amdpm.c revision 1.22
1 /* $NetBSD: amdpm.c,v 1.22 2007/01/06 00:14:21 jmcneill Exp $ */ 2 3 /*- 4 * Copyright (c) 2002 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Enami Tsugutomo. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 #include <sys/cdefs.h> 40 __KERNEL_RCSID(0, "$NetBSD: amdpm.c,v 1.22 2007/01/06 00:14:21 jmcneill Exp $"); 41 42 #include "opt_amdpm.h" 43 44 #include <sys/param.h> 45 #include <sys/systm.h> 46 #include <sys/kernel.h> 47 #include <sys/device.h> 48 #include <sys/callout.h> 49 #include <sys/rnd.h> 50 51 #ifdef __HAVE_TIMECOUNTER 52 #include <machine/bus.h> 53 #include <dev/ic/acpipmtimer.h> 54 #endif 55 56 #include <dev/i2c/i2cvar.h> 57 58 #include <dev/pci/pcivar.h> 59 #include <dev/pci/pcireg.h> 60 #include <dev/pci/pcidevs.h> 61 62 #include <dev/pci/amdpmreg.h> 63 #include <dev/pci/amdpmvar.h> 64 #include <dev/pci/amdpm_smbusreg.h> 65 66 static void amdpm_rnd_callout(void *); 67 68 #ifdef AMDPM_RND_COUNTERS 69 #define AMDPM_RNDCNT_INCR(ev) (ev)->ev_count++ 70 #endif 71 72 static int 73 amdpm_match(struct device *parent, struct cfdata *match, 74 void *aux) 75 { 76 struct pci_attach_args *pa = aux; 77 78 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD) { 79 switch (PCI_PRODUCT(pa->pa_id)) { 80 case PCI_PRODUCT_AMD_PBC768_PMC: 81 case PCI_PRODUCT_AMD_PBC8111_ACPI: 82 return (1); 83 } 84 } 85 if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { 86 switch (PCI_PRODUCT(pa->pa_id)) { 87 case PCI_PRODUCT_NVIDIA_XBOX_SMBUS: 88 return (1); 89 } 90 } 91 92 return (0); 93 } 94 95 static void 96 amdpm_attach(struct device *parent, struct device *self, void *aux) 97 { 98 struct amdpm_softc *sc = (struct amdpm_softc *) self; 99 struct pci_attach_args *pa = aux; 100 char devinfo[256]; 101 pcireg_t confreg, pmptrreg; 102 u_int32_t pmreg; 103 int i; 104 105 aprint_naive("\n"); 106 pci_devinfo(pa->pa_id, pa->pa_class, 0, devinfo, sizeof(devinfo)); 107 aprint_normal(": %s (rev. 0x%02x)\n", devinfo, 108 PCI_REVISION(pa->pa_class)); 109 110 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NVIDIA_XBOX_SMBUS) 111 sc->sc_nforce = 1; 112 else 113 sc->sc_nforce = 0; 114 115 sc->sc_pc = pa->pa_pc; 116 sc->sc_tag = pa->pa_tag; 117 sc->sc_iot = pa->pa_iot; 118 119 #if 0 120 aprint_normal("%s: ", sc->sc_dev.dv_xname); 121 pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); 122 #endif 123 124 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 125 /* enable pm i/o space for AMD-8111 and nForce */ 126 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 127 sc->sc_nforce) 128 confreg |= AMDPM_PMIOEN; 129 130 /* Enable random number generation for everyone */ 131 pci_conf_write(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG, 132 confreg | AMDPM_RNGEN); 133 confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); 134 135 if ((confreg & AMDPM_PMIOEN) == 0) { 136 aprint_error("%s: PMxx space isn't enabled\n", 137 sc->sc_dev.dv_xname); 138 return; 139 } 140 141 if (sc->sc_nforce) { 142 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_PMPTR); 143 if (bus_space_map(sc->sc_iot, NFORCE_PMBASE(pmptrreg), 144 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 145 aprint_error("%s: failed to map PMxx space\n", 146 sc->sc_dev.dv_xname); 147 return; 148 } 