| 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 | |