2005-04-17 00:20:36 +02:00
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/*
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* Device driver for the thermostats & fan controller of the
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* Apple G5 "PowerMac7,2" desktop machines.
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*
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* (c) Copyright IBM Corp. 2003-2004
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*
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* Maintained by: Benjamin Herrenschmidt
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* <benh@kernel.crashing.org>
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*
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*
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* The algorithm used is the PID control algorithm, used the same
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* way the published Darwin code does, using the same values that
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* are present in the Darwin 7.0 snapshot property lists.
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*
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* As far as the CPUs control loops are concerned, I use the
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* calibration & PID constants provided by the EEPROM,
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* I do _not_ embed any value from the property lists, as the ones
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* provided by Darwin 7.0 seem to always have an older version that
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* what I've seen on the actual computers.
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* It would be interesting to verify that though. Darwin has a
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* version code of 1.0.0d11 for all control loops it seems, while
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* so far, the machines EEPROMs contain a dataset versioned 1.0.0f
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*
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* Darwin doesn't provide source to all parts, some missing
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* bits like the AppleFCU driver or the actual scale of some
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* of the values returned by sensors had to be "guessed" some
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* way... or based on what Open Firmware does.
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*
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* I didn't yet figure out how to get the slots power consumption
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* out of the FCU, so that part has not been implemented yet and
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* the slots fan is set to a fixed 50% PWM, hoping this value is
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* safe enough ...
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*
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* Note: I have observed strange oscillations of the CPU control
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* loop on a dual G5 here. When idle, the CPU exhaust fan tend to
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* oscillates slowly (over several minutes) between the minimum
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* of 300RPMs and approx. 1000 RPMs. I don't know what is causing
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* this, it could be some incorrect constant or an error in the
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* way I ported the algorithm, or it could be just normal. I
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* don't have full understanding on the way Apple tweaked the PID
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* algorithm for the CPU control, it is definitely not a standard
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* implementation...
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*
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* TODO: - Check MPU structure version/signature
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* - Add things like /sbin/overtemp for non-critical
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* overtemp conditions so userland can take some policy
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* decisions, like slewing down CPUs
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* - Deal with fan and i2c failures in a better way
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* - Maybe do a generic PID based on params used for
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* U3 and Drives ? Definitely need to factor code a bit
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* bettter... also make sensor detection more robust using
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* the device-tree to probe for them
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* - Figure out how to get the slots consumption and set the
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* slots fan accordingly
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*
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* History:
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*
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* Nov. 13, 2003 : 0.5
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* - First release
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*
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* Nov. 14, 2003 : 0.6
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* - Read fan speed from FCU, low level fan routines now deal
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* with errors & check fan status, though higher level don't
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* do much.
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* - Move a bunch of definitions to .h file
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*
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* Nov. 18, 2003 : 0.7
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* - Fix build on ppc64 kernel
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* - Move back statics definitions to .c file
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* - Avoid calling schedule_timeout with a negative number
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*
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* Dec. 18, 2003 : 0.8
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* - Fix typo when reading back fan speed on 2 CPU machines
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*
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* Mar. 11, 2004 : 0.9
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* - Rework code accessing the ADC chips, make it more robust and
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* closer to the chip spec. Also make sure it is configured properly,
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* I've seen yet unexplained cases where on startup, I would have stale
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* values in the configuration register
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* - Switch back to use of target fan speed for PID, thus lowering
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* pressure on i2c
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*
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* Oct. 20, 2004 : 1.1
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* - Add device-tree lookup for fan IDs, should detect liquid cooling
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* pumps when present
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* - Enable driver for PowerMac7,3 machines
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* - Split the U3/Backside cooling on U3 & U3H versions as Darwin does
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* - Add new CPU cooling algorithm for machines with liquid cooling
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* - Workaround for some PowerMac7,3 with empty "fan" node in the devtree
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* - Fix a signed/unsigned compare issue in some PID loops
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*
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* Mar. 10, 2005 : 1.2
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* - Add basic support for Xserve G5
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* - Retreive pumps min/max from EEPROM image in device-tree (broken)
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* - Use min/max macros here or there
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* - Latest darwin updated U3H min fan speed to 20% PWM
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*
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/errno.h>
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#include <linux/kernel.h>
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#include <linux/delay.h>
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#include <linux/sched.h>
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#include <linux/i2c.h>
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#include <linux/slab.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/smp_lock.h>
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#include <linux/wait.h>
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#include <linux/reboot.h>
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#include <linux/kmod.h>
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#include <linux/i2c.h>
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#include <linux/i2c-dev.h>
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#include <asm/prom.h>
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#include <asm/machdep.h>
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#include <asm/io.h>
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#include <asm/system.h>
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#include <asm/sections.h>
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#include <asm/of_device.h>
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2005-07-06 21:44:41 +02:00
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#include <asm/macio.h>
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2005-04-17 00:20:36 +02:00
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#include "therm_pm72.h"
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#define VERSION "1.2b2"
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#undef DEBUG
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#ifdef DEBUG
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#define DBG(args...) printk(args)
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#else
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#define DBG(args...) do { } while(0)
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#endif
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/*
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* Driver statics
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*/
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static struct of_device * of_dev;
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static struct i2c_adapter * u3_0;
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static struct i2c_adapter * u3_1;
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static struct i2c_adapter * k2;
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static struct i2c_client * fcu;
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static struct cpu_pid_state cpu_state[2];
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static struct basckside_pid_params backside_params;
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static struct backside_pid_state backside_state;
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static struct drives_pid_state drives_state;
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static struct dimm_pid_state dimms_state;
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static int state;
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static int cpu_count;
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static int cpu_pid_type;
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static pid_t ctrl_task;
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static struct completion ctrl_complete;
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static int critical_state;
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static int rackmac;
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static s32 dimm_output_clamp;
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static DECLARE_MUTEX(driver_lock);
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/*
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* We have 3 types of CPU PID control. One is "split" old style control
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* for intake & exhaust fans, the other is "combined" control for both
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* CPUs that also deals with the pumps when present. To be "compatible"
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* with OS X at this point, we only use "COMBINED" on the machines that
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* are identified as having the pumps (though that identification is at
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* least dodgy). Ultimately, we could probably switch completely to this
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* algorithm provided we hack it to deal with the UP case
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*/
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#define CPU_PID_TYPE_SPLIT 0
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#define CPU_PID_TYPE_COMBINED 1
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#define CPU_PID_TYPE_RACKMAC 2
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/*
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* This table describes all fans in the FCU. The "id" and "type" values
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* are defaults valid for all earlier machines. Newer machines will
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* eventually override the table content based on the device-tree
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*/
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struct fcu_fan_table
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{
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char* loc; /* location code */
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int type; /* 0 = rpm, 1 = pwm, 2 = pump */
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int id; /* id or -1 */
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};
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#define FCU_FAN_RPM 0
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#define FCU_FAN_PWM 1
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#define FCU_FAN_ABSENT_ID -1
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#define FCU_FAN_COUNT ARRAY_SIZE(fcu_fans)
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struct fcu_fan_table fcu_fans[] = {
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[BACKSIDE_FAN_PWM_INDEX] = {
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.loc = "BACKSIDE,SYS CTRLR FAN",
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.type = FCU_FAN_PWM,
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.id = BACKSIDE_FAN_PWM_DEFAULT_ID,
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},
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[DRIVES_FAN_RPM_INDEX] = {
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.loc = "DRIVE BAY",
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.type = FCU_FAN_RPM,
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.id = DRIVES_FAN_RPM_DEFAULT_ID,
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},
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[SLOTS_FAN_PWM_INDEX] = {
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.loc = "SLOT,PCI FAN",
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.type = FCU_FAN_PWM,
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.id = SLOTS_FAN_PWM_DEFAULT_ID,
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},
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[CPUA_INTAKE_FAN_RPM_INDEX] = {
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.loc = "CPU A INTAKE",
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.type = FCU_FAN_RPM,
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.id = CPUA_INTAKE_FAN_RPM_DEFAULT_ID,
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},
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[CPUA_EXHAUST_FAN_RPM_INDEX] = {
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.loc = "CPU A EXHAUST",
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.type = FCU_FAN_RPM,
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.id = CPUA_EXHAUST_FAN_RPM_DEFAULT_ID,
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},
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[CPUB_INTAKE_FAN_RPM_INDEX] = {
