pcf8591_envctrl.c revision 1.6
1 /* $NetBSD: pcf8591_envctrl.c,v 1.6 2012/03/18 05:26:58 mrg Exp $ */ 2 /* $OpenBSD: pcf8591_envctrl.c,v 1.6 2007/10/25 21:17:20 kettenis Exp $ */ 3 4 /* 5 * Copyright (c) 2006 Damien Miller <djm (at) openbsd.org> 6 * Copyright (c) 2007 Mark Kettenis <kettenis (at) openbsd.org> 7 * 8 * Permission to use, copy, modify, and distribute this software for any 9 * purpose with or without fee is hereby granted, provided that the above 10 * copyright notice and this permission notice appear in all copies. 11 * 12 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 */ 20 21 #include <sys/cdefs.h> 22 __KERNEL_RCSID(0, "$NetBSD: pcf8591_envctrl.c,v 1.6 2012/03/18 05:26:58 mrg Exp $"); 23 24 #include <sys/param.h> 25 #include <sys/systm.h> 26 #include <sys/device.h> 27 28 #include <dev/sysmon/sysmonvar.h> 29 30 #include <dev/ofw/openfirm.h> 31 #include <dev/i2c/i2cvar.h> 32 33 #define PCF8591_CHANNELS 4 34 35 #define PCF8591_CTRL_CH0 0x00 36 #define PCF8591_CTRL_CH1 0x01 37 #define PCF8591_CTRL_CH2 0x02 38 #define PCF8591_CTRL_CH3 0x03 39 #define PCF8591_CTRL_AUTOINC 0x04 40 #define PCF8591_CTRL_OSCILLATOR 0x40 41 42 struct ecadc_channel { 43 u_int chan_num; 44 envsys_data_t chan_sensor; 45 u_char *chan_xlate; 46 int64_t chan_factor; 47 int64_t chan_min; 48 int64_t chan_warn; 49 int64_t chan_crit; 50 }; 51 52 struct ecadc_softc { 53 device_t sc_dev; 54 i2c_tag_t sc_tag; 55 i2c_addr_t sc_addr; 56 u_char sc_ps_xlate[256]; 57 u_char sc_cpu_xlate[256]; 58 u_int sc_nchan; 59 struct ecadc_channel sc_channels[PCF8591_CHANNELS]; 60 struct sysmon_envsys *sc_sme; 61 }; 62 63 static int ecadc_match(device_t, cfdata_t, void *); 64 static void ecadc_attach(device_t, device_t, void *); 65 static void ecadc_refresh(struct sysmon_envsys *, envsys_data_t *); 66 static void ecadc_get_limits(struct sysmon_envsys *, envsys_data_t *, 67 sysmon_envsys_lim_t *, uint32_t *); 68 69 CFATTACH_DECL_NEW(ecadc, sizeof(struct ecadc_softc), 70 ecadc_match, ecadc_attach, NULL, NULL); 71 72 static const char * ecadc_compats[] = { 73 "ecadc", 74 NULL 75 }; 76 77 static int 78 ecadc_match(device_t parent, cfdata_t cf, void *aux) 79 { 80 struct i2c_attach_args *ia = aux; 81 82 if (iic_compat_match(ia, ecadc_compats)) 83 return 1; 84 85 return 0; 86 } 87 88 static void 89 ecadc_attach(device_t parent, device_t self, void *aux) 90 { 91 struct i2c_attach_args *ia = aux; 92 struct ecadc_softc *sc = device_private(self); 93 u_char term[256]; 94 u_char *cp, *desc; 95 int64_t minv, warnv, crit, num, den; 96 u_int8_t junk[PCF8591_CHANNELS + 1]; 97 envsys_data_t *sensor; 98 int len, error, addr, chan, node = (int)ia->ia_cookie; 99 u_int i; 100 101 sc->sc_dev = self; 102 if ((len = OF_getprop(node, "thermisters", term, 103 sizeof(term))) < 0) { 104 aprint_error(": couldn't find \"thermisters\" property\n"); 105 return; 106 } 107 108 if (OF_getprop(node, "cpu-temp-factors", &sc->sc_cpu_xlate[2], 109 sizeof(sc->sc_cpu_xlate) - 2) < 0) { 110 aprint_error(": couldn't find \"cpu-temp-factors\" property\n"); 111 return; 112 } 113 sc->sc_cpu_xlate[0] = sc->sc_cpu_xlate[1] = sc->sc_cpu_xlate[2]; 114 115 /* Only the Sun Enterprise 450 has these. */ 116 OF_getprop(node, "ps-temp-factors", &sc->sc_ps_xlate[2], 117 sizeof(sc->sc_ps_xlate) - 2); 118 sc->sc_ps_xlate[0] = sc->sc_ps_xlate[1] = sc->sc_ps_xlate[2]; 119 120 cp = term; 121 while (cp < term + len) { 122 addr = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 123 chan = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 124 minv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 125 warnv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 126 crit = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 127 num = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 128 den = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 129 desc = cp; 130 while (cp < term + len && *cp++); 131 132 if (addr != (ia->ia_addr << 1)) 