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![Rickard Strandqvist](/assets/img/avatar_default.png)
There is otherwise a risk of a possible null pointer dereference. Was largely found by using a static code analysis program called cppcheck. Signed-off-by: Rickard Strandqvist <rickard_strandqvist@spectrumdigital.se> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
1053 lines
25 KiB
C
1053 lines
25 KiB
C
/*
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* Windfarm PowerMac thermal control. iMac G5 iSight
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*
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* (c) Copyright 2007 Étienne Bersac <bersace@gmail.com>
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*
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* Bits & pieces from windfarm_pm81.c by (c) Copyright 2005 Benjamin
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* Herrenschmidt, IBM Corp. <benh@kernel.crashing.org>
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*
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* Released under the term of the GNU GPL v2.
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*
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*
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*
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* PowerMac12,1
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* ============
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*
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*
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* The algorithm used is the PID control algorithm, used the same way
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* the published Darwin code does, using the same values that are
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* present in the Darwin 8.10 snapshot property lists (note however
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* that none of the code has been re-used, it's a complete
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* re-implementation
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*
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* There is two models using PowerMac12,1. Model 2 is iMac G5 iSight
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* 17" while Model 3 is iMac G5 20". They do have both the same
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* controls with a tiny difference. The control-ids of hard-drive-fan
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* and cpu-fan is swapped.
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*
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*
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* Target Correction :
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*
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* controls have a target correction calculated as :
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*
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* new_min = ((((average_power * slope) >> 16) + offset) >> 16) + min_value
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* new_value = max(new_value, max(new_min, 0))
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*
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* OD Fan control correction.
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*
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* # model_id: 2
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* offset : -19563152
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* slope : 1956315
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*
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* # model_id: 3
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* offset : -15650652
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* slope : 1565065
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*
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* HD Fan control correction.
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*
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* # model_id: 2
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* offset : -15650652
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* slope : 1565065
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*
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* # model_id: 3
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* offset : -19563152
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* slope : 1956315
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*
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* CPU Fan control correction.
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*
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* # model_id: 2
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* offset : -25431900
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* slope : 2543190
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*
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* # model_id: 3
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* offset : -15650652
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* slope : 1565065
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*
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*
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* Target rubber-banding :
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*
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* Some controls have a target correction which depends on another
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* control value. The correction is computed in the following way :
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*
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* new_min = ref_value * slope + offset
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*
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* ref_value is the value of the reference control. If new_min is
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* greater than 0, then we correct the target value using :
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*
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* new_target = max (new_target, new_min >> 16)
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*
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*
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* # model_id : 2
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* control : cpu-fan
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* ref : optical-drive-fan
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* offset : -15650652
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* slope : 1565065
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*
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* # model_id : 3
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* control : optical-drive-fan
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* ref : hard-drive-fan
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* offset : -32768000
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* slope : 65536
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*
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*
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* In order to have the moste efficient correction with those
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* dependencies, we must trigger HD loop before OD loop before CPU
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* loop.
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*
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*
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* The various control loops found in Darwin config file are:
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*
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* HD Fan control loop.
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*
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* # model_id: 2
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* control : hard-drive-fan
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* sensor : hard-drive-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x002D70A3
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x370000
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* Interval = 5s
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*
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* # model_id: 3
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* control : hard-drive-fan
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* sensor : hard-drive-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x002170A3
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x370000
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* Interval = 5s
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*
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* OD Fan control loop.
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*
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* # model_id: 2
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* control : optical-drive-fan
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* sensor : optical-drive-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x001FAE14
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x320000
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* Interval = 5s
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*
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* # model_id: 3
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* control : optical-drive-fan
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* sensor : optical-drive-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x001FAE14
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x320000
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* Interval = 5s
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*
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* GPU Fan control loop.
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*
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* # model_id: 2
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* control : hard-drive-fan
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* sensor : gpu-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x002A6666
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x5A0000
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* Interval = 5s
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*
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* # model_id: 3
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* control : cpu-fan
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* sensor : gpu-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x0010CCCC
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x500000
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* Interval = 5s
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*
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* KODIAK (aka northbridge) Fan control loop.
