pcf8591_envctrl.c revision 1.3.2.2
1 1.3.2.2 yamt /* $NetBSD: pcf8591_envctrl.c,v 1.3.2.2 2010/03/11 15:03:00 yamt Exp $ */ 2 1.3.2.2 yamt /* $OpenBSD: pcf8591_envctrl.c,v 1.6 2007/10/25 21:17:20 kettenis Exp $ */ 3 1.3.2.2 yamt 4 1.3.2.2 yamt /* 5 1.3.2.2 yamt * Copyright (c) 2006 Damien Miller <djm (at) openbsd.org> 6 1.3.2.2 yamt * Copyright (c) 2007 Mark Kettenis <kettenis (at) openbsd.org> 7 1.3.2.2 yamt * 8 1.3.2.2 yamt * Permission to use, copy, modify, and distribute this software for any 9 1.3.2.2 yamt * purpose with or without fee is hereby granted, provided that the above 10 1.3.2.2 yamt * copyright notice and this permission notice appear in all copies. 11 1.3.2.2 yamt * 12 1.3.2.2 yamt * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 13 1.3.2.2 yamt * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 14 1.3.2.2 yamt * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 15 1.3.2.2 yamt * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 16 1.3.2.2 yamt * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 17 1.3.2.2 yamt * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 18 1.3.2.2 yamt * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 19 1.3.2.2 yamt */ 20 1.3.2.2 yamt 21 1.3.2.2 yamt #include <sys/param.h> 22 1.3.2.2 yamt #include <sys/systm.h> 23 1.3.2.2 yamt #include <sys/device.h> 24 1.3.2.2 yamt 25 1.3.2.2 yamt #include <dev/sysmon/sysmonvar.h> 26 1.3.2.2 yamt 27 1.3.2.2 yamt #include <dev/ofw/openfirm.h> 28 1.3.2.2 yamt #include <dev/i2c/i2cvar.h> 29 1.3.2.2 yamt 30 1.3.2.2 yamt #define PCF8591_CHANNELS 4 31 1.3.2.2 yamt 32 1.3.2.2 yamt #define PCF8591_CTRL_CH0 0x00 33 1.3.2.2 yamt #define PCF8591_CTRL_CH1 0x01 34 1.3.2.2 yamt #define PCF8591_CTRL_CH2 0x02 35 1.3.2.2 yamt #define PCF8591_CTRL_CH3 0x03 36 1.3.2.2 yamt #define PCF8591_CTRL_AUTOINC 0x04 37 1.3.2.2 yamt #define PCF8591_CTRL_OSCILLATOR 0x40 38 1.3.2.2 yamt 39 1.3.2.2 yamt struct ecadc_channel { 40 1.3.2.2 yamt u_int chan_num; 41 1.3.2.2 yamt envsys_data_t chan_sensor; 42 1.3.2.2 yamt u_char *chan_xlate; 43 1.3.2.2 yamt int64_t chan_factor; 44 1.3.2.2 yamt int64_t chan_min; 45 1.3.2.2 yamt int64_t chan_warn; 46 1.3.2.2 yamt int64_t chan_crit; 47 1.3.2.2 yamt }; 48 1.3.2.2 yamt 49 1.3.2.2 yamt struct ecadc_softc { 50 1.3.2.2 yamt device_t sc_dev; 51 1.3.2.2 yamt i2c_tag_t sc_tag; 52 1.3.2.2 yamt i2c_addr_t sc_addr; 53 1.3.2.2 yamt u_char sc_ps_xlate[256]; 54 1.3.2.2 yamt u_char sc_cpu_xlate[256]; 55 1.3.2.2 yamt u_int sc_nchan; 56 1.3.2.2 yamt struct ecadc_channel sc_channels[PCF8591_CHANNELS]; 57 1.3.2.2 yamt struct sysmon_envsys *sc_sme; 58 1.3.2.2 yamt }; 59 1.3.2.2 yamt 60 1.3.2.2 yamt static int ecadc_match(device_t, cfdata_t, void *); 61 1.3.2.2 yamt static void ecadc_attach(device_t, device_t, void *); 62 1.3.2.2 yamt static void ecadc_refresh(struct sysmon_envsys *, envsys_data_t *); 63 1.3.2.2 yamt static