^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Windfarm PowerMac thermal control.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Control loops for machines with SMU and PPC970MP processors.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * Copyright (C) 2005 Paul Mackerras, IBM Corp. <paulus@samba.org>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * Copyright (C) 2006 Benjamin Herrenschmidt, IBM Corp.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/platform_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <asm/smu.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include "windfarm.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include "windfarm_pid.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) #define VERSION "0.2"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) #define DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) #undef LOTSA_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) #ifdef DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) #define DBG(args...) printk(args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) #define DBG(args...) do { } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #ifdef LOTSA_DEBUG
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #define DBG_LOTS(args...) printk(args)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #define DBG_LOTS(args...) do { } while(0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) /* define this to force CPU overtemp to 60 degree, useful for testing
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * the overtemp code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #undef HACKED_OVERTEMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) /* We currently only handle 2 chips, 4 cores... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #define NR_CHIPS 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #define NR_CORES 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) #define NR_CPU_FANS 3 * NR_CHIPS
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) /* Controls and sensors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct wf_sensor *sens_cpu_temp[NR_CORES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) static struct wf_sensor *sens_cpu_power[NR_CORES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) static struct wf_sensor *hd_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) static struct wf_sensor *slots_power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) static struct wf_sensor *u4_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) static struct wf_control *cpu_fans[NR_CPU_FANS];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) static char *cpu_fan_names[NR_CPU_FANS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) "cpu-rear-fan-0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) "cpu-rear-fan-1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) "cpu-front-fan-0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) "cpu-front-fan-1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) "cpu-pump-0",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) "cpu-pump-1",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) static struct wf_control *cpufreq_clamp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) /* Second pump isn't required (and isn't actually present) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) #define CPU_FANS_REQD (NR_CPU_FANS - 2)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) #define FIRST_PUMP 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) #define LAST_PUMP 5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) /* We keep a temperature history for average calculation of 180s */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) #define CPU_TEMP_HIST_SIZE 180
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) /* Scale factor for fan speed, *100 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static int cpu_fan_scale[NR_CPU_FANS] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) 100,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) 97, /* inlet fans run at 97% of exhaust fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) 97,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) 100, /* updated later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) 100, /* updated later */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) static struct wf_control *backside_fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) static struct wf_control *slots_fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) static struct wf_control *drive_bay_fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) /* PID loop state */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) static struct wf_cpu_pid_state cpu_pid[NR_CORES];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) static u32 cpu_thist[CPU_TEMP_HIST_SIZE];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) static int cpu_thist_pt;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static s64 cpu_thist_total;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static s32 cpu_all_tmax = 100 << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) static int cpu_last_target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) static struct wf_pid_state backside_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) static int backside_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) static struct wf_pid_state slots_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static bool slots_started;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) static struct wf_pid_state drive_bay_pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static int drive_bay_tick;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) static int nr_cores;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) static int have_all_controls;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static int have_all_sensors;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) static bool started;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) static int failure_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) #define FAILURE_SENSOR 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) #define FAILURE_FAN 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #define FAILURE_PERM 4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) #define FAILURE_LOW_OVERTEMP 8
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) #define FAILURE_HIGH_OVERTEMP 16
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) /* Overtemp values */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) #define LOW_OVER_AVERAGE 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) #define LOW_OVER_IMMEDIATE (10 << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) #define LOW_OVER_CLEAR ((-10) << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) #define HIGH_OVER_IMMEDIATE (14 << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) #define HIGH_OVER_AVERAGE (10 << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) #define HIGH_OVER_IMMEDIATE (14 << 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) /* Implementation... */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static int create_cpu_loop(int cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) int chip = cpu / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int core = cpu & 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) struct smu_sdbp_header *hdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) struct smu_sdbp_cpupiddata *piddata;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) struct wf_cpu_pid_param pid;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) struct wf_control *main_fan = cpu_fans[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) s32 tmax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) int fmin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) /* Get FVT params to get Tmax; if not found, assume default */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) hdr = smu_sat_get_sdb_partition(chip, 0xC4 + core, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (hdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) struct smu_sdbp_fvt *fvt = (struct smu_sdbp_fvt *)&hdr[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) tmax = fvt->maxtemp << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) tmax = 95 << 16; /* default to 95 degrees C */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) /* We keep a global tmax for overtemp calculations */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (tmax < cpu_all_tmax)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) cpu_all_tmax = tmax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) kfree(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) /* Get PID params from the appropriate SAT */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) hdr = smu_sat_get_sdb_partition(chip, 0xC8 + core, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (hdr == NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) printk(KERN_WARNING"windfarm: can't get CPU PID fan config\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) piddata = (struct smu_sdbp_cpupiddata *)&hdr[1];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) * Darwin has a minimum fan speed of 1000 rpm for the 4-way and
