Author: andreast
Date: Sun May 29 14:25:42 2011
New Revision: 222449
URL: http://svn.freebsd.org/changeset/base/222449
Log:
Add a new driver, the ad7417, to read temperatures and voltages on some
PowerMac's.
Approved by: nwhitehorn (mentor)
Added:
head/sys/dev/iicbus/ad7417.c (contents, props changed)
Modified:
head/sys/conf/files.powerpc
head/sys/powerpc/conf/GENERIC
head/sys/powerpc/conf/GENERIC64
head/sys/powerpc/conf/NOTES
Modified: head/sys/conf/files.powerpc
==============================================================================
--- head/sys/conf/files.powerpc Sun May 29 12:15:49 2011 (r222448)
+++ head/sys/conf/files.powerpc Sun May 29 14:25:42 2011 (r222449)
@@ -27,6 +27,7 @@ dev/cfi/cfi_bus_fdt.c optional cfi fdt
dev/fb/fb.c optional sc
dev/fdt/fdt_powerpc.c optional fdt
dev/hwpmc/hwpmc_powerpc.c optional hwpmc
+dev/iicbus/ad7417.c optional ad7417 powermac
dev/iicbus/ds1775.c optional ds1775 powermac
dev/iicbus/max6690.c optional max6690 powermac
dev/kbd/kbd.c optional sc
Added: head/sys/dev/iicbus/ad7417.c
==============================================================================
--- /dev/null 00:00:00 1970 (empty, because file is newly added)
+++ head/sys/dev/iicbus/ad7417.c Sun May 29 14:25:42 2011
(r222449)
@@ -0,0 +1,457 @@
+/*-
+ * Copyright (c) 2010 Andreas Tobler
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/cdefs.h>
+__FBSDID("$FreeBSD$");
+
+#include <sys/param.h>
+#include <sys/bus.h>
+#include <sys/systm.h>
+#include <sys/module.h>
+#include <sys/callout.h>
+#include <sys/conf.h>
+#include <sys/cpu.h>
+#include <sys/ctype.h>
+#include <sys/kernel.h>
+#include <sys/reboot.h>
+#include <sys/rman.h>
+#include <sys/sysctl.h>
+#include <sys/limits.h>
+
+#include <machine/bus.h>
+#include <machine/md_var.h>
+
+#include <dev/iicbus/iicbus.h>
+#include <dev/iicbus/iiconf.h>
+
+#include <dev/ofw/openfirm.h>
+#include <dev/ofw/ofw_bus.h>
+
+#define FCU_ZERO_C_TO_K 2732
+
+/* CPU A/B sensors, temp and adc: AD7417. */
+
+#define AD7417_TEMP 0x00
+#define AD7417_CONFIG 0x01
+#define AD7417_ADC 0x04
+#define AD7417_CONFIG2 0x05
+#define AD7417_CONFMASK 0xe0
+
+uint8_t adc741x_config;
+
+struct ad7417_sensor {
+ int id;
+ char location[32];
+ enum {
+ ADC7417_TEMP_SENSOR,
+ ADC7417_ADC_SENSOR
+ } type;
+};
+
+/* Regular bus attachment functions */
+static int ad7417_probe(device_t);
+static int ad7417_attach(device_t);
+
+/* Utility functions */
+static int ad7417_sensor_sysctl(SYSCTL_HANDLER_ARGS);
+static int ad7417_write(device_t dev, uint32_t addr, uint8_t reg,
+ uint8_t *buf, int len);
+static int ad7417_read_1(device_t dev, uint32_t addr, uint8_t reg,
+ uint8_t *data);
+static int ad7417_read_2(device_t dev, uint32_t addr, uint8_t reg,
+ uint16_t *data);
+
+struct ad7417_softc {
+ device_t sc_dev;
+ uint32_t sc_addr;
