Annotation of sys/dev/pci/viaenv.c, Revision 1.1.1.1
1.1 nbrk 1: /* $OpenBSD: viaenv.c,v 1.11 2007/05/14 00:37:18 jsg Exp $ */
2: /* $NetBSD: viaenv.c,v 1.9 2002/10/02 16:51:59 thorpej Exp $ */
3:
4: /*
5: * Copyright (c) 2000 Johan Danielsson
6: * All rights reserved.
7: *
8: * Redistribution and use in source and binary forms, with or without
9: * modification, are permitted provided that the following conditions
10: * are met:
11: *
12: * 1. Redistributions of source code must retain the above copyright
13: * notice, this list of conditions and the following disclaimer.
14: *
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: * 3. Neither the name of author nor the names of any contributors may
20: * be used to endorse or promote products derived from this
21: * software without specific prior written permission.
22: *
23: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS
24: * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
25: * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
26: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
27: * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
28: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
29: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
30: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
31: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
32: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
33: * POSSIBILITY OF SUCH DAMAGE.
34: */
35:
36: /* driver for the hardware monitoring part of the VIA VT82C686A */
37:
38: #include <sys/param.h>
39: #include <sys/systm.h>
40: #include <sys/device.h>
41: #include <sys/kernel.h>
42: #include <sys/queue.h>
43: #include <sys/sensors.h>
44: #include <sys/timeout.h>
45: #ifdef __HAVE_TIMECOUNTER
46: #include <sys/timetc.h>
47: #endif
48:
49: #include <machine/bus.h>
50:
51: #include <dev/pci/pcivar.h>
52: #include <dev/pci/pcireg.h>
53: #include <dev/pci/pcidevs.h>
54:
55: #ifdef VIAENV_DEBUG
56: unsigned int viaenv_debug = 0;
57: #define DPRINTF(X) do { if(viaenv_debug) printf X ; } while(0)
58: #else
59: #define DPRINTF(X)
60: #endif
61:
62: #define VIANUMSENSORS 10 /* three temp, two fan, five voltage */
63:
64: struct viaenv_softc {
65: struct device sc_dev;
66: bus_space_tag_t sc_iot;
67: bus_space_handle_t sc_ioh;
68: bus_space_handle_t sc_pm_ioh;
69:
70: int sc_fan_div[2]; /* fan RPM divisor */
71:
72: struct ksensor sc_data[VIANUMSENSORS];
73: struct ksensordev sc_sensordev;
74: };
75:
76: int viaenv_match(struct device *, void *, void *);
77: void viaenv_attach(struct device *, struct device *, void *);
78:
79: int val_to_uK(unsigned int);
80: int val_to_rpm(unsigned int, int);
81: long val_to_uV(unsigned int, int);
82: void viaenv_refresh_sensor_data(struct viaenv_softc *);
83: void viaenv_refresh(void *);
84:
85: #ifdef __HAVE_TIMECOUNTER
86: u_int viaenv_get_timecount(struct timecounter *tc);
87:
88: struct timecounter viaenv_timecounter = {
89: viaenv_get_timecount, /* get_timecount */
90: 0, /* no poll_pps */
91: 0xffffff, /* counter_mask */
92: 3579545, /* frequency */
93: "VIAPM", /* name */
94: 1000 /* quality */
95: };
96: #endif /* __HAVE_TIMECOUNTER */
97:
98: struct cfattach viaenv_ca = {
99: sizeof(struct viaenv_softc),
100: viaenv_match,
101: viaenv_attach
102: };
103:
104: struct cfdriver viaenv_cd = {
105: NULL, "viaenv", DV_DULL
106: };
107:
