1 /* $NetBSD: psoc.c,v 1.9 2025/09/17 14:15:59 thorpej Exp $ */ 2 3 /*- 4 * Copyright (c) 2019 Michael Lorenz 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 /* 30 * fan controller found in 1GHz TiBook 31 * 32 * register values from OF: 33 * fan1 - 0x20 ( status ), 0x31 ( data ) 34 * fan2 - 0x26 ( status ), 0x45 ( data ) 35 * fan status byte 0: 36 * 0x5* - fan is running, 0x6* - fan stopped 37 * byte 1: unknown, 0x80 seems always set, lower bits seem to fluctuate 38 * byte 2: lower 6 bit seem to indicate speed 39 * fan speed may be lower 6 bit of byte 2 and lower 6 of byte 1 40 * temperature sensors start at 6, two bytes each, first appears to be 41 * the temperature in degrees Celsius 42 */ 43 44 #include <sys/cdefs.h> 45 __KERNEL_RCSID(0, "$NetBSD: psoc.c,v 1.9 2025/09/17 14:15:59 thorpej Exp $"); 46 47 #include <sys/param.h> 48 #include <sys/systm.h> 49 #include <sys/device.h> 50 #include <sys/conf.h> 51 #include <sys/bus.h> 52 #include <sys/time.h> 53 54 #include <dev/ofw/openfirm.h> 55 56 #include <dev/i2c/i2cvar.h> 57 58 #include <dev/sysmon/sysmonvar.h> 59 60 #include "opt_psoc.h" 61 #ifdef PSOC_DEBUG 62 #define DPRINTF printf 63 #else 64 #define DPRINTF if (0) printf 65 #endif 66 67 struct psoc_softc { 68 device_t sc_dev; 69 i2c_tag_t sc_i2c; 70 i2c_addr_t sc_addr; 71 int sc_node; 72 73 struct sysmon_envsys *sc_sme; 74 envsys_data_t sc_sensors[7]; 75 int sc_nsensors; 76 uint8_t sc_temp[16]; 77 time_t sc_last; 78 }; 79 80 static int psoc_match(device_t, cfdata_t, void *); 81 static void psoc_attach(device_t, device_t, void *); 82 83 static void psoc_sensors_refresh(struct sysmon_envsys *, envsys_data_t *); 84 85 static void psoc_dump(struct psoc_softc *); 86 87 CFATTACH_DECL_NEW(psoc, sizeof(struct psoc_softc), 88 psoc_match, psoc_attach, NULL, NULL); 89 90 static const struct device_compatible_entry compat_data[] = { 91 { .compat = "Psoc" }, 92 DEVICE_COMPAT_EOL 93 }; 94 95 static int 96 psoc_match(device_t parent, cfdata_t match, void *aux) 97 { 98 struct i2c_attach_args *ia = aux; 99 int match_result; 100 101 if (iic_use_direct_match(ia, match, compat_data, &match_result)) 102 return match_result; 103 104 return 0; 105 } 106 107 static void 108 psoc_attach(device_t parent, device_t self, void *aux) 109 { 110 struct psoc_softc *sc = device_private(self); 111 struct i2c_attach_args *ia = aux; 112 char path[256]; 113 envsys_data_t *s; 114 int error, ih, r, i; 115 116 sc->sc_dev = self; 117 sc->sc_i2c = ia->ia_tag; 118 sc->sc_addr = ia->ia_addr; 119 sc->sc_node = devhandle_to_of(device_handle(self)); 120 sc->sc_last = 0; 121 122 aprint_naive("\n"); 123 aprint_normal(": Psoc fan controller\n"); 124 125 error = OF_package_to_path(sc->sc_node, path, 256); 126 path[error] = 0; 127 DPRINTF("path [%s]\n", path); 128 ih = OF_open("fan"); 129 OF_call_method_1("fan-init", ih, 