Add a new driver, the ad7417, to read temperatures and voltages on some
PowerMac's. Approved by: nwhitehorn (mentor)
This commit is contained in:
Andreas Tobler
parent
e6b71fcb16
commit
d188174a4f
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=222449
@ -27,6 +27,7 @@ dev/cfi/cfi_bus_fdt.c optional cfi fdt
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dev/fb/fb.c optional sc
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dev/fdt/fdt_powerpc.c optional fdt
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dev/hwpmc/hwpmc_powerpc.c optional hwpmc
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dev/iicbus/ad7417.c optional ad7417 powermac
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dev/iicbus/ds1775.c optional ds1775 powermac
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dev/iicbus/max6690.c optional max6690 powermac
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dev/kbd/kbd.c optional sc
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457
sys/dev/iicbus/ad7417.c
Normal file
457
sys/dev/iicbus/ad7417.c
Normal file
@ -0,0 +1,457 @@
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/*-
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* Copyright (c) 2010 Andreas Tobler
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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__FBSDID("$FreeBSD$");
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#include <sys/param.h>
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#include <sys/bus.h>
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#include <sys/systm.h>
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#include <sys/module.h>
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#include <sys/callout.h>
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#include <sys/conf.h>
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#include <sys/cpu.h>
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#include <sys/ctype.h>
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#include <sys/kernel.h>
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#include <sys/reboot.h>
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#include <sys/rman.h>
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#include <sys/sysctl.h>
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#include <sys/limits.h>
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#include <machine/bus.h>
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#include <machine/md_var.h>
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#include <dev/iicbus/iicbus.h>
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#include <dev/iicbus/iiconf.h>
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#include <dev/ofw/openfirm.h>
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#include <dev/ofw/ofw_bus.h>
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#define FCU_ZERO_C_TO_K 2732
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/* CPU A/B sensors, temp and adc: AD7417. */
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#define AD7417_TEMP 0x00
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#define AD7417_CONFIG 0x01
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#define AD7417_ADC 0x04
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#define AD7417_CONFIG2 0x05
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#define AD7417_CONFMASK 0xe0
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uint8_t adc741x_config;
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struct ad7417_sensor {
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int id;
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char location[32];
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enum {
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ADC7417_TEMP_SENSOR,
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ADC7417_ADC_SENSOR
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} type;
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};
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/* Regular bus attachment functions */
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static int ad7417_probe(device_t);
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static int ad7417_attach(device_t);
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/* Utility functions */
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static int ad7417_sensor_sysctl(SYSCTL_HANDLER_ARGS);
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static int ad7417_write(device_t dev, uint32_t addr, uint8_t reg,
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uint8_t *buf, int len);
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static int ad7417_read_1(device_t dev, uint32_t addr, uint8_t reg,
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uint8_t *data);
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static int ad7417_read_2(device_t dev, uint32_t addr, uint8_t reg,
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uint16_t *data);
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struct ad7417_softc {
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device_t sc_dev;
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uint32_t sc_addr;
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struct ad7417_sensor *sc_sensors;
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int sc_nsensors;
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};
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static device_method_t ad7417_methods[] = {
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/* Device interface */
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DEVMETHOD(device_probe, ad7417_probe),
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DEVMETHOD(device_attach, ad7417_attach),
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{ 0, 0 },
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};
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static driver_t ad7417_driver = {
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"ad7417",
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ad7417_methods,
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sizeof(struct ad7417_softc)
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};
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static devclass_t ad7417_devclass;
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DRIVER_MODULE(ad7417, iicbus, ad7417_driver, ad7417_devclass, 0, 0);
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MALLOC_DEFINE(M_AD7417, "ad7417", "Supply-Monitor AD7417");
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static int
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ad7417_write(device_t dev, uint32_t addr, uint8_t reg, uint8_t *buff, int len)
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{
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unsigned char buf[4];
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struct iic_msg msg[] = {
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{ addr, IIC_M_WR, 0, buf }
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};
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msg[0].len = len + 1;
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buf[0] = reg;
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memcpy(buf + 1, buff, len);
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if (iicbus_transfer(dev, msg, 1) != 0) {
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device_printf(dev, "iicbus write failed\n");
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return (EIO);
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}
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return (0);
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}
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static int
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ad7417_read_1(device_t dev, uint32_t addr, uint8_t reg, uint8_t *data)
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{
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uint8_t buf[4];
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struct iic_msg msg[2] = {
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{ addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® },
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{ addr, IIC_M_RD, 1, buf },
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};
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if (iicbus_transfer(dev, msg, 2) != 0) {
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device_printf(dev, "iicbus read failed\n");
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return (EIO);
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}
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*data = *((uint8_t*)buf);
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return (0);
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}
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static int
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ad7417_read_2(device_t dev, uint32_t addr, uint8_t reg, uint16_t *data)
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{
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uint8_t buf[4];
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struct iic_msg msg[2] = {
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{ addr, IIC_M_WR | IIC_M_NOSTOP, 1, ® },
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{ addr, IIC_M_RD, 2, buf },
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};
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if (iicbus_transfer(dev, msg, 2) != 0) {
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device_printf(dev, "iicbus read failed\n");
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return (EIO);
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}
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*data = *((uint16_t*)buf);
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return (0);
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}
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static int
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ad7417_init_adc(device_t dev, uint32_t addr)
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{
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uint8_t buf;
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adc741x_config = 0;