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*
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* # model_id: 2
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* control : optical-drive-fan
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* sensor : north-bridge-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x003BD70A
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x550000
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* Interval = 5s
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*
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* # model_id: 3
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* control : hard-drive-fan
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* sensor : north-bridge-temp
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* PID params : G_d = 0x00000000
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* G_p = 0x0030F5C2
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* G_r = 0x00019999
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* History = 2 entries
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* Input target = 0x550000
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* Interval = 5s
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*
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* CPU Fan control loop.
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*
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* control : cpu-fan
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* sensors : cpu-temp, cpu-power
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* PID params : from SDB partition
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*
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*
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* CPU Slew control loop.
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*
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* control : cpufreq-clamp
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* sensor : cpu-temp
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*
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*/
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#undef DEBUG
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#include <linux/types.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/slab.h>
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#include <linux/init.h>
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#include <linux/spinlock.h>
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#include <linux/wait.h>
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#include <linux/kmod.h>
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#include <linux/device.h>
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#include <linux/platform_device.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/sections.h>
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#include <asm/smu.h>
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#include "windfarm.h"
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#include "windfarm_pid.h"
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#define VERSION "0.3"
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static int pm121_mach_model; /* machine model id */
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/* Controls & sensors */
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static struct wf_sensor *sensor_cpu_power;
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static struct wf_sensor *sensor_cpu_temp;
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static struct wf_sensor *sensor_cpu_voltage;
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static struct wf_sensor *sensor_cpu_current;
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static struct wf_sensor *sensor_gpu_temp;
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static struct wf_sensor *sensor_north_bridge_temp;
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static struct wf_sensor *sensor_hard_drive_temp;
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static struct wf_sensor *sensor_optical_drive_temp;
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static struct wf_sensor *sensor_incoming_air_temp; /* unused ! */
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enum {
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FAN_CPU,
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FAN_HD,
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FAN_OD,
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CPUFREQ,
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N_CONTROLS
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};
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static struct wf_control *controls[N_CONTROLS] = {};
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/* Set to kick the control loop into life */
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static int pm121_all_controls_ok, pm121_all_sensors_ok, pm121_started;
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enum {
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FAILURE_FAN = 1 << 0,
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FAILURE_SENSOR = 1 << 1,
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FAILURE_OVERTEMP = 1 << 2
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};
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/* All sys loops. Note the HD before the OD loop in order to have it
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run before. */
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enum {
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LOOP_GPU, /* control = hd or cpu, but luckily,
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it doesn't matter */
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LOOP_HD, /* control = hd */
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LOOP_KODIAK, /* control = hd or od */
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LOOP_OD, /* control = od */
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N_LOOPS
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};
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static const char *loop_names[N_LOOPS] = {
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"GPU",
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"HD",
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"KODIAK",
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"OD",
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};
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#define PM121_NUM_CONFIGS 2
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static unsigned int pm121_failure_state;
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static int pm121_readjust, pm121_skipping;
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static bool pm121_overtemp;
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static s32 average_power;
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struct pm121_correction {
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int offset;
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int slope;
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};
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static struct pm121_correction corrections[N_CONTROLS][PM121_NUM_CONFIGS] = {
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/* FAN_OD */
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{
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/* MODEL 2 */
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{ .offset = -19563152,
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.slope = 1956315
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},
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/* MODEL 3 */
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{ .offset = -15650652,
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.slope = 1565065
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},
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},
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/* FAN_HD */
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{
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/* MODEL 2 */
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{ .offset = -15650652,
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.slope = 1565065
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},
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/* MODEL 3 */
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{ .offset = -19563152,
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.slope = 1956315
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},
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},
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/* FAN_CPU */
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{
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/* MODEL 2 */
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{ .offset = -25431900,
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.slope = 2543190
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},
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/* MODEL 3 */
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{ .offset = -15650652,
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.slope = 1565065
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},
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},
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/* CPUFREQ has no correction (and is not implemented at all) */
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};
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struct pm121_connection {
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unsigned int control_id;
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unsigned int ref_id;
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struct pm121_correction correction;
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};
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static struct pm121_connection pm121_connections[] = {
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/* MODEL 2 */
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{ .control_id = FAN_CPU,
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.ref_id = FAN_OD,
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{ .offset = -32768000,
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.slope = 65536
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}
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},
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/* MODEL 3 */
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{ .control_id = FAN_OD,
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.ref_id = FAN_HD,
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{ .offset = -32768000,
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.slope = 65536
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}
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},
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};
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/* pointer to the current model connection */
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static struct pm121_connection *pm121_connection;
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/*
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* ****** System Fans Control Loop ******
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*
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*/
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/* Since each loop handles only one control and we want to avoid
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* writing virtual control, we store the control correction with the
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* loop params. Some data are not set, there are common to all loop
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* and thus, hardcoded.
