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 | |
39 | static int tpm_isa_match(device_t, cfdata_t, void *); |
40 | static void tpm_isa_attach(device_t, device_t, void *); |
41 | |
42 | CFATTACH_DECL_NEW(tpm_isa, sizeof(struct tpm_softc), |
43 | tpm_isa_match, tpm_isa_attach, NULL, NULL); |
44 | |
45 | extern struct cfdriver tpm_cd; |
46 | |
47 | static int |
48 | tpm_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 | |
83 | static void |
84 | tpm_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 | |