/* $NetBSD: esp_mca.c,v 1.22 2016/07/14 10:19:06 msaitoh Exp $ */ /*- * Copyright (c) 2001 The NetBSD Foundation, Inc. * All rights reserved. * * This code is derived from software contributed to The NetBSD Foundation * by Jaromir Dolecek . * * 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. */ /* * Driver for NCR 53c90, MCA version, with 86c01 DMA controller chip. * * Some of the information used to write this driver was taken * from Tymm Twillman 's Linux MCA NC53c90 driver, * in drivers/scsi/mca_53c9x.c */ #include __KERNEL_RCSID(0, "$NetBSD: esp_mca.c,v 1.22 2016/07/14 10:19:06 msaitoh Exp $"); #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #include #if 0 #if defined(DEBUG) && !defined(NCR53C9X_DEBUG) #define NCR53C9X_DEBUG #endif #endif #ifdef NCR53C9X_DEBUG static int esp_mca_debug = 0; #define DPRINTF(x) if (esp_mca_debug) printf x; #else #define DPRINTF(x) #endif #define ESP_MCA_IOSIZE 0x20 #define ESP_REG_OFFSET 0x10 static int esp_mca_match(device_t, cfdata_t, void *); static void esp_mca_attach(device_t, device_t, void *); CFATTACH_DECL_NEW(esp_mca, sizeof(struct esp_softc), esp_mca_match, esp_mca_attach, NULL, NULL); /* * Functions and the switch for the MI code. */ static uint8_t esp_read_reg(struct ncr53c9x_softc *, int); static void esp_write_reg(struct ncr53c9x_softc *, int, uint8_t); static int esp_dma_isintr(struct ncr53c9x_softc *); static void esp_dma_reset(struct ncr53c9x_softc *); static int esp_dma_intr(struct ncr53c9x_softc *); static int esp_dma_setup(struct ncr53c9x_softc *, uint8_t **, size_t *, int, size_t *); static void esp_dma_go(struct ncr53c9x_softc *); static void esp_dma_stop(struct ncr53c9x_softc *); static int esp_dma_isactive(struct ncr53c9x_softc *); static 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 */ }; static int esp_mca_match(device_t parent, cfdata_t cf, void *aux) { struct mca_attach_args *ma = aux; switch (ma->ma_id) { case MCA_PRODUCT_NCR53C90: return 1; } return 0; } static void esp_mca_attach(device_t parent, device_t self, void *aux) { struct esp_softc *esc = device_private(self); struct ncr53c9x_softc *sc = &esc->sc_ncr53c9x; struct mca_attach_args *ma = aux; uint16_t iobase; int scsi_id, irq, drq, error; bus_space_handle_t ioh; int pos2, pos3, pos5; static const uint16_t ncrmca_iobase[] = { 0, 0x240, 0x340, 0x400, 0x420, 0x3240, 0x8240, 0xa240 }; sc->sc_dev = self; /* * NCR SCSI Adapter (ADF 7f4f) * * POS register 2: (adf pos0) * * 7 6 5 4 3 2 1 0 * \_/ \___/ \__ enable: 0=adapter disabled, 1=adapter enabled * | \____ I/O base (32B): 001=0x240 010=0x340 011=0x400 * | 100=0x420 101=0x3240 110=0x8240 111=0xa240 * \__________ IRQ: 00=3 01=5 10=7 11=9 * * POS register 3: (adf pos1) * * 7 6 5 4 3 2 1 0 * 1 1 1 | \_____/ * | \__ DMA level * \_________ Fairness: 1=enabled 0=disabled * * POS register 5: (adf pos3) * * 7 6 5 4 3 2 1 0 * 1 | \___/ * | \__ Static Ram: 0xC8000-0xC87FF + XX*0x4000 * \___________ Host Adapter ID: 1=7 0=6 */ pos2 = mca_conf_read(ma->ma_mc, ma->ma_slot, 2); pos3 = mca_conf_read(ma->ma_mc, ma->ma_slot, 3); pos5 = mca_conf_read(ma->ma_mc, ma->ma_slot, 5); iobase = ncrmca_iobase[(pos2 & 0x0e) >> 1]; irq = 3 + 2 * ((pos2 & 0x30) >> 4); drq = (pos3 & 0x0f); scsi_id = 6 + ((pos5 & 0x20) ? 