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*/
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struct pm121_sys_param {
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/* purely informative since we use mach_model-2 as index */
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int model_id;
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struct wf_sensor **sensor; /* use sensor_id instead ? */
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s32 gp, itarget;
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unsigned int control_id;
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};
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static struct pm121_sys_param
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pm121_sys_all_params[N_LOOPS][PM121_NUM_CONFIGS] = {
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/* GPU Fan control loop */
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{
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{ .model_id = 2,
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.sensor = &sensor_gpu_temp,
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.gp = 0x002A6666,
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.itarget = 0x5A0000,
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.control_id = FAN_HD,
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},
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{ .model_id = 3,
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.sensor = &sensor_gpu_temp,
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.gp = 0x0010CCCC,
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.itarget = 0x500000,
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.control_id = FAN_CPU,
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},
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},
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/* HD Fan control loop */
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{
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{ .model_id = 2,
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.sensor = &sensor_hard_drive_temp,
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.gp = 0x002D70A3,
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.itarget = 0x370000,
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.control_id = FAN_HD,
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},
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{ .model_id = 3,
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.sensor = &sensor_hard_drive_temp,
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.gp = 0x002170A3,
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.itarget = 0x370000,
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.control_id = FAN_HD,
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},
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},
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/* KODIAK Fan control loop */
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{
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{ .model_id = 2,
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.sensor = &sensor_north_bridge_temp,
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.gp = 0x003BD70A,
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.itarget = 0x550000,
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.control_id = FAN_OD,
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},
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{ .model_id = 3,
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.sensor = &sensor_north_bridge_temp,
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.gp = 0x0030F5C2,
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.itarget = 0x550000,
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.control_id = FAN_HD,
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},
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},
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/* OD Fan control loop */
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{
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{ .model_id = 2,
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.sensor = &sensor_optical_drive_temp,
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.gp = 0x001FAE14,
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.itarget = 0x320000,
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.control_id = FAN_OD,
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},
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{ .model_id = 3,
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.sensor = &sensor_optical_drive_temp,
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.gp = 0x001FAE14,
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.itarget = 0x320000,
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.control_id = FAN_OD,
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},
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},
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};
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/* the hardcoded values */
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#define PM121_SYS_GD 0x00000000