108: struct timeout viaenv_timeout;
109:
110: const struct pci_matchid viaenv_devices[] = {
111: { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT82C686A_SMB },
112: { PCI_VENDOR_VIATECH, PCI_PRODUCT_VIATECH_VT8231_PWR }
113: };
114:
115: int
116: viaenv_match(struct device *parent, void *match, void *aux)
117: {
118: return (pci_matchbyid((struct pci_attach_args *)aux, viaenv_devices,
119: sizeof(viaenv_devices) / sizeof(viaenv_devices[0])));
120: }
121:
122: /*
123: * XXX there doesn't seem to exist much hard documentation on how to
124: * convert the raw values to usable units, this code is more or less
125: * stolen from the Linux driver, but changed to suit our conditions
126: */
127:
128: /*
129: * lookup-table to translate raw values to uK, this is the same table
130: * used by the Linux driver (modulo units); there is a fifth degree
131: * polynomial that supposedly been used to generate this table, but I
132: * haven't been able to figure out how -- it doesn't give the same values
133: */
134:
135: static const long val_to_temp[] = {
136: 20225, 20435, 20645, 20855, 21045, 21245, 21425, 21615, 21785, 21955,
137: 22125, 22285, 22445, 22605, 22755, 22895, 23035, 23175, 23315, 23445,
138: 23565, 23695, 23815, 23925, 24045, 24155, 24265, 24365, 24465, 24565,
139: 24665, 24765, 24855, 24945, 25025, 25115, 25195, 25275, 25355, 25435,
140: 25515, 25585, 25655, 25725, 25795, 25865, 25925, 25995, 26055, 26115,
141: 26175, 26235, 26295, 26355, 26405, 26465, 26515, 26575, 26625, 26675,
142: 26725, 26775, 26825, 26875, 26925, 26975, 27025, 27065, 27115, 27165,
143: 27205, 27255, 27295, 27345, 27385, 27435, 27475, 27515, 27565, 27605,
144: 27645, 27685, 27735, 27775, 27815, 27855, 27905, 27945, 27985, 28025,
145: 28065, 28105, 28155, 28195, 28235, 28275, 28315, 28355, 28405, 28445,
146: 28485, 28525, 28565, 28615, 28655, 28695, 28735, 28775, 28825, 28865,
147: 28905, 28945, 28995, 29035, 29075, 29125, 29165, 29205, 29245, 29295,
148: 29335, 29375, 29425, 29465, 29505, 29555, 29595, 29635, 29685, 29725,
149: 29765, 29815, 29855, 29905, 29945, 29985, 30035, 30075, 30125, 30165,
150: 30215, 30255, 30305, 30345, 30385, 30435, 30475, 30525, 30565, 30615,
151: 30655, 30705, 30755, 30795, 30845, 30885, 30935, 30975, 31025, 31075,
152: 31115, 31165, 31215, 31265, 31305, 31355, 31405, 31455, 31505, 31545,
153: 31595, 31645, 31695, 31745, 31805, 31855, 31905, 31955, 32005, 32065,
154: 32115, 32175, 32225, 32285, 32335, 32395, 32455, 32515, 32575, 32635,
155: 32695, 32755, 32825, 32885, 32955, 33025, 33095, 33155, 33235, 33305,
156: 33375, 33455, 33525, 33605, 33685, 33765, 33855, 33935, 34025, 34115,
157: 34205, 34295, 34395, 34495, 34595, 34695, 34805, 34905, 35015, 35135,
158: 35245, 35365, 35495, 35615, 35745, 35875, 36015, 36145, 36295, 36435,
159: 36585, 36745, 36895, 37065, 37225, 37395, 37575, 37755, 37935, 38125,
160: 38325, 38525, 38725, 38935, 39155, 39375, 39605, 39835, 40075, 40325,
161: 40575, 40835, 41095, 41375, 41655, 41935,
162: };
163:
164: /* use above table to convert values to temperatures in micro-Kelvins */
165: int
166: val_to_uK(unsigned int val)
167: {
168: int i = val / 4;
169: int j = val % 4;
170:
171: assert(i >= 0 && i <= 255);
172:
173: if (j == 0 || i == 255)
174: return val_to_temp[i] * 10000;
175:
176: /* is linear interpolation ok? */
177: return (val_to_temp[i] * (4 - j) +