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/* Clear Config2 */
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buf = 0;
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ad7417_write(dev, addr, AD7417_CONFIG2, &buf, 1);
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/* Read & cache Config1 */
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buf = 0;
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ad7417_write(dev, addr, AD7417_CONFIG, &buf, 1);
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ad7417_read_1(dev, addr, AD7417_CONFIG, &buf);
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adc741x_config = (uint8_t)buf;
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/* Disable shutdown mode */
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adc741x_config &= 0xfe;
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buf = adc741x_config;
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ad7417_write(dev, addr, AD7417_CONFIG, &buf, 1);
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return (0);
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}
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static int
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ad7417_probe(device_t dev)
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{
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const char *name, *compatible;
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struct ad7417_softc *sc;
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name = ofw_bus_get_name(dev);
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compatible = ofw_bus_get_compat(dev);
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if (!name)
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return (ENXIO);
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if (strcmp(name, "supply-monitor") != 0 ||
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strcmp(compatible, "ad7417") != 0)
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return (ENXIO);
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sc = device_get_softc(dev);
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sc->sc_dev = dev;
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sc->sc_addr = iicbus_get_addr(dev);
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device_set_desc(dev, "Supply-Monitor AD7417");
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return (0);
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}
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/*
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* This function returns the number of sensors. If we call it the second time
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* and we have allocated memory for sc->sc_sensors, we fill in the properties.
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*/
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static int
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ad7417_fill_sensor_prop(device_t dev)
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{
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phandle_t child;
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struct ad7417_softc *sc;
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u_int id[10];
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char location[96];
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char type[32];
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int i = 0, j, len = 0, prop_len, prev_len = 0;
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sc = device_get_softc(dev);
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child = ofw_bus_get_node(dev);
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/* Fill the sensor location property. */
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prop_len = OF_getprop(child, "hwsensor-location", location,
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sizeof(location));
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while (len < prop_len) {
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if (sc->sc_sensors != NULL)
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strcpy(sc->sc_sensors[i].location, location + len);
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prev_len = strlen(location + len) + 1;
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len += prev_len;
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i++;
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}
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if (sc->sc_sensors == NULL)
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return (i);
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/* Fill the fan type property. */
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len = 0;
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i = 0;
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prev_len = 0;
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prop_len = OF_getprop(child, "hwsensor-type", type, sizeof(type));
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while (len < prop_len) {
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if (strcmp(type + len, "temperature") == 0)
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sc->sc_sensors[i].type = ADC7417_TEMP_SENSOR;
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else
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sc->sc_sensors[i].type = ADC7417_ADC_SENSOR;
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prev_len = strlen(type + len) + 1;
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len += prev_len;
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i++;
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}
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/* Fill the sensor id property. Taken from OF. */
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prop_len = OF_getprop(child, "hwsensor-id", id, sizeof(id));
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for (j = 0; j < i; j++)
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sc->sc_sensors[j].id = id[j];
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return (i);
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}
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static int
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ad7417_attach(device_t dev)
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{
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struct ad7417_softc *sc;
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struct sysctl_oid *oid, *sensroot_oid;
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struct sysctl_ctx_list *ctx;
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char sysctl_name[32];
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int i, j;
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const char *unit;
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const char *desc;
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sc = device_get_softc(dev);
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sc->sc_nsensors = 0;
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/* Count the actual number of sensors. */
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sc->sc_nsensors = ad7417_fill_sensor_prop(dev);
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device_printf(dev, "%d sensors detected.\n", sc->sc_nsensors);
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if (sc->sc_nsensors == 0)
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device_printf(dev, "WARNING: No AD7417 sensors detected!\n");
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sc->sc_sensors = malloc (sc->sc_nsensors * sizeof(struct ad7417_sensor),
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M_AD7417, M_WAITOK | M_ZERO);
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ctx = device_get_sysctl_ctx(dev);
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sensroot_oid = SYSCTL_ADD_NODE(ctx,
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SYSCTL_CHILDREN(device_get_sysctl_tree(dev)), OID_AUTO, "sensor",
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CTLFLAG_RD, 0, "AD7417 Sensor Information");
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/* Now we can fill the properties into the allocated struct. */
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sc->sc_nsensors = ad7417_fill_sensor_prop(dev);
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/* Add sysctls for the sensors. */
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for (i = 0; i < sc->sc_nsensors; i++) {
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for (j = 0; j < strlen(sc->sc_sensors[i].location); j++) {
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sysctl_name[j] = tolower(sc->sc_sensors[i].location[j]);
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if (isspace(sysctl_name[j]))
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sysctl_name[j] = '_';
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}
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sysctl_name[j] = 0;
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oid = SYSCTL_ADD_NODE(ctx, SYSCTL_CHILDREN(sensroot_oid),
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OID_AUTO,
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sysctl_name, CTLFLAG_RD, 0,
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"Sensor Information");
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if (sc->sc_sensors[i].type == ADC7417_TEMP_SENSOR) {
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unit = "temp";
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desc = "Sensor temp in C";
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} else {
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unit = "volt";
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desc = "Sensor Volt in V";
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}
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/* I use i to pass the sensor id. */
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SYSCTL_ADD_PROC(ctx, SYSCTL_CHILDREN(oid), OID_AUTO,
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unit, CTLTYPE_INT | CTLFLAG_RD, dev,
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i, ad7417_sensor_sysctl,
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sc->sc_sensors[i].type == ADC7417_TEMP_SENSOR ?
