FreeBSD/Linux Kernel Cross Reference
sys/dev/eisa/cac_eisa.c

     /*      $NetBSD: cac_eisa.c,v 1.26 2021/01/27 04:35:15 thorpej Exp $    */
     
     /*-
      * Copyright (c) 2000 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Andrew Doran.
      *
     * 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.
     */
    
    /*
     * Copyright (c) 2000 Jonathan Lemon
     * Copyright (c) 1999 by Matthew N. Dodd <winter@jurai.net>
     * 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.
     */
    
    /*
     * EISA front-end for cac(4) driver.
     */
    
    #include <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: cac_eisa.c,v 1.26 2021/01/27 04:35:15 thorpej Exp $");
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/module.h>
    #include <sys/bus.h>
    #include <sys/intr.h>
    
    #include <dev/eisa/eisavar.h>
    #include <dev/eisa/eisadevs.h>
    
    #include <dev/ic/cacreg.h>
    #include <dev/ic/cacvar.h>
    
    #include "ioconf.h"
    
    #define CAC_EISA_SLOT_OFFSET            0x0c88
    #define CAC_EISA_IOSIZE                 0x0017
    #define CAC_EISA_IOCONF                 0x38
    
    static void     cac_eisa_attach(device_t, device_t, void *);
    static int      cac_eisa_match(device_t, cfdata_t, void *);
    
    static struct   cac_ccb *cac_eisa_l0_completed(struct cac_softc *);
    static int      cac_eisa_l0_fifo_full(struct cac_softc *);
    static void     cac_eisa_l0_intr_enable(struct cac_softc *, int);
    static int      cac_eisa_l0_intr_pending(struct cac_softc *);
    static void     cac_eisa_l0_submit(struct cac_softc *, struct cac_ccb *);
    
    CFATTACH_DECL3_NEW(cac_eisa, sizeof(struct cac_softc),
        cac_eisa_match, cac_eisa_attach, NULL, NULL, cac_rescan, NULL, 0);
    
    static const struct cac_linkage cac_eisa_l0 = {
            cac_eisa_l0_completed,
            cac_eisa_l0_fifo_full,
           cac_eisa_l0_intr_enable,
           cac_eisa_l0_intr_pending,
           cac_eisa_l0_submit
   };
   
   struct cac_eisa_type {
           const char      *ct_typestr;
           const struct    cac_linkage *ct_linkage;
   };
   
   static const struct cac_eisa_type cpq4001 = {
           .ct_typestr = "IDA",
           .ct_linkage = &cac_eisa_l0
   };
   
   static const struct cac_eisa_type cpq4002 = {
           .ct_typestr = "IDA-2",
           .ct_linkage = &cac_eisa_l0
   };
   
   static const struct cac_eisa_type cpq4010 = {
           .ct_typestr = "IEAS",
           .ct_linkage = &cac_eisa_l0
   };
   
   static const struct cac_eisa_type cpq4020 = {
           .ct_typestr = "SMART",
           .ct_linkage = &cac_eisa_l0
   };
   
   static const struct cac_eisa_type cpq4030 = {
           .ct_typestr = "SMART-2/E",
           .ct_linkage = &cac_l0
   };
   
   static const struct device_compatible_entry compat_data[] = {
           { .compat = "CPQ4001",  .data = &cpq4001 },
           { .compat = "CPQ4002",  .data = &cpq4002 },
           { .compat = "CPQ4010",  .data = &cpq4010 },
           { .compat = "CPQ4020",  .data = &cpq4020 },
           { .compat = "CPQ4030",  .data = &cpq4030 },
           DEVICE_COMPAT_EOL
   };
   
   static int
   cac_eisa_match(device_t parent, cfdata_t match, void *aux)
   {
           struct eisa_attach_args *ea = aux;
   
           return (eisa_compatible_match(ea, compat_data));
   }
   
   static void
   cac_eisa_attach(device_t parent, device_t self, void *aux)
   {
           struct eisa_attach_args *ea = aux;
           const struct device_compatible_entry *dce;
           const struct cac_eisa_type *ct;
           bus_space_handle_t ioh;
           eisa_chipset_tag_t ec;
           eisa_intr_handle_t ih;
           struct cac_softc *sc;
           bus_space_tag_t iot;
           const char *intrstr;
           int irq;
           char intrbuf[EISA_INTRSTR_LEN];
   
           sc = device_private(self);
           iot = ea->ea_iot;
           ec = ea->ea_ec;
   
           if (bus_space_map(iot, EISA_SLOT_ADDR(ea->ea_slot) +
               CAC_EISA_SLOT_OFFSET, CAC_EISA_IOSIZE, 0, &ioh)) {
                   aprint_error(": can't map i/o space\n");
                   return;
           }
   
           dce = eisa_compatible_lookup(ea, compat_data);
           KASSERT(dce != NULL);
           ct = dce->data;
   
           sc->sc_dev = self;
           sc->sc_iot = iot;
           sc->sc_ioh = ioh;
           sc->sc_dmat = ea->ea_dmat;
   
