[src/trunk]: src/sys/arch/macppc/dev add support for the CPU temperature sens...

[macallan <macallan%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/a3091b7043bf
branches:  trunk
changeset: 981367:a3091b7043bf
user:      macallan <macallan%NetBSD.org@localhost>
date:      Tue Mar 09 01:17:37 2021 +0000

description:
add support for the CPU temperature sensor found in iMac G5s

diffstat:

 sys/arch/macppc/dev/smu.c |  70 ++++++++++++++++++++++++++++++++++++++++++++--
 1 files changed, 66 insertions(+), 4 deletions(-)

diffs (143 lines):

diff -r 294ba1a27714 -r a3091b7043bf sys/arch/macppc/dev/smu.c
--- a/sys/arch/macppc/dev/smu.c Tue Mar 09 00:08:04 2021 +0000
+++ b/sys/arch/macppc/dev/smu.c Tue Mar 09 01:17:37 2021 +0000
@@ -80,7 +80,7 @@
 
 #define SMU_MAX_FANS           8
 #define SMU_MAX_IICBUS         3
-#define SMU_MAX_SME_SENSORS    SMU_MAX_FANS
+#define SMU_MAX_SME_SENSORS    (SMU_MAX_FANS + 8)
 
 struct smu_zone {
        bool (*filter)(const envsys_data_t *);
@@ -120,6 +120,8 @@
 
        struct sysmon_envsys *sc_sme;
        envsys_data_t sc_sme_sensors[SMU_MAX_SME_SENSORS];
+       uint32_t cpu_m;
+       int32_t  cpu_b;
 
        struct smu_zone sc_zones[SMU_ZONES];
        lwp_t *sc_thread;
@@ -130,7 +132,7 @@
 #define SMU_CMD_RTC    0x8e
 #define SMU_CMD_I2C    0x9a
 #define SMU_CMD_POWER  0xaa
-#define SMU_ADC                0xd8
+#define SMU_CMD_ADC    0xd8
 #define SMU_MISC       0xee
 #define  SMU_MISC_GET_DATA     0x02
 #define  SMU_MISC_LED_CTRL     0x04
@@ -165,6 +167,8 @@
 static int smu_fan_update_rpm(struct smu_fan *);
 static int smu_fan_get_rpm(struct smu_fan *, int *);
 static int smu_fan_set_rpm(struct smu_fan *, int);
+static int smu_read_adc(struct smu_softc *, int);
+
 static int smu_iicbus_exec(void *, i2c_op_t, i2c_addr_t, const void *,
     size_t, void *, size_t, int);
 static int smu_sysctl_fan_rpm(SYSCTLFN_ARGS);
@@ -199,6 +203,7 @@
 {
        struct confargs *ca = aux;
        struct smu_softc *sc = device_private(self);
+       uint16_t data[4];
 
        sc->sc_dev = self;
        sc->sc_node = ca->ca_node;
@@ -227,6 +232,13 @@
        sc->sc_todr.cookie = sc;
        todr_attach(&sc->sc_todr);
 
+       /* calibration data */
+       memset(data, 0, 8);     
+       smu_get_datablock(SMU_CPUTEMP_CAL, (void *)data, 8);
+       DPRINTF("data %04x %04x %04x %04x\n", data[0], data[1], data[2], data[3]);
+       sc->cpu_m = data[2]; 
+       sc->cpu_b = (int16_t)data[3];
+
        smu_setup_sme(sc);
 
        smu_setup_zones(sc);
@@ -476,7 +488,8 @@
 {
        struct smu_fan *fan;
        envsys_data_t *sme_sensor;
-       int i;
+       int i, sensors, child, reg;
+       char loc[32], type[32];
 
        sc->sc_sme = sysmon_envsys_create();
 
@@ -494,7 +507,26 @@
                        return;
                }
        }
-
+       sensors = OF_finddevice("/smu/sensors");
+       child = OF_child(sensors);
+       while (child != 0) {
+               sme_sensor = &sc->sc_sme_sensors[i];
+               if (OF_getprop(child, "location", loc, 32) == 0) goto next;
+               if (OF_getprop(child, "device_type", type, 32) == 0) goto next;
+               if (OF_getprop(child, "reg", &reg, 4) == 0) goto next;
+               if (strcmp(type, "temp-sensor") == 0) {
+                       sme_sensor->units = ENVSYS_STEMP;
+                       sme_sensor->state = ENVSYS_SINVALID;
+                       strncpy(sme_sensor->desc, loc, sizeof(sme_sensor->desc));
+                       sme_sensor->private = reg;
+                       sysmon_envsys_sensor_attach(sc->sc_sme, sme_sensor);
+                       i++;
+                       printf("%s: %s@%x\n", loc, type, reg); 
+               }
+next:
+               child = OF_peer(child);
+       }
+                                               
        sc->sc_sme->sme_name = device_xname(sc->sc_dev);
        sc->sc_sme->sme_cookie = sc;
        sc->sc_sme->sme_refresh = smu_sme_refresh;
@@ -535,6 +567,19 @@
                        edata->value_cur = fan->current_rpm;
                        edata->state = ENVSYS_SVALID;
                }
+       } else if (edata->private > 0) {
+               /* this works only for the CPU diode */
+               int64_t r = smu_read_adc(sc, edata->private);
+               if (r != -1) {
+                       r = r * sc->cpu_m;
+                       r >>= 3;
+                       r += (int64_t)sc->cpu_b << 9;
+                       r <<= 1;
+                       r *= 15625;
+                       r /= 1024;
+                       edata->value_cur = r + 273150000;
+                       edata->state = ENVSYS_SVALID;
+               }
        }
 }
 
@@ -771,6 +816,23 @@
 }
 
 static int
+smu_read_adc(struct smu_softc *sc, int id)
+{
+       struct smu_cmd cmd;
+       int ret;
+
+       cmd.cmd = SMU_CMD_ADC;
+       cmd.len = 1;
+       cmd.data[0] = id;
+
+       ret = smu_do_cmd(sc, &cmd, 800);
+       if (ret == 0) {
+               return cmd.data[0] << 8 | cmd.data[1];
+       }
+       return -1;
+}
+
+static int
 smu_iicbus_exec(void *cookie, i2c_op_t op, i2c_addr_t addr, const void *send,
     size_t send_len, void *recv, size_t recv_len, int flags)
 {