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.loc = "CPU B INTAKE",
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.type = FCU_FAN_RPM,
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.id = CPUB_INTAKE_FAN_RPM_DEFAULT_ID,
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},
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[CPUB_EXHAUST_FAN_RPM_INDEX] = {
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.loc = "CPU B EXHAUST",
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.type = FCU_FAN_RPM,
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.id = CPUB_EXHAUST_FAN_RPM_DEFAULT_ID,
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},
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/* pumps aren't present by default, have to be looked up in the
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* device-tree
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*/
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[CPUA_PUMP_RPM_INDEX] = {
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.loc = "CPU A PUMP",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPUB_PUMP_RPM_INDEX] = {
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.loc = "CPU B PUMP",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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/* Xserve fans */
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[CPU_A1_FAN_RPM_INDEX] = {
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.loc = "CPU A 1",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPU_A2_FAN_RPM_INDEX] = {
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.loc = "CPU A 2",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPU_A3_FAN_RPM_INDEX] = {
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.loc = "CPU A 3",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPU_B1_FAN_RPM_INDEX] = {
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.loc = "CPU B 1",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPU_B2_FAN_RPM_INDEX] = {
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.loc = "CPU B 2",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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[CPU_B3_FAN_RPM_INDEX] = {
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.loc = "CPU B 3",
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.type = FCU_FAN_RPM,
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.id = FCU_FAN_ABSENT_ID,
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},
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};
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/*
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* i2c_driver structure to attach to the host i2c controller
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*/
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static int therm_pm72_attach(struct i2c_adapter *adapter);
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static int therm_pm72_detach(struct i2c_adapter *adapter);
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static struct i2c_driver therm_pm72_driver =
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{
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.owner = THIS_MODULE,
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.name = "therm_pm72",
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.flags = I2C_DF_NOTIFY,
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.attach_adapter = therm_pm72_attach,
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.detach_adapter = therm_pm72_detach,
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};
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/*
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* Utility function to create an i2c_client structure and
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* attach it to one of u3 adapters
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*/
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static struct i2c_client *attach_i2c_chip(int id, const char *name)
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{
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struct i2c_client *clt;
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struct i2c_adapter *adap;
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if (id & 0x200)
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adap = k2;
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else if (id & 0x100)
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adap = u3_1;
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else
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adap = u3_0;
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if (adap == NULL)
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return NULL;
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clt = kmalloc(sizeof(struct i2c_client), GFP_KERNEL);
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if (clt == NULL)
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return NULL;
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memset(clt, 0, sizeof(struct i2c_client));
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clt->addr = (id >> 1) & 0x7f;
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clt->adapter = adap;
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clt->driver = &therm_pm72_driver;
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strncpy(clt->name, name, I2C_NAME_SIZE-1);
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if (i2c_attach_client(clt)) {
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printk(KERN_ERR "therm_pm72: Failed to attach to i2c ID 0x%x\n", id);
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kfree(clt);
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return NULL;
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}
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return clt;
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}
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/*
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* Utility function to get rid of the i2c_client structure
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* (will also detach from the adapter hopepfully)
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*/
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static void detach_i2c_chip(struct i2c_client *clt)
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{
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i2c_detach_client(clt);
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kfree(clt);
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}
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/*
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* Here are the i2c chip access wrappers
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*/
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static void initialize_adc(struct cpu_pid_state *state)
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{
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int rc;
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u8 buf[2];
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/* Read ADC the configuration register and cache it. We
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* also make sure Config2 contains proper values, I've seen
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* cases where we got stale grabage in there, thus preventing
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* proper reading of conv. values
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*/
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/* Clear Config2 */
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buf[0] = 5;
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|
|
|
buf[1] = 0;
|
|
|
|
i2c_master_send(state->monitor, buf, 2);
|
|
|
|
|
|
|
|
/* Read & cache Config1 */
|
|
|
|
buf[0] = 1;
|
|
|
|
rc = i2c_master_send(state->monitor, buf, 1);
|
|
|
|
if (rc > 0) {
|
|
|
|
rc = i2c_master_recv(state->monitor, buf, 1);
|
|
|
|
if (rc > 0) {
|
|
|
|
state->adc_config = buf[0];
|
|
|
|
DBG("ADC config reg: %02x\n", state->adc_config);
|
|
|
|
/* Disable shutdown mode */
|
|
|
|
state->adc_config &= 0xfe;
|
|
|
|
buf[0] = 1;
|
|
|
|
buf[1] = state->adc_config;
|
|
|
|
rc = i2c_master_send(state->monitor, buf, 2);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (rc <= 0)
|
|
|
|
printk(KERN_ERR "therm_pm72: Error reading ADC config"
|
|
|
|
" register !\n");
|
|
|
|
}
|
|
|
|
|
|
|
|
static int read_smon_adc(struct cpu_pid_state *state, int chan)
|
|
|
|
{
|
|
|
|
int rc, data, tries = 0;
|
|
|
|
u8 buf[2];
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
/* Set channel */
|
|
|
|
buf[0] = 1;
|
|
|
|
buf[1] = (state->adc_config & 0x1f) | (chan << 5);
|
|
|
|
rc = i2c_master_send(state->monitor, buf, 2);
|
|
|
|
if (rc <= 0)
|
|
|
|
goto error;
|
|
|
|
/* Wait for convertion */
|
|
|
|
msleep(1);
|
|
|
|
/* Switch to data register */
|
|
|
|
buf[0] = 4;
|
|
|
|
rc = i2c_master_send(state->monitor, buf, 1);
|
|
|
|
if (rc <= 0)
|
|
|
|
goto error;
|
|
|
|
/* Read result */
|
|
|
|
rc = i2c_master_recv(state->monitor, buf, 2);
|
|
|
|
if (rc < 0)
|
|
|
|
goto error;
|
|
|
|
data = ((u16)buf[0]) << 8 | (u16)buf[1];
|
|
|
|
return data >> 6;
|
|
|
|
error:
|
|
|
|
DBG("Error reading ADC, retrying...\n");
|
|
|
|
if (++tries > 10) {
|
|
|
|
printk(KERN_ERR "therm_pm72: Error reading ADC !\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
msleep(10);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int read_lm87_reg(struct i2c_client * chip, int reg)
|
|
|
|
{
|
|
|
|
int rc, tries = 0;
|
|
|
|
u8 buf;
|
|
|
|
|
|
|
|
for (;;) {
|
|
|
|
/* Set address */
|
|
|
|
buf = (u8)reg;
|
|
|
|
rc = i2c_master_send(chip, &buf, 1);
|
|
|
|
if (rc <= 0)
|
|
|
|
goto error;
|
|
|
|
rc = i2c_master_recv(chip, &buf, 1);
|
|
|
|
if (rc <= 0)
|
|
|
|
goto error;
|
|
|
|
return (int)buf;
|
|
|
|
error:
|
|
|
|
DBG("Error reading LM87, retrying...\n");
|
|
|
|
if (++tries > 10) {
|
|
|
|
printk(KERN_ERR "therm_pm72: Error reading LM87 !\n");
|
|
|
|
return -1;
|
|
|
|
}
|
|
|
|
msleep(10);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static int fan_read_reg(int reg, unsigned char *buf, int nb)
|
|
|
|
{
|
|
|
|
int tries, nr, nw;
|
|
|
|
|
|
|
|
buf[0] = reg;
|
|
|
|
tries = 0;
|
|
|
|
for (;;) {
|
|
|
|
nw = i2c_master_send(fcu, buf, 1);
|
|
|
|
if (nw > 0 || (nw < 0 && nw != -EIO) || tries >= 100)
|
|
|
|
break;
|
|
|
|
msleep(10);
|
|
|
|
++tries;
|
|
|
|
}
|
|
|
|
if (nw <= 0) {
|
|
|
|
printk(KERN_ERR "Failure writing address to FCU: %d", nw);
|
|
|
|
return -EIO;
|
|
|
|
}
|
|
|
|
tries = 0;
|
|
|
|
for (;;) {
|
|
|
|
nr = i2c_master_recv(fcu, buf, nb);
|
|
|
|
if (nr > 0 || (nr < 0 && nr != ENODEV) || tries >= 100)
|
|
|
|
break;
|
|
|
|
msleep(10);
|
|
|
|
++tries;
|
|
|
|
}
|
|
|
|
if (nr <= 0)
|
|
|
|
printk(KERN_ERR "Failure reading data from FCU: %d", nw);
|
|
|
|
return nr;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int fan_write_reg(int reg, const unsigned char *ptr, int nb)
|
|
|
|
{
|
|
|
|
int tries, nw;
|
|
|
|
unsigned char buf[16];
|
|
|
|
|
|
|
|
buf[0] = reg;
|
|
|
|
memcpy(buf+1, ptr, nb);
|
|
|
|
++nb;
|
|
|
|
tries = 0;
|
|
|
|
for (;;) {
|
|
|
|
nw = i2c_master_send(fcu, buf, nb);
|
|
|
|
if (nw > 0 || (nw < 0 && nw != EIO) || tries >= 100)
|
|
|
|
break;
|
|
|
|
msleep(10);
|
|
|
|
++tries;
|
|
|
|
}
|
|
|
|
if (nw < 0)
|
|
|
|
printk(KERN_ERR "Failure writing to FCU: %d", nw);
|
|
|
|
return nw;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int start_fcu(void)
|
|
|
|
{
|
|
|
|
unsigned char buf = 0xff;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
rc = fan_write_reg(0xe, &buf, 1);
|
|
|
|
if (rc < 0)
|
|
|
|
return -EIO;
|
|
|
|
rc = fan_write_reg(0x2e, &buf, 1);
|
|
|
|
if (rc < 0)
|
|
|
|
return -EIO;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int set_rpm_fan(int fan_index, int rpm)
|
|
|
|
{
|
|
|
|
unsigned char buf[2];
|
|
|
|
int rc, id;
|
|
|
|
|
|
|
|
if (fcu_fans[fan_index].type != FCU_FAN_RPM)
|
|
|
|
return -EINVAL;
|
|
|
|
id = fcu_fans[fan_index].id;
|
|
|
|
if (id == FCU_FAN_ABSENT_ID)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (rpm < 300)
|
|
|
|
rpm = 300;
|
|
|
|
else if (rpm > 8191)
|
|
|
|
rpm = 8191;
|
|
|
|
buf[0] = rpm >> 5;
|
|
|
|
buf[1] = rpm << 3;
|
|
|
|
rc = fan_write_reg(0x10 + (id * 2), buf, 2);
|
|
|
|
if (rc < 0)
|
|
|
|
return -EIO;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_rpm_fan(int fan_index, int programmed)
|
|
|
|
{
|
|
|
|
unsigned char failure;
|
|
|
|
unsigned char active;
|
|
|
|
unsigned char buf[2];
|
|
|
|
int rc, id, reg_base;
|
|
|
|
|
|
|
|
if (fcu_fans[fan_index].type != FCU_FAN_RPM)
|
|
|
|
return -EINVAL;
|
|
|
|
id = fcu_fans[fan_index].id;
|
|
|
|
if (id == FCU_FAN_ABSENT_ID)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
rc = fan_read_reg(0xb, &failure, 1);
|
|
|
|
if (rc != 1)
|
|
|
|
return -EIO;
|
|
|
|
if ((failure & (1 << id)) != 0)
|
|
|
|
return -EFAULT;
|
|
|
|
rc = fan_read_reg(0xd, &active, 1);
|
|
|
|
if (rc != 1)
|
|
|
|
return -EIO;
|
|
|
|
if ((active & (1 << id)) == 0)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
/* Programmed value or real current speed */
|
|
|
|
reg_base = programmed ? 0x10 : 0x11;
|
|
|
|
rc = fan_read_reg(reg_base + (id * 2), buf, 2);
|
|
|
|
if (rc != 2)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
return (buf[0] << 5) | buf[1] >> 3;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int set_pwm_fan(int fan_index, int pwm)
|
|
|
|
{
|
|
|
|
unsigned char buf[2];
|
|
|
|
int rc, id;
|
|
|
|
|
|
|
|
if (fcu_fans[fan_index].type != FCU_FAN_PWM)
|
|
|
|
return -EINVAL;
|
|
|
|
id = fcu_fans[fan_index].id;
|
|
|
|
if (id == FCU_FAN_ABSENT_ID)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
if (pwm < 10)
|
|
|
|
pwm = 10;
|
|
|
|
else if (pwm > 100)
|
|
|
|
pwm = 100;
|
|
|
|
pwm = (pwm * 2559) / 1000;
|
|
|
|
buf[0] = pwm;
|
|
|
|
rc = fan_write_reg(0x30 + (id * 2), buf, 1);
|
|
|
|
if (rc < 0)
|
|
|
|
return rc;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int get_pwm_fan(int fan_index)
|
|
|
|
{
|
|
|
|
unsigned char failure;
|
|
|
|
unsigned char active;
|
|
|
|
unsigned char buf[2];
|
|
|
|
int rc, id;
|
|
|
|
|
|
|
|
if (fcu_fans[fan_index].type != FCU_FAN_PWM)
|
|
|
|
return -EINVAL;
|
|
|
|
id = fcu_fans[fan_index].id;
|
|
|
|
if (id == FCU_FAN_ABSENT_ID)
|
|
|
|
return -EINVAL;
|
|
|
|
|
|
|
|
rc = fan_read_reg(0x2b, &failure, 1);
|
|
|
|
if (rc != 1)
|
|
|
|
return -EIO;
|
|
|
|
if ((failure & (1 << id)) != 0)
|
|
|
|
return -EFAULT;
|
|
|
|
rc = fan_read_reg(0x2d, &active, 1);
|
|
|
|
if (rc != 1)
|
|
|
|
return -EIO;
|
|
|
|
if ((active & (1 << id)) == 0)
|
|
|
|
return -ENXIO;
|
|
|
|
|
|
|
|
/* Programmed value or real current speed */
|
|
|
|
rc = fan_read_reg(0x30 + (id * 2), buf, 1);
|
|
|
|
if (rc != 1)
|
|
|
|
return -EIO;
|
|
|
|
|
|
|
|
return (buf[0] * 1000) / 2559;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Utility routine to read the CPU calibration EEPROM data
|
|
|
|
* from the device-tree
|
|
|
|
*/
|
|
|
|
static int read_eeprom(int cpu, struct mpu_data *out)
|
|
|
|
{
|
|
|
|
struct device_node *np;
|
|
|
|
char nodename[64];
|
|
|
|
u8 *data;
|
|
|
|
int len;
|
|
|
|
|
|
|
|
/* prom.c routine for finding a node by path is a bit brain dead
|
|
|
|
* and requires exact @xxx unit numbers. This is a bit ugly but
|
|
|
|
* will work for these machines
|
|
|
|
*/
|
|
|
|
sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0);
|
|
|
|
np = of_find_node_by_path(nodename);
|
|
|
|
if (np == NULL) {
|
|
|
|
printk(KERN_ERR "therm_pm72: Failed to retreive cpuid node from device-tree\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
data = (u8 *)get_property(np, "cpuid", &len);
|
|
|
|
if (data == NULL) {
|
|
|
|
printk(KERN_ERR "therm_pm72: Failed to retreive cpuid property from device-tree\n");
|
|
|
|
of_node_put(np);
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
memcpy(out, data, sizeof(struct mpu_data));
|
|
|
|
of_node_put(np);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void fetch_cpu_pumps_minmax(void)
|
|
|
|
{
|
|
|
|
struct cpu_pid_state *state0 = &cpu_state[0];
|
|
|
|
struct cpu_pid_state *state1 = &cpu_state[1];
|
|
|
|
u16 pump_min = 0, pump_max = 0xffff;
|
|
|
|
u16 tmp[4];
|
|
|
|
|
|
|
|
/* Try to fetch pumps min/max infos from eeprom */
|
|
|
|
|
|
|
|
memcpy(&tmp, &state0->mpu.processor_part_num, 8);
|
|
|
|
if (tmp[0] != 0xffff && tmp[1] != 0xffff) {
|
|
|
|
pump_min = max(pump_min, tmp[0]);
|
|
|
|
pump_max = min(pump_max, tmp[1]);
|
|
|
|
}
|
|
|
|
if (tmp[2] != 0xffff && tmp[3] != 0xffff) {
|
|
|
|
pump_min = max(pump_min, tmp[2]);
|
|
|
|
pump_max = min(pump_max, tmp[3]);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Double check the values, this _IS_ needed as the EEPROM on
|
|
|
|
* some dual 2.5Ghz G5s seem, at least, to have both min & max
|
|
|
|
* same to the same value ... (grrrr)
|
|
|
|
*/
|
|
|
|
if (pump_min == pump_max || pump_min == 0 || pump_max == 0xffff) {
|
|
|
|
pump_min = CPU_PUMP_OUTPUT_MIN;
|
|
|
|
pump_max = CPU_PUMP_OUTPUT_MAX;
|
|
|
|
}
|
|
|
|
|
|
|
|
state0->pump_min = state1->pump_min = pump_min;
|
|
|
|
state0->pump_max = state1->pump_max = pump_max;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Now, unfortunately, sysfs doesn't give us a nice void * we could
|
|
|
|
* pass around to the attribute functions, so we don't really have
|
|
|
|
* choice but implement a bunch of them...