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#define PM121_SYS_GR 0x00019999
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#define PM121_SYS_HISTORY_SIZE 2
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#define PM121_SYS_INTERVAL 5
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/* State data used by the system fans control loop
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*/
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struct pm121_sys_state {
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int ticks;
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s32 setpoint;
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struct wf_pid_state pid;
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};
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struct pm121_sys_state *pm121_sys_state[N_LOOPS] = {};
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/*
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* ****** CPU Fans Control Loop ******
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*
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*/
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#define PM121_CPU_INTERVAL 1
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/* State data used by the cpu fans control loop
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*/
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struct pm121_cpu_state {
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int ticks;
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s32 setpoint;
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struct wf_cpu_pid_state pid;
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};
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static struct pm121_cpu_state *pm121_cpu_state;
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|
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|
|
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/*
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* ***** Implementation *****
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*
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*/
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/* correction the value using the output-low-bound correction algo */
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static s32 pm121_correct(s32 new_setpoint,
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unsigned int control_id,
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s32 min)
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{
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s32 new_min;
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struct pm121_correction *correction;
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correction = &corrections[control_id][pm121_mach_model - 2];
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new_min = (average_power * correction->slope) >> 16;
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new_min += correction->offset;
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new_min = (new_min >> 16) + min;
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return max3(new_setpoint, new_min, 0);
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}
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|
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static s32 pm121_connect(unsigned int control_id, s32 setpoint)
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{
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s32 new_min, value, new_setpoint;
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if (pm121_connection->control_id == control_id) {
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controls[control_id]->ops->get_value(controls[control_id],
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&value);
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new_min = value * pm121_connection->correction.slope;
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new_min += pm121_connection->correction.offset;
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if (new_min > 0) {
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new_setpoint = max(setpoint, (new_min >> 16));
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if (new_setpoint != setpoint) {
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pr_debug("pm121: %s depending on %s, "
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"corrected from %d to %d RPM\n",
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controls[control_id]->name,
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controls[pm121_connection->ref_id]->name,
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(int) setpoint, (int) new_setpoint);
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}
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} else
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new_setpoint = setpoint;
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}
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/* no connection */
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else
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new_setpoint = setpoint;
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return new_setpoint;