178: val_to_temp[i + 1] * j) * 2500 /* really: / 4 * 10000 */ ;
179: }
180:
181: int
182: val_to_rpm(unsigned int val, int div)
183: {
184:
185: if (val == 0)
186: return 0;
187:
188: return 1350000 / val / div;
189: }
190:
191: long
192: val_to_uV(unsigned int val, int index)
193: {
194: static const long mult[] =
195: {1250000, 1250000, 1670000, 2600000, 6300000};
196:
197: assert(index >= 0 && index <= 4);
198:
199: return (25LL * val + 133) * mult[index] / 2628;
200: }
201:
202: #define VIAENV_TSENS3 0x1f
203: #define VIAENV_TSENS1 0x20
204: #define VIAENV_TSENS2 0x21
205: #define VIAENV_VSENS1 0x22
206: #define VIAENV_VSENS2 0x23
207: #define VIAENV_VCORE 0x24
208: #define VIAENV_VSENS3 0x25
209: #define VIAENV_VSENS4 0x26
210: #define VIAENV_FAN1 0x29
211: #define VIAENV_FAN2 0x2a
212: #define VIAENV_FANCONF 0x47 /* fan configuration */
213: #define VIAENV_TLOW 0x49 /* temperature low order value */
214: #define VIAENV_TIRQ 0x4b /* temperature interrupt configuration */
215:
216: #define VIAENV_GENCFG 0x40 /* general configuration */
217: #define VIAENV_GENCFG_TMR32 (1 << 11) /* 32-bit PM timer */
218: #define VIAENV_GENCFG_PMEN (1 << 15) /* enable PM I/O space */
219: #define VIAENV_PMBASE 0x48 /* power management I/O space base */
220: #define VIAENV_PMSIZE 128 /* power management I/O space size */
221: #define VIAENV_PM_TMR 0x08 /* PM timer */
222:
223: void
224: viaenv_refresh_sensor_data(struct viaenv_softc *sc)
225: {
226: int i;
227: u_int8_t v, v2;
228:
229: /* temperature */
230: v = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_TIRQ);
231: v2 = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_TSENS1);
232: DPRINTF(("TSENS1 = %d\n", (v2 << 2) | (v >> 6)));
233: sc->sc_data[0].value = val_to_uK((v2 << 2) | (v >> 6));
234:
235: v = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_TLOW);
236: v2 = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_TSENS2);
237: DPRINTF(("TSENS2 = %d\n", (v2 << 2) | ((v >> 4) & 0x3)));
238: sc->sc_data[1].value = val_to_uK((v2 << 2) | ((v >> 4) & 0x3));
239:
240: v2 = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_TSENS3);
241: DPRINTF(("TSENS3 = %d\n", (v2 << 2) | (v >> 6)));
242: sc->sc_data[2].value = val_to_uK((v2 << 2) | (v >> 6));
243:
244: v = bus_space_read_1(sc->sc_iot, sc->sc_ioh, VIAENV_FANCONF);
245:
246: sc->sc_fan_div[0] = 1 << ((v >> 4) & 0x3);
247: sc->sc_fan_div[1] = 1 << ((v >> 6) & 0x3);
248:
249: /* fan */
250: for (i = 3; i <= 4; i++) {
251: v = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
252: VIAENV_FAN1 + i - 3);
253: DPRINTF(("FAN%d = %d / %d\n", i - 3, v,
254: sc->sc_fan_div[i - 3]));
255: sc->sc_data[i].value = val_to_rpm(v, sc->sc_fan_div[i - 3]);
256: }
257:
258: /* voltage */
259: for (i = 5; i <= 9; i++) {
260: v = bus_space_read_1(sc->sc_iot, sc->sc_ioh,
261: VIAENV_VSENS1 + i - 5);
262: DPRINTF(("V%d = %d\n", i - 5, v));
263: sc->sc_data[i].value = val_to_uV(v, i - 5);
264: }
265: }
266:
267: void
268: viaenv_attach(struct device * parent, struct device * self, void *aux)
269: {
270: struct viaenv_softc *sc = (struct viaenv_softc *) self;
271: struct pci_attach_args *pa = aux;
272: pcireg_t iobase, control;
273: int i;
274:
275: iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x70);
276: control = pci_conf_read(pa->pa_pc, pa->pa_tag, 0x74);
277: if ((iobase & 0xff80) == 0 || (control & 1) == 0) {