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) * 515 for the 2-way. That appears to be overkill, so for now,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) * impose a minimum of 750 or 515.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) fmin = (nr_cores > 2) ? 750 : 515;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) /* Initialize PID loop */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) pid.interval = 1; /* seconds */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) pid.history_len = piddata->history_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) pid.gd = piddata->gd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) pid.gp = piddata->gp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) pid.gr = piddata->gr / piddata->history_len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) pid.pmaxadj = (piddata->max_power << 16) - (piddata->power_adj << 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) pid.ttarget = tmax - (piddata->target_temp_delta << 16);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) pid.tmax = tmax;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) pid.min = main_fan->ops->get_min(main_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) pid.max = main_fan->ops->get_max(main_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) if (pid.min < fmin)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) pid.min = fmin;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) wf_cpu_pid_init(&cpu_pid[cpu], &pid);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) kfree(hdr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) static void cpu_max_all_fans(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) /* We max all CPU fans in case of a sensor error. We also do the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) * cpufreq clamping now, even if it's supposedly done later by the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * generic code anyway, we do it earlier here to react faster
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if (cpufreq_clamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) wf_control_set_max(cpufreq_clamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) for (i = 0; i < NR_CPU_FANS; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) if (cpu_fans[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) wf_control_set_max(cpu_fans[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) static int cpu_check_overtemp(s32 temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) int new_state = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) s32 t_avg, t_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) /* First check for immediate overtemps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) if (temp >= (cpu_all_tmax + LOW_OVER_IMMEDIATE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) new_state |= FAILURE_LOW_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) if ((failure_state & FAILURE_LOW_OVERTEMP) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) printk(KERN_ERR "windfarm: Overtemp due to immediate CPU"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) " temperature !\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (temp >= (cpu_all_tmax + HIGH_OVER_IMMEDIATE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) new_state |= FAILURE_HIGH_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) printk(KERN_ERR "windfarm: Critical overtemp due to"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) " immediate CPU temperature !\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) /* We calculate a history of max temperatures and use that for the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) * overtemp management
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) t_old = cpu_thist[cpu_thist_pt];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) cpu_thist[cpu_thist_pt] = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) cpu_thist_pt = (cpu_thist_pt + 1) % CPU_TEMP_HIST_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) cpu_thist_total -= t_old;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) cpu_thist_total += temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) t_avg = cpu_thist_total / CPU_TEMP_HIST_SIZE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) DBG_LOTS("t_avg = %d.%03d (out: %d.%03d, in: %d.%03d)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) FIX32TOPRINT(t_avg), FIX32TOPRINT(t_old), FIX32TOPRINT(temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) /* Now check for average overtemps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) if (t_avg >= (cpu_all_tmax + LOW_OVER_AVERAGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) new_state |= FAILURE_LOW_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) if ((failure_state & FAILURE_LOW_OVERTEMP) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) printk(KERN_ERR "windfarm: Overtemp due to average CPU"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) " temperature !\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if (t_avg >= (cpu_all_tmax + HIGH_OVER_AVERAGE)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) new_state |= FAILURE_HIGH_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) if ((failure_state & FAILURE_HIGH_OVERTEMP) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) printk(KERN_ERR "windfarm: Critical overtemp due to"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) " average CPU temperature !\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) /* Now handle overtemp conditions. We don't currently use the windfarm
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) * overtemp handling core as it's not fully suited to the needs of those
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) * new machine. This will be fixed later.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) if (new_state) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) /* High overtemp -> immediate shutdown */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) if (new_state & FAILURE_HIGH_OVERTEMP)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) machine_power_off();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) if ((failure_state & new_state) != new_state)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) cpu_max_all_fans();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) failure_state |= new_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) } else if ((failure_state & FAILURE_LOW_OVERTEMP) &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) (temp < (cpu_all_tmax + LOW_OVER_CLEAR))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) printk(KERN_ERR "windfarm: Overtemp condition cleared !