           /*
            * Map and establish the interrupt.
            */
           switch (bus_space_read_1(iot, ioh, CAC_EISA_IOCONF) & 0xf0) {
           case 0x20:
                   irq = 10;
                   break;
           case 0x10:
                   irq = 11;
                   break;
           case 0x40:
                   irq = 14;
                   break;
           case 0x80:
                   irq = 15;
                   break;
           default:
                   aprint_error(": controller on invalid IRQ\n");
                   return;
           }
   
           if (eisa_intr_map(ec, irq, &ih)) {
                   aprint_error(": can't map interrupt (%d)\n", irq);
                   return;
           }
   
           intrstr = eisa_intr_string(ec, ih, intrbuf, sizeof(intrbuf));
           if ((sc->sc_ih = eisa_intr_establish(ec, ih, IST_LEVEL, IPL_BIO,
               cac_intr, sc)) == NULL) {
                   aprint_error(": can't establish interrupt");
                   if (intrstr != NULL)
                           aprint_normal(" at %s", intrstr);
                   aprint_normal("\n");
                   return;
           }
   
           /*
            * Print board type and attach to the bus-independent code.
            */
           aprint_normal(": Compaq %s\n", ct->ct_typestr);
           memcpy(&sc->sc_cl, ct->ct_linkage, sizeof(sc->sc_cl));
           cac_init(sc, intrstr, 0);
   }
   
   /*
    * Linkage specific to EISA boards.
    */
   
   static int
   cac_eisa_l0_fifo_full(struct cac_softc *sc)
   {
   
           return ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_CLEAR) == 0);
   }
   
   static void
   cac_eisa_l0_submit(struct cac_softc *sc, struct cac_ccb *ccb)
   {
           u_int16_t size;
   
           /*
            * On these boards, `ccb_hdr.size' is actually for control flags.
            * Set it to zero and pass the value by means of an I/O port.
            */
           size = le16toh(ccb->ccb_hdr.size) << 2;
           ccb->ccb_hdr.size = 0;
   
           bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap,
               (char *)ccb - (char *)sc->sc_ccbs,
               sizeof(struct cac_ccb), BUS_DMASYNC_PREWRITE | BUS_DMASYNC_PREREAD);
   
           cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
           cac_outl(sc, CAC_EISAREG_LIST_ADDR, ccb->ccb_paddr);
           cac_outw(sc, CAC_EISAREG_LIST_LEN, size);
           cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_BUSY);
   }
   
   static struct cac_ccb *
   cac_eisa_l0_completed(struct cac_softc *sc)
   {
           struct cac_ccb *ccb;
           u_int32_t off;
           u_int8_t status;
   
           if ((cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_BUSY) == 0)
                   return (NULL);
   
           cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL, CAC_EISA_CHANNEL_BUSY);
           off = cac_inl(sc, CAC_EISAREG_COMPLETE_ADDR);
           status = cac_inb(sc, CAC_EISAREG_LIST_STATUS);
           cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL, CAC_EISA_CHANNEL_CLEAR);
   
           if (off == 0)
                   return (NULL);
   
           off = (off & ~3) - sc->sc_ccbs_paddr;
           ccb = (struct cac_ccb *)((char *)sc->sc_ccbs + off);
   
           bus_dmamap_sync(sc->sc_dmat, sc->sc_dmamap, off, sizeof(struct cac_ccb),
               BUS_DMASYNC_POSTWRITE | BUS_DMASYNC_POSTREAD);
   
           ccb->ccb_req.error = status;
   
           if ((off & 3) != 0 && ccb->ccb_req.error == 0)
                   ccb->ccb_req.error = CAC_RET_CMD_REJECTED;
   
           return (ccb);
   }
   
   static int
   cac_eisa_l0_intr_pending(struct cac_softc *sc)
   {
   
           return (cac_inb(sc, CAC_EISAREG_SYSTEM_DOORBELL) &
               CAC_EISA_CHANNEL_BUSY);
   }
   
   static void
   cac_eisa_l0_intr_enable(struct cac_softc *sc, int state)
   {
   
           if (state) {
                   cac_outb(sc, CAC_EISAREG_SYSTEM_DOORBELL,
                       ~CAC_EISA_CHANNEL_CLEAR);
                   cac_outb(sc, CAC_EISAREG_LOCAL_DOORBELL,
                       CAC_EISA_CHANNEL_BUSY);
                   cac_outb(sc, CAC_EISAREG_INTR_MASK, CAC_INTR_ENABLE);
                   cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_ENABLE);
           } else
                   cac_outb(sc, CAC_EISAREG_SYSTEM_MASK, CAC_INTR_DISABLE);
   }
   
   MODULE(MODULE_CLASS_DRIVER, cac_eisa, "cac");   /* No eisa module yet! */
   
   #ifdef _MODULE
   /*
    * XXX Don't allow ioconf.c to redefine the "struct cfdriver cac_cd"
    * XXX it will be defined in the common-code module
    */
   #undef  CFDRIVER_DECL
   #define CFDRIVER_DECL(name, class, attr)
   #include "ioconf.c"
   #endif
    
   static int
   cac_eisa_modcmd(modcmd_t cmd, void *opaque)
   {
           int error = 0;
    
   #ifdef _MODULE
           switch (cmd) {
           case MODULE_CMD_INIT:
                   /* 
                    * We skip over the first entry in cfdriver[] array
                    * since the cfdriver is attached by the common
                    * (non-attachment-specific) code.
                    */
                   error = config_init_component(&cfdriver_ioconf_cac_eisa[1],
                       cfattach_ioconf_cac_eisa, cfdata_ioconf_cac_eisa);
                   break;
           case MODULE_CMD_FINI:
                   error = config_fini_component(&cfdriver_ioconf_cac_eisa[1],  
                       cfattach_ioconf_cac_eisa, cfdata_ioconf_cac_eisa);
                   break;
           default:
                   error = ENOTTY;
                   break;
           }
   #endif
   
           return error;
   }

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