278: printf(": HWM disabled");
279: goto nohwm;
280: }
281: sc->sc_iot = pa->pa_iot;
282: if (bus_space_map(sc->sc_iot, iobase & 0xff80, 128, 0, &sc->sc_ioh)) {
283: printf(": failed to map HWM I/O space");
284: goto nohwm;
285: }
286:
287: for (i = 0; i <= 2; i++) {
288: sc->sc_data[i].type = SENSOR_TEMP;
289: }
290:
291: for (i = 3; i <= 4; i++) {
292: sc->sc_data[i].type = SENSOR_FANRPM;
293: }
294:
295: for (i = 5; i <= 9; ++i) {
296: sc->sc_data[i].type = SENSOR_VOLTS_DC;
297: }
298: strlcpy(sc->sc_data[5].desc, "VSENS1",
299: sizeof(sc->sc_data[5].desc)); /* CPU core (2V) */
300: strlcpy(sc->sc_data[6].desc, "VSENS2",
301: sizeof(sc->sc_data[6].desc)); /* NB core? (2.5V) */
302: strlcpy(sc->sc_data[7].desc, "Vcore",
303: sizeof(sc->sc_data[7].desc)); /* Vcore (3.3V) */
304: strlcpy(sc->sc_data[8].desc, "VSENS3",
305: sizeof(sc->sc_data[8].desc)); /* VSENS3 (5V) */
306: strlcpy(sc->sc_data[9].desc, "VSENS4",
307: sizeof(sc->sc_data[9].desc)); /* VSENS4 (12V) */
308:
309: /* Get initial set of sensor values. */
310: viaenv_refresh_sensor_data(sc);
311:
312: /* Register sensors with sysctl */
313: strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,
314: sizeof(sc->sc_sensordev.xname));
315: for (i = 0; i < VIANUMSENSORS; ++i)
316: sensor_attach(&sc->sc_sensordev, &sc->sc_data[i]);
317: sensordev_install(&sc->sc_sensordev);
318:
319: /* Refresh sensors data every 1.5 seconds */
320: timeout_set(&viaenv_timeout, viaenv_refresh, sc);
321: timeout_add(&viaenv_timeout, (15 * hz) / 10);
322:
323: nohwm:
324: #ifdef __HAVE_TIMECOUNTER
325: /* Check if power management I/O space is enabled */
326: control = pci_conf_read(pa->pa_pc, pa->pa_tag, VIAENV_GENCFG);
327: if ((control & VIAENV_GENCFG_PMEN) == 0) {
328: printf(": PM disabled");
329: goto nopm;
330: }
331:
332: /* Map power management I/O space */
333: iobase = pci_conf_read(pa->pa_pc, pa->pa_tag, VIAENV_PMBASE);
334: if (bus_space_map(sc->sc_iot, PCI_MAPREG_IO_ADDR(iobase),
335: VIAENV_PMSIZE, 0, &sc->sc_pm_ioh)) {
336: printf(": failed to map PM I/O space");
337: goto nopm;
338: }
339:
340: /* Check for 32-bit PM timer */
341: if (control & VIAENV_GENCFG_TMR32)
342: viaenv_timecounter.tc_counter_mask = 0xffffffff;
343:
344: /* Register new timecounter */
345: viaenv_timecounter.tc_priv = sc;
346: tc_init(&viaenv_timecounter);
347:
348: printf(": %s-bit timer at %lluHz",
349: (viaenv_timecounter.tc_counter_mask == 0xffffffff ? "32" : "24"),
350: (unsigned long long)viaenv_timecounter.tc_frequency);
351:
352: nopm:
353: #endif /* __HAVE_TIMECOUNTER */
354: printf("\n");
355: }
356:
357: void
358: viaenv_refresh(void *arg)
359: {
360: struct viaenv_softc *sc = (struct viaenv_softc *)arg;
361:
362: viaenv_refresh_sensor_data(sc);
363: timeout_add(&viaenv_timeout, (15 * hz) / 10);
364: }
365:
366: #ifdef __HAVE_TIMECOUNTER
367: u_int
368: viaenv_get_timecount(struct timecounter *tc)
369: {
370: struct viaenv_softc *sc = tc->tc_priv;
371: u_int u1, u2, u3;
372:
373: u2 = bus_space_read_4(sc->sc_iot, sc->sc_pm_ioh, VIAENV_PM_TMR);
374: u3 = bus_space_read_4(sc->sc_iot, sc->sc_pm_ioh, VIAENV_PM_TMR);
375: do {
376: u1 = u2;
377: u2 = u3;
378: u3 = bus_space_read_4(sc->sc_iot, sc->sc_pm_ioh,
379: VIAENV_PM_TMR);
380: } while (u1 > u2 || u2 > u3);
381:
382: return (u2);
383: }
384: #endif /* __HAVE_TIMECOUNTER */
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