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tsp_pci.c revision 1.1.4.2 
      1 /* $NetBSD: tsp_pci.c,v 1.1.4.2 1999/06/29 06:46:48 ross Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 1999 by Ross Harvey.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *	This product includes software developed by Ross Harvey.
     17  * 4. The name of Ross Harvey may not be used to endorse or promote products
     18  *    derived from this software without specific prior written permission.
     19  *
     20  * THIS SOFTWARE IS PROVIDED BY ROSS HARVEY ``AS IS'' AND ANY EXPRESS
     21  * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
     22  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURP0SE
     23  * ARE DISCLAIMED.  IN NO EVENT SHALL ROSS HARVEY BE LIABLE FOR ANY
     24  * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     25  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     26  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     27  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     28  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     29  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     30  * SUCH DAMAGE.
     31  *
     32  */
     33 
     34 #include <sys/cdefs.h>
     35 
     36 __KERNEL_RCSID(0, "$NetBSD");
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/kernel.h>
     41 #include <sys/device.h>
     42 #include <vm/vm.h>
     43 #include <dev/pci/pcireg.h>
     44 #include <dev/pci/pcivar.h>
     45 
     46 #include <machine/autoconf.h>
     47 #include <machine/rpb.h>
     48 
     49 #include <alpha/pci/tsreg.h>
     50 #include <alpha/pci/tsvar.h>
     51 
     52 #define tsp_pci() { Generate ctags(1) key. }
     53 
     54 void		tsp_attach_hook __P((struct device *, struct device *,
     55 		    struct pcibus_attach_args *));
     56 int		tsp_bus_maxdevs __P((void *, int));
     57 pcitag_t	tsp_make_tag __P((void *, int, int, int));
     58 void		tsp_decompose_tag __P((void *, pcitag_t, int *, int *,
     59 		    int *));
     60 pcireg_t	tsp_conf_read __P((void *, pcitag_t, int));
     61 void		tsp_conf_write __P((void *, pcitag_t, int, pcireg_t));
     62 
     63 void
     64 tsp_pci_init(pc, v)
     65 	pci_chipset_tag_t pc;
     66 	void *v;
     67 {
     68 	pc->pc_conf_v = v;
     69 	pc->pc_attach_hook = tsp_attach_hook;
     70 	pc->pc_bus_maxdevs = tsp_bus_maxdevs;
     71 	pc->pc_make_tag = tsp_make_tag;
     72 	pc->pc_decompose_tag = tsp_decompose_tag;
     73 	pc->pc_conf_read = tsp_conf_read;
     74 	pc->pc_conf_write = tsp_conf_write;
     75 }
     76 
     77 void
     78 tsp_attach_hook(parent, self, pba)
     79 	struct device *parent, *self;
     80 	struct pcibus_attach_args *pba;
     81 {
     82 }
     83 
     84 int
     85 tsp_bus_maxdevs(cpv, busno)
     86 	void *cpv;
     87 	int busno;
     88 {
     89 	return 32;
     90 }
     91 
     92 pcitag_t
     93 tsp_make_tag(cpv, b, d, f)
     94 	void *cpv;
     95 	int b, d, f;
     96 {
     97 	return b << 16 | d << 11 | f << 8;
     98 }
     99 
    100 void
    101 tsp_decompose_tag(cpv, tag, bp, dp, fp)
    102 	void *cpv;
    103 	pcitag_t tag;
    104 	int *bp, *dp, *fp;
    105 {
    106 	if (bp != NULL)
    107 		*bp = (tag >> 16) & 0xff;
    108 	if (dp != NULL)
    109 		*dp = (tag >> 11) & 0x1f;
    110 	if (fp != NULL)
    111 		*fp = (tag >> 8) & 0x7;
    112 }
    113 /*
    114  * Tsunami makes this a lot easier than it used to be, automatically
    115  * generating type 0 or type 1 cycles, and quietly returning -1 with
    116  * no errors on unanswered probes.
    117  */
    118 pcireg_t
    119 tsp_conf_read(cpv, tag, offset)
    120 	void *cpv;
    121 	pcitag_t tag;
    122 	int offset;
    123 {
    124 	pcireg_t *datap, data;
    125 	struct tsp_config *pcp = cpv;
    126 
    127 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
    128 	alpha_mb();
    129 	data = *datap;
    130 	alpha_mb();
    131 	return data;
    132 }
    133 
    134 void
    135 tsp_conf_write(cpv, tag, offset, data)
    136 	void *cpv;
    137 	pcitag_t tag;
    138 	int offset;
    139 	pcireg_t data;
    140 {
    141 	pcireg_t *datap;
    142 	struct tsp_config *pcp = cpv;
    143 
    144 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
    145 	alpha_mb();
    146 	*datap = data;
    147 	alpha_mb();
    148 }
    149