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tsp_pci.c revision 1.5 
      1 /* $NetBSD: tsp_pci.c,v 1.5 2009/03/14 15:36:00 dsl 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: tsp_pci.c,v 1.5 2009/03/14 15:36:00 dsl Exp $");
     37 
     38 #include <sys/param.h>
     39 #include <sys/systm.h>
     40 #include <sys/kernel.h>
     41 #include <sys/device.h>
     42 
     43 #include <uvm/uvm_extern.h>
     44 
     45 #include <dev/pci/pcireg.h>
     46 #include <dev/pci/pcivar.h>
     47 
     48 #include <machine/autoconf.h>
     49 #include <machine/rpb.h>
     50 
     51 #include <alpha/pci/tsreg.h>
     52 #include <alpha/pci/tsvar.h>
     53 
     54 #define tsp_pci() { Generate ctags(1) key. }
     55 
     56 void		tsp_attach_hook(struct device *, struct device *,
     57 		    struct pcibus_attach_args *);
     58 int		tsp_bus_maxdevs(void *, int);
     59 pcitag_t	tsp_make_tag(void *, int, int, int);
     60 void		tsp_decompose_tag(void *, pcitag_t, int *, int *,
     61 		    int *);
     62 pcireg_t	tsp_conf_read(void *, pcitag_t, int);
     63 void		tsp_conf_write(void *, pcitag_t, int, pcireg_t);
     64 
     65 void
     66 tsp_pci_init(pci_chipset_tag_t pc, 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(void *cpv, int busno)
     86 {
     87 	return 32;
     88 }
     89 
     90 pcitag_t
     91 tsp_make_tag(cpv, b, d, f)
     92 	void *cpv;
     93 	int b, d, f;
     94 {
     95 	return b << 16 | d << 11 | f << 8;
     96 }
     97 
     98 void
     99 tsp_decompose_tag(cpv, tag, bp, dp, fp)
    100 	void *cpv;
    101 	pcitag_t tag;
    102 	int *bp, *dp, *fp;
    103 {
    104 	if (bp != NULL)
    105 		*bp = (tag >> 16) & 0xff;
    106 	if (dp != NULL)
    107 		*dp = (tag >> 11) & 0x1f;
    108 	if (fp != NULL)
    109 		*fp = (tag >> 8) & 0x7;
    110 }
    111 /*
    112  * Tsunami makes this a lot easier than it used to be, automatically
    113  * generating type 0 or type 1 cycles, and quietly returning -1 with
    114  * no errors on unanswered probes.
    115  */
    116 pcireg_t
    117 tsp_conf_read(void *cpv, pcitag_t tag, int offset)
    118 {
    119 	pcireg_t *datap, data;
    120 	struct tsp_config *pcp = cpv;
    121 
    122 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
    123 	alpha_mb();
    124 	data = *datap;
    125 	alpha_mb();
    126 	return data;
    127 }
    128 
    129 void
    130 tsp_conf_write(void *cpv, pcitag_t tag, int offset, pcireg_t data)
    131 {
    132 	pcireg_t *datap;
    133 	struct tsp_config *pcp = cpv;
    134 
    135 	datap = S_PAGE(pcp->pc_iobase | P_PCI_CONFIG | tag | (offset & ~3));
    136 	alpha_mb();
    137 	*datap = data;
    138 	alpha_mb();
    139 }
    140