Support LM77 Temperature.
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kiyohara
parent
dbbc553deb
commit
43911ef4e2
@ -1,4 +1,4 @@
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/* $NetBSD: lm75.c,v 1.8 2006/05/05 18:04:42 thorpej Exp $ */
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/* $NetBSD: lm75.c,v 1.9 2006/05/17 00:10:54 kiyohara Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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@ -49,12 +49,13 @@ struct lmtemp_softc {
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struct device sc_dev;
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i2c_tag_t sc_tag;
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int sc_address;
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int sc_is_ds75;
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struct envsys_tre_data sc_sensor[1];
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struct envsys_basic_info sc_info[1];
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struct sysmon_envsys sc_sysmon;
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uint32_t (*sc_lmtemp_decode)(const uint8_t *);
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};
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static int lmtemp_match(struct device *, struct cfdata *, void *);
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@ -76,13 +77,45 @@ static const struct envsys_range lmtemp_ranges[] = {
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static int lmtemp_config_write(struct lmtemp_softc *, uint8_t);
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static uint32_t lmtemp_decode_lm75(const uint8_t *);
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static uint32_t lmtemp_decode_ds75(const uint8_t *);
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static uint32_t lmtemp_decode_lm77(const uint8_t *);
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enum {
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lmtemp_lm75 = 0,
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lmtemp_ds75,
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lmtemp_lm77,
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};
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static const struct {
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int lmtemp_type;
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const char *lmtemp_name;
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int lmtemp_addrmask;
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int lmtemp_addr;
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uint32_t (*lmtemp_decode)(const uint8_t *);
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} lmtemptbl[] = {
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{ lmtemp_lm75, "LM75",
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LM75_ADDRMASK, LM75_ADDR, lmtemp_decode_lm75 },
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{ lmtemp_ds75, "DS75",
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LM75_ADDRMASK, LM75_ADDR, lmtemp_decode_ds75 },
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{ lmtemp_lm77, "LM77",
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LM77_ADDRMASK, LM77_ADDR, lmtemp_decode_lm77 },
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{ -1, NULL,
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0, 0, NULL }
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};
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static int
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lmtemp_match(struct device *parent, struct cfdata *cf, void *aux)
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{
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struct i2c_attach_args *ia = aux;
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int i;
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if ((ia->ia_addr & LM75_ADDRMASK) == LM75_ADDR)
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for (i = 0; lmtemptbl[i].lmtemp_type != -1 ; i++)
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if (lmtemptbl[i].lmtemp_type == cf->cf_flags)
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break;
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if (lmtemptbl[i].lmtemp_type == -1)
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return (0);
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if ((ia->ia_addr & lmtemptbl[i].lmtemp_addrmask) ==
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lmtemptbl[i].lmtemp_addr)
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return (1);
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return (0);
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@ -94,14 +127,18 @@ lmtemp_attach(struct device *parent, struct device *self, void *aux)
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struct lmtemp_softc *sc = device_private(self);
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struct i2c_attach_args *ia = aux;
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prop_string_t desc;
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int i;
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for (i = 0; lmtemptbl[i].lmtemp_type != -1 ; i++)
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if (lmtemptbl[i].lmtemp_type ==
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device_cfdata(&sc->sc_dev)->cf_flags)
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break;
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sc->sc_tag = ia->ia_tag;
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sc->sc_address = ia->ia_addr;
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sc->sc_is_ds75 = device_cfdata(&sc->sc_dev)->cf_flags & 1;
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aprint_naive(": Temperature Sensor\n");
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aprint_normal(": %s Temperature Sensor\n",
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(sc->sc_is_ds75) ? "DS75" : "LM75");
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aprint_normal(": %s Temperature Sensor\n", lmtemptbl[i].lmtemp_name);
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/* Set the configuration of the LM75 to defaults. */
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iic_acquire_bus(sc->sc_tag, I2C_F_POLL);
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@ -129,6 +166,8 @@ lmtemp_attach(struct device *parent, struct device *self, void *aux)
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else
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strcpy(sc->sc_info[0].desc, sc->sc_dev.dv_xname);
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sc->sc_lmtemp_decode = lmtemptbl[i].lmtemp_decode;
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/* Hook into system monitor. */
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sc->sc_sysmon.sme_ranges = lmtemp_ranges;
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sc->sc_sysmon.sme_sensor_info = sc->sc_info;
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@ -172,11 +211,7 @@ lmtemp_temp_read(struct lmtemp_softc *sc, uint8_t which, uint32_t *valp)
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if (error)
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return (error);
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if (sc->sc_is_ds75)
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*valp = lmtemp_decode_ds75(buf);
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else
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*valp = lmtemp_decode_lm75(buf);
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*valp = sc->sc_lmtemp_decode(buf);
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return (0);
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}
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@ -279,3 +314,23 @@ lmtemp_decode_ds75(const uint8_t *buf)
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return (temp * 62500 + 273150000);
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}
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static uint32_t
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lmtemp_decode_lm77(const uint8_t *buf)
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{
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int temp;
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uint32_t val;
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/*
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* Describe each bits of temperature registers on LM77.
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* D15 - D12: Sign
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* D11 - D3 : Bit8(MSB) - Bit0
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*/
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temp = (int8_t)buf[0];
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temp = (temp << 5) | (buf[1] >> 3);
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/* Temp is given in 1/2 deg. C, we convert to uK. */
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val = temp * 500000 + 273150000;
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return (val);
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}
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@ -1,4 +1,4 @@
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/* $NetBSD: lm75reg.h,v 1.2 2005/12/11 12:21:22 christos Exp $ */
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/* $NetBSD: lm75reg.h,v 1.3 2006/05/17 00:10:54 kiyohara Exp $ */
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/*
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* Copyright (c) 2003 Wasabi Systems, Inc.
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@ -45,6 +45,8 @@
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*/
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#define LM75_ADDRMASK 0x78
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#define LM75_ADDR 0x48
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#define LM77_ADDRMASK 0x7c
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#define LM77_ADDR 0x48
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/*
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* Temperature on the LM75 is represented by a 9-bit two's complement
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@ -65,6 +67,11 @@
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#define LM75_REG_THYST_SET_POINT 0x02
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#define LM75_REG_TOS_SET_POINT 0x03
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#define LM77_REG_TCRIT_SET_POINT 0x03
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#define LM77_REG_TLOW_SET_POINT 0x04
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#define LM77_REG_THIGH_SET_POINT 0x05
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#define LM75_TEMP_LEN 2 /* 2 data bytes */
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#define LM75_CONFIG_SHUTDOWN 0x01
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@ -75,4 +82,8 @@
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#define LM75_CONFIG_FAULT_QUEUE_4 (2 << 3)
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#define LM75_CONFIG_FAULT_QUEUE_6 (3 << 3)
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#define LM77_CONFIG_TCRITAPOLARITY 0x04
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#define LM77_CONFIG_INTPOLARITY 0x08
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#define LM77_CONFIG_FAULT_QUEUE LM75_CONFIG_FAULT_QUEUE_4
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#endif /* _DEV_I2C_LM75REG_H_ */
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