+ struct ad7417_sensor *sc_sensors;
+ int sc_nsensors;
+};
+static device_method_t ad7417_methods[] = {
+ /* Device interface */
+ DEVMETHOD(device_probe, ad7417_probe),
+ DEVMETHOD(device_attach, ad7417_attach),
+ { 0, 0 },
+};
+
+static driver_t ad7417_driver = {
+ "ad7417",
+ ad7417_methods,
+ sizeof(struct ad7417_softc)
+};
+
+static devclass_t ad7417_devclass;
+
+DRIVER_MODULE(ad7417, iicbus, ad7417_driver, ad7417_devclass, 0, 0);
+MALLOC_DEFINE(M_AD7417, "ad7417", "Supply-Monitor AD7417");
+
+
+static int
+ad7417_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff, int len)
+{
+ unsigned char buf[4];
+ struct iic_msg msg[] = {
+ { addr, IIC_M_WR, 0, buf }
+ };
+
+ msg[0].len = len + 1;
+ buf[0] = reg;
+ memcpy(buf + 1, buff, len);
+
+ if (iicbus_transfer(dev, msg, 1) != 0) {
+ device_printf(dev, "iicbus write failed\n");
+ return (EIO);
+ }
+
+ return (0);
+
+}
+
+static int
+ad7417_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data)
+{
+ uint8_t buf[4];
+
+ struct iic_msg msg[2] = {
+ { addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® },
+ { addr, IIC_M_RD, 1, buf },
+ };
+
+ if (iicbus_transfer(dev, msg, 2) != 0) {
+ device_printf(dev, "iicbus read failed\n");
+ return (EIO);
+ }
+
+ *data = *((uint8_t*)buf);
+
+ return (0);
+}
+
+static int
+ad7417_read_2(device_t dev, uint32_t addr, uint8_t reg, uint16_t *data)
+{
+ uint8_t buf[4];
+
+ struct iic_msg msg[2] = {
+ { addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® },
+ { addr, IIC_M_RD, 2, buf },
+ };
+
+ if (iicbus_transfer(dev, msg, 2) != 0) {
+ device_printf(dev, "iicbus read failed\n");
+ return (EIO);
+ }
+
+ *data = *((uint16_t*)buf);
+
+ return (0);
+}
+
+static int
+ad7417_init_adc(device_t dev, uint32_t addr)
+{
+ uint8_t buf;
+
+ adc741x_config = 0;
+ /* Clear Config2 */
+ buf = 0;
+ ad7417_write(dev, addr, AD7417_CONFIG2, &buf, 1);
+
+ /* Read & cache Config1 */
+ buf = 0;
+ ad7417_write(dev, addr, AD7417_CONFIG, &buf, 1);
+
+ ad7417_read_1(dev, addr, AD7417_CONFIG, &buf);
+ adc741x_config = (uint8_t)buf;
+
+ /* Disable shutdown mode */
+ adc741x_config &= 0xfe;
+ buf = adc741x_config;
+ ad7417_write(dev, addr, AD7417_CONFIG, &buf, 1);
+
+ return (0);
+
+}
+static int
+ad7417_probe(device_t dev)
+{
+ const char *name, *compatible;
+ struct ad7417_softc *sc;
+
+ name = ofw_bus_get_name(dev);
+ compatible = ofw_bus_get_compat(dev);
+
+ if (!name)
+ return (ENXIO);
+
+ if (strcmp(name, "supply-monitor") != 0 ||
+ strcmp(compatible, "ad7417") != 0)
+ return (ENXIO);
+
+ sc = device_get_softc(dev);
+ sc->sc_dev = dev;
+ sc->sc_addr = iicbus_get_addr(dev);
+
+ device_set_desc(dev, "Supply-Monitor AD7417");
+
+ return (0);
+}
+
+/*
+ * This function returns the number of sensors. If we call it the second time
+ * and we have allocated memory for sc->sc_sensors, we fill in the properties.
