wbng(4) driver for Winbond W83793G Hardware Monitor; 'commit it' deraadt

1 files changed, 293 insertions, 0 deletions

diff --git a/sys/dev/i2c/w83793g.c b/sys/dev/i2c/w83793g.c
new file mode 100644
index 00000000000..6a515671b7f
--- /dev/null
+++ b/sys/dev/i2c/w83793g.c
@@ -0,0 +1,293 @@
+/*	$OpenBSD: w83793g.c,v 1.1 2007/10/14 14:10:07 cnst Exp $	*/

+

+/*

+ * Copyright (c) 2007 Constantine A. Murenin <cnst+openbsd@bugmail.mojo.ru>

+ *

+ * Permission to use, copy, modify, and distribute this software for any

+ * purpose with or without fee is hereby granted, provided that the above

+ * copyright notice and this permission notice appear in all copies.

+ *

+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES

+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF

+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR

+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES

+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN

+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF

+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.

+ */

+

+#include <sys/param.h>

+#include <sys/systm.h>

+#include <sys/device.h>

+#include <sys/sensors.h>

+

+#include <dev/i2c/i2cvar.h>

+

+/* Winbond W83793G Hardware Monitor */

+

+#define WB_BANKSELECT	0x00

+

+/* Voltage */

+#define WB_NUM_VOLTS	10

+

+static const char *wb_volt_desc[WB_NUM_VOLTS] = {

+	"VCore", "VCore", "VTT",

+	"", "", "3.3V", "12V", "5VDD", "5VSB", "VBat"

+};

+

+#define WB_VCOREA	0x10

+#define WB_VCOREB	0x11

+#define WB_VTT		0x12

+#define WB_VLOW		0x1b

+

+#define WB_VSENS1	0x14

+#define WB_VSENS2	0x15

+#define WB_3VSEN	0x16

+#define WB_12VSEN	0x17

+#define WB_5VDD		0x18

+#define WB_5VSB		0x19

+#define WB_VBAT		0x1a

+

+/* Temperature */

+#define WB_NUM_TEMPS	6

+

+#define WB_TD_COUNT	4

+#define WB_TD_START	0x1c

+#define WB_TDLOW	0x22

+

+#define WB_TR_COUNT	2

+#define WB_TR_START	0x20

+

+/* Fan */

+#define WB_NUM_FANS	12

+#define WB_FAN_START	0x23

+

+

+struct wbng_softc {

+	struct device	sc_dev;

+	i2c_tag_t	sc_tag;

+	i2c_addr_t	sc_addr;

+

+	struct ksensor	sc_sensors[WB_NUM_VOLTS + WB_NUM_TEMPS + WB_NUM_FANS];

+	struct ksensordev sc_sensordev;

+};

+

+

+int	wbng_match(struct device *, void *, void *);

+void	wbng_attach(struct device *, struct device *, void *);

+void	wbng_refresh(void *);

+

+void	wbng_refresh_volts(struct wbng_softc *);

+void	wbng_refresh_temps(struct wbng_softc *);

+void	wbng_refresh_fans(struct wbng_softc *);

+

+uint8_t	wbng_readreg(struct wbng_softc *, uint8_t);

+void	wbng_writereg(struct wbng_softc *, uint8_t, uint8_t);

+

+

+struct cfattach wbng_ca = {

+	sizeof(struct wbng_softc), wbng_match, wbng_attach

+};

+

+struct cfdriver wbng_cd = {

+	NULL, "wbng", DV_DULL

+};

+

+

+int

+wbng_match(struct device *parent, void *match, void *aux)

+{

+	struct i2c_attach_args *ia = aux;

+

+	if (strcmp(ia->ia_name, "w83793g") == 0)

+		return 1;

+	return 0;

+}

+

+void

+wbng_attach(struct device *parent, struct device *self, void *aux)

+{

+	struct wbng_softc *sc = (struct wbng_softc *)self;

+	struct i2c_attach_args *ia = aux;

+	int i, j;

+

+	sc->sc_tag = ia->ia_tag;

+	sc->sc_addr = ia->ia_addr;

+

+	printf(": %s", ia->ia_name);

+

+	strlcpy(sc->sc_sensordev.xname, sc->sc_dev.dv_xname,

+	    sizeof(sc->sc_sensordev.xname));

+

+	for (i = 0; i < WB_NUM_VOLTS; i++) {

+		strlcpy(sc->sc_sensors[i].desc, wb_volt_desc[i],

+		    sizeof(sc->sc_sensors[i].desc));

+		sc->sc_sensors[i].type = SENSOR_VOLTS_DC;

+	}

+

+	for (j = i + WB_NUM_TEMPS; i < j; i++)

+		sc->sc_sensors[i].type = SENSOR_TEMP;

+

+	for (j = i + WB_NUM_FANS; i < j; i++)

+		sc->sc_sensors[i].type = SENSOR_FANRPM;

+

+	for (i = 0; i < WB_NUM_VOLTS + WB_NUM_TEMPS + WB_NUM_FANS; i++)

+		sensor_attach(&sc->sc_sensordev, &sc->sc_sensors[i]);

+

+	if (sensor_task_register(sc, wbng_refresh, 5) == NULL) {

+		printf(", unable to register the update task\n");

+		return;

+	}

+

+	sensordev_install(&sc->sc_sensordev);

+	printf("\n");

+}

+

+void

+wbng_refresh(void *arg)

+{

+	struct wbng_softc *sc = arg;

+	uint8_t bsr;