\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) failure_state &= ~FAILURE_LOW_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) return failure_state & (FAILURE_LOW_OVERTEMP | FAILURE_HIGH_OVERTEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) static void cpu_fans_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) int err, cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) s32 greatest_delta = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) s32 temp, power, t_max = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) int i, t, target = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) struct wf_sensor *sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) struct wf_control *ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) struct wf_cpu_pid_state *sp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) DBG_LOTS(KERN_DEBUG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) for (cpu = 0; cpu < nr_cores; ++cpu) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) /* Get CPU core temperature */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) sr = sens_cpu_temp[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) err = sr->ops->get_value(sr, &temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) DBG("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) printk(KERN_WARNING "windfarm: CPU %d temperature "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) "sensor error %d\n", cpu, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) failure_state |= FAILURE_SENSOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) cpu_max_all_fans();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) /* Keep track of highest temp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) t_max = max(t_max, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) /* Get CPU power */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) sr = sens_cpu_power[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) err = sr->ops->get_value(sr, &power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) DBG("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) printk(KERN_WARNING "windfarm: CPU %d power "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) "sensor error %d\n", cpu, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) failure_state |= FAILURE_SENSOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) cpu_max_all_fans();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) /* Run PID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) sp = &cpu_pid[cpu];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) t = wf_cpu_pid_run(sp, power, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) if (cpu == 0 || sp->last_delta > greatest_delta) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) greatest_delta = sp->last_delta;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) target = t;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) DBG_LOTS("[%d] P=%d.%.3d T=%d.%.3d ",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) cpu, FIX32TOPRINT(power), FIX32TOPRINT(temp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) DBG_LOTS("fans = %d, t_max = %d.%03d\n", target, FIX32TOPRINT(t_max));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /* Darwin limits decrease to 20 per iteration */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) if (target < (cpu_last_target - 20))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) target = cpu_last_target - 20;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) cpu_last_target = target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) for (cpu = 0; cpu < nr_cores; ++cpu)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) cpu_pid[cpu].target = target;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) /* Handle possible overtemps */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (cpu_check_overtemp(t_max))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) /* Set fans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) for (i = 0; i < NR_CPU_FANS; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ct = cpu_fans[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (ct == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) err = ct->ops->set_value(ct, target * cpu_fan_scale[i] / 100);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) printk(KERN_WARNING "windfarm: fan %s reports "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) "error %d\n", ct->name, err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) failure_state |= FAILURE_FAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) /* Backside/U4 fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) static struct wf_pid_param backside_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) .interval = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) .history_len = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) .gd = 48 << 20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) .gp = 5 << 20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) .gr = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) .itarget = 64 << 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) .additive = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) static void backside_fan_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) s32 temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) int speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) if (!backside_fan || !u4_temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (!backside_tick) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) /* first time; initialize things */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) printk(KERN_INFO "windfarm: Backside control loop started.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) backside_param.min = backside_fan->ops->get_min(backside_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) backside_param.max = backside_fan->ops->get_max(backside_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) wf_pid_init(&backside_pid, &backside_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) backside_tick = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) if (--backside_tick > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) backside_tick = backside_pid.param.interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) err = u4_temp->ops->get_value(u4_temp, &temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) printk(KERN_WARNING "windfarm: U4 temp sensor error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) failure_state |= FAILURE_SENSOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) wf_control_set_max(backside_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) speed = wf_pid_run(&backside_pid, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) DBG_LOTS("backside PID temp=%d.%.3d speed=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) FIX32TOPRINT(temp), speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) err = backside_fan->ops->set_value(backside_fan, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) printk(KERN_WARNING "windfarm: backside fan error %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) failure_state |= FAILURE_FAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) /* Drive bay fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) static struct wf_pid_param drive_bay_prm = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) .interval = 5,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) .history_len = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) .gd = 30 << 20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) .gp = 5 << 20,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) .gr = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) .itarget = 40 << 16,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) .additive = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) static void drive_bay_fan_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) s32 temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) int speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (!drive_bay_fan || !hd_temp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) if (!drive_bay_tick) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) /* first time; initialize things */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) printk(KERN_INFO "windfarm: Drive bay control loop started.