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"IK" : "I", desc);
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}
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/* Dump sensor location, ID & type. */
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if (bootverbose) {
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device_printf(dev, "Sensors\n");
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for (i = 0; i < sc->sc_nsensors; i++) {
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device_printf(dev, "Location: %s ID: %d type: %d\n",
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sc->sc_sensors[i].location,
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sc->sc_sensors[i].id,
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sc->sc_sensors[i].type);
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}
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}
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return (0);
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}
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static int
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ad7417_get_temp(device_t dev, uint32_t addr, int *temp)
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{
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uint16_t buf[2];
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uint16_t read;
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ad7417_read_2(dev, addr, AD7417_TEMP, buf);
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read = *((int16_t*)buf);
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/* The ADC is 10 bit, the resolution is 0.25 C.
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The temperature is in tenth kelvin.
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*/
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*temp = (((int16_t)(read & 0xffc0)) >> 6) * 25 / 10;
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return (0);
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}
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static int
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ad7417_get_adc(device_t dev, uint32_t addr, unsigned int *value,
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uint8_t chan)
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{
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uint8_t cfg1, tmp;
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uint16_t read, buf[2];
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ad7417_read_1(dev, addr, AD7417_CONFIG, &cfg1);
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tmp = chan << 5;
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cfg1 = (cfg1 & ~AD7417_CONFMASK) | (tmp & AD7417_CONFMASK);
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ad7417_write(dev, addr, AD7417_CONFIG, &cfg1, 1);
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ad7417_read_2(dev, addr, AD7417_ADC, buf);
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read = *((uint16_t*)buf);
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*value = ((uint32_t)read) >> 6;
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return (0);
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}
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static int
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ad7417_sensor_read(device_t dev, struct ad7417_sensor *sens, int *temp)
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{
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struct ad7417_softc *sc;
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sc = device_get_softc(dev);
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/* Init the ADC. */
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ad7417_init_adc(sc->sc_dev, sc->sc_addr);
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if (sens->type == ADC7417_TEMP_SENSOR) {
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ad7417_get_temp(sc->sc_dev, sc->sc_addr, temp);
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*temp += FCU_ZERO_C_TO_K;
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} else {
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uint8_t chan;
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switch (sens->id) {
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case 11:
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case 16:
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chan = 1;
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break;
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case 12:
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case 17:
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chan = 2;
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break;
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case 13:
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case 18:
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chan = 3;
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break;
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case 14:
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case 19:
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chan = 4;
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break;
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default:
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chan = 1;
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}
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ad7417_get_adc(sc->sc_dev, sc->sc_addr, temp, chan);
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}
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return (0);
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}
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static int
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ad7417_sensor_sysctl(SYSCTL_HANDLER_ARGS)
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{
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device_t dev;
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struct ad7417_softc *sc;
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struct ad7417_sensor *sens;
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int value = 0;
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int error;
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int temp;
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dev = arg1;
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sc = device_get_softc(dev);
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sens = &sc->sc_sensors[arg2];
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error = ad7417_sensor_read(dev, sens, &value);
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if (error != 0)
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return (error);
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temp = value;
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error = sysctl_handle_int(oidp, &temp, 0, req);
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return (error);
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}
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@ -174,6 +174,7 @@ device sbp # SCSI over FireWire (Requires scbus and da)
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device fwe # Ethernet over FireWire (non-standard!)
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# Misc
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device ad7417 # PowerMac7,2 temperature sensor
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device ds1775 # PowerMac7,2 temperature sensor
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device fcu # Apple Fan Control Unit
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device max6690 # PowerMac7,2 temperature sensor
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@ -175,6 +175,7 @@ device sbp # SCSI over FireWire (Requires scbus and da)
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device fwe # Ethernet over FireWire (non-standard!)
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# Misc
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device ad7417 # PowerMac7,2 temperature sensor
|
||||
device ds1775 # PowerMac7,2 temperature sensor
|
||||
device fcu # Apple Fan Control Unit
|
||||
device max6690 # PowerMac7,2 temperature sensor
|
||||
|
||||
@ -39,6 +39,7 @@ device kiic # Apple Keywest I2C Controller
|
||||
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
|
||||
|
||||
Loading…
Reference in New Issue
Block a user