1 : 0); aprint_normal(" slot %d irq %d drq %d: NCR SCSI Adapter\n", ma->ma_slot + 1, irq, drq); /* Map the 86C01 registers */ if (bus_space_map(ma->ma_iot, iobase, ESP_MCA_IOSIZE, 0, &ioh)) { aprint_error_dev(sc->sc_dev, "can't map i/o space\n"); return; } esc->sc_iot = ma->ma_iot; esc->sc_ioh = ioh; /* Submap the 'esp' registers */ if (bus_space_subregion(ma->ma_iot, ioh, ESP_REG_OFFSET, ESP_MCA_IOSIZE-ESP_REG_OFFSET, &esc->sc_esp_ioh)) { aprint_error_dev(sc->sc_dev, "can't subregion i/o space\n"); return; } /* Setup DMA map */ esc->sc_dmat = ma->ma_dmat; if ((error = mca_dmamap_create(esc->sc_dmat, MAXPHYS, BUS_DMA_NOWAIT | BUS_DMA_ALLOCNOW | MCABUS_DMA_IOPORT, &esc->sc_xfer, drq)) != 0){ aprint_error_dev(sc->sc_dev, "couldn't create DMA map - error %d\n", error); return; } /* MI code glue */ sc->sc_id = scsi_id; sc->sc_freq = 25; /* MHz */ sc->sc_glue = &esp_glue; sc->sc_cfg1 = sc->sc_id | NCRCFG1_PARENB; //| NCRCFG1_SLOW; /* No point setting sc_cfg[2345], they won't be used */ sc->sc_rev = NCR_VARIANT_NCR53C90_86C01; sc->sc_minsync = 0; /* max 64KB DMA */ sc->sc_maxxfer = 64 * 1024; /* Establish interrupt */ esc->sc_ih = mca_intr_establish(ma->ma_mc, irq, IPL_BIO, ncr53c9x_intr, esc); if (esc->sc_ih == NULL) { aprint_error_dev(sc->sc_dev, "couldn't establish interrupt\n"); return; } /* * Massage the 86C01 chip - setup MCA DMA controller for DMA via * the 86C01 register, and enable 86C01 interrupts. */ mca_dma_set_ioport(drq, iobase + N86C01_PIO); bus_space_write_1(esc->sc_iot, esc->sc_ioh, N86C01_MODE_ENABLE, bus_space_read_1(esc->sc_iot, esc->sc_ioh, N86C01_MODE_ENABLE) | N86C01_INTR_ENABLE); /* * Now try to attach all the sub-devices */ sc->sc_adapter.adapt_minphys = minphys; sc->sc_adapter.adapt_request = ncr53c9x_scsipi_request; /* Do the common parts of attachment. */ aprint_normal("%s", device_xname(self)); ncr53c9x_attach(sc); } /* * Glue functions. */ static uint8_t esp_read_reg(struct ncr53c9x_softc *sc, int reg) { struct esp_softc *esc = (struct esp_softc *)sc; return bus_space_read_1(esc->sc_iot, esc->sc_esp_ioh, reg); } static void esp_write_reg(struct ncr53c9x_softc *sc, int reg, uint8_t val) { struct esp_softc *esc = (struct esp_softc *)sc; bus_space_write_1(esc->sc_iot, esc->sc_esp_ioh, reg, val); } static int esp_dma_isintr(struct ncr53c9x_softc *sc) { struct esp_softc *esc = (struct esp_softc *)sc; DPRINTF(("[esp_dma_isintr] ")); return