|
|
|
|
*
|
|
|
|
* That sucks a bit, we take the lock because FIX32TOPRINT evaluates
|
|
|
|
* the input twice... I accept patches :)
|
|
|
|
*/
|
|
|
|
#define BUILD_SHOW_FUNC_FIX(name, data) \
|
2005-05-17 12:42:58 +02:00
|
|
|
static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
|
2005-04-17 00:20:36 +02:00
|
|
|
{ \
|
|
|
|
ssize_t r; \
|
|
|
|
down(&driver_lock); \
|
|
|
|
r = sprintf(buf, "%d.%03d", FIX32TOPRINT(data)); \
|
|
|
|
up(&driver_lock); \
|
|
|
|
return r; \
|
|
|
|
}
|
|
|
|
#define BUILD_SHOW_FUNC_INT(name, data) \
|
2005-05-17 12:42:58 +02:00
|
|
|
static ssize_t show_##name(struct device *dev, struct device_attribute *attr, char *buf) \
|
2005-04-17 00:20:36 +02:00
|
|
|
{ \
|
|
|
|
return sprintf(buf, "%d", data); \
|
|
|
|
}
|
|
|
|
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu0_temperature, cpu_state[0].last_temp)
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu0_voltage, cpu_state[0].voltage)
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu0_current, cpu_state[0].current_a)
|
|
|
|
BUILD_SHOW_FUNC_INT(cpu0_exhaust_fan_rpm, cpu_state[0].rpm)
|
|
|
|
BUILD_SHOW_FUNC_INT(cpu0_intake_fan_rpm, cpu_state[0].intake_rpm)
|
|
|
|
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu1_temperature, cpu_state[1].last_temp)
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu1_voltage, cpu_state[1].voltage)
|
|
|
|
BUILD_SHOW_FUNC_FIX(cpu1_current, cpu_state[1].current_a)
|
|
|
|
BUILD_SHOW_FUNC_INT(cpu1_exhaust_fan_rpm, cpu_state[1].rpm)
|
|
|
|
BUILD_SHOW_FUNC_INT(cpu1_intake_fan_rpm, cpu_state[1].intake_rpm)
|
|
|
|
|
|
|
|
BUILD_SHOW_FUNC_FIX(backside_temperature, backside_state.last_temp)
|
|
|
|
BUILD_SHOW_FUNC_INT(backside_fan_pwm, backside_state.pwm)
|
|
|
|
|
|
|
|
BUILD_SHOW_FUNC_FIX(drives_temperature, drives_state.last_temp)
|
|
|
|
BUILD_SHOW_FUNC_INT(drives_fan_rpm, drives_state.rpm)
|
|
|
|
|
|
|
|
BUILD_SHOW_FUNC_FIX(dimms_temperature, dimms_state.last_temp)
|
|
|
|
|
|
|
|
static DEVICE_ATTR(cpu0_temperature,S_IRUGO,show_cpu0_temperature,NULL);
|
|
|
|
static DEVICE_ATTR(cpu0_voltage,S_IRUGO,show_cpu0_voltage,NULL);
|
|
|
|
static DEVICE_ATTR(cpu0_current,S_IRUGO,show_cpu0_current,NULL);
|
|
|
|
static DEVICE_ATTR(cpu0_exhaust_fan_rpm,S_IRUGO,show_cpu0_exhaust_fan_rpm,NULL);
|
|
|
|
static DEVICE_ATTR(cpu0_intake_fan_rpm,S_IRUGO,show_cpu0_intake_fan_rpm,NULL);
|
|
|
|
|
|
|
|
static DEVICE_ATTR(cpu1_temperature,S_IRUGO,show_cpu1_temperature,NULL);
|
|
|
|
static DEVICE_ATTR(cpu1_voltage,S_IRUGO,show_cpu1_voltage,NULL);
|
|
|
|
static DEVICE_ATTR(cpu1_current,S_IRUGO,show_cpu1_current,NULL);
|
|
|
|
static DEVICE_ATTR(cpu1_exhaust_fan_rpm,S_IRUGO,show_cpu1_exhaust_fan_rpm,NULL);
|
|
|
|
static DEVICE_ATTR(cpu1_intake_fan_rpm,S_IRUGO,show_cpu1_intake_fan_rpm,NULL);
|
|
|
|
|
|
|
|
static DEVICE_ATTR(backside_temperature,S_IRUGO,show_backside_temperature,NULL);
|
|
|
|
static DEVICE_ATTR(backside_fan_pwm,S_IRUGO,show_backside_fan_pwm,NULL);
|
|
|
|
|
|
|
|
static DEVICE_ATTR(drives_temperature,S_IRUGO,show_drives_temperature,NULL);
|
|
|
|
static DEVICE_ATTR(drives_fan_rpm,S_IRUGO,show_drives_fan_rpm,NULL);
|
|
|
|
|
|
|
|
static DEVICE_ATTR(dimms_temperature,S_IRUGO,show_dimms_temperature,NULL);
|
|
|
|
|
|
|
|
/*
|
|
|
|
* CPUs fans control loop
|
|
|
|
*/
|
|
|
|
|
|
|
|
static int do_read_one_cpu_values(struct cpu_pid_state *state, s32 *temp, s32 *power)
|
|
|
|
{
|
|
|
|
s32 ltemp, volts, amps;
|
|
|
|
int index, rc = 0;
|
|
|
|
|
|
|
|
/* Default (in case of error) */
|
|
|
|
*temp = state->cur_temp;
|
|
|
|
*power = state->cur_power;
|
|
|
|
|
|
|
|
if (cpu_pid_type == CPU_PID_TYPE_RACKMAC)
|
|
|
|
index = (state->index == 0) ?
|
|
|
|
CPU_A1_FAN_RPM_INDEX : CPU_B1_FAN_RPM_INDEX;
|
|
|
|
else
|
|
|
|
index = (state->index == 0) ?
|
|
|
|
CPUA_EXHAUST_FAN_RPM_INDEX : CPUB_EXHAUST_FAN_RPM_INDEX;
|
|
|
|
|
|
|
|
/* Read current fan status */
|
|
|
|
rc = get_rpm_fan(index, !RPM_PID_USE_ACTUAL_SPEED);
|
|
|
|
if (rc < 0) {
|
|
|
|
/* XXX What do we do now ? Nothing for now, keep old value, but
|
|
|
|
* return error upstream
|
|
|
|
*/
|
|
|
|
DBG(" cpu %d, fan reading error !\n", state->index);
|
|
|
|
} else {
|
|
|
|
state->rpm = rc;
|
|
|
|
DBG(" cpu %d, exhaust RPM: %d\n", state->index, state->rpm);
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Get some sensor readings and scale it */
|
|
|
|
ltemp = read_smon_adc(state, 1);
|
|
|
|
if (ltemp == -1) {
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
state->overtemp++;
|
|
|
|
if (rc == 0)
|
|
|
|
rc = -EIO;
|
|
|
|
DBG(" cpu %d, temp reading error !\n", state->index);
|
|
|
|
} else {
|
|
|
|
/* Fixup temperature according to diode calibration
|
|
|
|
*/
|
|
|
|
DBG(" cpu %d, temp raw: %04x, m_diode: %04x, b_diode: %04x\n",
|
|
|
|
state->index,
|
|
|
|
ltemp, state->mpu.mdiode, state->mpu.bdiode);
|
|
|
|
*temp = ((s32)ltemp * (s32)state->mpu.mdiode + ((s32)state->mpu.bdiode << 12)) >> 2;
|
|
|
|
state->last_temp = *temp;
|
|
|
|
DBG(" temp: %d.%03d\n", FIX32TOPRINT((*temp)));
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Read voltage & current and calculate power
|
|
|
|
*/
|
|
|
|
volts = read_smon_adc(state, 3);
|
|
|
|
amps = read_smon_adc(state, 4);
|
|
|
|
|
|
|
|
/* Scale voltage and current raw sensor values according to fixed scales
|
|
|
|
* obtained in Darwin and calculate power from I and V
|
|
|
|
*/
|
|
|
|
volts *= ADC_CPU_VOLTAGE_SCALE;
|
|
|
|
amps *= ADC_CPU_CURRENT_SCALE;
|
|
|
|
*power = (((u64)volts) * ((u64)amps)) >> 16;
|
|
|
|
state->voltage = volts;
|
|
|
|
state->current_a = amps;
|
|
|
|
state->last_power = *power;
|
|
|
|
|
|
|
|
DBG(" cpu %d, current: %d.%03d, voltage: %d.%03d, power: %d.%03d W\n",
|
|
|
|
state->index, FIX32TOPRINT(state->current_a),
|
|
|
|
FIX32TOPRINT(state->voltage), FIX32TOPRINT(*power));
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void do_cpu_pid(struct cpu_pid_state *state, s32 temp, s32 power)
|
|
|
|
{
|
|
|
|
s32 power_target, integral, derivative, proportional, adj_in_target, sval;
|
|
|
|
s64 integ_p, deriv_p, prop_p, sum;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* Calculate power target value (could be done once for all)
|
|
|
|
* and convert to a 16.16 fp number
|
|
|
|
*/
|
|
|
|
power_target = ((u32)(state->mpu.pmaxh - state->mpu.padjmax)) << 16;
|
|
|
|
DBG(" power target: %d.%03d, error: %d.%03d\n",
|
|
|
|
FIX32TOPRINT(power_target), FIX32TOPRINT(power_target - power));
|
|
|
|
|
|
|
|
/* Store temperature and power in history array */
|
|
|
|
state->cur_temp = (state->cur_temp + 1) % CPU_TEMP_HISTORY_SIZE;
|
|
|
|
state->temp_history[state->cur_temp] = temp;
|
|
|
|
state->cur_power = (state->cur_power + 1) % state->count_power;
|
|
|
|
state->power_history[state->cur_power] = power;
|
|
|
|
state->error_history[state->cur_power] = power_target - power;
|
|
|
|
|
|
|
|
/* If first loop, fill the history table */
|
|
|
|
if (state->first) {
|
|
|
|
for (i = 0; i < (state->count_power - 1); i++) {
|
|
|
|
state->cur_power = (state->cur_power + 1) % state->count_power;
|
|
|
|
state->power_history[state->cur_power] = power;
|
|
|
|
state->error_history[state->cur_power] = power_target - power;
|
|
|
|
}
|
|
|
|
for (i = 0; i < (CPU_TEMP_HISTORY_SIZE - 1); i++) {
|
|
|
|
state->cur_temp = (state->cur_temp + 1) % CPU_TEMP_HISTORY_SIZE;
|
|
|
|
state->temp_history[state->cur_temp] = temp;
|
|
|
|
}
|
|
|
|
state->first = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate the integral term normally based on the "power" values */
|
|
|
|
sum = 0;
|
|
|
|
integral = 0;
|
|
|
|
for (i = 0; i < state->count_power; i++)
|
|
|
|
integral += state->error_history[i];
|
|
|
|
integral *= CPU_PID_INTERVAL;
|
|
|
|
DBG(" integral: %08x\n", integral);
|
|
|
|
|
|
|
|
/* Calculate the adjusted input (sense value).
