5870983d6e
Replace hardcoded sizes by nitems and sizeof Replace CTLFLAG_NEEDGIANT with CTLFLAG_MPSAFE, I run this driver since a few years with CTLFLAG_MPSAFE w/o issues. Add a HACK to handle a special case for a sensor location.
643 lines
15 KiB
C
643 lines
15 KiB
C
/*-
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* SPDX-License-Identifier: BSD-2-Clause-FreeBSD
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*
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* Copyright (c) 2010 Andreas Tobler
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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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#include <powerpc/powermac/powermac_thermal.h>
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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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struct pmac_therm therm;
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device_t dev;
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int id;
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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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struct write_data {
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uint8_t reg;
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uint8_t val;
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};
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struct read_data {
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uint8_t reg;
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uint16_t val;
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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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static int ad7417_write_read(device_t dev, uint32_t addr,
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struct write_data out, struct read_data *in);
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static int ad7417_diode_read(struct ad7417_sensor *sens);
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static int ad7417_adc_read(struct ad7417_sensor *sens);
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static int ad7417_sensor_read(struct ad7417_sensor *sens);
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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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int init_done;
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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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static 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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int try = 0;
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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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for (;;)
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{
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if (iicbus_transfer(dev, msg, nitems(msg)) == 0)
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return (0);
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if (++try > 5) {
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device_printf(dev, "iicbus write failed\n");
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return (-1);
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}
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pause("ad7417_write", hz);
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}
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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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int err, try = 0;
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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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for (;;)
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{
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err = iicbus_transfer(dev, msg, nitems(msg));
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if (err != 0)
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goto retry;
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*data = *((uint8_t*)buf);
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return (0);
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retry:
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if (++try > 5) {
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device_printf(dev, "iicbus read failed\n");
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return (-1);
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}
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pause("ad7417_read_1", hz);
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}
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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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int err, try = 0;
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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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for (;;)
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{
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err = iicbus_transfer(dev, msg, nitems(msg));
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if (err != 0)
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goto retry;
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*data = *((uint16_t*)buf);
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return (0);
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retry:
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if (++try > 5) {
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device_printf(dev, "iicbus read failed\n");
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return (-1);
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}
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pause("ad7417_read_2", hz);
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}
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}
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static int
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ad7417_write_read(device_t dev, uint32_t addr, struct write_data out,
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struct read_data *in)
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{
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uint8_t buf[4];
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int err, try = 0;
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/* Do a combined write/read. */
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struct iic_msg msg[3] = {
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{ addr, IIC_M_WR, 2, buf },
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{ addr, IIC_M_WR | IIC_M_NOSTOP, 1, &in->reg },
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{ addr, IIC_M_RD, 2, buf },
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};
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/* Prepare the write msg. */
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buf[0] = out.reg;
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buf[1] = out.val & 0xff;
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for (;;)
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{
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err = iicbus_transfer(dev, msg, nitems(msg));
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if (err != 0)
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goto retry;
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in->val = *((uint16_t*)buf);
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return (0);
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retry:
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if (++try > 5) {
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device_printf(dev, "iicbus write/read failed\n");
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return (-1);
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}
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pause("ad7417_write_read", hz);
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}
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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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int err;
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struct ad7417_softc *sc;
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sc = device_get_softc(dev);
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adc741x_config = 0;
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/* Clear Config2 */
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buf = 0;
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err = ad7417_write(dev, addr, AD7417_CONFIG2, &buf, sizeof(buf));
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/* Read & cache Config1 */
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buf = 0;
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err = ad7417_write(dev, addr, AD7417_CONFIG, &buf, sizeof(buf));
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err = 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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err = ad7417_write(dev, addr, AD7417_CONFIG, &buf, sizeof(buf));
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if (err < 0)
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return (-1);
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sc->init_done = 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, node;
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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].therm.name, 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 sensor 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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/* Fill the sensor zone property. Taken from OF. */
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prop_len = OF_getprop(child, "hwsensor-zone", id, sizeof(id));
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for (j = 0; j < i; j++)
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sc->sc_sensors[j].therm.zone = id[j];
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/* Some PowerMac's have the real location of the sensors on
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child nodes of the hwsensor-location node. Check for and
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fix the name if needed.
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This is needed to apply the below HACK with the diode.
