| 1 | /* $NetBSD: amdpm.c,v 1.39 2015/04/13 16:33:25 riastradh 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 | * |
| 19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
| 20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
| 21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
| 22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
| 23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
| 24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
| 25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
| 26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
| 27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| 28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 29 | * POSSIBILITY OF SUCH DAMAGE. |
| 30 | */ |
| 31 | |
| 32 | #include <sys/cdefs.h> |
| 33 | __KERNEL_RCSID(0, "$NetBSD: amdpm.c,v 1.39 2015/04/13 16:33:25 riastradh Exp $" ); |
| 34 | |
| 35 | #include "opt_amdpm.h" |
| 36 | |
| 37 | #include <sys/param.h> |
| 38 | #include <sys/systm.h> |
| 39 | #include <sys/kernel.h> |
| 40 | #include <sys/device.h> |
| 41 | #include <sys/callout.h> |
| 42 | #include <sys/rndpool.h> |
| 43 | #include <sys/rndsource.h> |
| 44 | #include <sys/mutex.h> |
| 45 | |
| 46 | #include <sys/bus.h> |
| 47 | #include <dev/ic/acpipmtimer.h> |
| 48 | |
| 49 | #include <dev/i2c/i2cvar.h> |
| 50 | |
| 51 | #include <dev/pci/pcivar.h> |
| 52 | #include <dev/pci/pcireg.h> |
| 53 | #include <dev/pci/pcidevs.h> |
| 54 | |
| 55 | #include <dev/pci/amdpmreg.h> |
| 56 | #include <dev/pci/amdpmvar.h> |
| 57 | #include <dev/pci/amdpm_smbusreg.h> |
| 58 | |
| 59 | static void amdpm_rnd_callout(void *); |
| 60 | static void amdpm_rnd_callout_locked(void *); |
| 61 | |
| 62 | #ifdef AMDPM_RND_COUNTERS |
| 63 | #define AMDPM_RNDCNT_INCR(ev) (ev)->ev_count++ |
| 64 | #endif |
| 65 | |
| 66 | static int |
| 67 | amdpm_match(device_t parent, cfdata_t match, void *aux) |
| 68 | { |
| 69 | struct pci_attach_args *pa = aux; |
| 70 | |
| 71 | if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_AMD) { |
| 72 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 73 | case PCI_PRODUCT_AMD_PBC768_PMC: |
| 74 | case PCI_PRODUCT_AMD_PBC8111_ACPI: |
| 75 | return (1); |
| 76 | } |
| 77 | } |
| 78 | if (PCI_VENDOR(pa->pa_id) == PCI_VENDOR_NVIDIA) { |
| 79 | switch (PCI_PRODUCT(pa->pa_id)) { |
| 80 | case PCI_PRODUCT_NVIDIA_XBOX_SMBUS: |
| 81 | return (1); |
| 82 | } |
| 83 | } |
| 84 | |
| 85 | return (0); |
| 86 | } |
| 87 | |
| 88 | static void |
| 89 | amdpm_rnd_get(size_t bytes, void *priv) |
| 90 | { |
| 91 | struct amdpm_softc *sc = priv; |
| 92 | |
| 93 | mutex_enter(&sc->sc_mutex); |
| 94 | sc->sc_rnd_need = bytes; |
| 95 | amdpm_rnd_callout_locked(sc); |
| 96 | mutex_exit(&sc->sc_mutex); |
| 97 | } |
| 98 | |
| 99 | static void |
| 100 | amdpm_attach(device_t parent, device_t self, void *aux) |
| 101 | { |
| 102 | struct amdpm_softc *sc = device_private(self); |