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}
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|
|
/* FAN LOOPS */
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static void pm121_create_sys_fans(int loop_id)
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{
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struct pm121_sys_param *param = NULL;
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struct wf_pid_param pid_param;
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struct wf_control *control = NULL;
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int i;
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/* First, locate the params for this model */
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for (i = 0; i < PM121_NUM_CONFIGS; i++) {
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if (pm121_sys_all_params[loop_id][i].model_id == pm121_mach_model) {
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param = &(pm121_sys_all_params[loop_id][i]);
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break;
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}
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}
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/* No params found, put fans to max */
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if (param == NULL) {
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printk(KERN_WARNING "pm121: %s fan config not found "
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" for this machine model\n",
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loop_names[loop_id]);
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goto fail;
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}
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control = controls[param->control_id];
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|
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/* Alloc & initialize state */
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pm121_sys_state[loop_id] = kmalloc(sizeof(struct pm121_sys_state),
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GFP_KERNEL);
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if (pm121_sys_state[loop_id] == NULL) {
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|
printk(KERN_WARNING "pm121: Memory allocation error\n");
|
|
goto fail;
|
|
}
|
|
pm121_sys_state[loop_id]->ticks = 1;
|
|
|
|
/* Fill PID params */
|
|
pid_param.gd = PM121_SYS_GD;
|
|
pid_param.gp = param->gp;
|
|
pid_param.gr = PM121_SYS_GR;
|
|
pid_param.interval = PM121_SYS_INTERVAL;
|
|
pid_param.history_len = PM121_SYS_HISTORY_SIZE;
|
|
pid_param.itarget = param->itarget;
|
|
if(control)
|
|
{
|
|
pid_param.min = control->ops->get_min(control);
|
|
pid_param.max = control->ops->get_max(control);
|
|
} else {
|
|
/*
|
|
* This is probably not the right!?
|
|
* Perhaps goto fail if control == NULL above?
|
|
*/
|
|
pid_param.min = 0;
|
|
pid_param.max = 0;
|
|
}
|
|
|
|
wf_pid_init(&pm121_sys_state[loop_id]->pid, &pid_param);
|
|
|
|
pr_debug("pm121: %s Fan control loop initialized.\n"
|
|
" itarged=%d.%03d, min=%d RPM, max=%d RPM\n",
|
|
loop_names[loop_id], FIX32TOPRINT(pid_param.itarget),
|
|
pid_param.min, pid_param.max);
|
|
return;
|
|
|
|
fail:
|
|
/* note that this is not optimal since another loop may still
|
|
control the same control */
|
|
printk(KERN_WARNING "pm121: failed to set up %s loop "
|
|
"setting \"%s\" to max speed.\n",
|
|
loop_names[loop_id], control ? control->name : "uninitialized value");
|
|
|
|
if (control)
|
|
wf_control_set_max(control);
|
|
}
|
|
|
|
static void pm121_sys_fans_tick(int loop_id)
|
|
{
|
|
struct pm121_sys_param *param;
|
|
struct pm121_sys_state *st;
|
|
struct wf_sensor *sensor;
|
|
struct wf_control *control;
|
|
s32 temp, new_setpoint;
|
|
int rc;
|
|
|
|
param = &(pm121_sys_all_params[loop_id][pm121_mach_model-2]);
|
|
st = pm121_sys_state[loop_id];
|
|
sensor = *(param->sensor);
|
|
control = controls[param->control_id];
|
|
|
|
if (--st->ticks != 0) {
|
|
if (pm121_readjust)
|
|
goto readjust;
|
|
return;
|
|
}
|
|
st->ticks = PM121_SYS_INTERVAL;
|
|
|
|
rc = sensor->ops->get_value(sensor, &temp);
|
|
if (rc) {
|
|
printk(KERN_WARNING "windfarm: %s sensor error %d\n",
|
|
sensor->name, rc);
|
|
pm121_failure_state |= FAILURE_SENSOR;
|
|
return;
|
|
}
|
|
|
|
pr_debug("pm121: %s Fan tick ! %s: %d.%03d\n",
|
|
loop_names[loop_id], sensor->name,
|
|
FIX32TOPRINT(temp));
|
|
|
|
new_setpoint = wf_pid_run(&st->pid, temp);
|
|
|
|
/* correction */
|
|
new_setpoint = pm121_correct(new_setpoint,
|
|
param->control_id,
|
|
st->pid.param.min);
|
|
/* linked corretion */
|
|
new_setpoint = pm121_connect(param->control_id, new_setpoint);
|
|
|
|
if (new_setpoint == st->setpoint)
|
|
return;
|
|
st->setpoint = new_setpoint;
|
|
pr_debug("pm121: %s corrected setpoint: %d RPM\n",
|
|
control->name, (int)new_setpoint);
|
|
readjust:
|
|
if (control && pm121_failure_state == 0) {
|
|
rc = control->ops->set_value(control, st->setpoint);
|
|
if (rc) {
|
|
printk(KERN_WARNING "windfarm: %s fan error %d\n",
|
|
control->name, rc);
|
|
pm121_failure_state |= FAILURE_FAN;
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* CPU LOOP */
|
|
static void pm121_create_cpu_fans(void)