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) drive_bay_prm.min = drive_bay_fan->ops->get_min(drive_bay_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) drive_bay_prm.max = drive_bay_fan->ops->get_max(drive_bay_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) wf_pid_init(&drive_bay_pid, &drive_bay_prm);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) drive_bay_tick = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) if (--drive_bay_tick > 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) drive_bay_tick = drive_bay_pid.param.interval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) err = hd_temp->ops->get_value(hd_temp, &temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) printk(KERN_WARNING "windfarm: drive bay temp sensor "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) "error %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) failure_state |= FAILURE_SENSOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) wf_control_set_max(drive_bay_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) speed = wf_pid_run(&drive_bay_pid, temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) DBG_LOTS("drive_bay PID temp=%d.%.3d speed=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) FIX32TOPRINT(temp), speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) err = drive_bay_fan->ops->set_value(drive_bay_fan, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) printk(KERN_WARNING "windfarm: drive bay fan error %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) failure_state |= FAILURE_FAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) /* PCI slots area fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) /* This makes the fan speed proportional to the power consumed */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static struct wf_pid_param slots_param = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) .interval = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) .history_len = 2,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) .gd = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) .gp = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) .gr = 0x1277952,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) .itarget = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) .min = 1560,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) .max = 3510,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) static void slots_fan_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) s32 power;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) int speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) if (!slots_fan || !slots_power)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (!slots_started) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) /* first time; initialize things */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) printk(KERN_INFO "windfarm: Slots control loop started.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) wf_pid_init(&slots_pid, &slots_param);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) slots_started = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) err = slots_power->ops->get_value(slots_power, &power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) printk(KERN_WARNING "windfarm: slots power sensor error %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) failure_state |= FAILURE_SENSOR;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) wf_control_set_max(slots_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) speed = wf_pid_run(&slots_pid, power);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) DBG_LOTS("slots PID power=%d.%.3d speed=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) FIX32TOPRINT(power), speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) err = slots_fan->ops->set_value(slots_fan, speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) if (err) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) printk(KERN_WARNING "windfarm: slots fan error %d\n", err);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) failure_state |= FAILURE_FAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) static void set_fail_state(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) if (cpufreq_clamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) wf_control_set_max(cpufreq_clamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) for (i = 0; i < NR_CPU_FANS; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) if (cpu_fans[i])
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) wf_control_set_max(cpu_fans[i]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (backside_fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) wf_control_set_max(backside_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) if (slots_fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) wf_control_set_max(slots_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) if (drive_bay_fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) wf_control_set_max(drive_bay_fan);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) static void pm112_tick(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) int i, last_failure;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) if (!started) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) started = true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) printk(KERN_INFO "windfarm: CPUs control loops started.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) for (i = 0; i < nr_cores; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (create_cpu_loop(i) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) failure_state = FAILURE_PERM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) set_fail_state();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) DBG_LOTS("cpu_all_tmax=%d.%03d\n", FIX32TOPRINT(cpu_all_tmax));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) #ifdef HACKED_OVERTEMP
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) cpu_all_tmax = 60 << 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) /* Permanent failure, bail out */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) if (failure_state & FAILURE_PERM)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) /* Clear all failure bits except low overtemp which will be eventually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * cleared by the control loop itself
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) last_failure = failure_state;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) failure_state &= FAILURE_LOW_OVERTEMP;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) cpu_fans_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) backside_fan_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) slots_fan_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) drive_bay_fan_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) DBG_LOTS("last_failure: 0x%x, failure_state: %x\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) last_failure, failure_state);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) /* Check for failures. Any failure causes cpufreq clamping */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (failure_state && last_failure == 0 && cpufreq_clamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) wf_control_set_max(cpufreq_clamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) if (failure_state == 0 && last_failure && cpufreq_clamp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) wf_control_set_min(cpufreq_clamp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) /* That's it for now, we might want to deal with other failures
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) * differently in the future though
