/* * Product specific probe and attach routines for: * Buslogic BT-54X and BT-445 cards * * Copyright (c) 1998 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 1.1 1998/09/15 07:32:54 gibbs Exp $ */ #include #include #include #include #include #include #include static int bt_isa_probe __P((struct isa_device *dev)); static int bt_isa_attach __P((struct isa_device *dev)); static void bt_isa_intr __P((void *unit)); static bus_dma_filter_t btvlbouncefilter; static bus_dmamap_callback_t btmapsensebuffers; struct isa_driver btdriver = { bt_isa_probe, bt_isa_attach, "bt" }; /* * 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(dev) struct isa_device *dev; { /* * find unit and check we have that many defined */ struct bt_softc *bt; int port_index; int max_port_index; /* * We ignore the unit number assigned by config to allow * consistant numbering between PCI/EISA/ISA devices. * This is a total kludge until we have a configuration * manager. */ dev->id_unit = bt_unit; bt = NULL; port_index = 0; max_port_index = BT_NUM_ISAPORTS - 1; /* * Bound our board search if the user has * specified an exact port. */ if (dev->id_iobase > 0) { for (;port_index <= max_port_index; port_index++) if (dev->id_iobase >= bt_isa_ports[port_index].addr) break; if ((port_index > max_port_index) || (dev->id_iobase != bt_isa_ports[port_index].addr)) { printf(" bt_isa_probe: Invalid baseport of 0x%x specified. bt_isa_probe: Nearest valid baseport is 0x%x. bt_isa_probe: Failing probe.\n", dev->id_iobase, (port_index <= max_port_index) ? bt_isa_ports[port_index].addr : bt_isa_ports[max_port_index].addr); return 0; } } /* Attempt to find an adapter */ for (;port_index <= max_port_index; port_index++) { config_data_t config_data; u_int ioport; int error; ioport = bt_isa_ports[port_index].addr; /* * Ensure this port has not already been claimed already * by a PCI or EISA adapter. */ if (bt_check_probed_iop(ioport) != 0) continue; /* Allocate a softc for use during probing */ bt = bt_alloc(dev->id_unit, I386_BUS_SPACE_IO, ioport); if (bt == NULL) break; /* We're going to attempt to probe it now, so mark it probed */ bt_mark_probed_bio(port_index); /* See if there is really a card present */ if (bt_probe(bt) || bt_fetch_adapter_info(bt)) { bt_free(bt); continue; } /* * Determine our IRQ, and DMA settings and * export them to the configuration system. */ error = bt_cmd(bt, BOP_INQUIRE_CONFIG, NULL, /*parmlen*/0, (u_int8_t*)&config_data, sizeof(config_data), DEFAULT_CMD_TIMEOUT); if (error != 0) { printf("bt_isa_probe: Could not determine IRQ or DMA " "settings for adapter at 0x%x. Failing probe\n", ioport); bt_free(bt); continue; } if (bt->model[0] == '5') { /* DMA settings only make sense for ISA cards */ switch (config_data.dma_chan) { case DMA_CHAN_5: dev->id_drq = 5; break; case DMA_CHAN_6: dev->id_drq = 6; break; case DMA_CHAN_7: dev->id_drq = 7; break; default: printf("bt_isa_probe: Invalid DMA setting " "detected for adapter at 0x%x. " "Failing probe\n", ioport); } } else { /* VL DMA */ dev->id_drq = -1; } dev->id_iobase = bt_isa_ports[port_index].addr; dev->id_irq = (config_data.irq << 9); dev->id_intr = bt_isa_intr; bt_unit++; return (BT_NREGS); } return (0); } /* * Attach all the sub-devices we can find */ static int bt_isa_attach(dev) struct isa_device *dev; { struct bt_softc *bt; bus_dma_filter_t *filter; void *filter_arg; bus_addr_t lowaddr; bt = bt_softcs[dev->id_unit]; if (dev->id_drq != -1) isa_dmacascade(dev->id_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_free(bt); return (-1); } if (bt_init(bt)) { bt_free(bt); return (-1); } 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_free(bt); return (-1); } 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_free(bt); return (-1); } 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++; } return (bt_attach(bt)); } /* * Handle an ISA interrupt. * XXX should go away as soon as ISA interrupt handlers * take a (void *) arg. */ static void bt_isa_intr(void *unit) { struct bt_softc* arg = bt_softcs[(int)unit]; bt_intr((void *)arg); } #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; }