|
|
{
|
|
struct wf_cpu_pid_param pid_param;
|
|
const struct smu_sdbp_header *hdr;
|
|
struct smu_sdbp_cpupiddata *piddata;
|
|
struct smu_sdbp_fvt *fvt;
|
|
struct wf_control *fan_cpu;
|
|
s32 tmax, tdelta, maxpow, powadj;
|
|
|
|
fan_cpu = controls[FAN_CPU];
|
|
|
|
/* First, locate the PID params in SMU SBD */
|
|
hdr = smu_get_sdb_partition(SMU_SDB_CPUPIDDATA_ID, NULL);
|
|
if (hdr == 0) {
|
|
printk(KERN_WARNING "pm121: CPU PID fan config not found.\n");
|
|
goto fail;
|
|
}
|
|
piddata = (struct smu_sdbp_cpupiddata *)&hdr[1];
|
|
|
|
/* Get the FVT params for operating point 0 (the only supported one
|
|
* for now) in order to get tmax
|
|
*/
|
|
hdr = smu_get_sdb_partition(SMU_SDB_FVT_ID, NULL);
|
|
if (hdr) {
|
|
fvt = (struct smu_sdbp_fvt *)&hdr[1];
|
|
tmax = ((s32)fvt->maxtemp) << 16;
|
|
} else
|
|
tmax = 0x5e0000; /* 94 degree default */
|
|
|
|
/* Alloc & initialize state */
|
|
pm121_cpu_state = kmalloc(sizeof(struct pm121_cpu_state),
|
|
GFP_KERNEL);
|
|
if (pm121_cpu_state == NULL)
|
|
goto fail;
|
|
pm121_cpu_state->ticks = 1;
|
|
|
|
/* Fill PID params */
|
|
pid_param.interval = PM121_CPU_INTERVAL;
|
|
pid_param.history_len = piddata->history_len;
|
|
if (pid_param.history_len > WF_CPU_PID_MAX_HISTORY) {
|
|
printk(KERN_WARNING "pm121: History size overflow on "
|
|
"CPU control loop (%d)\n", piddata->history_len);
|
|
pid_param.history_len = WF_CPU_PID_MAX_HISTORY;
|
|
}
|
|
pid_param.gd = piddata->gd;
|
|
pid_param.gp = piddata->gp;
|
|
pid_param.gr = piddata->gr / pid_param.history_len;
|
|
|
|
tdelta = ((s32)piddata->target_temp_delta) << 16;
|
|
maxpow = ((s32)piddata->max_power) << 16;
|
|
powadj = ((s32)piddata->power_adj) << 16;
|
|
|
|
pid_param.tmax = tmax;
|
|
pid_param.ttarget = tmax - tdelta;
|
|
pid_param.pmaxadj = maxpow - powadj;
|
|
|
|
pid_param.min = fan_cpu->ops->get_min(fan_cpu);
|
|
pid_param.max = fan_cpu->ops->get_max(fan_cpu);
|
|
|
|
wf_cpu_pid_init(&pm121_cpu_state->pid, &pid_param);
|
|
|
|
pr_debug("pm121: CPU Fan control initialized.\n");
|
|
pr_debug(" ttarged=%d.%03d, tmax=%d.%03d, min=%d RPM, max=%d RPM,\n",
|
|
FIX32TOPRINT(pid_param.ttarget), FIX32TOPRINT(pid_param.tmax),
|
|
pid_param.min, pid_param.max);
|
|
|
|
return;
|
|
|
|
fail:
|
|
printk(KERN_WARNING "pm121: CPU fan config not found, max fan speed\n");
|
|
|
|
if (controls[CPUFREQ])
|
|
wf_control_set_max(controls[CPUFREQ]);
|
|
if (fan_cpu)
|
|
wf_control_set_max(fan_cpu);
|
|
}
|
|
|
|
|
|
static void pm121_cpu_fans_tick(struct pm121_cpu_state *st)
|
|
{
|
|
s32 new_setpoint, temp, power;
|
|
struct wf_control *fan_cpu = NULL;
|
|
int rc;
|
|
|
|
if (--st->ticks != 0) {
|
|
if (pm121_readjust)
|
|
goto readjust;
|
|
return;
|
|
}
|
|
st->ticks = PM121_CPU_INTERVAL;
|
|
|
|
fan_cpu = controls[FAN_CPU];
|
|
|
|
rc = sensor_cpu_temp->ops->get_value(sensor_cpu_temp, &temp);
|
|
if (rc) {
|
|
printk(KERN_WARNING "pm121: CPU temp sensor error %d\n",
|
|
rc);
|
|
pm121_failure_state |= FAILURE_SENSOR;
|
|
return;
|
|
}
|
|
|
|
rc = sensor_cpu_power->ops->get_value(sensor_cpu_power, &power);
|
|
if (rc) {
|
|
printk(KERN_WARNING "pm121: CPU power sensor error %d\n",
|
|
rc);
|
|
pm121_failure_state |= FAILURE_SENSOR;
|
|
return;
|
|
}
|
|
|
|
pr_debug("pm121: CPU Fans tick ! CPU temp: %d.%03d°C, power: %d.%03d\n",
|
|
FIX32TOPRINT(temp), FIX32TOPRINT(power));
|
|
|
|
if (temp > st->pid.param.tmax)
|
|
pm121_failure_state |= FAILURE_OVERTEMP;
|
|
|
|
new_setpoint = wf_cpu_pid_run(&st->pid, power, temp);
|
|
|
|
/* correction */
|
|
new_setpoint = pm121_correct(new_setpoint,
|
|
FAN_CPU,
|
|
st->pid.param.min);
|
|
|
|
/* connected correction */
|
|
new_setpoint = pm121_connect(FAN_CPU, new_setpoint);
|
|
|
|
if (st->setpoint == new_setpoint)
|
|
return;
|
|
st->setpoint = new_setpoint;
|
|
pr_debug("pm121: CPU corrected setpoint: %d RPM\n", (int)new_setpoint);
|
|
|
|
readjust:
|
|
if (fan_cpu && pm121_failure_state == 0) {
|
|
rc = fan_cpu->ops->set_value(fan_cpu, st->setpoint);
|
|
if (rc) {
|
|
printk(KERN_WARNING "pm121: %s fan error %d\n",
|
|
fan_cpu->name, rc);
|
|
pm121_failure_state |= FAILURE_FAN;
|
|
}
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ****** Common ******
|
|
*
|
|
*/
|
|
|
|
static void pm121_tick(void)
|
|
{
|
|
unsigned int last_failure = pm121_failure_state;
|
|
unsigned int new_failure;
|
|
s32 total_power;
|
|
int i;
|
|
|
|
if (!pm121_started) {
|
|
pr_debug("pm121: creating control loops !\n");
|
|
for (i = 0; i < N_LOOPS; i++)
|
|
pm121_create_sys_fans(i);
|
|
|
|
pm121_create_cpu_fans();
|
|
pm121_started = 1;
|
|
}
|
|
|
|
/* skipping ticks */
|
|
if (pm121_skipping && --pm121_skipping)
|
|
return;
|
|
|
|
/* compute average power */
|
|
total_power = 0;
|
|
for (i = 0; i < pm121_cpu_state->pid.param.history_len; i++)
|
|
total_power += pm121_cpu_state->pid.powers[i];
|
|
|
|
average_power = total_power / pm121_cpu_state->pid.param.history_len;
|
|
|
|
|
|
pm121_failure_state = 0;
|
|
for (i = 0 ; i < N_LOOPS; i++) {
|
|
if (pm121_sys_state[i])
|
|
pm121_sys_fans_tick(i);
|
|
}
|
|
|
|
if (pm121_cpu_state)
|
|
pm121_cpu_fans_tick(pm121_cpu_state);
|
|
|
|
pm121_readjust = 0;
|
|
new_failure = pm121_failure_state & ~last_failure;
|
|
|
|
/* If entering failure mode, clamp cpufreq and ramp all
|
|
* fans to full speed.
