/* * Product specific probe and attach routines for: * Buslogic BT-54X and BT-445 cards * * Copyright (c) 1998, 1999 Justin T. Gibbs * 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, * without modification, immediately at the beginning of the file. * 2. The name of the author may not be used to endorse or promote products * derived from this software without specific prior written permission. * * 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. * * $Id: bt_isa.c,v 1.8 1999/04/18 15:50:35 peter Exp $ */ #include #include #include #include #include #include #include #include #include #include #include #include #include static bus_dma_filter_t btvlbouncefilter; static bus_dmamap_callback_t btmapsensebuffers; static int bt_isa_alloc_resources(device_t dev) { int rid; struct resource *port; struct resource *irq; struct resource *drq; rid = 0; port = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1, RF_ACTIVE); if (!port) return (ENOMEM); if (isa_get_irq(dev) != -1) { rid = 0; irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1, RF_ACTIVE); if (!irq) { if (port) bus_release_resource(dev, SYS_RES_IOPORT, 0, port); return (ENOMEM); } } else irq = 0; if (isa_get_drq(dev) != -1) { rid = 0; drq = bus_alloc_resource(dev, SYS_RES_DRQ, &rid, 0, ~0, 1, RF_ACTIVE); if (!drq) { if (port) bus_release_resource(dev, SYS_RES_IOPORT, 0, port); if (irq) bus_release_resource(dev, SYS_RES_IRQ, 0, irq); return (ENOMEM); } } else drq = 0; bt_init_softc(dev, port, irq, drq); return (0); } static void bt_isa_release_resources(device_t dev) { struct bt_softc *bt = device_get_softc(dev); if (bt->port) bus_release_resource(dev, SYS_RES_IOPORT, 0, bt->port); if (bt->irq) bus_release_resource(dev, SYS_RES_IRQ, 0, bt->irq); if (bt->drq) bus_release_resource(dev, SYS_RES_DRQ, 0, bt->drq); bt_free_softc(dev); } /* * Check if the device can be found at the port given * and if so, set it up ready for further work * as an argument, takes the isa_device structure from * autoconf.c */ static int bt_isa_probe(device_t dev) { /* * find unit and check we have that many defined */ int port_index; int max_port_index; port_index = 0; max_port_index = BT_NUM_ISAPORTS - 1; /* * Bound our board search if the user has * specified an exact port. */ bt_find_probe_range(isa_get_port(dev), &port_index, &max_port_index); if (port_index < 0) return (ENXIO); /* Attempt to find an adapter */ for (;port_index <= max_port_index; port_index++) { struct bt_probe_info info; u_int ioport; ioport = bt_iop_from_bio(port_index); isa_set_port(dev, ioport); isa_set_portsize(dev, BT_NREGS); /* * Ensure this port has not already been claimed already * by a PCI, EISA or ISA adapter. */ if (bt_check_probed_iop(ioport) != 0) continue; /* Initialise the softc for use during probing */ if (bt_isa_alloc_resources(dev) != 0) continue; /* We're going to attempt to probe it now, so mark it probed */ bt_mark_probed_bio(port_index); if (bt_port_probe(dev, &info) != 0) { printf("bt_isa_probe: Probe failed for card at 0x%x\n", ioport); bt_isa_release_resources(dev); continue; } bt_isa_release_resources(dev); isa_set_port(dev, ioport); isa_set_drq(dev, info.drq); isa_set_irq(dev, info.irq); return (0); } return (ENXIO); } /* * Attach all the sub-devices we can find */ static int bt_isa_attach(device_t dev) { struct bt_softc *bt = device_get_softc(dev); bus_dma_filter_t *filter; void *filter_arg; bus_addr_t