149 } else { 150 pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR); 151 if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(pmptrreg), 152 AMDPM_PMSIZE, 0, &sc->sc_ioh)) { 153 aprint_error("%s: failed to map PMxx space\n", 154 sc->sc_dev.dv_xname); 155 return; 156 } 157 } 158 159 #ifdef __HAVE_TIMECOUNTER 160 if ((confreg & AMDPM_TMRRST) == 0 && (confreg & AMDPM_STOPTMR) == 0) { 161 acpipmtimer_attach(&sc->sc_dev, sc->sc_iot, sc->sc_ioh, 162 AMDPM_TMR, ((confreg & AMDPM_TMR32) ? ACPIPMT_32BIT : 0)); 163 } 164 #endif 165 166 /* try to attach devices on the smbus */ 167 if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || 168 sc->sc_nforce) 169 amdpm_smbus_attach(sc); 170 171 if (confreg & AMDPM_RNGEN) { 172 /* Check to see if we can read data from the RNG. */ 173 (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, 174 AMDPM_RNGDATA); 175 for (i = 0; i < 1000; i++) { 176 pmreg = bus_space_read_4(sc->sc_iot, 177 sc->sc_ioh, AMDPM_RNGSTAT); 178 if (pmreg & AMDPM_RNGDONE) 179 break; 180 delay(1); 181 } 182 if ((pmreg & AMDPM_RNGDONE) != 0) { 183 aprint_normal("%s: " 184 "random number generator enabled (apprx. %dms)\n", 185 sc->sc_dev.dv_xname, i); 186 callout_init(&sc->sc_rnd_ch); 187 rnd_attach_source(&sc->sc_rnd_source, 188 sc->sc_dev.dv_xname, RND_TYPE_RNG, 189 /* 190 * XXX Careful! The use of RND_FLAG_NO_ESTIMATE 191 * XXX here is unobvious: we later feed raw bits 192 * XXX into the "entropy pool" with rnd_add_data, 193 * XXX explicitly supplying an entropy estimate. 194 * XXX In this context, NO_ESTIMATE serves only 195 * XXX to prevent rnd_add_data from trying to 196 * XXX use the *time at which we added the data* 197 * XXX as entropy, which is not a good idea since 198 * XXX we add data periodically from a callout. 199 */ 200 RND_FLAG_NO_ESTIMATE); 201 #ifdef AMDPM_RND_COUNTERS 202 evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC, 203 NULL, sc->sc_dev.dv_xname, "rnd hits"); 204 evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC, 205 NULL, sc->sc_dev.dv_xname, "rnd miss"); 206 for (i = 0; i < 256; i++) { 207 evcnt_attach_dynamic(&sc->sc_rnd_data[i], 208 EVCNT_TYPE_MISC, NULL, sc->sc_dev.dv_xname, 209 "rnd data"); 210 } 211 #endif 212 amdpm_rnd_callout(sc); 213 } 214 } 215 } 216 217 CFATTACH_DECL(amdpm, sizeof(struct amdpm_softc), 218 amdpm_match, amdpm_attach, NULL, NULL); 219 220 static void 221 amdpm_rnd_callout(void *v) 222 { 223 struct amdpm_softc *sc = v; 224 u_int32_t rngreg; 225 #ifdef AMDPM_RND_COUNTERS 226 int i; 227 #endif 228 229 if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & 230 AMDPM_RNGDONE) != 0) { 231 rngreg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, 232 AMDPM_RNGDATA); 233 rnd_add_data(&sc->sc_rnd_source, &rngreg, 234 sizeof(rngreg), sizeof(rngreg) * NBBY); 235 #ifdef AMDPM_RND_COUNTERS 236 AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits); 237 for (i = 0; i < sizeof(rngreg); i++, rngreg >>= NBBY) 238 AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[rngreg & 0xff]); 239 #endif 240 } 241 #ifdef AMDPM_RND_COUNTERS 242 else 243 AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss); 244 #endif 245 callout_reset(&sc->sc_rnd_ch, 1, amdpm_rnd_callout, sc); 246 } 247
Indexes created Wed Oct 01 07:09:59 GMT 2025