void ecadc_get_limits(struct sysmon_envsys *, envsys_data_t *, 64 1.3.2.2 yamt sysmon_envsys_lim_t *, uint32_t *); 65 1.3.2.2 yamt 66 1.3.2.2 yamt CFATTACH_DECL_NEW(ecadc, sizeof(struct ecadc_softc), 67 1.3.2.2 yamt ecadc_match, ecadc_attach, NULL, NULL); 68 1.3.2.2 yamt 69 1.3.2.2 yamt static const char * ecadc_compats[] = { 70 1.3.2.2 yamt "ecadc", 71 1.3.2.2 yamt NULL 72 1.3.2.2 yamt }; 73 1.3.2.2 yamt 74 1.3.2.2 yamt static int 75 1.3.2.2 yamt ecadc_match(device_t parent, cfdata_t cf, void *aux) 76 1.3.2.2 yamt { 77 1.3.2.2 yamt struct i2c_attach_args *ia = aux; 78 1.3.2.2 yamt 79 1.3.2.2 yamt if (iic_compat_match(ia, ecadc_compats)) 80 1.3.2.2 yamt return 1; 81 1.3.2.2 yamt 82 1.3.2.2 yamt return 0; 83 1.3.2.2 yamt } 84 1.3.2.2 yamt 85 1.3.2.2 yamt static void 86 1.3.2.2 yamt ecadc_attach(device_t parent, device_t self, void *aux) 87 1.3.2.2 yamt { 88 1.3.2.2 yamt struct i2c_attach_args *ia = aux; 89 1.3.2.2 yamt struct ecadc_softc *sc = device_private(self); 90 1.3.2.2 yamt u_char term[256]; 91 1.3.2.2 yamt u_char *cp, *desc; 92 1.3.2.2 yamt int64_t minv, warnv, crit, num, den; 93 1.3.2.2 yamt u_int8_t junk[PCF8591_CHANNELS + 1]; 94 1.3.2.2 yamt envsys_data_t *sensor; 95 1.3.2.2 yamt int len, error, addr, chan, node = (int)ia->ia_cookie; 96 1.3.2.2 yamt u_int i; 97 1.3.2.2 yamt 98 1.3.2.2 yamt sc->sc_dev = self; 99 1.3.2.2 yamt if ((len = OF_getprop(node, "thermisters", term, 100 1.3.2.2 yamt sizeof(term))) < 0) { 101 1.3.2.2 yamt aprint_error(": couldn't find \"thermisters\" property\n"); 102 1.3.2.2 yamt return; 103 1.3.2.2 yamt } 104 1.3.2.2 yamt 105 1.3.2.2 yamt if (OF_getprop(node, "cpu-temp-factors", &sc->sc_cpu_xlate[2], 106 1.3.2.2 yamt sizeof(sc->sc_cpu_xlate) - 2) < 0) { 107 1.3.2.2 yamt aprint_error(": couldn't find \"cpu-temp-factors\" property\n"); 108 1.3.2.2 yamt return; 109 1.3.2.2 yamt } 110 1.3.2.2 yamt sc->sc_cpu_xlate[0] = sc->sc_cpu_xlate[1] = sc->sc_cpu_xlate[2]; 111 1.3.2.2 yamt 112 1.3.2.2 yamt /* Only the Sun Enterprise 450 has these. */ 113 1.3.2.2 yamt OF_getprop(node, "ps-temp-factors", &sc->sc_ps_xlate[2], 114 1.3.2.2 yamt sizeof(sc->sc_ps_xlate) - 2); 115 1.3.2.2 yamt sc->sc_ps_xlate[0] = sc->sc_ps_xlate[1] = sc->sc_ps_xlate[2]; 116 1.3.2.2 yamt 117 1.3.2.2 yamt cp = term; 118 1.3.2.2 yamt while (cp < term + len) { 119 1.3.2.2 yamt addr = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 120 1.3.2.2 yamt chan = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 121 1.3.2.2 yamt minv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 122 1.3.2.2 yamt warnv = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 123 1.3.2.2 yamt crit = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 124 1.3.2.2 yamt num = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 125 1.3.2.2 yamt den = cp[0] << 24 | cp[1] << 16 | cp[2] << 8 | cp[3]; cp += 4; 126 1.3.2.2 yamt desc = cp; 127 