FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/tcic2_isa.c

     /*      $NetBSD: tcic2_isa.c,v 1.9 2002/10/02 03:10:50 thorpej Exp $    */
     
     /*
      *
      * Copyright (c) 1998, 1999 Christoph Badura. All rights reserved.
      * Copyright (c) 1997 Marc Horowitz.  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.
     * 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.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by Marc Horowitz.
     * 4. 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 ``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 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 <sys/cdefs.h>
    __KERNEL_RCSID(0, "$NetBSD: tcic2_isa.c,v 1.9 2002/10/02 03:10:50 thorpej Exp $");
    
    #undef  TCICISADEBUG
    
    #include <sys/param.h>
    #include <sys/systm.h>
    #include <sys/device.h>
    #include <sys/extent.h>
    #include <sys/malloc.h>
    
    #include <machine/bus.h>
    #include <machine/intr.h>
    
    #include <dev/isa/isareg.h>
    #include <dev/isa/isavar.h>
    
    #include <dev/pcmcia/pcmciareg.h>
    #include <dev/pcmcia/pcmciavar.h>
    #include <dev/pcmcia/pcmciachip.h>
    
    #include <dev/ic/tcic2reg.h>
    #include <dev/ic/tcic2var.h>
    
    /*****************************************************************************
     * Configurable parameters.
     *****************************************************************************/
    
    #include "opt_tcic_isa_alloc_iobase.h"
    #include "opt_tcic_isa_alloc_iosize.h"
    #include "opt_tcic_isa_intr_alloc_mask.h"
    
    /*
     * Default I/O allocation range.  If both are set to non-zero, these
     * values will be used instead.  Otherwise, the code attempts to probe
     * the bus width.  Systems with 10 address bits should use 0x300 and 0xff.
     * Systems with 12 address bits (most) should use 0x400 and 0xbff.
     */
    
    #ifndef TCIC_ISA_ALLOC_IOBASE
    #define TCIC_ISA_ALLOC_IOBASE           0
    #endif
    
    #ifndef TCIC_ISA_ALLOC_IOSIZE
    #define TCIC_ISA_ALLOC_IOSIZE           0
    #endif
    
    int     tcic_isa_alloc_iobase = TCIC_ISA_ALLOC_IOBASE;
    int     tcic_isa_alloc_iosize = TCIC_ISA_ALLOC_IOSIZE;
    
    /*
     * Default IRQ allocation bitmask.  This defines the range of allowable
     * IRQs for PCMCIA slots.  Useful if order of probing would screw up other
     * devices, or if TCIC hardware/cards have trouble with certain interrupt
     * lines.
     *
     * We disable IRQ 10 by default, since some common laptops (namely, the
     * NEC Versa series) reserve IRQ 10 for the docking station SCSI interface.
     *
     * XXX Do we care about this?  the Versa doesn't use a tcic. -chb
     */
    
    #ifndef TCIC_ISA_INTR_ALLOC_MASK
    #define TCIC_ISA_INTR_ALLOC_MASK        0xffff
    #endif
    
   int     tcic_isa_intr_alloc_mask = TCIC_ISA_INTR_ALLOC_MASK;
   
   /*****************************************************************************
    * End of configurable parameters.
    *****************************************************************************/
   
   #ifdef TCICISADEBUG
   int     tcic_isa_debug = 1;
   #define DPRINTF(arg) if (tcic_isa_debug) printf arg;
   #else
   #define DPRINTF(arg)
   #endif
   
   int     tcic_isa_probe __P((struct device *, struct cfdata *, void *));
   void    tcic_isa_attach __P((struct device *, struct device *, void *));
   
   void    *tcic_isa_chip_intr_establish __P((pcmcia_chipset_handle_t,
               struct pcmcia_function *, int, int (*) (void *), void *));
   void    tcic_isa_chip_intr_disestablish __P((pcmcia_chipset_handle_t, void *));
   
   CFATTACH_DECL(tcic_isa, sizeof(struct tcic_softc),
       tcic_isa_probe, tcic_isa_attach, NULL, NULL);
   
   static struct pcmcia_chip_functions tcic_isa_functions = {
           tcic_chip_mem_alloc,
           tcic_chip_mem_free,
           tcic_chip_mem_map,
           tcic_chip_mem_unmap,
   
           tcic_chip_io_alloc,
           tcic_chip_io_free,
           tcic_chip_io_map,
           tcic_chip_io_unmap,
   
           tcic_isa_chip_intr_establish,
           tcic_isa_chip_intr_disestablish,
   
           tcic_chip_socket_enable,
           tcic_chip_socket_disable,
   };
   
   int
   tcic_isa_probe(parent, match, aux)
           struct device *parent;
           struct cfdata *match;
           void *aux;
   {
           struct isa_attach_args *ia = aux;
           bus_space_tag_t iot = ia->ia_iot;
           bus_space_handle_t ioh, memh;
           int val, found, msize;
   
           if (ia->ia_nio < 1)
                   return (0);
           if (ia->ia_niomem < 1)
                   return (0);
   
           if (ISA_DIRECT_CONFIG(ia))
                   return (0);
   