|
|
|
|
* G_r is 12.20
|
|
|
|
* integ is 16.16
|
|
|
|
* so the result is 28.36
|
|
|
|
*
|
|
|
|
* input target is mpu.ttarget, input max is mpu.tmax
|
|
|
|
*/
|
|
|
|
integ_p = ((s64)state->mpu.pid_gr) * (s64)integral;
|
|
|
|
DBG(" integ_p: %d\n", (int)(integ_p >> 36));
|
|
|
|
sval = (state->mpu.tmax << 16) - ((integ_p >> 20) & 0xffffffff);
|
|
|
|
adj_in_target = (state->mpu.ttarget << 16);
|
|
|
|
if (adj_in_target > sval)
|
|
|
|
adj_in_target = sval;
|
|
|
|
DBG(" adj_in_target: %d.%03d, ttarget: %d\n", FIX32TOPRINT(adj_in_target),
|
|
|
|
state->mpu.ttarget);
|
|
|
|
|
|
|
|
/* Calculate the derivative term */
|
|
|
|
derivative = state->temp_history[state->cur_temp] -
|
|
|
|
state->temp_history[(state->cur_temp + CPU_TEMP_HISTORY_SIZE - 1)
|
|
|
|
% CPU_TEMP_HISTORY_SIZE];
|
|
|
|
derivative /= CPU_PID_INTERVAL;
|
|
|
|
deriv_p = ((s64)state->mpu.pid_gd) * (s64)derivative;
|
|
|
|
DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
|
|
|
|
sum += deriv_p;
|
|
|
|
|
|
|
|
/* Calculate the proportional term */
|
|
|
|
proportional = temp - adj_in_target;
|
|
|
|
prop_p = ((s64)state->mpu.pid_gp) * (s64)proportional;
|
|
|
|
DBG(" prop_p: %d\n", (int)(prop_p >> 36));
|
|
|
|
sum += prop_p;
|
|
|
|
|
|
|
|
/* Scale sum */
|
|
|
|
sum >>= 36;
|
|
|
|
|
|
|
|
DBG(" sum: %d\n", (int)sum);
|
|
|
|
state->rpm += (s32)sum;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void do_monitor_cpu_combined(void)
|
|
|
|
{
|
|
|
|
struct cpu_pid_state *state0 = &cpu_state[0];
|
|
|
|
struct cpu_pid_state *state1 = &cpu_state[1];
|
|
|
|
s32 temp0, power0, temp1, power1;
|
|
|
|
s32 temp_combi, power_combi;
|
|
|
|
int rc, intake, pump;
|
|
|
|
|
|
|
|
rc = do_read_one_cpu_values(state0, &temp0, &power0);
|
|
|
|
if (rc < 0) {
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
}
|
|
|
|
state1->overtemp = 0;
|
|
|
|
rc = do_read_one_cpu_values(state1, &temp1, &power1);
|
|
|
|
if (rc < 0) {
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
}
|
|
|
|
if (state1->overtemp)
|
|
|
|
state0->overtemp++;
|
|
|
|
|
|
|
|
temp_combi = max(temp0, temp1);
|
|
|
|
power_combi = max(power0, power1);
|
|
|
|
|
|
|
|
/* Check tmax, increment overtemp if we are there. At tmax+8, we go
|
|
|
|
* full blown immediately and try to trigger a shutdown
|
|
|
|
*/
|
|
|
|
if (temp_combi >= ((state0->mpu.tmax + 8) << 16)) {
|
|
|
|
printk(KERN_WARNING "Warning ! Temperature way above maximum (%d) !\n",
|
|
|
|
temp_combi >> 16);
|
|
|
|
state0->overtemp = CPU_MAX_OVERTEMP;
|
|
|
|
} else if (temp_combi > (state0->mpu.tmax << 16))
|
|
|
|
state0->overtemp++;
|
|
|
|
else
|
|
|
|
state0->overtemp = 0;
|
|
|
|
if (state0->overtemp >= CPU_MAX_OVERTEMP)
|
|
|
|
critical_state = 1;
|
|
|
|
if (state0->overtemp > 0) {
|
|
|
|
state0->rpm = state0->mpu.rmaxn_exhaust_fan;
|
|
|
|
state0->intake_rpm = intake = state0->mpu.rmaxn_intake_fan;
|
|
|
|
pump = state0->pump_min;
|
|
|
|
goto do_set_fans;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Do the PID */
|
|
|
|
do_cpu_pid(state0, temp_combi, power_combi);
|
|
|
|
|
|
|
|
/* Range check */
|
|
|
|
state0->rpm = max(state0->rpm, (int)state0->mpu.rminn_exhaust_fan);
|
|
|
|
state0->rpm = min(state0->rpm, (int)state0->mpu.rmaxn_exhaust_fan);
|
|
|
|
|
|
|
|
/* Calculate intake fan speed */
|
|
|
|
intake = (state0->rpm * CPU_INTAKE_SCALE) >> 16;
|
|
|
|
intake = max(intake, (int)state0->mpu.rminn_intake_fan);
|
|
|
|
intake = min(intake, (int)state0->mpu.rmaxn_intake_fan);
|
|
|
|
state0->intake_rpm = intake;
|
|
|
|
|
|
|
|
/* Calculate pump speed */
|
|
|
|
pump = (state0->rpm * state0->pump_max) /
|
|
|
|
state0->mpu.rmaxn_exhaust_fan;
|
|
|
|
pump = min(pump, state0->pump_max);
|
|
|
|
pump = max(pump, state0->pump_min);
|
|
|
|
|
|
|
|
do_set_fans:
|
|
|
|
/* We copy values from state 0 to state 1 for /sysfs */
|
|
|
|
state1->rpm = state0->rpm;
|
|
|
|
state1->intake_rpm = state0->intake_rpm;
|
|
|
|
|
|
|
|
DBG("** CPU %d RPM: %d Ex, %d, Pump: %d, In, overtemp: %d\n",
|
|
|
|
state1->index, (int)state1->rpm, intake, pump, state1->overtemp);
|
|
|
|
|
|
|
|
/* We should check for errors, shouldn't we ? But then, what
|
|
|
|
* do we do once the error occurs ? For FCU notified fan
|
|
|
|
* failures (-EFAULT) we probably want to notify userland
|
|
|
|
* some way...
|
|
|
|
*/
|
|
|
|
set_rpm_fan(CPUA_INTAKE_FAN_RPM_INDEX, intake);
|
|
|
|
set_rpm_fan(CPUA_EXHAUST_FAN_RPM_INDEX, state0->rpm);
|
|
|
|
set_rpm_fan(CPUB_INTAKE_FAN_RPM_INDEX, intake);
|
|
|
|
set_rpm_fan(CPUB_EXHAUST_FAN_RPM_INDEX, state0->rpm);
|
|
|
|
|
|
|
|
if (fcu_fans[CPUA_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID)
|
|
|
|
set_rpm_fan(CPUA_PUMP_RPM_INDEX, pump);
|
|
|
|
if (fcu_fans[CPUB_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID)
|
|
|
|
set_rpm_fan(CPUB_PUMP_RPM_INDEX, pump);
|
|
|
|
}
|
|
|
|
|
|
|
|
static void do_monitor_cpu_split(struct cpu_pid_state *state)
|
|
|
|
{
|
|
|
|
s32 temp, power;
|
|
|
|
int rc, intake;
|
|
|
|
|
|
|
|
/* Read current fan status */
|
|
|
|
rc = do_read_one_cpu_values(state, &temp, &power);
|
|
|
|
if (rc < 0) {
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check tmax, increment overtemp if we are there. At tmax+8, we go
|
|
|
|
* full blown immediately and try to trigger a shutdown
|
|
|
|
*/
|
|
|
|
if (temp >= ((state->mpu.tmax + 8) << 16)) {
|
|
|
|
printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
|
|
|
|
" (%d) !\n",
|
|
|
|
state->index, temp >> 16);
|
|
|
|
state->overtemp = CPU_MAX_OVERTEMP;
|
|
|
|
} else if (temp > (state->mpu.tmax << 16))
|
|
|
|
state->overtemp++;
|
|
|
|
else
|
|
|
|
state->overtemp = 0;
|
|
|
|
if (state->overtemp >= CPU_MAX_OVERTEMP)
|
|
|
|
critical_state = 1;
|
|
|
|
if (state->overtemp > 0) {
|
|
|
|
state->rpm = state->mpu.rmaxn_exhaust_fan;
|
|
|
|
state->intake_rpm = intake = state->mpu.rmaxn_intake_fan;
|
|
|
|
goto do_set_fans;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Do the PID */
|
|
|
|
do_cpu_pid(state, temp, power);
|
|
|
|
|
|
|
|
/* Range check */
|
|
|
|
state->rpm = max(state->rpm, (int)state->mpu.rminn_exhaust_fan);
|
|
|
|
state->rpm = min(state->rpm, (int)state->mpu.rmaxn_exhaust_fan);
|
|
|
|
|
|
|
|
/* Calculate intake fan */
|
|
|
|
intake = (state->rpm * CPU_INTAKE_SCALE) >> 16;
|
|
|
|
intake = max(intake, (int)state->mpu.rminn_intake_fan);
|
|
|
|
intake = min(intake, (int)state->mpu.rmaxn_intake_fan);
|
|
|
|
state->intake_rpm = intake;
|
|
|
|
|
|
|
|
do_set_fans:
|
|
|
|
DBG("** CPU %d RPM: %d Ex, %d In, overtemp: %d\n",
|
|
|
|
state->index, (int)state->rpm, intake, state->overtemp);
|
|
|
|
|
|
|
|
/* We should check for errors, shouldn't we ? But then, what
|
|
|
|
* do we do once the error occurs ? For FCU notified fan
|
|
|
|
* failures (-EFAULT) we probably want to notify userland
|
|
|
|
* some way...