1.3.2.2 yamt while (cp < term + len && *cp++); 128 1.3.2.2 yamt 129 1.3.2.2 yamt if (addr != (ia->ia_addr << 1)) 130 1.3.2.2 yamt continue; 131 1.3.2.2 yamt 132 1.3.2.2 yamt if (num == 0 || den == 0) 133 1.3.2.2 yamt num = den = 1; 134 1.3.2.2 yamt 135 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_num = chan; 136 1.3.2.2 yamt 137 1.3.2.2 yamt sensor = &sc->sc_channels[sc->sc_nchan].chan_sensor; 138 1.3.2.2 yamt sensor->units = ENVSYS_STEMP; 139 1.3.2.2 yamt sensor->flags |= ENVSYS_FMONLIMITS | ENVSYS_FMONNOTSUPP; 140 1.3.2.2 yamt strlcpy(sensor->desc, desc, sizeof(sensor->desc)); 141 1.3.2.2 yamt 142 1.3.2.2 yamt if (strncmp(desc, "CPU", 3) == 0) 143 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_xlate = 144 1.3.2.2 yamt sc->sc_cpu_xlate; 145 1.3.2.2 yamt else if (strncmp(desc, "PS", 2) == 0) 146 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_xlate = 147 1.3.2.2 yamt sc->sc_ps_xlate; 148 1.3.2.2 yamt else 149 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_factor = 150 1.3.2.2 yamt (1000000 * num) / den; 151 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_min = 152 1.3.2.2 yamt 273150000 + 1000000 * minv; 153 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_warn = 154 1.3.2.2 yamt 273150000 + 1000000 * warnv; 155 1.3.2.2 yamt sc->sc_channels[sc->sc_nchan].chan_crit = 156 1.3.2.2 yamt 273150000 + 1000000 * crit; 157 1.3.2.2 yamt sc->sc_nchan++; 158 1.3.2.2 yamt } 159 1.3.2.2 yamt 160 1.3.2.2 yamt sc->sc_tag = ia->ia_tag; 161 1.3.2.2 yamt sc->sc_addr = ia->ia_addr; 162 1.3.2.2 yamt 163 1.3.2.2 yamt iic_acquire_bus(sc->sc_tag, 0); 164 1.3.2.2 yamt 165 1.3.2.2 yamt /* Try a read now, so we can fail if it doesn't work */ 166 1.3.2.2 yamt if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 167 1.3.2.2 yamt NULL, 0, junk, sc->sc_nchan + 1, 0)) { 168 1.3.2.2 yamt aprint_error(": read failed\n"); 169 1.3.2.2 yamt iic_release_bus(sc->sc_tag, 0); 170 1.3.2.2 yamt return; 171 1.3.2.2 yamt } 172 1.3.2.2 yamt 173 1.3.2.2 yamt iic_release_bus(sc->sc_tag, 0); 174 1.3.2.2 yamt 175 1.3.2.2 yamt /* Hook us into the sysmon_envsys subsystem */ 176 1.3.2.2 yamt sc->sc_sme = sysmon_envsys_create(); 177 1.3.2.2 yamt sc->sc_sme->sme_name = device_xname(self); 178 1.3.2.2 yamt sc->sc_sme->sme_cookie = sc; 179 1.3.2.2 yamt sc->sc_sme->sme_refresh = ecadc_refresh; 180 1.3.2.2 yamt sc->sc_sme->sme_get_limits = ecadc_get_limits; 181 1.3.2.2 yamt 182 1.3.2.2 yamt /* Initialize sensor data. */ 183 1.3.2.2 yamt for (i = 0; i < sc->sc_nchan; i++) 184 1.3.2.2 yamt sysmon_envsys_sensor_attach(sc->sc_sme, 185 1.3.2.2 yamt &sc->sc_channels[i].chan_sensor); 186 1.3.2.2 yamt 187 1.3.2.2 yamt error = sysmon_envsys_register(sc->sc_sme); 188 1.3.2.2 yamt if (error) { 189 1.3.2.2 yamt aprint_error_dev(self, "error %d registering with sysmon\n", 190 1.3.2.2 yamt error); 191 1.3.2.2 yamt sysmon_envsys_destroy(sc->sc_sme); 