1 /* $OpenBSD: kate.c,v 1.8 2022/03/11 18:00:50 mpi Exp $ */
2
3 /*
4 * Copyright (c) 2008 Constantine A. Murenin <cnst+openbsd@bugmail.mojo.ru>
5 *
6 * Permission to use, copy, modify, and distribute this software for any
7 * purpose with or without fee is hereby granted, provided that the above
8 * copyright notice and this permission notice appear in all copies.
9 *
10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17 */
18
19 #include <sys/param.h>
20 #include <sys/systm.h>
21 #include <sys/device.h>
22 #include <sys/sensors.h>
23
24 #include <dev/pci/pcireg.h>
25 #include <dev/pci/pcivar.h>
26 #include <dev/pci/pcidevs.h>
27
28
29 /*
30 * AMD NPT Family 0Fh Processors, Function 3 -- Miscellaneous Control
31 */
32
33 /* Function 3 Registers */
34 #define K_THERMTRIP_STAT_R 0xe4
35 #define K_NORTHBRIDGE_CAP_R 0xe8
36 #define K_CPUID_FAMILY_MODEL_R 0xfc
37
38 /* Bits within Thermtrip Status Register */
39 #define K_THERM_SENSE_SEL (1 << 6)
40 #define K_THERM_SENSE_CORE_SEL (1 << 2)
41
42 /* Flip core and sensor selection bits */
43 #define K_T_SEL_C0(v) (v |= K_THERM_SENSE_CORE_SEL)
44 #define K_T_SEL_C1(v) (v &= ~(K_THERM_SENSE_CORE_SEL))
45 #define K_T_SEL_S0(v) (v &= ~(K_THERM_SENSE_SEL))
46 #define K_T_SEL_S1(v) (v |= K_THERM_SENSE_SEL)
47
48
49 /*
50 * Revision Guide for AMD NPT Family 0Fh Processors,
51 * Publication # 33610, Revision 3.30, February 2008
52 */
53 static const struct {
54 const char rev[5];
55 const pcireg_t cpuid[5];
56 } kate_proc[] = {
57 { "BH-F", { 0x00040FB0, 0x00040F80, 0, 0, 0 } }, /* F2 */
58 { "DH-F", { 0x00040FF0, 0x00050FF0, 0x00040FC0, 0, 0 } }, /* F2, F3 */
59 { "JH-F", { 0x00040F10, 0x00040F30, 0x000C0F10, 0, 0 } }, /* F2, F3 */
60 { "BH-G", { 0x00060FB0, 0x00060F80, 0, 0, 0 } }, /* G1, G2 */
61 { "DH-G", { 0x00070FF0, 0x00060FF0,
62 0x00060FC0, 0x00070FC0, 0 } } /* G1, G2 */
63 };
64
65
66 struct kate_softc {
67 struct device sc_dev;
68
69 pci_chipset_tag_t sc_pc;
70 pcitag_t sc_pcitag;
71
72 struct ksensor sc_sensors[4];
73 struct ksensordev sc_sensordev;
74
75 char sc_rev;
76 int8_t sc_numsensors;
77 };
78
79 int kate_match(struct device *, void *, void *);
80 void kate_attach(struct device *, struct device *, void *);
81 void kate_refresh(void *);
82
83 const struct cfattach kate_ca = {
84 sizeof(struct kate_softc), kate_match, kate_attach
85 };
86
87 struct cfdriver kate_cd = {
88 NULL, "kate", DV_DULL
89 };
90
91
92 int
kate_match(struct device * parent,void * match,void * aux)93 kate_match(struct device *parent, void *match, void *aux)
94 {
95 struct pci_attach_args *pa = aux;
96 #ifndef KATE_STRICT
97 struct kate_softc ks;
98 struct kate_softc *sc = &ks;
99 #endif /* !KATE_STRICT */
100 pcireg_t c;
101 int i, j;
102
103 if (PCI_VENDOR(pa->pa_id) != PCI_VENDOR_AMD ||
104 PCI_PRODUCT(pa->pa_id) != PCI_PRODUCT_AMD_0F_MISC)
105 return 0;
106
107 /*
108 * First, let's probe for chips at or after Revision F, which is
109 * when the temperature readings were officially introduced.
110 */
111 c = pci_conf_read(pa->pa_pc, pa->pa_tag, K_CPUID_FAMILY_MODEL_R);
112 for (i = 0; i < sizeof(kate_proc) / sizeof(kate_proc[0]); i++)
113 for (j = 0; kate_proc[i].cpuid[j] != 0; j++)
114 if ((c & ~0xf) == kate_proc[i].cpuid[j])
115 return 2; /* supersede pchb(4) */
116
117 #ifndef KATE_STRICT
118 /*
119 * If the probe above was not successful, let's try to actually
120 * read the sensors from the chip, and see if they make any sense.