+

+	iic_acquire_bus(sc->sc_tag, 0);

+

+	bsr = wbng_readreg(sc, WB_BANKSELECT);

+	if ((bsr & 0x07) != 0x0)

+		wbng_writereg(sc, WB_BANKSELECT, bsr & 0xf8);

+

+	wbng_refresh_volts(sc);

+	wbng_refresh_temps(sc);

+	wbng_refresh_fans(sc);

+

+	if ((bsr & 0x07) != 0x0)

+		wbng_writereg(sc, WB_BANKSELECT, bsr);

+

+	iic_release_bus(sc->sc_tag, 0);

+}

+

+void

+wbng_refresh_volts(struct wbng_softc *sc)

+{

+	struct ksensor *s = &sc->sc_sensors[0];

+	uint8_t	vlow, data;

+

+	/* high precision voltage sensors */

+

+	vlow = wbng_readreg(sc, WB_VLOW);

+

+	data = wbng_readreg(sc, WB_VCOREA);

+	s[0].value = ((data << 3) | (((vlow & 0x03)) << 1)) * 1000;

+

+	data = wbng_readreg(sc, WB_VCOREB);

+	s[1].value = ((data << 3) | (((vlow & 0x0c) >> 2) << 1)) * 1000;

+

+	data = wbng_readreg(sc, WB_VTT);

+	s[2].value = ((data << 3) | (((vlow & 0x30) >> 4) << 1)) * 1000;

+

+	/* low precision voltage sensors */

+

+	data = wbng_readreg(sc, WB_VSENS1);

+	s[3].value = (data << 4) * 1000;

+

+	data = wbng_readreg(sc, WB_VSENS2);

+	s[4].value = (data << 4) * 1000;

+

+	data = wbng_readreg(sc, WB_3VSEN);

+	s[5].value = (data << 4) * 1000;

+

+	data = wbng_readreg(sc, WB_12VSEN);

+	s[6].value = (data << 4) * 6100;	/*XXX, the factor is a guess */

+

+	data = wbng_readreg(sc, WB_5VDD);

+	s[7].value = (data << 4) * 1500 + 150000;

+

+	data = wbng_readreg(sc, WB_5VSB);

+	s[8].value = (data << 4) * 1500 + 150000;

+

+	data = wbng_readreg(sc, WB_VBAT);

+	s[9].value = (data << 4) * 1000;

+}

+

+void

+wbng_refresh_temps(struct wbng_softc *sc)

+{

+	struct ksensor *s = &sc->sc_sensors[WB_NUM_VOLTS];

+	int data, i;

+	uint8_t	tdlow, low;

+

+	/* high precision temperature sensors */

+	tdlow = wbng_readreg(sc, WB_TDLOW);

+	for (i = 0; i < WB_TD_COUNT; i++) {

+		data = wbng_readreg(sc, WB_TD_START + i);

+		/*

+		 * XXX: datasheet says nothing about acceptable values,

+		 * let's consider only values between -55 degC and +125 degC.

+		 */

+		if (data > 0x7f && data < 0xc9) {

+			s[i].flags |= SENSOR_FINVALID;

+			s[i].value = 0;

+			continue;

+		}

+		if (data & 0x80)

+			data -= 0x100;

+		low = (tdlow & (0x03 << (i * 2))) >> (i * 2);

+		s[i].value = data * 1000000 + low * 250000 + 273150000;

+	}

+	s += i;

+

+	/* low precision temperature sensors */

+	for (i = 0; i < WB_TR_COUNT; i++) {

+		data = wbng_readreg(sc, WB_TR_START + i);

+		/*

+		 * XXX: datasheet says nothing about acceptable values,

+		 * let's consider only values between -55 degC and +125 degC.

+		 */

+		if (data > 0x7f && data < 0xc9) {

+			s[i].flags |= SENSOR_FINVALID;

+			s[i].value = 0;

+			continue;

+		}

+		if (data & 0x80)

+			data -= 0x100;

+		s[i].value = data * 1000000 + 273150000;

+	}

+}

+

+void

+wbng_refresh_fans(struct wbng_softc *sc)

+{

+	struct ksensor *s = &sc->sc_sensors[WB_NUM_VOLTS + WB_NUM_TEMPS];

+	int i;

+

+	for (i = 0; i < WB_NUM_FANS; i++) {

+		uint8_t h = wbng_readreg(sc, WB_FAN_START + i * 2);

+		uint8_t l = wbng_readreg(sc, WB_FAN_START + i * 2 + 1);

+		uint16_t b = h << 8 | l;

+

+		if (b == 0x0f00 || b == 0x0000) {

+			s[i].flags |= SENSOR_FINVALID;

+			s[i].value = 0;

+		} else {

+			s[i].flags &= ~SENSOR_FINVALID;

+			s[i].value = 1350000 / b;

+		}

+	}

+}

+

+uint8_t

+wbng_readreg(struct wbng_softc *sc, uint8_t reg)

+{

+	uint8_t data;

+

+	iic_exec(sc->sc_tag, I2C_OP_READ_WITH_STOP,

+	    sc->sc_addr, &reg, sizeof reg, &data, sizeof data, 0);

+

+	return data;

+}

+

+void

+wbng_writereg(struct wbng_softc *sc, uint8_t reg, uint8_t data)

+{

+	iic_exec(sc->sc_tag, I2C_OP_WRITE_WITH_STOP,

+	    sc->sc_addr, &reg, sizeof reg, &data, sizeof data, 0);

+}