           /* Disallow wildcarded i/o address. */
           if (ia->ia_io[0].ir_addr == ISACF_PORT_DEFAULT)
                   return (0);
           if (ia->ia_iomem[0].ir_addr == ISACF_IOMEM_DEFAULT)
                   return (0);
   
           if (bus_space_map(iot, ia->ia_io[0].ir_addr, TCIC_IOSIZE, 0, &ioh))
                   return (0);
   
           if (ia->ia_iomem[0].ir_size == ISACF_IOSIZ_DEFAULT)
                   msize = TCIC_MEMSIZE;
           else
                   msize = ia->ia_iomem[0].ir_size;
   
           if (bus_space_map(ia->ia_memt, ia->ia_iomem[0].ir_addr,
               msize, 0, &memh)) {
                   bus_space_unmap(iot, ioh, TCIC_IOSIZE);
                   return (0);
           }
   
           DPRINTF(("tcic probing 0x%03x\n", ia->ia_iobase));
           found = 0;
   
           /*
            * First, check for the reserved bits to be zero.
            */
           if (tcic_check_reserved_bits(iot, ioh)) {
                   DPRINTF(("tcic: reserved bits checked OK\n"));
                   /* Second, check whether the we know how to handle the chip. */
                   if ((val = tcic_chipid(iot, ioh))) {
                           DPRINTF(("tcic id: 0x%02x\n", val));
                           if (tcic_chipid_known(val))
                                   found++;
                   }
           }
           else
                   DPRINTF(("tcic: reserved bits didn't check OK\n"));
   
           bus_space_unmap(iot, ioh, TCIC_IOSIZE);
           bus_space_unmap(ia->ia_memt, memh, msize);
   
           if (!found)
                   return (0);
   
           ia->ia_nio = 1;
           ia->ia_io[0].ir_size = TCIC_IOSIZE;
   
           ia->ia_niomem = 1;
           ia->ia_iomem[0].ir_size = msize;
   
           /* IRQ is special. */
   
           ia->ia_ndrq = 0;
   
           return (1);
   }
   
   void
   tcic_isa_attach(parent, self, aux)
           struct device *parent, *self;
           void *aux;
   {
           struct tcic_softc *sc = (void *) self;
           struct isa_attach_args *ia = aux;
           isa_chipset_tag_t ic = ia->ia_ic;
           bus_space_tag_t iot = ia->ia_iot;
           bus_space_tag_t memt = ia->ia_memt;
           bus_space_handle_t ioh;
           bus_space_handle_t memh;
   
           /* Map i/o space. */
           if (bus_space_map(iot, ia->ia_io[0].ir_addr, TCIC_IOSIZE, 0, &ioh)) {
                   printf(": can't map i/o space\n");
                   return;
           }
   
           /* Map mem space. */
           if (bus_space_map(memt, ia->ia_iomem[0].ir_addr,
               ia->ia_iomem[0].ir_size, 0, &memh)) {
                   printf(": can't map mem space\n");
                   return;
           }
   
           sc->membase = ia->ia_iomem[0].ir_addr;
           sc->subregionmask =
               (1 << (ia->ia_iomem[0].ir_size / TCIC_MEM_PAGESIZE)) - 1;
           sc->memsize2 = tcic_log2((u_int)ia->ia_iomem[0].ir_size);
   
           sc->intr_est = ic;
           sc->pct = (pcmcia_chipset_tag_t) & tcic_isa_functions;
   
           sc->iot = iot;
           sc->ioh = ioh;
           sc->memt = memt;
           sc->memh = memh;
   
           /*
            * determine chip type and initialise some chip type dependend
            * parameters in softc.
            */
           sc->chipid = tcic_chipid(iot, ioh);
           sc->validirqs = tcic_validirqs(sc->chipid);
   