|
|
|
|
*/
|
|
|
|
if (state->index == 0) {
|
|
|
|
set_rpm_fan(CPUA_INTAKE_FAN_RPM_INDEX, intake);
|
|
|
|
set_rpm_fan(CPUA_EXHAUST_FAN_RPM_INDEX, state->rpm);
|
|
|
|
} else {
|
|
|
|
set_rpm_fan(CPUB_INTAKE_FAN_RPM_INDEX, intake);
|
|
|
|
set_rpm_fan(CPUB_EXHAUST_FAN_RPM_INDEX, state->rpm);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
static void do_monitor_cpu_rack(struct cpu_pid_state *state)
|
|
|
|
{
|
|
|
|
s32 temp, power, fan_min;
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
/* Read current fan status */
|
|
|
|
rc = do_read_one_cpu_values(state, &temp, &power);
|
|
|
|
if (rc < 0) {
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check tmax, increment overtemp if we are there. At tmax+8, we go
|
|
|
|
* full blown immediately and try to trigger a shutdown
|
|
|
|
*/
|
|
|
|
if (temp >= ((state->mpu.tmax + 8) << 16)) {
|
|
|
|
printk(KERN_WARNING "Warning ! CPU %d temperature way above maximum"
|
|
|
|
" (%d) !\n",
|
|
|
|
state->index, temp >> 16);
|
|
|
|
state->overtemp = CPU_MAX_OVERTEMP;
|
|
|
|
} else if (temp > (state->mpu.tmax << 16))
|
|
|
|
state->overtemp++;
|
|
|
|
else
|
|
|
|
state->overtemp = 0;
|
|
|
|
if (state->overtemp >= CPU_MAX_OVERTEMP)
|
|
|
|
critical_state = 1;
|
|
|
|
if (state->overtemp > 0) {
|
|
|
|
state->rpm = state->intake_rpm = state->mpu.rmaxn_intake_fan;
|
|
|
|
goto do_set_fans;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Do the PID */
|
|
|
|
do_cpu_pid(state, temp, power);
|
|
|
|
|
|
|
|
/* Check clamp from dimms */
|
|
|
|
fan_min = dimm_output_clamp;
|
|
|
|
fan_min = max(fan_min, (int)state->mpu.rminn_intake_fan);
|
|
|
|
|
|
|
|
state->rpm = max(state->rpm, (int)fan_min);
|
|
|
|
state->rpm = min(state->rpm, (int)state->mpu.rmaxn_intake_fan);
|
|
|
|
state->intake_rpm = state->rpm;
|
|
|
|
|
|
|
|
do_set_fans:
|
|
|
|
DBG("** CPU %d RPM: %d overtemp: %d\n",
|
|
|
|
state->index, (int)state->rpm, state->overtemp);
|
|
|
|
|
|
|
|
/* We should check for errors, shouldn't we ? But then, what
|
|
|
|
* do we do once the error occurs ? For FCU notified fan
|
|
|
|
* failures (-EFAULT) we probably want to notify userland
|
|
|
|
* some way...
|
|
|
|
*/
|
|
|
|
if (state->index == 0) {
|
|
|
|
set_rpm_fan(CPU_A1_FAN_RPM_INDEX, state->rpm);
|
|
|
|
set_rpm_fan(CPU_A2_FAN_RPM_INDEX, state->rpm);
|
|
|
|
set_rpm_fan(CPU_A3_FAN_RPM_INDEX, state->rpm);
|
|
|
|
} else {
|
|
|
|
set_rpm_fan(CPU_B1_FAN_RPM_INDEX, state->rpm);
|
|
|
|
set_rpm_fan(CPU_B2_FAN_RPM_INDEX, state->rpm);
|
|
|
|
set_rpm_fan(CPU_B3_FAN_RPM_INDEX, state->rpm);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize the state structure for one CPU control loop
|
|
|
|
*/
|
|
|
|
static int init_cpu_state(struct cpu_pid_state *state, int index)
|
|
|
|
{
|
|
|
|
state->index = index;
|
|
|
|
state->first = 1;
|
|
|
|
state->rpm = (cpu_pid_type == CPU_PID_TYPE_RACKMAC) ? 4000 : 1000;
|
|
|
|
state->overtemp = 0;
|
|
|
|
state->adc_config = 0x00;
|
|
|
|
|
|
|
|
|
|
|
|
if (index == 0)
|
|
|
|
state->monitor = attach_i2c_chip(SUPPLY_MONITOR_ID, "CPU0_monitor");
|
|
|
|
else if (index == 1)
|
|
|
|
state->monitor = attach_i2c_chip(SUPPLY_MONITORB_ID, "CPU1_monitor");
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
if (read_eeprom(index, &state->mpu))
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
state->count_power = state->mpu.tguardband;
|
|
|
|
if (state->count_power > CPU_POWER_HISTORY_SIZE) {
|
|
|
|
printk(KERN_WARNING "Warning ! too many power history slots\n");
|
|
|
|
state->count_power = CPU_POWER_HISTORY_SIZE;
|
|
|
|
}
|
|
|
|
DBG("CPU %d Using %d power history entries\n", index, state->count_power);
|
|
|
|
|
|
|
|
if (index == 0) {
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu0_temperature);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu0_voltage);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu0_current);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu0_exhaust_fan_rpm);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu0_intake_fan_rpm);
|
|
|
|
} else {
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu1_temperature);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu1_voltage);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu1_current);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu1_exhaust_fan_rpm);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
|
|
|
|
}
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
|
|
if (state->monitor)
|
|
|
|
detach_i2c_chip(state->monitor);
|
|
|
|
state->monitor = NULL;
|
|
|
|
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dispose of the state data for one CPU control loop
|
|
|
|
*/
|
|
|
|
static void dispose_cpu_state(struct cpu_pid_state *state)
|
|
|
|
{
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
if (state->index == 0) {
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu0_temperature);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu0_voltage);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu0_current);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu0_exhaust_fan_rpm);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu0_intake_fan_rpm);
|
|
|
|
} else {
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu1_temperature);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu1_voltage);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu1_current);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu1_exhaust_fan_rpm);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_cpu1_intake_fan_rpm);
|
|
|
|
}
|
|
|
|
|
|
|
|
detach_i2c_chip(state->monitor);
|
|
|
|
state->monitor = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Motherboard backside & U3 heatsink fan control loop
|
|
|
|
*/
|
|
|
|
static void do_monitor_backside(struct backside_pid_state *state)
|
|
|
|
{
|
|
|
|
s32 temp, integral, derivative, fan_min;
|
|
|
|
s64 integ_p, deriv_p, prop_p, sum;
|
|
|
|
int i, rc;
|
|
|
|
|
|
|
|
if (--state->ticks != 0)
|
|
|
|
return;
|
|
|
|
state->ticks = backside_params.interval;
|
|
|
|
|
|
|
|
DBG("backside:\n");
|
|
|
|
|
|
|
|
/* Check fan status */
|
|
|
|
rc = get_pwm_fan(BACKSIDE_FAN_PWM_INDEX);
|
|
|
|
if (rc < 0) {
|
|
|
|
printk(KERN_WARNING "Error %d reading backside fan !\n", rc);
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
} else
|
|
|
|
state->pwm = rc;
|
|
|
|
DBG(" current pwm: %d\n", state->pwm);
|
|
|
|
|
|
|
|
/* Get some sensor readings */
|
|
|
|
temp = i2c_smbus_read_byte_data(state->monitor, MAX6690_EXT_TEMP) << 16;
|
|
|
|
state->last_temp = temp;
|
|
|
|
DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
|
|
|
|
FIX32TOPRINT(backside_params.input_target));
|
|
|
|
|
|
|
|
/* Store temperature and error in history array */
|
|
|
|
state->cur_sample = (state->cur_sample + 1) % BACKSIDE_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] = temp - backside_params.input_target;
|
|
|
|
|
|
|
|
/* If first loop, fill the history table */
|
|
|
|
if (state->first) {
|
|
|
|
for (i = 0; i < (BACKSIDE_PID_HISTORY_SIZE - 1); i++) {
|
|
|
|
state->cur_sample = (state->cur_sample + 1) %
|
|
|
|
BACKSIDE_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] =
|
|
|
|
temp - backside_params.input_target;
|
|
|
|
}
|
|
|
|
state->first = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate the integral term */
|
|
|
|
sum = 0;
|
|
|
|
integral = 0;
|
|
|
|
for (i = 0; i < BACKSIDE_PID_HISTORY_SIZE; i++)
|
|
|
|
integral += state->error_history[i];
|
|
|
|
integral *= backside_params.interval;
|
|
|
|
DBG(" integral: %08x\n", integral);
|
|
|
|
integ_p = ((s64)backside_params.G_r) * (s64)integral;
|
|
|
|
DBG(" integ_p: %d\n", (int)(integ_p >> 36));
|
|
|
|
sum += integ_p;
|
|
|
|
|
|
|
|
/* Calculate the derivative term */
|
|
|
|
derivative = state->error_history[state->cur_sample] -
|
|
|
|
state->error_history[(state->cur_sample + BACKSIDE_PID_HISTORY_SIZE - 1)
|
|
|
|
% BACKSIDE_PID_HISTORY_SIZE];
|
|
|
|
derivative /= backside_params.interval;
|
|
|
|
deriv_p = ((s64)backside_params.G_d) * (s64)derivative;
|
|
|
|
DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
|
|
|
|
sum += deriv_p;
|
|
|
|
|
|
|
|
/* Calculate the proportional term */
|
|
|
|
prop_p = ((s64)backside_params.G_p) * (s64)(state->error_history[state->cur_sample]);
|
|
|
|
DBG(" prop_p: %d\n", (int)(prop_p >> 36));
|
|
|
|
sum += prop_p;
|
|
|
|
|
|
|
|
/* Scale sum */
|
|
|
|
sum >>= 36;
|
|
|
|
|
|
|
|
DBG(" sum: %d\n", (int)sum);
|
|
|
|
if (backside_params.additive)
|
|
|
|
state->pwm += (s32)sum;
|
|
|
|
else
|
|
|
|
state->pwm = sum;
|
|
|
|
|
|
|
|
/* Check for clamp */
|
|
|
|
fan_min = (dimm_output_clamp * 100) / 14000;
|
|
|
|
fan_min = max(fan_min, backside_params.output_min);
|
|
|
|
|
|
|
|
state->pwm = max(state->pwm, fan_min);
|
|
|
|
state->pwm = min(state->pwm, backside_params.output_max);
|
|
|
|
|
|
|
|
DBG("** BACKSIDE PWM: %d\n", (int)state->pwm);
|
|
|
|
set_pwm_fan(BACKSIDE_FAN_PWM_INDEX, state->pwm);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize the state structure for the backside fan control loop
|
|
|
|
*/
|
|
|
|
static int init_backside_state(struct backside_pid_state *state)
|
|
|
|
{
|
|
|
|
struct device_node *u3;
|
|
|
|
int u3h = 1; /* conservative by default */
|
|
|
|
|
|
|
|
/*
|
|
|
|
* There are different PID params for machines with U3 and machines
|
|
|
|
* with U3H, pick the right ones now