133 continue; 134 135 if (num == 0 || den == 0) 136 num = den = 1; 137 138 sc->sc_channels[sc->sc_nchan].chan_num = chan; 139 140 sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 141 sensor->units = ENVSYS_STEMP; 142 sensor->flags |= ENVSYS_FMONLIMITS; 143 sensor->state = ENVSYS_SINVALID; 144 strlcpy(sensor->desc, desc, sizeof(sensor->desc)); 145 146 if (strncmp(desc, "CPU", 3) == 0) 147 sc->sc_channels[sc->sc_nchan].chan_xlate = 148 sc->sc_cpu_xlate; 149 else if (strncmp(desc, "PS", 2) == 0) 150 sc->sc_channels[sc->sc_nchan].chan_xlate = 151 sc->sc_ps_xlate; 152 else 153 sc->sc_channels[sc->sc_nchan].chan_factor = 154 (1000000 * num) / den; 155 sc->sc_channels[sc->sc_nchan].chan_min = 156 273150000 + 1000000 * minv; 157 sc->sc_channels[sc->sc_nchan].chan_warn = 158 273150000 + 1000000 * warnv; 159 sc->sc_channels[sc->sc_nchan].chan_crit = 160 273150000 + 1000000 * crit; 161 sc->sc_nchan++; 162 } 163 164 sc->sc_tag = ia->ia_tag; 165 sc->sc_addr = ia->ia_addr; 166 167 iic_acquire_bus(sc->sc_tag, 0); 168 169 /* Try a read now, so we can fail if it doesn't work */ 170 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 171 NULL, 0, junk, sc->sc_nchan + 1, 0)) { 172 aprint_error(": read failed\n"); 173 iic_release_bus(sc->sc_tag, 0); 174 return; 175 } 176 177 iic_release_bus(sc->sc_tag, 0); 178 179 /* Hook us into the sysmon_envsys subsystem */ 180 sc->sc_sme = sysmon_envsys_create(); 181 sc->sc_sme->sme_name = device_xname(self); 182 sc->sc_sme->sme_cookie = sc; 183 sc->sc_sme->sme_refresh = ecadc_refresh; 184 sc->sc_sme->sme_get_limits = ecadc_get_limits; 185 186 /* Initialize sensor data. */ 187 for (i = 0; i < sc->sc_nchan; i++) 188 sysmon_envsys_sensor_attach(sc->sc_sme, 189 &sc->sc_channels[i].chan_sensor); 190 191 error = sysmon_envsys_register(sc->sc_sme); 192 if (error) { 193 aprint_error_dev(self, "error %d registering with sysmon\n", 194 error); 195 sysmon_envsys_destroy(sc->sc_sme); 196 return; 197 } 198 199 aprint_naive(": Temp Sensors\n"); 200 aprint_normal(": %s Temp Sensors\n", ia->ia_name); 201 } 202 203 static void 204 ecadc_refresh(struct sysmon_envsys *sme, envsys_data_t *sensor) 205 { 206 struct ecadc_softc *sc = sme->sme_cookie; 207 u_int i; 208 u_int8_t data[PCF8591_CHANNELS + 1]; 209 u_int8_t ctrl = PCF8591_CTRL_CH0 | PCF8591_CTRL_AUTOINC | 210 PCF8591_CTRL_OSCILLATOR; 211 212 iic_acquire_bus(sc->sc_tag, 0); 213 if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 214 &ctrl, 1, NULL, 0, 0)) { 215 iic_release_bus(sc->sc_tag, 0); 216 return; 217 } 218 /* NB: first byte out is stale, so read num_channels + 1 */ 219 if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 220 NULL, 0, data, PCF8591_CHANNELS + 1, 0)) { 221 iic_release_bus(sc->sc_tag, 0); 222 return; 223 } 224 iic_release_bus(sc->sc_tag, 0); 225 226 /* We only support temperature channels. */ 227 for (i = 0; i < sc->sc_nchan; i++) { 228 struct ecadc_channel *chp = &sc->sc_channels[i]; 229 230 if (chp->chan_xlate) 231 chp->chan_sensor.value_cur = 273150000 + 1000000 * 232 chp->chan_xlate[data[1 + chp->chan_num]]; 233 else 234 chp->chan_sensor.value_cur = 273150000 + 235 chp->chan_factor * data[1 + chp->chan_num]; 236 237 chp->chan_sensor.state = ENVSYS_SVALID; 238 chp->chan_sensor.flags &= ~ENVSYS_FNEED_REFRESH; 239 chp->chan_sensor.flags |= ENVSYS_FMONLIMITS; 240 } 241 } 242 243 static void 244 ecadc_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 245 sysmon_envsys_lim_t *limits, uint32_t *props) 246 { 247 struct ecadc_softc *sc = sme->sme_cookie; 248 int i; 249 250 for (i = 0; i < sc->sc_nchan; i++) { 251 if (edata != &sc->sc_channels[i].chan_sensor) 252 continue; 253 *props |= PROP_WARNMIN|PROP_WARNMAX|PROP_CRITMAX; 254 limits->sel_warnmin = sc->sc_channels[i].chan_min; 255 limits->sel_warnmax = sc->sc_channels[i].chan_warn; 256 limits->sel_critmax = sc->sc_channels[i].chan_crit; 257 return; 258 } 259 } 260
Indexes created Tue Sep 30 11:09:46 GMT 2025