sys/dev/pcmcia/fdc_pcmcia.c

   1 /*      $NetBSD: fdc_pcmcia.c,v 1.19 2008/03/16 00:58:56 cube Exp $     */
   2
   3 /*-
   4  * Copyright (c) 1998, 2004 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Christos Zoulas.
   9  *
  10  * Redistribution and use in source and binary forms, with or without
  11  * modification, are permitted provided that the following conditions
  12  * are met:
  13  * 1. Redistributions of source code must retain the above copyright
  14  *    notice, this list of conditions and the following disclaimer.
  15  * 2. Redistributions in binary form must reproduce the above copyright
  16  *    notice, this list of conditions and the following disclaimer in the
  17  *    documentation and/or other materials provided with the distribution.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  29  * POSSIBILITY OF SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 __KERNEL_RCSID(0, "$NetBSD: fdc_pcmcia.c,v 1.19 2008/03/16 00:58:56 cube Exp $");
  34
  35 #include <sys/param.h>
  36 #include <sys/systm.h>
  37 #include <sys/conf.h>
  38 #include <sys/device.h>
  39 #include <sys/disk.h>
  40 #include <sys/buf.h>
  41
  42 #include <sys/bus.h>
  43 #include <sys/intr.h>
  44
  45 #include <dev/pcmcia/pcmciareg.h>
  46 #include <dev/pcmcia/pcmciavar.h>
  47 #include <dev/pcmcia/pcmciadevs.h>
  48
  49 #include <dev/isa/isavar.h>
  50
  51 #include <dev/isa/fdreg.h>
  52 #include <dev/isa/fdcvar.h>
  53
  54 struct fdc_pcmcia_softc {
  55         struct fdc_softc sc_fdc;                /* real "fdc" softc */
  56
  57         struct pcmcia_function *sc_pf;          /* our PCMCIA function */
  58 };
  59
  60 int fdc_pcmcia_match(device_t, cfdata_t, void *);
  61 int fdc_pcmcia_validate_config(struct pcmcia_config_entry *);
  62 void fdc_pcmcia_attach(device_t, device_t, void *);
  63 static void fdc_conf(struct fdc_softc *);
  64
  65 CFATTACH_DECL_NEW(fdc_pcmcia, sizeof(struct fdc_pcmcia_softc),
  66     fdc_pcmcia_match, fdc_pcmcia_attach, NULL, NULL);
  67
  68 const struct pcmcia_product fdc_pcmcia_products[] = {
  69         { PCMCIA_VENDOR_YEDATA, PCMCIA_PRODUCT_YEDATA_EXTERNAL_FDD,
  70           PCMCIA_CIS_YEDATA_EXTERNAL_FDD },
  71 };
  72 const size_t fdc_pcmcia_nproducts =
  73     sizeof(fdc_pcmcia_products) / sizeof(fdc_pcmcia_products[0]);
  74
  75 static void
  76 fdc_conf(struct fdc_softc *fdc)
  77 {
  78         bus_space_tag_t iot = fdc->sc_iot;
  79         bus_space_handle_t ioh = fdc->sc_ioh;
  80         int n;
  81
  82         /* Figure out what we have */
  83         if (out_fdc_cmd(iot, ioh, FDC_CMD_VERSION) == -1 ||
  84             (n = fdcresult(fdc, 1)) != 1)
  85                 return;
  86
  87         /* Nec765 or equivalent */
  88         if (FDC_ST0(fdc->sc_status[0]) == FDC_ST0_INVL)
  89                 return;
  90
  91 #if 0
  92         /* ns8477 check */
  93         if (out_fdc_cmd(iot, ioh, FDC_CMD_NSC) == -1 ||
  94             (n = fdcresult(fdc, 1)) != 1) {
  95                 printf("NSC command failed\n");
  96                 return;
  97         }
  98         else
  99                 printf("Version %x\n", fdc->sc_status[0]);
 100 #endif
 101
 102         if (out_fdc_cmd(iot, ioh, FDC_CMD_DUMPREG) == -1 ||