|
|
*/
|
|
if (pm121_failure_state && !last_failure) {
|
|
for (i = 0; i < N_CONTROLS; i++) {
|
|
if (controls[i])
|
|
wf_control_set_max(controls[i]);
|
|
}
|
|
}
|
|
|
|
/* If leaving failure mode, unclamp cpufreq and readjust
|
|
* all fans on next iteration
|
|
*/
|
|
if (!pm121_failure_state && last_failure) {
|
|
if (controls[CPUFREQ])
|
|
wf_control_set_min(controls[CPUFREQ]);
|
|
pm121_readjust = 1;
|
|
}
|
|
|
|
/* Overtemp condition detected, notify and start skipping a couple
|
|
* ticks to let the temperature go down
|
|
*/
|
|
if (new_failure & FAILURE_OVERTEMP) {
|
|
wf_set_overtemp();
|
|
pm121_skipping = 2;
|
|
pm121_overtemp = true;
|
|
}
|
|
|
|
/* We only clear the overtemp condition if overtemp is cleared
|
|
* _and_ no other failure is present. Since a sensor error will
|
|
* clear the overtemp condition (can't measure temperature) at
|
|
* the control loop levels, but we don't want to keep it clear
|
|
* here in this case
|
|
*/
|
|
if (!pm121_failure_state && pm121_overtemp) {
|
|
wf_clear_overtemp();
|
|
pm121_overtemp = false;
|
|
}
|
|
}
|
|
|
|
|
|
static struct wf_control* pm121_register_control(struct wf_control *ct,
|
|
const char *match,
|
|
unsigned int id)
|
|
{
|
|
if (controls[id] == NULL && !strcmp(ct->name, match)) {
|
|
if (wf_get_control(ct) == 0)
|
|
controls[id] = ct;
|
|
}
|
|
return controls[id];
|
|
}
|
|
|
|
static void pm121_new_control(struct wf_control *ct)
|
|
{
|
|
int all = 1;
|
|
|
|
if (pm121_all_controls_ok)
|
|
return;
|
|
|
|
all = pm121_register_control(ct, "optical-drive-fan", FAN_OD) && all;
|
|
all = pm121_register_control(ct, "hard-drive-fan", FAN_HD) && all;
|
|
all = pm121_register_control(ct, "cpu-fan", FAN_CPU) && all;
|
|
all = pm121_register_control(ct, "cpufreq-clamp", CPUFREQ) && all;
|
|
|
|
if (all)
|
|
pm121_all_controls_ok = 1;
|
|
}
|
|
|
|
|
|
|
|
|
|
static struct wf_sensor* pm121_register_sensor(struct wf_sensor *sensor,
|
|
const char *match,
|
|
struct wf_sensor **var)
|
|
{
|
|
if (*var == NULL && !strcmp(sensor->name, match)) {
|
|
if (wf_get_sensor(sensor) == 0)
|
|
*var = sensor;
|
|
}
|
|
return *var;
|
|
}
|
|
|
|
static void pm121_new_sensor(struct wf_sensor *sr)
|
|
{
|
|
int all = 1;
|
|
|
|
if (pm121_all_sensors_ok)
|
|
return;
|
|
|
|
all = pm121_register_sensor(sr, "cpu-temp",
|
|
&sensor_cpu_temp) && all;
|
|
all = pm121_register_sensor(sr, "cpu-current",
|
|
&sensor_cpu_current) && all;
|
|
all = pm121_register_sensor(sr, "cpu-voltage",
|
|
&sensor_cpu_voltage) && all;
|
|
all = pm121_register_sensor(sr, "cpu-power",
|
|
&sensor_cpu_power) && all;
|
|
all = pm121_register_sensor(sr, "hard-drive-temp",
|
|
&sensor_hard_drive_temp) && all;
|
|
all = pm121_register_sensor(sr, "optical-drive-temp",
|
|
&sensor_optical_drive_temp) && all;
|
|
