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 | |