bus_space_read_1(esc->sc_iot, esc->sc_ioh, N86C01_STATUS) & N86C01_IRQ_PEND; } static void esp_dma_reset(struct ncr53c9x_softc *sc) { struct esp_softc *esc = (struct esp_softc *)sc; DPRINTF(("[esp_dma_reset] ")); if (esc->sc_flags & ESP_XFER_LOADED) { bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); esc->sc_flags &= ~ESP_XFER_LOADED; } if (esc->sc_flags & ESP_XFER_ACTIVE) { esc->sc_flags &= ~ESP_XFER_ACTIVE; mca_disk_unbusy(); } } static int esp_dma_intr(struct ncr53c9x_softc *sc) { struct esp_softc *esc = (struct esp_softc *)sc; DPRINTF(("[esp_dma_intr] ")); if ((esc->sc_flags & ESP_XFER_ACTIVE) == 0) { printf("%s: dma_intr--inactive DMA\n", device_xname(sc->sc_dev)); return -1; } if ((sc->sc_espintr & NCRINTR_BS) == 0) { esc->sc_flags &= ~ESP_XFER_ACTIVE; mca_disk_unbusy(); return 0; } sc->sc_espstat |= NCRSTAT_TC; /* XXX */ if ((sc->sc_espstat & NCRSTAT_TC) == 0) { printf("%s: DMA not complete?\n", device_xname(sc->sc_dev)); return 1; } bus_dmamap_sync(esc->sc_dmat, esc->sc_xfer, 0, *esc->sc_xfer_len, (esc->sc_flags & ESP_XFER_READ) ? BUS_DMASYNC_POSTREAD : BUS_DMASYNC_POSTWRITE); bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); esc->sc_flags &= ~ESP_XFER_LOADED; *esc->sc_xfer_addr += *esc->sc_xfer_len; *esc->sc_xfer_len = 0; esc->sc_flags &= ~ESP_XFER_ACTIVE; mca_disk_unbusy(); return 0; } /* * Setup DMA transfer. */ static int esp_dma_setup(struct ncr53c9x_softc *sc, uint8_t **addr, size_t *len, int datain, size_t *dmasize) { struct esp_softc *esc = (struct esp_softc *)sc; int error; int fl; DPRINTF(("[esp_dma_setup] ")); if (esc->sc_flags & ESP_XFER_LOADED) { printf("%s: %s: unloading leaked xfer\n", device_xname(sc->sc_dev), __func__); bus_dmamap_unload(esc->sc_dmat, esc->sc_xfer); esc->sc_flags &= ~ESP_XFER_LOADED; } /* Load the buffer for DMA transfer. */ fl = (datain) ? BUS_DMA_READ : BUS_DMA_WRITE; if ((error = bus_dmamap_load(esc->sc_dmat, esc->sc_xfer, *addr, *len, NULL, BUS_DMA_STREAMING|fl))) { printf("%s: %s: unable to load DMA buffer - error %d\n", device_xname(sc->sc_dev), __func__, error); return error; } bus_dmamap_sync(esc->sc_dmat, esc->sc_xfer, 0, *len, (datain) ? BUS_DMASYNC_PREREAD : BUS_DMASYNC_PREWRITE); esc->sc_flags |= ESP_XFER_LOADED | (datain ? ESP_XFER_READ : 0); esc->sc_xfer_addr = addr; esc->sc_xfer_len = len; return 0; } static void esp_dma_go(struct ncr53c9x_softc *sc) { struct esp_softc *esc = (struct esp_softc *)sc; DPRINTF(("[esp_dma_go] ")); esc->sc_flags |= ESP_XFER_ACTIVE; mca_disk_busy(); } static void esp_dma_stop(struct ncr53c9x_softc *sc) { DPRINTF(("[esp_dma_stop] ")); panic("%s: stop not yet implemented", device_xname(sc->sc_dev)); } static int esp_dma_isactive(struct ncr53c9x_softc *sc) { struct esp_softc *esc = (struct esp_softc *)sc; DPRINTF(("[esp_dma_isactive] ")); return esc->sc_flags & ESP_XFER_ACTIVE; }