|
|
|
|
*/
|
|
|
|
u3 = of_find_node_by_path("/u3@0,f8000000");
|
|
|
|
if (u3 != NULL) {
|
|
|
|
u32 *vers = (u32 *)get_property(u3, "device-rev", NULL);
|
|
|
|
if (vers)
|
|
|
|
if (((*vers) & 0x3f) < 0x34)
|
|
|
|
u3h = 0;
|
|
|
|
of_node_put(u3);
|
|
|
|
}
|
|
|
|
|
|
|
|
if (rackmac) {
|
|
|
|
backside_params.G_d = BACKSIDE_PID_RACK_G_d;
|
|
|
|
backside_params.input_target = BACKSIDE_PID_RACK_INPUT_TARGET;
|
|
|
|
backside_params.output_min = BACKSIDE_PID_U3H_OUTPUT_MIN;
|
|
|
|
backside_params.interval = BACKSIDE_PID_RACK_INTERVAL;
|
|
|
|
backside_params.G_p = BACKSIDE_PID_RACK_G_p;
|
|
|
|
backside_params.G_r = BACKSIDE_PID_G_r;
|
|
|
|
backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
|
|
|
|
backside_params.additive = 0;
|
|
|
|
} else if (u3h) {
|
|
|
|
backside_params.G_d = BACKSIDE_PID_U3H_G_d;
|
|
|
|
backside_params.input_target = BACKSIDE_PID_U3H_INPUT_TARGET;
|
|
|
|
backside_params.output_min = BACKSIDE_PID_U3H_OUTPUT_MIN;
|
|
|
|
backside_params.interval = BACKSIDE_PID_INTERVAL;
|
|
|
|
backside_params.G_p = BACKSIDE_PID_G_p;
|
|
|
|
backside_params.G_r = BACKSIDE_PID_G_r;
|
|
|
|
backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
|
|
|
|
backside_params.additive = 1;
|
|
|
|
} else {
|
|
|
|
backside_params.G_d = BACKSIDE_PID_U3_G_d;
|
|
|
|
backside_params.input_target = BACKSIDE_PID_U3_INPUT_TARGET;
|
|
|
|
backside_params.output_min = BACKSIDE_PID_U3_OUTPUT_MIN;
|
|
|
|
backside_params.interval = BACKSIDE_PID_INTERVAL;
|
|
|
|
backside_params.G_p = BACKSIDE_PID_G_p;
|
|
|
|
backside_params.G_r = BACKSIDE_PID_G_r;
|
|
|
|
backside_params.output_max = BACKSIDE_PID_OUTPUT_MAX;
|
|
|
|
backside_params.additive = 1;
|
|
|
|
}
|
|
|
|
|
|
|
|
state->ticks = 1;
|
|
|
|
state->first = 1;
|
|
|
|
state->pwm = 50;
|
|
|
|
|
|
|
|
state->monitor = attach_i2c_chip(BACKSIDE_MAX_ID, "backside_temp");
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_backside_temperature);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dispose of the state data for the backside control loop
|
|
|
|
*/
|
|
|
|
static void dispose_backside_state(struct backside_pid_state *state)
|
|
|
|
{
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_backside_temperature);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_backside_fan_pwm);
|
|
|
|
|
|
|
|
detach_i2c_chip(state->monitor);
|
|
|
|
state->monitor = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Drives bay fan control loop
|
|
|
|
*/
|
|
|
|
static void do_monitor_drives(struct drives_pid_state *state)
|
|
|
|
{
|
|
|
|
s32 temp, integral, derivative;
|
|
|
|
s64 integ_p, deriv_p, prop_p, sum;
|
|
|
|
int i, rc;
|
|
|
|
|
|
|
|
if (--state->ticks != 0)
|
|
|
|
return;
|
|
|
|
state->ticks = DRIVES_PID_INTERVAL;
|
|
|
|
|
|
|
|
DBG("drives:\n");
|
|
|
|
|
|
|
|
/* Check fan status */
|
|
|
|
rc = get_rpm_fan(DRIVES_FAN_RPM_INDEX, !RPM_PID_USE_ACTUAL_SPEED);
|
|
|
|
if (rc < 0) {
|
|
|
|
printk(KERN_WARNING "Error %d reading drives fan !\n", rc);
|
|
|
|
/* XXX What do we do now ? */
|
|
|
|
} else
|
|
|
|
state->rpm = rc;
|
|
|
|
DBG(" current rpm: %d\n", state->rpm);
|
|
|
|
|
|
|
|
/* Get some sensor readings */
|
|
|
|
temp = le16_to_cpu(i2c_smbus_read_word_data(state->monitor, DS1775_TEMP)) << 8;
|
|
|
|
state->last_temp = temp;
|
|
|
|
DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
|
|
|
|
FIX32TOPRINT(DRIVES_PID_INPUT_TARGET));
|
|
|
|
|
|
|
|
/* Store temperature and error in history array */
|
|
|
|
state->cur_sample = (state->cur_sample + 1) % DRIVES_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] = temp - DRIVES_PID_INPUT_TARGET;
|
|
|
|
|
|
|
|
/* If first loop, fill the history table */
|
|
|
|
if (state->first) {
|
|
|
|
for (i = 0; i < (DRIVES_PID_HISTORY_SIZE - 1); i++) {
|
|
|
|
state->cur_sample = (state->cur_sample + 1) %
|
|
|
|
DRIVES_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] =
|
|
|
|
temp - DRIVES_PID_INPUT_TARGET;
|
|
|
|
}
|
|
|
|
state->first = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate the integral term */
|
|
|
|
sum = 0;
|
|
|
|
integral = 0;
|
|
|
|
for (i = 0; i < DRIVES_PID_HISTORY_SIZE; i++)
|
|
|
|
integral += state->error_history[i];
|
|
|
|
integral *= DRIVES_PID_INTERVAL;
|
|
|
|
DBG(" integral: %08x\n", integral);
|
|
|
|
integ_p = ((s64)DRIVES_PID_G_r) * (s64)integral;
|
|
|
|
DBG(" integ_p: %d\n", (int)(integ_p >> 36));
|
|
|
|
sum += integ_p;
|
|
|
|
|
|
|
|
/* Calculate the derivative term */
|
|
|
|
derivative = state->error_history[state->cur_sample] -
|
|
|
|
state->error_history[(state->cur_sample + DRIVES_PID_HISTORY_SIZE - 1)
|
|
|
|
% DRIVES_PID_HISTORY_SIZE];
|
|
|
|
derivative /= DRIVES_PID_INTERVAL;
|
|
|
|
deriv_p = ((s64)DRIVES_PID_G_d) * (s64)derivative;
|
|
|
|
DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
|
|
|
|
sum += deriv_p;
|
|
|
|
|
|
|
|
/* Calculate the proportional term */
|
|
|
|
prop_p = ((s64)DRIVES_PID_G_p) * (s64)(state->error_history[state->cur_sample]);
|
|
|
|
DBG(" prop_p: %d\n", (int)(prop_p >> 36));
|
|
|
|
sum += prop_p;
|
|
|
|
|
|
|
|
/* Scale sum */
|
|
|
|
sum >>= 36;
|
|
|
|
|
|
|
|
DBG(" sum: %d\n", (int)sum);
|
|
|
|
state->rpm += (s32)sum;
|
|
|
|
|
|
|
|
state->rpm = max(state->rpm, DRIVES_PID_OUTPUT_MIN);
|
|
|
|
state->rpm = min(state->rpm, DRIVES_PID_OUTPUT_MAX);
|
|
|
|
|
|
|
|
DBG("** DRIVES RPM: %d\n", (int)state->rpm);
|
|
|
|
set_rpm_fan(DRIVES_FAN_RPM_INDEX, state->rpm);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize the state structure for the drives bay fan control loop
|
|
|
|
*/
|
|
|
|
static int init_drives_state(struct drives_pid_state *state)
|
|
|
|
{
|
|
|
|
state->ticks = 1;
|
|
|
|
state->first = 1;
|
|
|
|
state->rpm = 1000;
|
|
|
|
|
|
|
|
state->monitor = attach_i2c_chip(DRIVES_DALLAS_ID, "drives_temp");
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_drives_temperature);
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dispose of the state data for the drives control loop
|
|
|
|
*/
|
|
|
|
static void dispose_drives_state(struct drives_pid_state *state)
|
|
|
|
{
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_drives_temperature);
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_drives_fan_rpm);
|
|
|
|
|
|
|
|
detach_i2c_chip(state->monitor);
|
|
|
|
state->monitor = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* DIMMs temp control loop
|
|
|
|
*/
|
|
|
|
static void do_monitor_dimms(struct dimm_pid_state *state)
|
|
|
|
{
|
|
|
|
s32 temp, integral, derivative, fan_min;
|
|
|
|
s64 integ_p, deriv_p, prop_p, sum;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
if (--state->ticks != 0)
|
|
|
|
return;
|
|
|
|
state->ticks = DIMM_PID_INTERVAL;
|
|
|
|
|
|
|
|
DBG("DIMM:\n");
|
|
|
|
|
|
|
|
DBG(" current value: %d\n", state->output);
|
|
|
|
|
|
|
|
temp = read_lm87_reg(state->monitor, LM87_INT_TEMP);
|
|
|
|
if (temp < 0)
|
|
|
|
return;
|
|
|
|
temp <<= 16;
|
|
|
|
state->last_temp = temp;
|
|
|
|
DBG(" temp: %d.%03d, target: %d.%03d\n", FIX32TOPRINT(temp),
|
|
|
|
FIX32TOPRINT(DIMM_PID_INPUT_TARGET));
|
|
|
|
|
|
|
|
/* Store temperature and error in history array */
|
|
|
|
state->cur_sample = (state->cur_sample + 1) % DIMM_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] = temp - DIMM_PID_INPUT_TARGET;
|
|
|
|
|
|
|
|
/* If first loop, fill the history table */
|
|
|
|
if (state->first) {
|
|
|
|
for (i = 0; i < (DIMM_PID_HISTORY_SIZE - 1); i++) {
|
|
|
|
state->cur_sample = (state->cur_sample + 1) %
|
|
|
|
DIMM_PID_HISTORY_SIZE;
|
|
|
|
state->sample_history[state->cur_sample] = temp;
|
|
|
|
state->error_history[state->cur_sample] =
|
|
|
|
temp - DIMM_PID_INPUT_TARGET;
|
|
|
|
}
|
|
|
|
state->first = 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Calculate the integral term */
|
|
|
|
sum = 0;
|
|
|
|
integral = 0;
|
|
|
|
for (i = 0; i < DIMM_PID_HISTORY_SIZE; i++)
|
|
|
|
integral += state->error_history[i];
|
|
|
|
integral *= DIMM_PID_INTERVAL;
|
|
|
|
DBG(" integral: %08x\n", integral);
|
|
|
|
integ_p = ((s64)DIMM_PID_G_r) * (s64)integral;
|
|
|
|
DBG(" integ_p: %d\n", (int)(integ_p >> 36));
|
|
|
|
sum += integ_p;
|
|
|
|
|
|
|
|
/* Calculate the derivative term */
|
|
|
|
derivative = state->error_history[state->cur_sample] -
|
|
|
|
state->error_history[(state->cur_sample + DIMM_PID_HISTORY_SIZE - 1)
|
|
|
|
% DIMM_PID_HISTORY_SIZE];
|
|
|
|
derivative /= DIMM_PID_INTERVAL;
|
|
|
|
deriv_p = ((s64)DIMM_PID_G_d) * (s64)derivative;
|
|
|
|
DBG(" deriv_p: %d\n", (int)(deriv_p >> 36));
|
|
|
|
sum += deriv_p;
|
|
|
|
|
|
|
|
/* Calculate the proportional term */
|
|
|
|
prop_p = ((s64)DIMM_PID_G_p) * (s64)(state->error_history[state->cur_sample]);
|
|
|
|
DBG(" prop_p: %d\n", (int)(prop_p >> 36));
|
|
|
|
sum += prop_p;
|
|
|
|
|
|
|
|
/* Scale sum */
|
|
|
|
sum >>= 36;
|
|
|
|
|
|
|
|
DBG(" sum: %d\n", (int)sum);
|
|
|
|
state->output = (s32)sum;
|
|
|
|
state->output = max(state->output, DIMM_PID_OUTPUT_MIN);
|
|
|
|
state->output = min(state->output, DIMM_PID_OUTPUT_MAX);
|
|
|
|
dimm_output_clamp = state->output;
|
|
|
|
|
|
|
|
DBG("** DIMM clamp value: %d\n", (int)state->output);
|
|
|
|
|
|
|
|
/* Backside PID is only every 5 seconds, force backside fan clamping now */
|
|
|
|
fan_min = (dimm_output_clamp * 100) / 14000;
|
|
|
|
fan_min = max(fan_min, backside_params.output_min);
|
|
|
|
if (backside_state.pwm < fan_min) {