+ */
+static int
+ad7417_fill_sensor_prop(device_t dev)
+{
+ phandle_t child;
+ struct ad7417_softc *sc;
+ u_int id[10];
+ char location[96];
+ char type[32];
+ int i = 0, j, len = 0, prop_len, prev_len = 0;
+
+ sc = device_get_softc(dev);
+
+ child = ofw_bus_get_node(dev);
+
+ /* Fill the sensor location property. */
+ prop_len = OF_getprop(child, "hwsensor-location", location,
+ sizeof(location));
+ while (len < prop_len) {
+ if (sc->sc_sensors != NULL)
+ strcpy(sc->sc_sensors[i].location, location + len);
+ prev_len = strlen(location + len) + 1;
+ len += prev_len;
+ i++;
+ }
+ if (sc->sc_sensors == NULL)
+ return (i);
+
+ /* Fill the fan type property. */
+ len = 0;
+ i = 0;
+ prev_len = 0;
+ prop_len = OF_getprop(child, "hwsensor-type", type, sizeof(type));
+ while (len < prop_len) {
+ if (strcmp(type + len, "temperature") == 0)
+ sc->sc_sensors[i].type = ADC7417_TEMP_SENSOR;
+ else
+ sc->sc_sensors[i].type = ADC7417_ADC_SENSOR;
+ prev_len = strlen(type + len) + 1;
+ len += prev_len;
+ i++;
+ }
+
+ /* Fill the sensor id property. Taken from OF. */
+ prop_len = OF_getprop(child, "hwsensor-id", id, sizeof(id));
+ for (j = 0; j < i; j++)
+ sc->sc_sensors[j].id = id[j];
+
+ return (i);
+}
+
+static int
+ad7417_attach(device_t dev)
+{
+ struct ad7417_softc *sc;
+ struct sysctl_oid *oid, *sensroot_oid;
+ struct sysctl_ctx_list *ctx;
+ char sysctl_name[32];
+ int i, j;
+ const char *unit;
+ const char *desc;
+
+ sc = device_get_softc(dev);
+
+ sc->sc_nsensors = 0;
+
+ /* Count the actual number of sensors. */
+ sc->sc_nsensors = ad7417_fill_sensor_prop(dev);
+
+ device_printf(dev, "%d sensors detected.\n", sc->sc_nsensors);
+
+ if (sc->sc_nsensors == 0)
+ device_printf(dev, "WARNING: No AD7417 sensors detected!\n");
+
+ sc->sc_sensors = malloc (sc->sc_nsensors * sizeof(struct ad7417_sensor),
+ M_AD7417, M_WAITOK | M_ZERO);
+
+ ctx = device_get_sysctl_ctx(dev);
+ sensroot_oid = SYSCTL_ADD_NODE(ctx,
+ SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensor",
+ CTLFLAG_RD, 0, "AD7417 Sensor Information");
+
+ /* Now we can fill the properties into the allocated struct. */
+ sc->sc_nsensors = ad7417_fill_sensor_prop(dev);
+
+ /* Add sysctls for the sensors. */
+ for (i = 0; i < sc->sc_nsensors; i++) {
+ for (j = 0; j < strlen(sc->sc_sensors[i].location); j++) {
+ sysctl_name[j] = tolower(sc->sc_sensors[i].location[j]);
+ if (isspace(sysctl_name[j]))
+ sysctl_name[j] = '_';
+ }
+ sysctl_name[j] = 0;
+
+ oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sensroot_oid),
+ OID_AUTO,
+ sysctl_name, CTLFLAG_RD, 0,
+ "Sensor Information");
+
+ if (sc->sc_sensors[i].type == ADC7417_TEMP_SENSOR) {
+ unit = "temp";
+ desc = "Sensor temp in C";
+ } else {
+ unit = "volt";
+ desc = "Sensor Volt in V";
+ }
+ /* I use i to pass the sensor id. */
+ SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
+ unit, CTLTYPE_INT | CTLFLAG_RD, dev,
+ i, ad7417_sensor_sysctl,
+ sc->sc_sensors[i].type == ADC7417_TEMP_SENSOR ?
+ "IK" : "I", desc);
+ }
+ /* Dump sensor location, ID & type. */
+ if (bootverbose) {
+ device_printf(dev, "Sensors\n");
+ for (i = 0; i < sc->sc_nsensors; i++) {
+ device_printf(dev, "Location: %s ID: %d type: %d\n",
+ sc->sc_sensors[i].location,
+ sc->sc_sensors[i].id,
+ sc->sc_sensors[i].type);
+ }
+ }
+
+ return (0);
+}
+
+static int
+ad7417_get_temp(device_t dev, uint32_t addr, int *temp)
+{
+ uint16_t buf[2];
+ uint16_t read;
+
+ ad7417_read_2(dev, addr, AD7417_TEMP, buf);
+ read = *((int16_t*)buf);
+
+ /* The ADC is 10 bit, the resolution is 0.25 C.
+ The temperature is in tenth kelvin.