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*/
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j = 0;
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for (node = OF_child(child); node != 0; node = OF_peer(node)) {
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OF_getprop(node, "location", location, sizeof(location));
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strcpy(sc->sc_sensors[i].therm.name, location);
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j++;
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}
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/* Finish setting up sensor properties */
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for (j = 0; j < i; j++) {
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sc->sc_sensors[j].dev = dev;
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/* HACK: Apple wired a random diode to the ADC line */
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if ((strstr(sc->sc_sensors[j].therm.name, "DIODE TEMP")
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!= NULL)
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|| (strstr(sc->sc_sensors[j].therm.name, "AD1") != NULL)) {
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sc->sc_sensors[j].type = ADC7417_TEMP_SENSOR;
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sc->sc_sensors[j].therm.read =
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(int (*)(struct pmac_therm *))(ad7417_diode_read);
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} else {
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sc->sc_sensors[j].therm.read =
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(int (*)(struct pmac_therm *))(ad7417_sensor_read);
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}
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if (sc->sc_sensors[j].type != ADC7417_TEMP_SENSOR)
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continue;
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/* Make up some ranges */
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sc->sc_sensors[j].therm.target_temp = 500 + ZERO_C_TO_K;
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sc->sc_sensors[j].therm.max_temp = 900 + ZERO_C_TO_K;
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pmac_thermal_sensor_register(&sc->sc_sensors[j].therm);
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}
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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 | CTLFLAG_MPSAFE, 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].therm.name); j++) {
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sysctl_name[j] =
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tolower(sc->sc_sensors[i].therm.name[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, sysctl_name, CTLFLAG_RD | CTLFLAG_MPSAFE, 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 unit (C)";
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} else {
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unit = "volt";
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desc = "sensor unit (mV)";
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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 | CTLFLAG_MPSAFE,
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dev, 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].therm.name,
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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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int err;
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err = ad7417_read_2(dev, addr, AD7417_TEMP, buf);
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if (err < 0)
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return (-1);
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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 tmp;
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int err;
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struct write_data config;
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struct read_data data;
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|
|
|
tmp = chan << 5;
|
|
config.reg = AD7417_CONFIG;
|
|
data.reg = AD7417_ADC;
|
|
data.val = 0;
|
|
|
|
err = ad7417_read_1(dev, addr, AD7417_CONFIG, &config.val);
|
|
|
|
config.val = (config.val & ~AD7417_CONFMASK) | (tmp & AD7417_CONFMASK);
|
|
|
|
err = ad7417_write_read(dev, addr, config, &data);
|
|
if (err < 0)
|
|
return (-1);
|
|
|
|
*value = ((uint32_t)data.val) >> 6;
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
ad7417_diode_read(struct ad7417_sensor *sens)
|
|
{
|
|
static int eeprom_read = 0;
|
|
static cell_t eeprom[2][40];
|
|
phandle_t eeprom_node;
|
|
int rawval, diode_slope, diode_offset;
|
|
int temp;
|
|
|
|
if (!eeprom_read) {
|
|
eeprom_node = OF_finddevice("/u3/i2c/cpuid@a0");
|
|
OF_getprop(eeprom_node, "cpuid", eeprom[0], sizeof(eeprom[0]));
|
|
eeprom_node = OF_finddevice("/u3/i2c/cpuid@a2");
|
|
OF_getprop(eeprom_node, "cpuid", eeprom[1], sizeof(eeprom[1]));
|
|
eeprom_read = 1;
|
|
}
|
|
|
|
rawval = ad7417_adc_read(sens);
|
|
if (rawval < 0)
|
|
return (-1);
|
|
|
|
if (strstr(sens->therm.name, "CPU B") != NULL) {
|
|
diode_slope = eeprom[1][0x11] >> 16;
|
|
diode_offset = (int16_t)(eeprom[1][0x11] & 0xffff) << 12;
|
|
} else {
|
|
diode_slope = eeprom[0][0x11] >> 16;
|
|
diode_offset = (int16_t)(eeprom[0][0x11] & 0xffff) << 12;
|
|
}
|
|
|
|
temp = (rawval*diode_slope + diode_offset) >> 2;
|
|
temp = (10*(temp >> 16)) + ((10*(temp & 0xffff)) >> 16);
|
|
|
|
return (temp + ZERO_C_TO_K);
|
|
}
|
|
|
|
static int
|
|
ad7417_adc_read(struct ad7417_sensor *sens)
|
|
{
|
|
struct ad7417_softc *sc;
|
|
uint8_t chan;
|
|
int temp;
|
|
|
|
sc = device_get_softc(sens->dev);
|
|
|
|
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;
|
|
}
|
|
|
|
if (ad7417_get_adc(sc->sc_dev, sc->sc_addr, &temp, chan) < 0)
|
|
return (-1);
|
|
|
|
return (temp);
|
|
}
|
|
|
|
|
|
static int
|
|
ad7417_sensor_read(struct ad7417_sensor *sens)
|
|
{
|
|
struct ad7417_softc *sc;
|
|
int temp;
|
|
|
|
sc = device_get_softc(sens->dev);
|
|
|
|
/* Init the ADC if not already done.*/
|
|
if (!sc->init_done)
|
|
if (ad7417_init_adc(sc->sc_dev, sc->sc_addr) < 0)
|
|
return (-1);
|
|
|
|
if (sens->type == ADC7417_TEMP_SENSOR) {
|
|
if (ad7417_get_temp(sc->sc_dev, sc->sc_addr, &temp) < 0)
|
|
return (-1);
|
|
temp += ZERO_C_TO_K;
|
|
} else {
|
|
temp = ad7417_adc_read(sens);
|
|
}
|
|
return (temp);
|
|
}
|
|
|
|
static int
|
|
ad7417_sensor_sysctl(SYSCTL_HANDLER_ARGS)
|
|
{
|
|
device_t dev;
|
|
struct ad7417_softc *sc;
|
|
struct ad7417_sensor *sens;
|
|
int value = 0;
|
|
int error;
|
|
|
|
dev = arg1;
|
|
sc = device_get_softc(dev);
|
|
sens = &sc->sc_sensors[arg2];
|
|
|
|
value = sens->therm.read(&sens->therm);
|
|
if (value < 0)
|
|
return (ENXIO);
|
|
|
|
error = sysctl_handle_int(oidp, &value, 0, req);
|
|
|
|
return (error);
|
|
}
|