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1043 lines
25 KiB
1043 lines
25 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Windfarm PowerMac thermal control. iMac G5 iSight |
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* |
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* (c) Copyright 2007 Étienne Bersac <[email protected]> |
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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. <[email protected]> |
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* |
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* PowerMac12,1 |
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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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* 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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* 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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* # 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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* 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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* 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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* 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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|
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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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|
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#include "windfarm.h" |
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#include "windfarm_pid.h" |
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|
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#define VERSION "0.3" |
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|
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static int pm121_mach_model; /* machine model id */ |
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|
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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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|
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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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|
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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; |
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static bool pm121_started; |
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|
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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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|
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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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|
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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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|
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#define PM121_NUM_CONFIGS 2 |
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|
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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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|
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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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|
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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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|
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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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|
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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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/* |
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* ****** System Fans Control Loop ****** |
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* |
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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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|
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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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|
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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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|
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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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static 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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|
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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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* ***** 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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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", |
|
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 */ |
|
static void pm121_create_sys_fans(int loop_id) |
|
{ |
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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; |
|
int i; |
|
|
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/* First, locate the params for this model */ |
|
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]); |
|
break; |
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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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control = controls[param->control_id]; |
|
|
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/* Alloc & initialize state */ |
|
pm121_sys_state[loop_id] = kmalloc(sizeof(struct pm121_sys_state), |
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GFP_KERNEL); |
|
if (pm121_sys_state[loop_id] == NULL) { |
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printk(KERN_WARNING "pm121: Memory allocation error\n"); |
|
goto fail; |
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} |
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pm121_sys_state[loop_id]->ticks = 1; |
|
|
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/* Fill PID params */ |
|
pid_param.gd = PM121_SYS_GD; |
|
pid_param.gp = param->gp; |
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pid_param.gr = PM121_SYS_GR; |
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pid_param.interval = PM121_SYS_INTERVAL; |
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pid_param.history_len = PM121_SYS_HISTORY_SIZE; |
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pid_param.itarget = param->itarget; |
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if(control) |
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{ |
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pid_param.min = control->ops->get_min(control); |
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pid_param.max = control->ops->get_max(control); |
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} else { |
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/* |
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* This is probably not the right!? |
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* Perhaps goto fail if control == NULL above? |
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*/ |
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pid_param.min = 0; |
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pid_param.max = 0; |
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} |
|
|
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wf_pid_init(&pm121_sys_state[loop_id]->pid, &pid_param); |
|
|
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pr_debug("pm121: %s Fan control loop initialized.\n" |
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" itarged=%d.%03d, min=%d RPM, max=%d RPM\n", |
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loop_names[loop_id], FIX32TOPRINT(pid_param.itarget), |
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pid_param.min, pid_param.max); |
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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", |
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loop_names[loop_id], control ? control->name : "uninitialized value"); |
|
|
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if (control) |
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wf_control_set_max(control); |
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} |
|
|
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static void pm121_sys_fans_tick(int loop_id) |
|
{ |
|
struct pm121_sys_param *param; |
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struct pm121_sys_state *st; |
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struct wf_sensor *sensor; |
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struct wf_control *control; |
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s32 temp, new_setpoint; |
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int rc; |
|
|
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param = &(pm121_sys_all_params[loop_id][pm121_mach_model-2]); |
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st = pm121_sys_state[loop_id]; |
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sensor = *(param->sensor); |
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control = controls[param->control_id]; |
|
|
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if (--st->ticks != 0) { |
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if (pm121_readjust) |
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goto readjust; |
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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); |
|
|
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/* 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(" ttarget=%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 = true; |
|
} |
|
|
|
/* 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 <[email protected]>"); |
|
MODULE_DESCRIPTION("Thermal control logic for iMac G5 (iSight)"); |
|
MODULE_LICENSE("GPL"); |
|
|
|
|