Annotation of sys/dev/pci/iop_pci.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: iop_pci.c,v 1.5 2005/08/09 04:10:12 mickey Exp $ */
2: /* $NetBSD: iop_pci.c,v 1.4 2001/03/20 13:21:00 ad Exp $ */
3:
4: /*-
5: * Copyright (c) 2000 The NetBSD Foundation, Inc.
6: * All rights reserved.
7: *
8: * This code is derived from software contributed to The NetBSD Foundation
9: * by Andrew Doran.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the NetBSD
22: * Foundation, Inc. and its contributors.
23: * 4. Neither the name of The NetBSD Foundation nor the names of its
24: * contributors may be used to endorse or promote products derived
25: * from this software without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
28: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
29: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
30: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
31: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
32: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
33: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
34: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
35: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
36: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
37: * POSSIBILITY OF SUCH DAMAGE.
38: */
39:
40: /*
41: * PCI front-end for `iop' driver.
42: */
43:
44: #include <sys/param.h>
45: #include <sys/systm.h>
46: #include <sys/kernel.h>
47: #include <sys/device.h>
48: #include <sys/queue.h>
49: #include <sys/proc.h>
50:
51: #include <machine/endian.h>
52: #include <machine/bus.h>
53:
54: #include <dev/pci/pcidevs.h>
55: #include <dev/pci/pcivar.h>
56:
57: #include <dev/i2o/i2o.h>
58: #include <dev/i2o/iopreg.h>
59: #include <dev/i2o/iopio.h>
60: #include <dev/i2o/iopvar.h>
61:
62: #define PCI_INTERFACE_I2O_POLLED 0x00
63: #define PCI_INTERFACE_I2O_INTRDRIVEN 0x01
64:
65: void iop_pci_attach(struct device *, struct device *, void *);
66: int iop_pci_match(struct device *, void *, void *);
67:
68: struct cfattach iop_pci_ca = {
69: sizeof(struct iop_softc), iop_pci_match, iop_pci_attach
70: };
71:
72: int
73: iop_pci_match(parent, match, aux)
74: struct device *parent;
75: void *match;
76: void *aux;
77: {
78: struct pci_attach_args *pa;
79:
80: pa = aux;
81:
82: /*
83: * Look for an "intelligent I/O processor" that adheres to the I2O
84: * specification. Ignore the device if it doesn't support interrupt
85: * driven operation.
86: */
87: if (PCI_CLASS(pa->pa_class) == PCI_CLASS_I2O &&
88: PCI_SUBCLASS(pa->pa_class) == PCI_SUBCLASS_I2O_STANDARD &&
89: PCI_INTERFACE(pa->pa_class) == PCI_INTERFACE_I2O_INTRDRIVEN)
90: return (1);
91:
92: return (0);
93: }
94:
95: void
96: iop_pci_attach(struct device *parent, struct device *self, void *aux)
97: {
98: struct pci_attach_args *pa;
99: struct iop_softc *sc;
100: pci_chipset_tag_t pc;
101: pci_intr_handle_t ih;
102: const char *intrstr;
103: pcireg_t reg;
104: int i;
105:
106: sc = (struct iop_softc *)self;
107: pa = (struct pci_attach_args *)aux;
108: pc = pa->pa_pc;
109: printf(": ");
110:
111: /*
112: * The kernel always uses the first memory mapping to communicate
113: * with the IOP.
114: */
115: for (i = PCI_MAPREG_START; i < PCI_MAPREG_END; i += 4) {
116: reg = pci_conf_read(pc, pa->pa_tag, i);
117: if (PCI_MAPREG_TYPE(reg) == PCI_MAPREG_TYPE_MEM)
118: break;
119: }
120: if (i == PCI_MAPREG_END) {
121: printf("can't find mapping\n");
122: return;
123: }
124:
125: /* Map the register window. */
126: if (pci_mapreg_map(pa, i, PCI_MAPREG_TYPE_MEM, 0, &sc->sc_iot,
127: &sc->sc_ioh, NULL, NULL, 0x40000)) {
128: printf("%s: can't map register window\n", sc->sc_dv.dv_xname);
129: return;
130: }
131:
132: sc->sc_dmat = pa->pa_dmat;
133: sc->sc_bus_memt = pa->pa_memt;
134: sc->sc_bus_iot = pa->pa_iot;
135:
136: /* Map and establish the interrupt. XXX IPL_BIO. */
137: if (pci_intr_map(pa, &ih)) {
138: printf("can't map interrupt\n");
139: return;
140: }
141: intrstr = pci_intr_string(pc, ih);
142: sc->sc_ih = pci_intr_establish(pc, ih, IPL_BIO, iop_intr, sc,
143: sc->sc_dv.dv_xname);
144: if (sc->sc_ih == NULL) {
145: printf("can't establish interrupt");
146: if (intrstr != NULL)
147: printf(" at %s", intrstr);
148: printf("\n");
149: return;
150: }
151:
152: /* Attach to the bus-independent code. */
153: iop_init(sc, intrstr);
154: }
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