| 103 | struct pci_attach_args *pa = aux; |
| 104 | pcireg_t confreg, pmptrreg; |
| 105 | u_int32_t pmreg; |
| 106 | int i; |
| 107 | |
| 108 | pci_aprint_devinfo(pa, NULL); |
| 109 | |
| 110 | sc->sc_dev = self; |
| 111 | |
| 112 | if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_NVIDIA_XBOX_SMBUS) |
| 113 | sc->sc_nforce = 1; |
| 114 | else |
| 115 | sc->sc_nforce = 0; |
| 116 | |
| 117 | sc->sc_pc = pa->pa_pc; |
| 118 | sc->sc_tag = pa->pa_tag; |
| 119 | sc->sc_iot = pa->pa_iot; |
| 120 | sc->sc_pa = pa; |
| 121 | |
| 122 | #if 0 |
| 123 | aprint_normal_dev(self, "" ); |
| 124 | pci_conf_print(pa->pa_pc, pa->pa_tag, NULL); |
| 125 | #endif |
| 126 | |
| 127 | confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); |
| 128 | /* enable pm i/o space for AMD-8111 and nForce */ |
| 129 | if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || |
| 130 | sc->sc_nforce) |
| 131 | confreg |= AMDPM_PMIOEN; |
| 132 | |
| 133 | /* Enable random number generation for everyone */ |
| 134 | pci_conf_write(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG, |
| 135 | confreg | AMDPM_RNGEN); |
| 136 | confreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_CONFREG); |
| 137 | |
| 138 | if ((confreg & AMDPM_PMIOEN) == 0) { |
| 139 | aprint_error_dev(self, "PMxx space isn't enabled\n" ); |
| 140 | return; |
| 141 | } |
| 142 | |
| 143 | if (sc->sc_nforce) { |
| 144 | pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, NFORCE_PMPTR); |
| 145 | aprint_normal_dev(self, "power management at 0x%04x\n" , |
| 146 | NFORCE_PMBASE(pmptrreg)); |
| 147 | if (bus_space_map(sc->sc_iot, NFORCE_PMBASE(pmptrreg), |
| 148 | AMDPM_PMSIZE, 0, &sc->sc_ioh)) { |
| 149 | aprint_error_dev(self, "failed to map PMxx space\n" ); |
| 150 | return; |
| 151 | } |
| 152 | } else { |
| 153 | pmptrreg = pci_conf_read(pa->pa_pc, pa->pa_tag, AMDPM_PMPTR); |
| 154 | if (bus_space_map(sc->sc_iot, AMDPM_PMBASE(pmptrreg), |
| 155 | AMDPM_PMSIZE, 0, &sc->sc_ioh)) { |
| 156 | aprint_error_dev(self, "failed to map PMxx space\n" ); |
| 157 | return; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | /* don't attach a timecounter on nforce boards */ |
| 162 | if ((confreg & AMDPM_TMRRST) == 0 && (confreg & AMDPM_STOPTMR) == 0 && |
| 163 | !sc->sc_nforce) { |
| 164 | acpipmtimer_attach(self, sc->sc_iot, sc->sc_ioh, |
| 165 | AMDPM_TMR, ((confreg & AMDPM_TMR32) ? ACPIPMT_32BIT : 0)); |
| 166 | } |
| 167 | |
| 168 | /* XXX this mutex is IPL_VM because it can be taken by rnd_getmore() */ |
| 169 | mutex_init(&sc->sc_mutex, MUTEX_DEFAULT, IPL_VM); |
| 170 | |
| 171 | /* try to attach devices on the smbus */ |
| 172 | if (PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC8111_ACPI || |
| 173 | PCI_PRODUCT(pa->pa_id) == PCI_PRODUCT_AMD_PBC768_PMC || |
| 174 | sc->sc_nforce) { |
| 175 | amdpm_smbus_attach(sc); |
| 176 | } |
| 177 | |
| 178 | if (confreg & AMDPM_RNGEN) { |
