if (sbusburst == 0) sbusburst = SBUS_BURST_32 - 1; /* 1->16 */ burst = getpropint(node, "burst-sizes", -1); if (burst == -1) /* take SBus burst sizes */ burst = sbusburst; /* Clamp at parent's burst sizes */ burst &= sbusburst; sc->sc_burst = (burst & SBUS_BURST_32) ? 32 : (burst & SBUS_BURST_16) ? 16 : 0; /* Initialize the DMA channel */ sc->sc_channel = L64854_CHANNEL_PP; if (lsi64854_attach(sc) != 0) return; /* Establish interrupt handler */ sc->sc_intrchain = bppintr; sc->sc_intrchainarg = dsc; (void)bus_intr_establish(sa->sa_bustag, sa->sa_pri, IPL_TTY, 0, bppintr, sc, self->dv_xname); /* Allocate buffer XXX - should actually use dmamap_uio() */ dsc->sc_bufsz = 1024; dsc->sc_buf = malloc(dsc->sc_bufsz, M_DEVBUF, M_NOWAIT); /* XXX read default state */ { bus_space_handle_t h = sc->sc_regs; struct hwstate *hw = &dsc->sc_hwstate; int ack_rate = sa->sa_frequency/1000000; hw->hw_hcr = bus_space_read_2(sc->sc_bustag, h, L64854_REG_HCR); hw->hw_ocr = bus_space_read_2(sc->sc_bustag, h, L64854_REG_OCR); hw->hw_tcr = bus_space_read_1(sc->sc_bustag, h, L64854_REG_TCR); hw->hw_or = bus_space_read_1(sc->sc_bustag, h, L64854_REG_OR); DPRINTF(("bpp: hcr %x ocr %x tcr %x or %x\n", hw->hw_hcr, hw->hw_ocr, hw->hw_tcr, hw->hw_or)); /* Set these to sane values */ hw->hw_hcr = ((ack_rate<hw_ocr |= BPP_OCR_ACK_OP; } } void bpp_setparams(struct bpp_softc *sc, struct hwstate *hw) { u_int16_t irq; bus_space_tag_t t = sc->sc_lsi64854.sc_bustag; bus_space_handle_t h = sc->sc_lsi64854.sc_regs; bus_space_write_2(t, h, L64854_REG_HCR, hw->hw_hcr); bus_space_write_2(t, h, L64854_REG_OCR, hw->hw_ocr); bus_space_write_1(t, h, L64854_REG_TCR, hw->hw_tcr); bus_space_write_1(t, h, L64854_REG_OR, hw->hw_or); /* Only change IRP settings in interrupt status register */ irq = bus_space_read_2(t, h, L64854_REG_ICR); irq &= ~BPP_ALLIRP; irq |= (hw->hw_irq & BPP_ALLIRP); bus_space_write_2(t, h, L64854_REG_ICR, irq); DPRINTF(("bpp_setparams: hcr %x ocr %x tcr %x or %x, irq %x\n", hw->hw_hcr, hw->hw_ocr, hw->hw_tcr, hw->hw_or, irq)); } int bppopen(dev_t dev, int flags, int mode, struct proc *p) { int unit = BPPUNIT(dev); struct bpp_softc *sc; struct lsi64854_softc *lsi; u_int16_t irq; int s; if (unit >= bpp_cd.cd_ndevs) return (ENXIO); if ((sc = bpp_cd.cd_devs[unit]) == NULL) return (ENXIO); lsi = &sc->sc_lsi64854; /* Set default parameters */ s = splbpp(); bpp_setparams(sc, &sc->sc_hwstate); splx(s); /* Enable interrupts */ irq = BPP_ERR_IRQ_EN; irq |= sc->sc_hwstate.hw_irq; bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, irq); return (0); } int bppclose(dev_t dev, int flags, int mode, struct proc *p) { struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; struct lsi64854_softc *lsi = &sc->sc_lsi64854; u_int16_t irq; /* Turn off all interrupt enables */ irq = sc->sc_hwstate.hw_irq | BPP_ALLIRQ; irq &= ~BPP_ALLEN; bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, irq); sc->sc_flags = 0; return (0); } int bppwrite(dev_t dev, struct uio *uio, int flags) { struct bpp_softc *sc = bpp_cd.cd_devs[BPPUNIT(dev)]; struct lsi64854_softc *lsi = &sc->sc_lsi64854; int error = 0; int s; /* * Wait until the DMA engine is free. */ s = splbpp(); while ((sc->sc_flags & BPP_LOCKED) != 0) { if ((flags & IO_NDELAY) != 0) { splx(s); return (EWOULDBLOCK); } sc->sc_flags |= BPP_WANT; error = tsleep(sc->sc_buf, PZERO | PCATCH, "bppwrite", 0); if (error != 0) { splx(s); return (error); } } sc->sc_flags |= BPP_LOCKED; splx(s); /* * Move data from user space into our private buffer * and start DMA. */ while (uio->uio_resid > 0) { caddr_t bp = sc->sc_buf; size_t len = min(sc->sc_bufsz, uio->uio_resid); if ((error = uiomove(bp, len, uio)) != 0) break; while (len > 0) { u_int8_t tcr; size_t size = len; DMA_SETUP(lsi, &bp, &len, 0, &size); #ifdef DEBUG if (bppdebug) { int i; printf("bpp: writing %ld : ", len); for (i=0; isc_bustag, lsi->sc_regs, L64854_REG_TCR); tcr &= ~BPP_TCR_DIR; bus_space_write_1(lsi->sc_bustag, lsi->sc_regs, L64854_REG_TCR, tcr); /* Enable DMA */ s = splbpp(); DMA_GO(lsi); error = tsleep(sc, PZERO | PCATCH, "bppdma", 0); splx(s); if (error != 0) goto out; /* Bail out if bottom half reported an error */ if ((error = sc->sc_error) != 0) goto out; /* * DMA_INTR() does this part. * * len -= size; */ } } out: DPRINTF(("bpp done %x\n", error)); s = splbpp(); sc->sc_flags &= ~BPP_LOCKED; if ((sc->sc_flags & BPP_WANT) != 0) { sc->sc_flags &= ~BPP_WANT; wakeup(sc->sc_buf); } splx(s); return (error); } int bppioctl(dev_t dev, u_long cmd, caddr_t data, int flag, struct proc *p) { int error = 0; switch(cmd) { default: error = ENODEV; break; } return (error); } int bppintr(void *arg) { struct bpp_softc *sc = arg; struct lsi64854_softc *lsi = &sc->sc_lsi64854; u_int16_t irq; /* First handle any possible DMA interrupts */ if (DMA_INTR(lsi) == -1) sc->sc_error = 1; irq = bus_space_read_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR); /* Ack all interrupts */ bus_space_write_2(lsi->sc_bustag, lsi->sc_regs, L64854_REG_ICR, irq | BPP_ALLIRQ); DPRINTF(("bpp_intr: %x\n", irq)); /* Did our device interrupt? */ if ((irq & BPP_ALLIRQ) == 0) return (0); if ((sc->sc_flags & BPP_LOCKED) != 0) wakeup(sc); else if ((sc->sc_flags & BPP_WANT) != 0) { sc->sc_flags &= ~BPP_WANT; wakeup(sc->sc_buf); } return (1); }