sys/dev/pci/if_mtd_pci.c

   1 /* $NetBSD: if_mtd_pci.c,v 1.14 2009/05/06 09:25:15 cegger Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Peter Bex <Peter.Bex@student.kun.nl>.
   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 /*
  33  * PCI interface for MTD803 cards
  34  * Written by Peter Bex (peter.bex@student.kun.nl)
  35  */
  36
  37 /* TODO: Check why in IO space, the MII won't work. Memory mapped works */
  38
  39 #include <sys/cdefs.h>
  40 __KERNEL_RCSID(0, "$NetBSD: if_mtd_pci.c,v 1.14 2009/05/06 09:25:15 cegger Exp $");
  41
  42 #include <sys/param.h>
  43 #include <sys/device.h>
  44 #include <sys/systm.h>
  45 #include <sys/socket.h>
  46 #include <net/if.h>
  47 #include <net/if_ether.h>
  48 #include <net/if_media.h>
  49 #include <sys/bus.h>
  50 #include <dev/mii/miivar.h>
  51 #include <dev/ic/mtd803reg.h>
  52 #include <dev/ic/mtd803var.h>
  53 #include <dev/pci/pcidevs.h>
  54 #include <dev/pci/pcireg.h>
  55 #include <dev/pci/pcivar.h>
  56
  57 #define PCI_IO_MAP_REG          0x10
  58 #define PCI_MEM_MAP_REG         0x14
  59
  60 struct mtd_pci_device_id {
  61         pci_vendor_id_t         vendor;         /* PCI vendor ID */
  62         pci_product_id_t        product;        /* PCI product ID */
  63 };
  64
  65 static struct mtd_pci_device_id mtd_ids[] = {
  66         { PCI_VENDOR_MYSON, PCI_PRODUCT_MYSON_MTD803 },
  67         { 0, 0 }
  68 };
  69
  70 static int      mtd_pci_match(device_t, cfdata_t, void *);
  71 static void     mtd_pci_attach(device_t, device_t, void *);
  72
  73 CFATTACH_DECL(mtd_pci, sizeof(struct mtd_softc), mtd_pci_match, mtd_pci_attach,
  74     NULL, NULL);
  75
  76 static int
  77 mtd_pci_match(device_t parent, cfdata_t match, void *aux)
  78 {
  79         struct pci_attach_args *pa = aux;
  80         struct mtd_pci_device_id *id;
  81
  82         for (id = mtd_ids; id->vendor != 0; ++id) {
  83                 if (PCI_VENDOR(pa->pa_id) == id->vendor &&
  84                     PCI_PRODUCT(pa->pa_id) == id->product)
  85                         return (1);
  86         }
  87         return (0);
  88 }
  89
  90 static void
  91 mtd_pci_attach(device_t parent, device_t self, void *aux)
  92 {
  93         struct pci_attach_args * const pa = aux;
  94         struct mtd_softc * const sc = device_private(self);
  95         pci_intr_handle_t ih;
  96         const char *intrstring = NULL;
  97         bus_space_tag_t iot, memt;
  98         bus_space_handle_t ioh, memh;
  99         int io_valid, mem_valid;
 100         char devinfo[256];
 101
 102         pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo));
 103         printf(": %s (rev. 0x%02x)\n", devinfo, PCI_REVISION(pa->pa_class));
 104
 105         io_valid = (pci_mapreg_map(pa, PCI_IO_MAP_REG, PCI_MAPREG_TYPE_IO,
 106                         0, &iot, &ioh, NULL, NULL) == 0);
 107         mem_valid = (pci_mapreg_map(pa, PCI_MEM_MAP_REG, PCI_MAPREG_TYPE_MEM
 108                         | PCI_MAPREG_MEM_TYPE_32BIT, 0, &memt, &memh,
 109                         NULL, NULL) == 0);
 110
 111         if (mem_valid) {
 112                 sc->bus_tag = memt;
 113                 sc->bus_handle = memh;
 114         } else if (io_valid) {
 115                 sc->bus_tag = iot;
 116                 sc->bus_handle = ioh;
 117         } else {
 118                 aprint_error_dev(&sc->dev, "could not map memory or i/o space\n");
 119                 return;
 120         }
 121         sc->dma_tag = pa->pa_dmat;
 122
 123         /* Do generic attach. Seems this must be done before setting IRQ */
 124         mtd_config(sc);
 125
 126         if (pci_intr_map(pa, &ih)) {
 127                 aprint_error_dev(&sc->dev, "could not map interrupt\n");
 128                 return;
 129         }
 130         intrstring = pci_intr_string(pa->pa_pc, ih);
 131
 132         if (pci_intr_establish(pa->pa_pc, ih, IPL_NET, mtd_irq_h, sc) == NULL) {
 133                 aprint_error_dev(&sc->dev, "could not establish interrupt");
 134                 if (intrstring != NULL)
 135                         aprint_error(" at %s", intrstring);
 136                 aprint_error("\n");
 137                 return;
 138         } else {
 139                 aprint_normal_dev(&sc->dev, "using %s for interrupt\n",
 140                         intrstring ? intrstring : "unknown interrupt");
 141         }
 142 }