all = pm121_register_sensor(sr, "incoming-air-temp",
|
|
&sensor_incoming_air_temp) && all;
|
|
all = pm121_register_sensor(sr, "north-bridge-temp",
|
|
&sensor_north_bridge_temp) && all;
|
|
all = pm121_register_sensor(sr, "gpu-temp",
|
|
&sensor_gpu_temp) && all;
|
|
|
|
if (all)
|
|
pm121_all_sensors_ok = 1;
|
|
}
|
|
|
|
|
|
|
|
static int pm121_notify(struct notifier_block *self,
|
|
unsigned long event, void *data)
|
|
{
|
|
switch (event) {
|
|
case WF_EVENT_NEW_CONTROL:
|
|
pr_debug("pm121: new control %s detected\n",
|
|
((struct wf_control *)data)->name);
|
|
pm121_new_control(data);
|
|
break;
|
|
case WF_EVENT_NEW_SENSOR:
|
|
pr_debug("pm121: new sensor %s detected\n",
|
|
((struct wf_sensor *)data)->name);
|
|
pm121_new_sensor(data);
|
|
break;
|
|
case WF_EVENT_TICK:
|
|
if (pm121_all_controls_ok && pm121_all_sensors_ok)
|
|
pm121_tick();
|
|
break;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct notifier_block pm121_events = {
|
|
.notifier_call = pm121_notify,
|
|
};
|
|
|
|
static int pm121_init_pm(void)
|
|
{
|
|
const struct smu_sdbp_header *hdr;
|
|
|
|
hdr = smu_get_sdb_partition(SMU_SDB_SENSORTREE_ID, NULL);
|
|
if (hdr != 0) {
|
|
struct smu_sdbp_sensortree *st =
|
|
(struct smu_sdbp_sensortree *)&hdr[1];
|
|
pm121_mach_model = st->model_id;
|
|
}
|
|
|
|
pm121_connection = &pm121_connections[pm121_mach_model - 2];
|
|
|
|
printk(KERN_INFO "pm121: Initializing for iMac G5 iSight model ID %d\n",
|
|
pm121_mach_model);
|
|
|
|
return 0;
|
|
}
|
|
|
|
|
|
static int pm121_probe(struct platform_device *ddev)
|
|
{
|
|
wf_register_client(&pm121_events);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int pm121_remove(struct platform_device *ddev)
|
|
{
|
|
wf_unregister_client(&pm121_events);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver pm121_driver = {
|
|
.probe = pm121_probe,
|
|
.remove = pm121_remove,
|
|
.driver = {
|
|
.name = "windfarm",
|
|
.bus = &platform_bus_type,
|
|
},
|
|
};
|
|
|
|
|
|
static int __init pm121_init(void)
|
|
{
|
|
int rc = -ENODEV;
|
|
|
|
if (of_machine_is_compatible("PowerMac12,1"))
|
|
rc = pm121_init_pm();
|
|
|
|
if (rc == 0) {
|
|
request_module("windfarm_smu_controls");
|
|
request_module("windfarm_smu_sensors");
|
|
request_module("windfarm_smu_sat");
|
|
request_module("windfarm_lm75_sensor");
|
|
request_module("windfarm_max6690_sensor");
|
|
request_module("windfarm_cpufreq_clamp");
|
|
platform_driver_register(&pm121_driver);
|
|
}
|
|
|
|
return rc;
|
|
}
|
|
|
|
static void __exit pm121_exit(void)
|
|
{
|
|
|
|
platform_driver_unregister(&pm121_driver);
|
|
}
|
|
|
|
|
|
module_init(pm121_init);
|
|
module_exit(pm121_exit);
|
|
|
|
MODULE_AUTHOR("Étienne Bersac <bersace@gmail.com>");
|
|
MODULE_DESCRIPTION("Thermal control logic for iMac G5 (iSight)");
|
|
MODULE_LICENSE("GPL");
|
|
|