1/* $NetBSD: tpm_isa.c,v 1.2 2012/02/06 04:29:47 christos Exp $ */
2
3/*
4 * Copyright (c) 2008, 2009 Michael Shalayeff
5 * Copyright (c) 2009, 2010 Hans-Jörg Höxer
6 * All rights reserved.
7 *
8 * Permission to use, copy, modify, and distribute this software for any
9 * purpose with or without fee is hereby granted, provided that the above
10 * copyright notice and this permission notice appear in all copies.
11 *
12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
16 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER IN
17 * AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT
18 * OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
19 */
20
21#include <sys/cdefs.h>
22__KERNEL_RCSID(0, "$NetBSD: tpm_isa.c,v 1.2 2012/02/06 04:29:47 christos Exp $");
23
24#include <sys/param.h>
25#include <sys/systm.h>
26#include <sys/kernel.h>
27#include <sys/malloc.h>
28#include <sys/proc.h>
29#include <sys/device.h>
30#include <sys/bus.h>
31#include <sys/pmf.h>
32
33#include <dev/ic/tpmreg.h>
34#include <dev/ic/tpmvar.h>
35
36#include <dev/isa/isareg.h>
37#include <dev/isa/isavar.h>
38
39static int tpm_isa_match(device_t, cfdata_t, void *);
40static void tpm_isa_attach(device_t, device_t, void *);
41
42CFATTACH_DECL_NEW(tpm_isa, sizeof(struct tpm_softc),
43 tpm_isa_match, tpm_isa_attach, NULL, NULL);
44
45extern struct cfdriver tpm_cd;
46
47static int
48tpm_isa_match(device_t parent, cfdata_t match, void *aux)
49{
50 struct isa_attach_args *ia = aux;
51 bus_space_tag_t bt = ia->ia_memt;
52 bus_space_handle_t bh;
53 int rv;
54
55 /* There can be only one. */
56 if (tpm_cd.cd_devs && tpm_cd.cd_devs[0])
57 return 0;
58
59 if (tpm_legacy_probe(ia->ia_iot, ia->ia_io[0].ir_addr)) {
60 ia->ia_io[0].ir_size = 2;
61 return 1;
62 }
63
64 if (ia->ia_iomem[0].ir_addr == ISA_UNKNOWN_IOMEM)
65 return 0;
66
67 /* XXX: integer locator sign extension */
68 if (bus_space_map(bt, (unsigned int)ia->ia_iomem[0].ir_addr, TPM_SIZE,
69 0, &bh))
70 return 0;
71
72 if ((rv = tpm_tis12_probe(bt, bh))) {
73 ia->ia_nio = 0;
74 ia->ia_io[0].ir_size = 0;
75 ia->ia_iomem[0].ir_size = TPM_SIZE;
76 }
77 ia->ia_ndrq = 0;
78
79 bus_space_unmap(bt, bh, TPM_SIZE);
80 return rv;
81}
82
83static void
84tpm_isa_attach(device_t parent, device_t self, void *aux)
85{
86 struct tpm_softc *sc = device_private(self);
87 struct isa_attach_args *ia = aux;
88 bus_addr_t iobase;
89 bus_size_t size;
90 int rv;
91
92 sc->sc_dev = self;
93
94 if (tpm_legacy_probe(ia->ia_iot, ia->ia_io[0].ir_addr)) {
95 sc->sc_bt = ia->ia_iot;
96 iobase = (unsigned int)ia->ia_io[0].ir_addr;
97 size = ia->ia_io[0].ir_size;
98 sc->sc_batm = ia->ia_iot;
99 sc->sc_init = tpm_legacy_init;
100 sc->sc_start = tpm_legacy_start;
101 sc->sc_read = tpm_legacy_read;
102 sc->sc_write = tpm_legacy_write;
103 sc->sc_end = tpm_legacy_end;
104 } else {
105 sc->sc_bt = ia->ia_memt;
106 iobase = (unsigned int)ia->ia_iomem[0].ir_addr;
107 size = TPM_SIZE;
108 sc->sc_init = tpm_tis12_init;
109 sc->sc_start = tpm_tis12_start;
110 sc->sc_read = tpm_tis12_read;
111 sc->sc_write = tpm_tis12_write;
112 sc->sc_end = tpm_tis12_end;
113 }
114
115 if (bus_space_map(sc->sc_bt, iobase, size, 0, &sc->sc_bh)) {
116 aprint_error_dev(sc->sc_dev, "cannot map registers\n");
117 return;
118 }
119
120 if ((rv = (*sc->sc_init)(sc, ia->ia_irq[0].ir_irq,
121 device_xname(sc->sc_dev))) != 0) {
122 bus_space_unmap(sc->sc_bt, sc->sc_bh, size);
123 return;
124 }
125
126 /*
127 * Only setup interrupt handler when we have a vector and the
128 * chip is TIS 1.2 compliant.
129 */
130 if (sc->sc_init == tpm_tis12_init &&
131 ia->ia_irq[0].ir_irq != ISA_UNKNOWN_IRQ &&
132 (sc->sc_ih = isa_intr_establish(ia->ia_ic, ia->ia_irq[0].ir_irq,
133 IST_EDGE, IPL_TTY, tpm_intr, sc)) == NULL) {
134 bus_space_unmap(sc->sc_bt, sc->sc_bh, TPM_SIZE);
135 aprint_error_dev(sc->sc_dev, "cannot establish interrupt\n");
136 return;
137 }
138
139 if (!pmf_device_register(sc->sc_dev, tpm_suspend, tpm_resume))
140 aprint_error_dev(sc->sc_dev, "Cannot set power mgmt handler\n");
141}
142