| 179 | /* Check to see if we can read data from the RNG. */ |
| 180 | (void) bus_space_read_4(sc->sc_iot, sc->sc_ioh, |
| 181 | AMDPM_RNGDATA); |
| 182 | for (i = 0; i < 1000; i++) { |
| 183 | pmreg = bus_space_read_4(sc->sc_iot, |
| 184 | sc->sc_ioh, AMDPM_RNGSTAT); |
| 185 | if (pmreg & AMDPM_RNGDONE) |
| 186 | break; |
| 187 | delay(1); |
| 188 | } |
| 189 | if ((pmreg & AMDPM_RNGDONE) != 0) { |
| 190 | aprint_normal_dev(self, "" |
| 191 | "random number generator enabled (apprx. %dms)\n" , |
| 192 | i); |
| 193 | callout_init(&sc->sc_rnd_ch, CALLOUT_MPSAFE); |
| 194 | rndsource_setcb(&sc->sc_rnd_source, |
| 195 | amdpm_rnd_get, sc); |
| 196 | rnd_attach_source(&sc->sc_rnd_source, |
| 197 | device_xname(self), RND_TYPE_RNG, |
| 198 | RND_FLAG_COLLECT_VALUE|RND_FLAG_HASCB); |
| 199 | #ifdef AMDPM_RND_COUNTERS |
| 200 | evcnt_attach_dynamic(&sc->sc_rnd_hits, EVCNT_TYPE_MISC, |
| 201 | NULL, device_xname(self), "rnd hits" ); |
| 202 | evcnt_attach_dynamic(&sc->sc_rnd_miss, EVCNT_TYPE_MISC, |
| 203 | NULL, device_xname(self), "rnd miss" ); |
| 204 | for (i = 0; i < 256; i++) { |
| 205 | evcnt_attach_dynamic(&sc->sc_rnd_data[i], |
| 206 | EVCNT_TYPE_MISC, NULL, device_xname(self), |
| 207 | "rnd data" ); |
| 208 | } |
| 209 | #endif |
| 210 | sc->sc_rnd_need = RND_POOLBITS / NBBY; |
| 211 | amdpm_rnd_callout(sc); |
| 212 | } |
| 213 | } |
| 214 | } |
| 215 | |
| 216 | CFATTACH_DECL_NEW(amdpm, sizeof(struct amdpm_softc), |
| 217 | amdpm_match, amdpm_attach, NULL, NULL); |
| 218 | |
| 219 | static void |
| 220 | amdpm_rnd_callout_locked(void *v) |
| 221 | { |
| 222 | struct amdpm_softc *sc = v; |
| 223 | u_int32_t rngreg; |
| 224 | #ifdef AMDPM_RND_COUNTERS |
| 225 | int i; |
| 226 | #endif |
| 227 | |
| 228 | if (sc->sc_rnd_need < 1) { |
| 229 | callout_stop(&sc->sc_rnd_ch); |
| 230 | return; |
| 231 | } |
| 232 | |
| 233 | if ((bus_space_read_4(sc->sc_iot, sc->sc_ioh, AMDPM_RNGSTAT) & |
| 234 | AMDPM_RNGDONE) != 0) { |
| 235 | rngreg = bus_space_read_4(sc->sc_iot, sc->sc_ioh, |
| 236 | AMDPM_RNGDATA); |
| 237 | rnd_add_data(&sc->sc_rnd_source, &rngreg, |
| 238 | sizeof(rngreg), sizeof(rngreg) * NBBY); |
| 239 | sc->sc_rnd_need -= sizeof(rngreg); |
| 240 | #ifdef AMDPM_RND_COUNTERS |
| 241 | AMDPM_RNDCNT_INCR(&sc->sc_rnd_hits); |
| 242 | for (i = 0; i < sizeof(rngreg); i++, rngreg >>= NBBY) |
| 243 | AMDPM_RNDCNT_INCR(&sc->sc_rnd_data[rngreg & 0xff]); |
| 244 | #endif |
| 245 | } |
| 246 | #ifdef AMDPM_RND_COUNTERS |
| 247 | else |
| 248 | AMDPM_RNDCNT_INCR(&sc->sc_rnd_miss); |
| 249 | #endif |
| 250 | if (sc->sc_rnd_need > 0) { |
| 251 | callout_reset(&sc->sc_rnd_ch, 1, amdpm_rnd_callout, sc); |
| 252 | } |
| 253 | } |
| 254 | |
| 255 | static void |
| 256 | amdpm_rnd_callout(void *v) |
| 257 | { |
| 258 | struct amdpm_softc *sc = v; |
| 259 | |
| 260 | mutex_enter(&sc->sc_mutex); |
| 261 | amdpm_rnd_callout_locked(v); |
| 262 | mutex_exit(&sc->sc_mutex); |
| 263 | } |
| 264 | |