0); 130 DPRINTF("ih %08x\n", ih); 131 132 sc->sc_sme = sysmon_envsys_create(); 133 sc->sc_sme->sme_name = device_xname(self); 134 sc->sc_sme->sme_cookie = sc; 135 sc->sc_sme->sme_refresh = psoc_sensors_refresh; 136 sc->sc_nsensors = 0; 137 138 psoc_dump(sc); 139 140 for (i = 0; i < 4; i++) { 141 r = i * 2 + 6; 142 s = &sc->sc_sensors[sc->sc_nsensors]; 143 s->state = ENVSYS_SINVALID; 144 s->units = ENVSYS_STEMP; 145 snprintf(s->desc, 16, "temp%d", i); 146 s->private = r; 147 sysmon_envsys_sensor_attach(sc->sc_sme, s); 148 sc->sc_nsensors++; 149 } 150 151 for (r = 0x20; r < 0x2b; r += 0x06) { 152 s = &sc->sc_sensors[sc->sc_nsensors]; 153 s->state = ENVSYS_SINVALID; 154 s->units = ENVSYS_SFANRPM; 155 snprintf(s->desc, 16, "reg %02x", r); 156 s->private = r; 157 sysmon_envsys_sensor_attach(sc->sc_sme, s); 158 sc->sc_nsensors++; 159 } 160 161 sysmon_envsys_register(sc->sc_sme); 162 } 163 164 static void 165 psoc_sensors_refresh(struct sysmon_envsys *sme, envsys_data_t *edata) 166 { 167 struct psoc_softc *sc = sme->sme_cookie; 168 uint8_t cmd = 6; 169 uint8_t buf[0x28]; 170 int error = 1, data; 171 172 if ( edata->private < 0x20) { 173 cmd = 0; 174 if ((time_second - sc->sc_last) > 2) { 175 iic_acquire_bus(sc->sc_i2c, 0); 176 error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, 177 sc->sc_addr, &cmd, 1, sc->sc_temp, 16, 0); 178 iic_release_bus(sc->sc_i2c, 0); 179 if (error) return; 180 sc->sc_last = time_second; 181 } 182 error = 0; 183 if (edata->private > 0) { 184 data = sc->sc_temp[edata->private]; 185 /* Celsius -> microkelvin */ 186 edata->value_cur = ((int)data * 1000000) + 273150000; 187 } 188 #ifdef PSOC_DEBUG 189 if (edata->private == 6) 190 psoc_dump(sc); 191 #endif 192 } else { 193 cmd = edata->private; 194 iic_acquire_bus(sc->sc_i2c, 0); 195 error = iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, 196 sc->sc_addr, &cmd, 1, buf, 3, 0); 197 iic_release_bus(sc->sc_i2c, 0); 198 if (error) return; 199 switch (buf[0] & 0xf0) { 200 case 0x50: 201 data = buf[edata->private - 0x20]; 202 edata->value_cur = ((buf[2] & 0x3f) << 6) | 203 (buf[1] & 0x3f); 204 break; 205 case 0x60: 206 edata->value_cur = 0; 207 break; 208 default: 209 error = 0; 210 } 211 } 212 if (error) { 213 edata->state = ENVSYS_SINVALID; 214 } else { 215 edata->state = ENVSYS_SVALID; 216 } 217 } 218 219 static void 220 psoc_dump(struct psoc_softc *sc) 221 { 222 int i, j; 223 uint8_t data, cmd; 224 225 iic_acquire_bus(sc->sc_i2c, 0); 226 for (i = 0x20; i < 0x5f; i+= 8) { 227 printf("%02x:", i); 228 for (j = 0; j < 8; j++) { 229 cmd = i + j; 230 data = 0; 231 iic_exec(sc->sc_i2c, I2C_OP_READ_WITH_STOP, 232 sc->sc_addr, &cmd, 1, &data, 1, 0); 233 printf(" %02x", data); 234 } 235 printf("\n"); 236 } 237 iic_release_bus(sc->sc_i2c, 0); 238 } 239
Indexes created Sat Sep 20 22:09:52 GMT 2025