           /*
            * allocate an irq.  interrupts are relatively
            * scarce but for TCIC controllers very infrequent.
            */
   
           if (ia->ia_nirq < 1)
                   sc->irq = ISACF_IRQ_DEFAULT;
           else
                   sc->irq = ia->ia_irq[0].ir_irq;
           if (sc->irq == ISACF_IRQ_DEFAULT) {
                   if (isa_intr_alloc(ic,
                       sc->validirqs & (tcic_isa_intr_alloc_mask & 0xff00),
                       IST_EDGE, &sc->irq)) {
                           printf("\n%s: can't allocate interrupt\n",
                               sc->dev.dv_xname);
                           return;
                   }
                   printf(": using irq %d", sc->irq);
           }
           printf("\n");
   
           tcic_attach(sc);
   
   
           /*
            * XXX mycroft recommends I/O space range 0x400-0xfff.
            */
   
           /*
            * XXX some hardware doesn't seem to grok addresses in 0x400 range--
            * apparently missing a bit or more of address lines. (e.g.
            * CIRRUS_PD672X with Linksys EthernetCard ne2000 clone in TI
            * TravelMate 5000--not clear which is at fault)
            * 
            * Add a kludge to detect 10 bit wide buses and deal with them,
            * and also a config file option to override the probe.
            */
   
   #if 0
           /*
            * This is what we'd like to use, but...
            */
           sc->iobase = 0x400;
           sc->iosize = 0xbff;
   #else
           /*
            * ...the above bus width probe doesn't always work.
            * So, experimentation has shown the following range
            * to not lose on systems that 0x300-0x3ff loses on
            * (e.g. the NEC Versa 6030X).
            */
           sc->iobase = 0x330;
           sc->iosize = 0x0cf;
   #endif
   
           DPRINTF(("%s: bus_space_alloc range 0x%04lx-0x%04lx)\n",
               sc->dev.dv_xname, (long) sc->iobase,
               (long) sc->iobase + sc->iosize));
   
           if (tcic_isa_alloc_iobase && tcic_isa_alloc_iosize) {
                   sc->iobase = tcic_isa_alloc_iobase;
                   sc->iosize = tcic_isa_alloc_iosize;
   
                   DPRINTF(("%s: bus_space_alloc range 0x%04lx-0x%04lx "
                       "(config override)\n", sc->dev.dv_xname, (long) sc->iobase,
                       (long) sc->iobase + sc->iosize));
           }
           sc->ih = isa_intr_establish(ic, sc->irq, IST_EDGE, IPL_TTY,
               tcic_intr, sc);
           if (sc->ih == NULL) {
                   printf("%s: can't establish interrupt\n", sc->dev.dv_xname);
                   return;
           }
   
           tcic_attach_sockets(sc);
   }
   
   void *
   tcic_isa_chip_intr_establish(pch, pf, ipl, fct, arg)
           pcmcia_chipset_handle_t pch;
           struct pcmcia_function *pf;
           int ipl;
           int (*fct) __P((void *));
           void *arg;
   {
           struct tcic_handle *h = (struct tcic_handle *) pch;
           int irq, ist;
           void *ih;
   
           DPRINTF(("%s: tcic_isa_chip_intr_establish\n", h->sc->dev.dv_xname));
   
           /* XXX should we convert level to pulse? -chb  */
           if (pf->cfe->flags & PCMCIA_CFE_IRQLEVEL)
                   ist = IST_LEVEL;
           else if (pf->cfe->flags & PCMCIA_CFE_IRQPULSE)
                   ist = IST_PULSE;
           else
                   ist = IST_LEVEL;
   
           if (isa_intr_alloc(h->sc->intr_est,
               h->sc->validirqs & tcic_isa_intr_alloc_mask, ist, &irq))
                   return (NULL);
           if ((ih = isa_intr_establish(h->sc->intr_est, irq, ist, ipl,
               fct, arg)) == NULL)
                   return (NULL);
   
           DPRINTF(("%s: intr estrablished\n", h->sc->dev.dv_xname));
   
           h->ih_irq = irq;
   
           printf("%s: card irq %d\n", h->pcmcia->dv_xname, irq);
   
           return (ih);
   }
   
   void 
   tcic_isa_chip_intr_disestablish(pch, ih)
           pcmcia_chipset_handle_t pch;
           void *ih;
   {
           struct tcic_handle *h = (struct tcic_handle *) pch;
           int val, reg;
   
           DPRINTF(("%s: tcic_isa_chip_intr_disestablish\n", h->sc->dev.dv_xname));
   
           h->ih_irq = 0;
   
           reg = TCIC_IR_SCF1_N(h->sock);
           val = tcic_read_ind_2(h, reg);
           val &= ~TCIC_SCF1_IRQ_MASK;
           tcic_write_ind_2(h, reg, val);
   
           isa_intr_disestablish(h->sc->intr_est, ih);
   }

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