lowaddr; int error, drq; /* Initialise softc */ error = bt_isa_alloc_resources(dev); if (error) { device_printf(dev, "can't allocate resources in bt_isa_attach\n"); return error; } /* Program the DMA channel for external control */ if ((drq = isa_get_drq(dev)) != -1) isa_dmacascade(drq); /* Allocate our parent dmatag */ filter = NULL; filter_arg = NULL; lowaddr = BUS_SPACE_MAXADDR_24BIT; if (bt->model[0] == '4') { /* * This is a VL adapter. Typically, VL devices have access * to the full 32bit address space. On BT-445S adapters * prior to revision E, there is a hardware bug that causes * corruption of transfers to/from addresses in the range of * the BIOS modulo 16MB. The only properly functioning * BT-445S Host Adapters have firmware version 3.37. * If we encounter one of these adapters and the BIOS is * installed, install a filter function for our bus_dma_map * that will catch these accesses and bounce them to a safe * region of memory. */ if (bt->bios_addr != 0 && strcmp(bt->model, "445S") == 0 && strcmp(bt->firmware_ver, "3.37") < 0) { filter = btvlbouncefilter; filter_arg = bt; } else { lowaddr = BUS_SPACE_MAXADDR_32BIT; } } /* XXX Should be a child of the ISA or VL bus dma tag */ if (bus_dma_tag_create(/*parent*/NULL, /*alignemnt*/0, /*boundary*/0, lowaddr, /*highaddr*/BUS_SPACE_MAXADDR, filter, filter_arg, /*maxsize*/BUS_SPACE_MAXSIZE_32BIT, /*nsegments*/BUS_SPACE_UNRESTRICTED, /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, /*flags*/0, &bt->parent_dmat) != 0) { bt_isa_release_resources(dev); return (ENOMEM); } error = bt_init(dev); if (error) { bt_isa_release_resources(dev); return (ENOMEM); } if (lowaddr != BUS_SPACE_MAXADDR_32BIT) { /* DMA tag for our sense buffers */ if (bus_dma_tag_create(bt->parent_dmat, /*alignment*/0, /*boundary*/0, /*lowaddr*/BUS_SPACE_MAXADDR, /*highaddr*/BUS_SPACE_MAXADDR, /*filter*/NULL, /*filterarg*/NULL, bt->max_ccbs * sizeof(struct scsi_sense_data), /*nsegments*/1, /*maxsegsz*/BUS_SPACE_MAXSIZE_32BIT, /*flags*/0, &bt->sense_dmat) != 0) { bt_isa_release_resources(dev); return (ENOMEM); } bt->init_level++; /* Allocation of sense buffers */ if (bus_dmamem_alloc(bt->sense_dmat, (void **)&bt->sense_buffers, BUS_DMA_NOWAIT, &bt->sense_dmamap) != 0) { bt_isa_release_resources(dev); return (ENOMEM); } bt->init_level++; /* And permanently map them */ bus_dmamap_load(bt->sense_dmat, bt->sense_dmamap, bt->sense_buffers, bt->max_ccbs * sizeof(*bt->sense_buffers), btmapsensebuffers, bt, /*flags*/0); bt->init_level++; } error = bt_attach(dev); if (error) { bt_isa_release_resources(dev); return (error); } return (0); } #define BIOS_MAP_SIZE (16 * 1024) static int btvlbouncefilter(void *arg, bus_addr_t addr) { struct bt_softc *bt; bt = (struct bt_softc *)arg; addr &= BUS_SPACE_MAXADDR_24BIT; if (addr == 0 || (addr >= bt->bios_addr && addr < (bt->bios_addr + BIOS_MAP_SIZE))) return (1); return (0); } static void btmapsensebuffers(void *arg, bus_dma_segment_t *segs, int nseg, int error) { struct bt_softc* bt; bt = (struct bt_softc*)arg; bt->sense_buffers_physbase = segs->ds_addr; } static device_method_t bt_isa_methods[] = { /* Device interface */ DEVMETHOD(device_probe, bt_isa_probe), DEVMETHOD(device_attach, bt_isa_attach), { 0, 0 } }; static driver_t bt_isa_driver = { "bt", bt_isa_methods, DRIVER_TYPE_CAM, sizeof(struct bt_softc), }; static devclass_t bt_devclass; DRIVER_MODULE(bt, isa, bt_isa_driver, bt_devclass, 0, 0);