+ */
+ *temp = (((int16_t)(read & 0xffc0)) >> 6) * 25 / 10;
+ return (0);
+}
+
+static int
+ad7417_get_adc(device_t dev, uint32_t addr, unsigned int *value,
+ uint8_t chan)
+{
+ uint8_t cfg1, tmp;
+ uint16_t read, buf[2];
+
+ ad7417_read_1(dev, addr, AD7417_CONFIG, &cfg1);
+
+ tmp = chan << 5;
+
+ cfg1 = (cfg1 & ~AD7417_CONFMASK) | (tmp & AD7417_CONFMASK);
+
+ ad7417_write(dev, addr, AD7417_CONFIG, &cfg1, 1);
+
+ ad7417_read_2(dev, addr, AD7417_ADC, buf);
+
+ read = *((uint16_t*)buf);
+
+ *value = ((uint32_t)read) >> 6;
+
+ return (0);
+}
+
+static int
+ad7417_sensor_read(device_t dev, struct ad7417_sensor *sens, int *temp)
+{
+ struct ad7417_softc *sc;
+
+ sc = device_get_softc(dev);
+
+ /* Init the ADC. */
+ ad7417_init_adc(sc->sc_dev, sc->sc_addr);
+
+ if (sens->type == ADC7417_TEMP_SENSOR) {
+ ad7417_get_temp(sc->sc_dev, sc->sc_addr, temp);
+ *temp += FCU_ZERO_C_TO_K;
+ } else {
+ uint8_t chan;
+ switch (sens->id) {
+ case 11:
+ case 16:
+ chan = 1;
+ break;
+ case 12:
+ case 17:
+ chan = 2;
+ break;
+ case 13:
+ case 18:
+ chan = 3;
+ break;
+ case 14:
+ case 19:
+ chan = 4;
+ break;
+ default:
+ chan = 1;
+ }
+
+ ad7417_get_adc(sc->sc_dev, sc->sc_addr, temp, chan);
+ }
+ return (0);
+}
+
+static int
+ad7417_sensor_sysctl(SYSCTL_HANDLER_ARGS)
+{
+ device_t dev;
+ struct ad7417_softc *sc;
+ struct ad7417_sensor *sens;
+ int value = 0;
+ int error;
+ int temp;
+
+ dev = arg1;
+ sc = device_get_softc(dev);
+ sens = &sc->sc_sensors[arg2];
+
+ error = ad7417_sensor_read(dev, sens, &value);
+ if (error != 0)
+ return (error);
+
+ temp = value;
+
+ error = sysctl_handle_int(oidp, &temp, 0, req);
+
+ return (error);
+}
Modified: head/sys/powerpc/conf/GENERIC
==============================================================================
--- head/sys/powerpc/conf/GENERIC Sun May 29 12:15:49 2011
(r222448)
+++ head/sys/powerpc/conf/GENERIC Sun May 29 14:25:42 2011
(r222449)
@@ -174,6 +174,7 @@ device sbp # SCSI over FireWire
(Requi
device fwe # Ethernet over FireWire (non-standard!)
# Misc
+device ad7417 # PowerMac7,2 temperature sensor
device ds1775 # PowerMac7,2 temperature sensor
device fcu # Apple Fan Control Unit
device max6690 # PowerMac7,2 temperature sensor
Modified: head/sys/powerpc/conf/GENERIC64
==============================================================================
--- head/sys/powerpc/conf/GENERIC64 Sun May 29 12:15:49 2011
(r222448)
+++ head/sys/powerpc/conf/GENERIC64 Sun May 29 14:25:42 2011
(r222449)
@@ -175,6 +175,7 @@ device sbp # SCSI over FireWire
(Requi
device fwe # Ethernet over FireWire (non-standard!)
# Misc
+device ad7417 # PowerMac7,2 temperature sensor
device ds1775 # PowerMac7,2 temperature sensor
device fcu # Apple Fan Control Unit
device max6690 # PowerMac7,2 temperature sensor
Modified: head/sys/powerpc/conf/NOTES
==============================================================================
--- head/sys/powerpc/conf/NOTES Sun May 29 12:15:49 2011 (r222448)
+++ head/sys/powerpc/conf/NOTES Sun May 29 14:25:42 2011 (r222449)
@@ -39,6 +39,7 @@ device kiic # Apple Keywest I2C
Contro
device ofwd # Open Firmware disks
device adb # Apple Desktop Bus
device cuda # VIA-CUDA ADB interface
+device ad7417 # PowerMac7,2 temperature sensor
device ds1775 # PowerMac7,2 temperature sensor
device fcu # Apple Fan Control Unit
device max6690 # PowerMac7,2 temperature sensor
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