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uni-n.c revision 1.5 
      1 /*	$NetBSD: uni-n.c,v 1.5 2011/06/18 08:08:28 matt Exp $	*/
      2 
      3 /*-
      4  * Copyright (C) 2005 Michael Lorenz.
      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. The name of the author may not be used to endorse or promote products
     15  *    derived from this software without specific prior written permission.
     16  *
     17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
     26  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     27  */
     28 
     29 /*
     30  * a driver to match the uni_n node in OF's device tree and attach its children
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: uni-n.c,v 1.5 2011/06/18 08:08:28 matt Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/kernel.h>
     39 #include <sys/device.h>
     40 
     41 #include <dev/ofw/openfirm.h>
     42 
     43 #include <machine/autoconf.h>
     44 
     45 static void uni_n_attach(device_t, device_t, void *);
     46 static int uni_n_match(device_t, cfdata_t, void *);
     47 static int uni_n_print(void *, const char *);
     48 
     49 struct uni_n_softc {
     50 	struct device sc_dev;
     51 	int sc_node;
     52 };
     53 
     54 CFATTACH_DECL(uni_n, sizeof(struct uni_n_softc),
     55     uni_n_match, uni_n_attach, NULL, NULL);
     56 
     57 int
     58 uni_n_match(device_t parent, cfdata_t cf, void *aux)
     59 {
     60 	struct confargs *ca = aux;
     61 	char compat[32];
     62 	if (strcmp(ca->ca_name, "uni-n") != 0)
     63 		return 0;
     64 
     65 	memset(compat, 0, sizeof(compat));
     66 	OF_getprop(ca->ca_node, "compatible", compat, sizeof(compat));
     67 	if (strcmp(compat, "uni-north") != 0)
     68 		return 0;
     69 
     70 	return 1;
     71 }
     72 
     73 /*
     74  * Attach all the sub-devices we can find
     75  */
     76 void
     77 uni_n_attach(device_t parent, device_t self, void *aux)
     78 {
     79 	struct uni_n_softc *sc = device_private(self);
     80 	struct confargs *our_ca = aux;
     81 	struct confargs ca;
     82 	int node, child, namelen;
     83 	u_int reg[20];
     84 	int intr[6];
     85 	char name[32];
     86 
     87 	node = OF_finddevice("/uni-n");
     88 	sc->sc_node = node;
     89 	printf(" address 0x%08x\n",our_ca->ca_reg[0]);
     90 
     91 	for (child = OF_child(node); child; child = OF_peer(child)) {
     92 		namelen = OF_getprop(child, "name", name, sizeof(name));
     93 		if (namelen < 0)
     94 			continue;
     95 		if (namelen >= sizeof(name))
     96 			continue;
     97 
     98 		name[namelen] = 0;
     99 		ca.ca_name = name;
    100 		ca.ca_node = child;
    101 
    102 		ca.ca_nreg  = OF_getprop(child, "reg", reg, sizeof(reg));
    103 		ca.ca_nintr = OF_getprop(child, "AAPL,interrupts", intr,
    104 				sizeof(intr));
    105 		if (ca.ca_nintr == -1)
    106 			ca.ca_nintr = OF_getprop(child, "interrupts", intr,
    107 					sizeof(intr));
    108 
    109 		ca.ca_reg = reg;
    110 		ca.ca_intr = intr;
    111 
    112 		config_found(self, &ca, uni_n_print);
    113 	}
    114 }
    115 
    116 int
    117 uni_n_print(void *aux, const char *uni_n)
    118 {
    119 	struct confargs *ca = aux;
    120 	if (uni_n)
    121 		aprint_normal("%s at %s", ca->ca_name, uni_n);
    122 
    123 	if (ca->ca_nreg > 0)
    124 		aprint_normal(" address 0x%x", ca->ca_reg[0]);
    125 
    126 	return UNCONF;
    127 }
    128