192 1.3.2.2 yamt return; 193 1.3.2.2 yamt } 194 1.3.2.2 yamt 195 1.3.2.2 yamt aprint_naive(": Temp Sensors\n"); 196 1.3.2.2 yamt aprint_normal(": %s Temp Sensors\n", ia->ia_name); 197 1.3.2.2 yamt } 198 1.3.2.2 yamt 199 1.3.2.2 yamt static void 200 1.3.2.2 yamt ecadc_refresh(struct sysmon_envsys *sme, envsys_data_t *sensor) 201 1.3.2.2 yamt { 202 1.3.2.2 yamt struct ecadc_softc *sc = sme->sme_cookie; 203 1.3.2.2 yamt u_int i; 204 1.3.2.2 yamt u_int8_t data[PCF8591_CHANNELS + 1]; 205 1.3.2.2 yamt u_int8_t ctrl = PCF8591_CTRL_CH0 | PCF8591_CTRL_AUTOINC | 206 1.3.2.2 yamt PCF8591_CTRL_OSCILLATOR; 207 1.3.2.2 yamt 208 1.3.2.2 yamt iic_acquire_bus(sc->sc_tag, 0); 209 1.3.2.2 yamt if (iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP, sc->sc_addr, 210 1.3.2.2 yamt &ctrl, 1, NULL, 0, 0)) { 211 1.3.2.2 yamt iic_release_bus(sc->sc_tag, 0); 212 1.3.2.2 yamt return; 213 1.3.2.2 yamt } 214 1.3.2.2 yamt /* NB: first byte out is stale, so read num_channels + 1 */ 215 1.3.2.2 yamt if (iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP, sc->sc_addr, 216 1.3.2.2 yamt NULL, 0, data, PCF8591_CHANNELS + 1, 0)) { 217 1.3.2.2 yamt iic_release_bus(sc->sc_tag, 0); 218 1.3.2.2 yamt return; 219 1.3.2.2 yamt } 220 1.3.2.2 yamt iic_release_bus(sc->sc_tag, 0); 221 1.3.2.2 yamt 222 1.3.2.2 yamt /* We only support temperature channels. */ 223 1.3.2.2 yamt for (i = 0; i < sc->sc_nchan; i++) { 224 1.3.2.2 yamt struct ecadc_channel *chp = &sc->sc_channels[i]; 225 1.3.2.2 yamt 226 1.3.2.2 yamt if (chp->chan_xlate) 227 1.3.2.2 yamt chp->chan_sensor.value_cur = 273150000 + 1000000 * 228 1.3.2.2 yamt chp->chan_xlate[data[1 + chp->chan_num]]; 229 1.3.2.2 yamt else 230 1.3.2.2 yamt chp->chan_sensor.value_cur = 273150000 + 231 1.3.2.2 yamt chp->chan_factor * data[1 + chp->chan_num]; 232 1.3.2.2 yamt 233 1.3.2.2 yamt chp->chan_sensor.state = ENVSYS_SVALID; 234 1.3.2.2 yamt chp->chan_sensor.flags &= ~ENVSYS_FNEED_REFRESH; 235 1.3.2.2 yamt chp->chan_sensor.flags |= ENVSYS_FMONLIMITS; 236 1.3.2.2 yamt } 237 1.3.2.2 yamt } 238 1.3.2.2 yamt 239 1.3.2.2 yamt static void 240 1.3.2.2 yamt ecadc_get_limits(struct sysmon_envsys *sme, envsys_data_t *edata, 241 1.3.2.2 yamt sysmon_envsys_lim_t *limits, uint32_t *props) 242 1.3.2.2 yamt { 243 1.3.2.2 yamt struct ecadc_softc *sc = sme->sme_cookie; 244 1.3.2.2 yamt int i; 245 1.3.2.2 yamt 246 1.3.2.2 yamt for (i = 0; i < sc->sc_nchan; i++) { 247 1.3.2.2 yamt if (edata != &sc->sc_channels[i].chan_sensor) 248 1.3.2.2 yamt continue; 249 1.3.2.2 yamt *props |= PROP_WARNMIN|PROP_WARNMAX|PROP_CRITMAX; 250 1.3.2.2 yamt limits->sel_warnmin = sc->sc_channels[i].chan_min; 251 1.3.2.2 yamt limits->sel_warnmax = sc->sc_channels[i].chan_warn; 252 1.3.2.2 yamt limits->sel_critmax = sc->sc_channels[i].chan_crit; 253 1.3.2.2 yamt return; 254 1.3.2.2 yamt } 255 1.3.2.2 yamt } 256
Indexes created Thu Oct 02 14:10:14 GMT 2025