|
|
|
|
backside_state.pwm = fan_min;
|
|
|
|
DBG(" -> applying clamp to backside fan now: %d !\n", fan_min);
|
|
|
|
set_pwm_fan(BACKSIDE_FAN_PWM_INDEX, fan_min);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Initialize the state structure for the DIMM temp control loop
|
|
|
|
*/
|
|
|
|
static int init_dimms_state(struct dimm_pid_state *state)
|
|
|
|
{
|
|
|
|
state->ticks = 1;
|
|
|
|
state->first = 1;
|
|
|
|
state->output = 4000;
|
|
|
|
|
|
|
|
state->monitor = attach_i2c_chip(XSERVE_DIMMS_LM87, "dimms_temp");
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
device_create_file(&of_dev->dev, &dev_attr_dimms_temperature);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dispose of the state data for the drives control loop
|
|
|
|
*/
|
|
|
|
static void dispose_dimms_state(struct dimm_pid_state *state)
|
|
|
|
{
|
|
|
|
if (state->monitor == NULL)
|
|
|
|
return;
|
|
|
|
|
|
|
|
device_remove_file(&of_dev->dev, &dev_attr_dimms_temperature);
|
|
|
|
|
|
|
|
detach_i2c_chip(state->monitor);
|
|
|
|
state->monitor = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int call_critical_overtemp(void)
|
|
|
|
{
|
|
|
|
char *argv[] = { critical_overtemp_path, NULL };
|
|
|
|
static char *envp[] = { "HOME=/",
|
|
|
|
"TERM=linux",
|
|
|
|
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
|
|
|
|
NULL };
|
|
|
|
|
|
|
|
return call_usermodehelper(critical_overtemp_path, argv, envp, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Here's the kernel thread that calls the various control loops
|
|
|
|
*/
|
|
|
|
static int main_control_loop(void *x)
|
|
|
|
{
|
|
|
|
daemonize("kfand");
|
|
|
|
|
|
|
|
DBG("main_control_loop started\n");
|
|
|
|
|
|
|
|
down(&driver_lock);
|
|
|
|
|
|
|
|
if (start_fcu() < 0) {
|
|
|
|
printk(KERN_ERR "kfand: failed to start FCU\n");
|
|
|
|
up(&driver_lock);
|
|
|
|
goto out;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Set the PCI fan once for now */
|
|
|
|
set_pwm_fan(SLOTS_FAN_PWM_INDEX, SLOTS_FAN_DEFAULT_PWM);
|
|
|
|
|
|
|
|
/* Initialize ADCs */
|
|
|
|
initialize_adc(&cpu_state[0]);
|
|
|
|
if (cpu_state[1].monitor != NULL)
|
|
|
|
initialize_adc(&cpu_state[1]);
|
|
|
|
|
|
|
|
up(&driver_lock);
|
|
|
|
|
|
|
|
while (state == state_attached) {
|
|
|
|
unsigned long elapsed, start;
|
|
|
|
|
|
|
|
start = jiffies;
|
|
|
|
|
|
|
|
down(&driver_lock);
|
|
|
|
|
|
|
|
/* First, we always calculate the new DIMMs state on an Xserve */
|
|
|
|
if (rackmac)
|
|
|
|
do_monitor_dimms(&dimms_state);
|
|
|
|
|
|
|
|
/* Then, the CPUs */
|
|
|
|
if (cpu_pid_type == CPU_PID_TYPE_COMBINED)
|
|
|
|
do_monitor_cpu_combined();
|
|
|
|
else if (cpu_pid_type == CPU_PID_TYPE_RACKMAC) {
|
|
|
|
do_monitor_cpu_rack(&cpu_state[0]);
|
|
|
|
if (cpu_state[1].monitor != NULL)
|
|
|
|
do_monitor_cpu_rack(&cpu_state[1]);
|
|
|
|
// better deal with UP
|
|
|
|
} else {
|
|
|
|
do_monitor_cpu_split(&cpu_state[0]);
|
|
|
|
if (cpu_state[1].monitor != NULL)
|
|
|
|
do_monitor_cpu_split(&cpu_state[1]);
|
|
|
|
// better deal with UP
|
|
|
|
}
|
|
|
|
/* Then, the rest */
|
|
|
|
do_monitor_backside(&backside_state);
|
|
|
|
if (!rackmac)
|
|
|
|
do_monitor_drives(&drives_state);
|
|
|
|
up(&driver_lock);
|
|
|
|
|
|
|
|
if (critical_state == 1) {
|
|
|
|
printk(KERN_WARNING "Temperature control detected a critical condition\n");
|
|
|
|
printk(KERN_WARNING "Attempting to shut down...\n");
|
|
|
|
if (call_critical_overtemp()) {
|
|
|
|
printk(KERN_WARNING "Can't call %s, power off now!\n",
|
|
|
|
critical_overtemp_path);
|
|
|
|
machine_power_off();
|
|
|
|
}
|
|
|
|
}
|
|
|
|
if (critical_state > 0)
|
|
|
|
critical_state++;
|
|
|
|
if (critical_state > MAX_CRITICAL_STATE) {
|
|
|
|
printk(KERN_WARNING "Shutdown timed out, power off now !\n");
|
|
|
|
machine_power_off();
|
|
|
|
}
|
|
|
|
|
|
|
|
// FIXME: Deal with signals
|
|
|
|
elapsed = jiffies - start;
|
|
|
|
if (elapsed < HZ)
|
2005-11-07 10:01:17 +01:00
|
|
|
schedule_timeout_interruptible(HZ - elapsed);
|
2005-04-17 00:20:36 +02:00
|
|
|
}
|
|
|
|
|
|
|
|
out:
|
|
|
|
DBG("main_control_loop ended\n");
|
|
|
|
|
|
|
|
ctrl_task = 0;
|
|
|
|
complete_and_exit(&ctrl_complete, 0);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Dispose the control loops when tearing down
|
|
|
|
*/
|
|
|
|
static void dispose_control_loops(void)
|
|
|
|
{
|
|
|
|
dispose_cpu_state(&cpu_state[0]);
|
|
|
|
dispose_cpu_state(&cpu_state[1]);
|
|
|
|
dispose_backside_state(&backside_state);
|
|
|
|
dispose_drives_state(&drives_state);
|
|
|
|
dispose_dimms_state(&dimms_state);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Create the control loops. U3-0 i2c bus is up, so we can now
|
|
|
|
* get to the various sensors
|
|
|
|
*/
|
|
|
|
static int create_control_loops(void)
|
|
|
|
{
|
|
|
|
struct device_node *np;
|
|
|
|
|
|
|
|
/* Count CPUs from the device-tree, we don't care how many are
|
|
|
|
* actually used by Linux
|
|
|
|
*/
|
|
|
|
cpu_count = 0;
|
|
|
|
for (np = NULL; NULL != (np = of_find_node_by_type(np, "cpu"));)
|
|
|
|
cpu_count++;
|
|
|
|
|
|
|
|
DBG("counted %d CPUs in the device-tree\n", cpu_count);
|
|
|
|
|
|
|
|
/* Decide the type of PID algorithm to use based on the presence of
|
|
|
|
* the pumps, though that may not be the best way, that is good enough
|
|
|
|
* for now
|
|
|
|
*/
|
|
|
|
if (rackmac)
|
|
|
|
cpu_pid_type = CPU_PID_TYPE_RACKMAC;
|
|
|
|
else if (machine_is_compatible("PowerMac7,3")
|
|
|
|
&& (cpu_count > 1)
|
|
|
|
&& fcu_fans[CPUA_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID
|
|
|
|
&& fcu_fans[CPUB_PUMP_RPM_INDEX].id != FCU_FAN_ABSENT_ID) {
|
|
|
|
printk(KERN_INFO "Liquid cooling pumps detected, using new algorithm !\n");
|
|
|
|
cpu_pid_type = CPU_PID_TYPE_COMBINED;
|
|
|
|
} else
|
|
|
|
cpu_pid_type = CPU_PID_TYPE_SPLIT;
|
|
|
|
|
|
|
|
/* Create control loops for everything. If any fail, everything
|
|
|
|
* fails
|
|
|
|
*/
|
|
|
|
if (init_cpu_state(&cpu_state[0], 0))
|
|
|
|
goto fail;
|
|
|
|
if (cpu_pid_type == CPU_PID_TYPE_COMBINED)
|
|
|
|
fetch_cpu_pumps_minmax();
|
|
|
|
|
|
|
|
if (cpu_count > 1 && init_cpu_state(&cpu_state[1], 1))
|
|
|
|
goto fail;
|
|
|
|
if (init_backside_state(&backside_state))
|
|
|
|
goto fail;
|
|
|
|
if (rackmac && init_dimms_state(&dimms_state))
|
|
|
|
goto fail;
|
|
|
|
if (!rackmac && init_drives_state(&drives_state))
|
|
|
|
goto fail;
|
|
|
|
|
|
|
|
DBG("all control loops up !\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
|
|
|
|
fail:
|
|
|
|
DBG("failure creating control loops, disposing\n");
|
|
|
|
|
|
|
|
dispose_control_loops();
|
|
|
|
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Start the control loops after everything is up, that is create
|
|
|
|
* the thread that will make them run
|
|
|
|
*/
|
|
|
|
static void start_control_loops(void)
|
|
|
|
{
|
|
|
|
init_completion(&ctrl_complete);
|
|
|
|
|
|
|
|
ctrl_task = kernel_thread(main_control_loop, NULL, SIGCHLD | CLONE_KERNEL);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Stop the control loops when tearing down
|
|
|
|
*/
|
|
|
|
static void stop_control_loops(void)
|
|
|
|
{
|
|
|
|
if (ctrl_task != 0)
|
|
|
|
wait_for_completion(&ctrl_complete);
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Attach to the i2c FCU after detecting U3-1 bus
|
|
|
|
*/
|
|
|
|
static int attach_fcu(void)
|
|
|
|
{
|
|
|
|
fcu = attach_i2c_chip(FAN_CTRLER_ID, "fcu");
|
|
|
|
if (fcu == NULL)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
DBG("FCU attached\n");
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Detach from the i2c FCU when tearing down
|
|
|
|
*/
|
|
|
|
static void detach_fcu(void)
|
|
|
|
{
|
|
|
|
if (fcu)
|
|
|
|
detach_i2c_chip(fcu);
|
|
|
|
fcu = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Attach to the i2c controller. We probe the various chips based
|
|
|
|
* on the device-tree nodes and build everything for the driver to
|
|
|
|
* run, we then kick the driver monitoring thread
|
|
|
|
*/
|
|
|
|
static int therm_pm72_attach(struct i2c_adapter *adapter)
|
|
|
|
{
|
|
|
|
down(&driver_lock);
|
|
|
|
|
|
|
|
/* Check state */
|
|
|
|
if (state == state_detached)
|
|
|
|
state = state_attaching;
|
|
|
|
if (state != state_attaching) {
|
|
|
|
up(&driver_lock);
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Check if we are looking for one of these */
|
|
|
|
if (u3_0 == NULL && !strcmp(adapter->name, "u3 0")) {
|
|
|
|
u3_0 = adapter;
|
|
|
|
DBG("found U3-0\n");
|
|
|
|
if (k2 || !rackmac)
|
|
|
|
if (create_control_loops())
|
|
|
|
u3_0 = NULL;
|
|
|
|
} else if (u3_1 == NULL && !strcmp(adapter->name, "u3 1")) {
|
|
|
|
u3_1 = adapter;
|
|
|
|
DBG("found U3-1, attaching FCU\n");
|
|
|
|
if (attach_fcu())
|
|
|
|
u3_1 = NULL;
|
|
|
|
} else if (k2 == NULL && !strcmp(adapter->name, "mac-io 0")) {
|
|
|
|
k2 = adapter;
|
|
|
|
DBG("Found K2\n");
|
|
|
|
if (u3_0 && rackmac)
|
|
|
|
if (create_control_loops())
|
|
|
|
k2 = NULL;
|
|
|
|
}
|
|
|
|
/* We got all we need, start control loops */
|
|
|
|
if (u3_0 != NULL && u3_1 != NULL && (k2 || !rackmac)) {
|
|
|
|
DBG("everything up, starting control loops\n");
|
|
|
|
state = state_attached;
|
|
|
|
start_control_loops();
|
|
|
|
}
|
|
|
|
up(&driver_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Called on every adapter when the driver or the i2c controller
|
|
|
|
* is going away.