 103             (n = fdcresult(fdc, -1)) == -1)
 104                 return;
 105
 106         /*
 107          * Expect 10 bytes of status; one means that it did not
 108          * understand the command
 109          */
 110         if (n == 1)
 111                 return;
 112
 113         /*
 114          * Configure controller to use FIFO and 8 bytes of FIFO threshold
 115          */
 116         (void)out_fdc_cmd(iot, ioh, FDC_CMD_CONFIGURE);
 117         (void)out_fdc(iot, ioh, 0x00);  /* doc says 0 */
 118         (void)out_fdc(iot, ioh, 8);     /* FIFO is active low. */
 119         (void)out_fdc(iot, ioh, fdc->sc_status[9]); /* same comp */
 120         /* No result phase */
 121
 122         /* Lock this configuration */
 123         if (out_fdc_cmd(iot, ioh, FDC_CMD_LOCK(FDC_CMD_FLAGS_LOCK)) == -1 ||
 124             fdcresult(fdc, 1) != 1)
 125                 return;
 126 }
 127
 128 int
 129 fdc_pcmcia_match(device_t parent, cfdata_t match, void *aux)
 130 {
 131         struct pcmcia_attach_args *pa = aux;
 132
 133         if (pcmcia_product_lookup(pa, fdc_pcmcia_products, fdc_pcmcia_nproducts,
 134             sizeof(fdc_pcmcia_products[0]), NULL))
 135                 return (1);
 136         return (0);
 137 }
 138
 139 void
 140 fdc_pcmcia_attach(device_t parent, device_t self, void *aux)
 141 {
 142         struct fdc_pcmcia_softc *psc = device_private(self);
 143         struct fdc_softc *fdc = &psc->sc_fdc;
 144         struct pcmcia_attach_args *pa = aux;
 145         struct pcmcia_config_entry *cfe;
 146         struct pcmcia_function *pf = pa->pf;
 147         struct fdc_attach_args fa;
 148         int error;
 149
 150         fdc->sc_dev = self;
 151         psc->sc_pf = pf;
 152
 153         error = pcmcia_function_configure(pf, fdc_pcmcia_validate_config);
 154         if (error) {
 155                 aprint_error_dev(self, "configure failed, error=%d\n", error);
 156                 return;
 157         }
 158
 159         cfe = pf->cfe;
 160         fdc->sc_iot = cfe->iospace[0].handle.iot;
 161         fdc->sc_iot = cfe->iospace[0].handle.ioh;
 162
 163         if (pcmcia_function_enable(pf))
 164                 goto fail;
 165
 166         fdc->sc_flags = FDC_HEADSETTLE;
 167         fdc->sc_state = DEVIDLE;
 168         TAILQ_INIT(&fdc->sc_drives);
 169
 170         if (!fdcfind(fdc->sc_iot, fdc->sc_ioh, 1))
 171                 aprint_error_dev(self, "coundn't find fdc\n");
 172
 173         fdc_conf(fdc);
 174
 175         /* Establish the interrupt handler. */
 176         fdc->sc_ih = pcmcia_intr_establish(pa->pf, IPL_BIO, fdchwintr, fdc);
 177         if (!fdc->sc_ih)
 178                 goto fail;
 179
 180         /* physical limit: four drives per controller. */
 181         for (fa.fa_drive = 0; fa.fa_drive < 4; fa.fa_drive++) {
 182                 if (fa.fa_drive < 2)
 183                         fa.fa_deftype = &fd_types[0];
 184                 else
 185                         fa.fa_deftype = NULL;           /* unknown */
 186                 (void)config_found(self, (void *)&fa, fdprint);
 187         }
 188
 189         return;
 190
 191 fail:
 192         pcmcia_function_unconfigure(pf);
 193 }