121 */
122 sc->sc_numsensors = 4;
123 sc->sc_pc = pa->pa_pc;
124 sc->sc_pcitag = pa->pa_tag;
125 kate_refresh(sc);
126 for (i = 0; i < sc->sc_numsensors; i++)
127 if (!(sc->sc_sensors[i].flags & SENSOR_FINVALID))
128 return 2; /* supersede pchb(4) */
129 #endif /* !KATE_STRICT */
130
131 return 0;
132 }
133
134 void
kate_attach(struct device * parent,struct device * self,void * aux)135 kate_attach(struct device *parent, struct device *self, void *aux)
136 {
137 struct kate_softc *sc = (struct kate_softc *)self;
138 struct pci_attach_args *pa = aux;
139 pcireg_t c, d;
140 int i, j, cmpcap;
141
142 c = pci_conf_read(pa->pa_pc, pa->pa_tag, K_CPUID_FAMILY_MODEL_R);
143 for (i = 0; i < sizeof(kate_proc) / sizeof(kate_proc[0]) &&
144 sc->sc_rev == '\0'; i++)
145 for (j = 0; kate_proc[i].cpuid[j] != 0; j++)
146 if ((c & ~0xf) == kate_proc[i].cpuid[j]) {
147 sc->sc_rev = kate_proc[i].rev[3];
148 printf(": core rev %.4s%.1x",
149 kate_proc[i].rev, c & 0xf);
150 }
151
152 if (c != 0x0 && sc->sc_rev == '\0') {
153 /* CPUID Family Model Register was introduced in Revision F */
154 sc->sc_rev = 'G'; /* newer than E, assume G */
155 printf(": cpuid 0x%x", c);
156 }
157
158 d = pci_conf_read(pa->pa_pc, pa->pa_tag, K_NORTHBRIDGE_CAP_R);
159 cmpcap = (d >> 12) & 0x3;
160
161 sc->sc_pc = pa->pa_pc;
162 sc->sc_pcitag = pa->pa_tag;
163
164 #ifndef KATE_STRICT
165 sc->sc_numsensors = 4;
166 kate_refresh(sc);
167 if (cmpcap == 0 &&
168 (sc->sc_sensors[2].flags & SENSOR_FINVALID) &&
169 (sc->sc_sensors[3].flags & SENSOR_FINVALID))
170 sc->sc_numsensors = 2;
171 #else
172 sc->sc_numsensors = cmpcap ? 4 : 2;
173 #endif /* !KATE_STRICT */
174
175 strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
176 sizeof(sc->sc_sensordev.xname));
177
178 for (i = 0; i < sc->sc_numsensors; i++) {
179 sc->sc_sensors[i].type = SENSOR_TEMP;
180 sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);
181 }
182
183 if (sensor_task_register(sc, kate_refresh, 5) == NULL) {
184 printf(": unable to register update task\n");
185 return;
186 }
187
188 sensordev_install(&sc->sc_sensordev);
189
190 printf("\n");
191 }
192
193 void
kate_refresh(void * arg)194 kate_refresh(void *arg)
195 {
196 struct kate_softc *sc = arg;
197 struct ksensor *s = sc->sc_sensors;
198 int8_t n = sc->sc_numsensors;
199 pcireg_t t, m;
200 int i, v;
201
202 t = pci_conf_read(sc->sc_pc, sc->sc_pcitag, K_THERMTRIP_STAT_R);
203
204 for (i = 0; i < n; i++) {
205 switch(i) {
206 case 0:
207 K_T_SEL_C0(t);
208 K_T_SEL_S0(t);
209 break;
210 case 1:
211 K_T_SEL_C0(t);
212 K_T_SEL_S1(t);
213 break;
214 case 2:
215 K_T_SEL_C1(t);
216 K_T_SEL_S0(t);
217 break;
218 case 3:
219 K_T_SEL_C1(t);
220 K_T_SEL_S1(t);
221 break;
222 }
223 m = t & (K_THERM_SENSE_CORE_SEL | K_THERM_SENSE_SEL);
224 pci_conf_write(sc->sc_pc, sc->sc_pcitag, K_THERMTRIP_STAT_R, t);
225 t = pci_conf_read(sc->sc_pc, sc->sc_pcitag, K_THERMTRIP_STAT_R);
226 v = 0x3ff & (t >> 14);
227 #ifdef KATE_STRICT
228 if (sc->sc_rev != 'G')
229 v &= ~0x3;
230 #endif /* KATE_STRICT */
231 if ((t & (K_THERM_SENSE_CORE_SEL | K_THERM_SENSE_SEL)) == m &&
232 (v & ~0x3) != 0)
233 s[i].flags &= ~SENSOR_FINVALID;
234 else
235 s[i].flags |= SENSOR_FINVALID;
236 s[i].value = (v * 250000 - 49000000) + 273150000;
237 }
238 }
239