|
|
|
|
*/
|
|
|
|
static int therm_pm72_detach(struct i2c_adapter *adapter)
|
|
|
|
{
|
|
|
|
down(&driver_lock);
|
|
|
|
|
|
|
|
if (state != state_detached)
|
|
|
|
state = state_detaching;
|
|
|
|
|
|
|
|
/* Stop control loops if any */
|
|
|
|
DBG("stopping control loops\n");
|
|
|
|
up(&driver_lock);
|
|
|
|
stop_control_loops();
|
|
|
|
down(&driver_lock);
|
|
|
|
|
|
|
|
if (u3_0 != NULL && !strcmp(adapter->name, "u3 0")) {
|
|
|
|
DBG("lost U3-0, disposing control loops\n");
|
|
|
|
dispose_control_loops();
|
|
|
|
u3_0 = NULL;
|
|
|
|
}
|
|
|
|
|
|
|
|
if (u3_1 != NULL && !strcmp(adapter->name, "u3 1")) {
|
|
|
|
DBG("lost U3-1, detaching FCU\n");
|
|
|
|
detach_fcu();
|
|
|
|
u3_1 = NULL;
|
|
|
|
}
|
|
|
|
if (u3_0 == NULL && u3_1 == NULL)
|
|
|
|
state = state_detached;
|
|
|
|
|
|
|
|
up(&driver_lock);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int fan_check_loc_match(const char *loc, int fan)
|
|
|
|
{
|
|
|
|
char tmp[64];
|
|
|
|
char *c, *e;
|
|
|
|
|
|
|
|
strlcpy(tmp, fcu_fans[fan].loc, 64);
|
|
|
|
|
|
|
|
c = tmp;
|
|
|
|
for (;;) {
|
|
|
|
e = strchr(c, ',');
|
|
|
|
if (e)
|
|
|
|
*e = 0;
|
|
|
|
if (strcmp(loc, c) == 0)
|
|
|
|
return 1;
|
|
|
|
if (e == NULL)
|
|
|
|
break;
|
|
|
|
c = e + 1;
|
|
|
|
}
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void fcu_lookup_fans(struct device_node *fcu_node)
|
|
|
|
{
|
|
|
|
struct device_node *np = NULL;
|
|
|
|
int i;
|
|
|
|
|
|
|
|
/* The table is filled by default with values that are suitable
|
|
|
|
* for the old machines without device-tree informations. We scan
|
|
|
|
* the device-tree and override those values with whatever is
|
|
|
|
* there
|
|
|
|
*/
|
|
|
|
|
|
|
|
DBG("Looking up FCU controls in device-tree...\n");
|
|
|
|
|
|
|
|
while ((np = of_get_next_child(fcu_node, np)) != NULL) {
|
|
|
|
int type = -1;
|
|
|
|
char *loc;
|
|
|
|
u32 *reg;
|
|
|
|
|
|
|
|
DBG(" control: %s, type: %s\n", np->name, np->type);
|
|
|
|
|
|
|
|
/* Detect control type */
|
|
|
|
if (!strcmp(np->type, "fan-rpm-control") ||
|
|
|
|
!strcmp(np->type, "fan-rpm"))
|
|
|
|
type = FCU_FAN_RPM;
|
|
|
|
if (!strcmp(np->type, "fan-pwm-control") ||
|
|
|
|
!strcmp(np->type, "fan-pwm"))
|
|
|
|
type = FCU_FAN_PWM;
|
|
|
|
/* Only care about fans for now */
|
|
|
|
if (type == -1)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
/* Lookup for a matching location */
|
|
|
|
loc = (char *)get_property(np, "location", NULL);
|
|
|
|
reg = (u32 *)get_property(np, "reg", NULL);
|
|
|
|
if (loc == NULL || reg == NULL)
|
|
|
|
continue;
|
|
|
|
DBG(" matching location: %s, reg: 0x%08x\n", loc, *reg);
|
|
|
|
|
|
|
|
for (i = 0; i < FCU_FAN_COUNT; i++) {
|
|
|
|
int fan_id;
|
|
|
|
|
|
|
|
if (!fan_check_loc_match(loc, i))
|
|
|
|
continue;
|
|
|
|
DBG(" location match, index: %d\n", i);
|
|
|
|
fcu_fans[i].id = FCU_FAN_ABSENT_ID;
|
|
|
|
if (type != fcu_fans[i].type) {
|
|
|
|
printk(KERN_WARNING "therm_pm72: Fan type mismatch "
|
|
|
|
"in device-tree for %s\n", np->full_name);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
if (type == FCU_FAN_RPM)
|
|
|
|
fan_id = ((*reg) - 0x10) / 2;
|
|
|
|
else
|
|
|
|
fan_id = ((*reg) - 0x30) / 2;
|
|
|
|
if (fan_id > 7) {
|
|
|
|
printk(KERN_WARNING "therm_pm72: Can't parse "
|
|
|
|
"fan ID in device-tree for %s\n", np->full_name);
|
|
|
|
break;
|
|
|
|
}
|
|
|
|
DBG(" fan id -> %d, type -> %d\n", fan_id, type);
|
|
|
|
fcu_fans[i].id = fan_id;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
/* Now dump the array */
|
|
|
|
printk(KERN_INFO "Detected fan controls:\n");
|
|
|
|
for (i = 0; i < FCU_FAN_COUNT; i++) {
|
|
|
|
if (fcu_fans[i].id == FCU_FAN_ABSENT_ID)
|
|
|
|
continue;
|
|
|
|
printk(KERN_INFO " %d: %s fan, id %d, location: %s\n", i,
|
|
|
|
fcu_fans[i].type == FCU_FAN_RPM ? "RPM" : "PWM",
|
|
|
|
fcu_fans[i].id, fcu_fans[i].loc);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2005-07-06 21:44:41 +02:00
|
|
|
static int fcu_of_probe(struct of_device* dev, const struct of_device_id *match)
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
int rc;
|
|
|
|
|
|
|
|
state = state_detached;
|
|
|
|
|
|
|
|
/* Lookup the fans in the device tree */
|
|
|
|
fcu_lookup_fans(dev->node);
|
|
|
|
|
|
|
|
/* Add the driver */
|
|
|
|
rc = i2c_add_driver(&therm_pm72_driver);
|
|
|
|
if (rc < 0)
|
|
|
|
return rc;
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static int fcu_of_remove(struct of_device* dev)
|
|
|
|
{
|
|
|
|
i2c_del_driver(&therm_pm72_driver);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
2005-07-06 21:44:41 +02:00
|
|
|
static struct of_device_id fcu_match[] =
|
2005-04-17 00:20:36 +02:00
|
|
|
{
|
|
|
|
{
|
|
|
|
.type = "fcu",
|
|
|
|
},
|
|
|
|
{},
|
|
|
|
};
|
|
|
|
|
|
|
|
static struct of_platform_driver fcu_of_platform_driver =
|
|
|
|
{
|
|
|
|
.name = "temperature",
|
2005-07-06 21:44:41 +02:00
|
|
|
.match_table = fcu_match,
|
2005-04-17 00:20:36 +02:00
|
|
|
.probe = fcu_of_probe,
|
|
|
|
.remove = fcu_of_remove
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
* Check machine type, attach to i2c controller
|
|
|
|
*/
|
|
|
|
static int __init therm_pm72_init(void)
|
|
|
|
{
|
|
|
|
struct device_node *np;
|
|
|
|
|
|
|
|
rackmac = machine_is_compatible("RackMac3,1");
|
|
|
|
|
|
|
|
if (!machine_is_compatible("PowerMac7,2") &&
|
|
|
|
!machine_is_compatible("PowerMac7,3") &&
|
|
|
|
!rackmac)
|
|
|
|
return -ENODEV;
|
|
|
|
|
|
|
|
printk(KERN_INFO "PowerMac G5 Thermal control driver %s\n", VERSION);
|
|
|
|
|
|
|
|
np = of_find_node_by_type(NULL, "fcu");
|
|
|
|
if (np == NULL) {
|
|
|
|
/* Some machines have strangely broken device-tree */
|
|
|
|
np = of_find_node_by_path("/u3@0,f8000000/i2c@f8001000/fan@15e");
|
|
|
|
if (np == NULL) {
|
|
|
|
printk(KERN_ERR "Can't find FCU in device-tree !\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
}
|
2005-09-23 06:44:06 +02:00
|
|
|
of_dev = of_platform_device_create(np, "temperature", NULL);
|
2005-04-17 00:20:36 +02:00
|
|
|
if (of_dev == NULL) {
|
|
|
|
printk(KERN_ERR "Can't register FCU platform device !\n");
|
|
|
|
return -ENODEV;
|
|
|
|
}
|
|
|
|
|
|
|
|
of_register_driver(&fcu_of_platform_driver);
|
|
|
|
|
|
|
|
return 0;
|
|
|
|
}
|
|
|
|
|
|
|
|
static void __exit therm_pm72_exit(void)
|
|
|
|
{
|
|
|
|
of_unregister_driver(&fcu_of_platform_driver);
|
|
|
|
|
|
|
|
if (of_dev)
|
|
|
|
of_device_unregister(of_dev);
|
|
|
|
}
|
|
|
|
|
|
|
|
module_init(therm_pm72_init);
|
|
|
|
module_exit(therm_pm72_exit);
|
|
|
|
|
|
|
|
MODULE_AUTHOR("Benjamin Herrenschmidt <benh@kernel.crashing.org>");
|
|
|
|
MODULE_DESCRIPTION("Driver for Apple's PowerMac G5 thermal control");
|
|
|
|
MODULE_LICENSE("GPL");
|
|
|
|
|