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) static void pm112_new_control(struct wf_control *ct)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) int i, max_exhaust;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) if (cpufreq_clamp == NULL && !strcmp(ct->name, "cpufreq-clamp")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) if (wf_get_control(ct) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) cpufreq_clamp = ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) for (i = 0; i < NR_CPU_FANS; ++i) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) if (!strcmp(ct->name, cpu_fan_names[i])) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) if (cpu_fans[i] == NULL && wf_get_control(ct) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) cpu_fans[i] = ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572) if (i >= NR_CPU_FANS) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) /* not a CPU fan, try the others */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (!strcmp(ct->name, "backside-fan")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) if (backside_fan == NULL && wf_get_control(ct) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) backside_fan = ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) } else if (!strcmp(ct->name, "slots-fan")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) if (slots_fan == NULL && wf_get_control(ct) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) slots_fan = ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) } else if (!strcmp(ct->name, "drive-bay-fan")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (drive_bay_fan == NULL && wf_get_control(ct) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) drive_bay_fan = ct;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) for (i = 0; i < CPU_FANS_REQD; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) if (cpu_fans[i] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) /* work out pump scaling factors */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) max_exhaust = cpu_fans[0]->ops->get_max(cpu_fans[0]);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593) for (i = FIRST_PUMP; i <= LAST_PUMP; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) if ((ct = cpu_fans[i]) != NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) cpu_fan_scale[i] =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) ct->ops->get_max(ct) * 100 / max_exhaust;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598) have_all_controls = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) static void pm112_new_sensor(struct wf_sensor *sr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 602) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 603) unsigned int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 604)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 605) if (!strncmp(sr->name, "cpu-temp-", 9)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 606) i = sr->name[9] - '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 607) if (sr->name[10] == 0 && i < NR_CORES &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 608) sens_cpu_temp[i] == NULL && wf_get_sensor(sr) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 609) sens_cpu_temp[i] = sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 610)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 611) } else if (!strncmp(sr->name, "cpu-power-", 10)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 612) i = sr->name[10] - '0';
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 613) if (sr->name[11] == 0 && i < NR_CORES &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 614) sens_cpu_power[i] == NULL && wf_get_sensor(sr) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 615) sens_cpu_power[i] = sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 616) } else if (!strcmp(sr->name, "hd-temp")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 617) if (hd_temp == NULL && wf_get_sensor(sr) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 618) hd_temp = sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 619) } else if (!strcmp(sr->name, "slots-power")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 620) if (slots_power == NULL && wf_get_sensor(sr) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 621) slots_power = sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 622) } else if (!strcmp(sr->name, "backside-temp")) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 623) if (u4_temp == NULL && wf_get_sensor(sr) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 624) u4_temp = sr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 625) } else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 626) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 627)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 628) /* check if we have all the sensors we need */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 629) for (i = 0; i < nr_cores; ++i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 630) if (sens_cpu_temp[i] == NULL || sens_cpu_power[i] == NULL)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 631) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 632)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 633) have_all_sensors = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 634) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 635)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 636) static int pm112_wf_notify(struct notifier_block *self,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 637) unsigned long event, void *data)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 638) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 639) switch (event) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 640) case WF_EVENT_NEW_SENSOR:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 641) pm112_new_sensor(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 642) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 643) case WF_EVENT_NEW_CONTROL:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 644) pm112_new_control(data);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 645) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 646) case WF_EVENT_TICK:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 647) if (have_all_controls && have_all_sensors)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 648) pm112_tick();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 649) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 650) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 651) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 652)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 653) static struct notifier_block pm112_events = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 654) .notifier_call = pm112_wf_notify,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 655) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 656)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 657) static int wf_pm112_probe(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 658) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 659) wf_register_client(&pm112_events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 660) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 661) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 662)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 663) static int wf_pm112_remove(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 664) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 665) wf_unregister_client(&pm112_events);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 666) /* should release all sensors and controls */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 667) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 668) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 669)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 670) static struct platform_driver wf_pm112_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 671) .probe = wf_pm112_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 672) .remove = wf_pm112_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 673) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 674) .name = "windfarm",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 675) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 676) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 677)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 678) static int __init wf_pm112_init(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 679) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 680) struct device_node *cpu;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 681)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 682) if (!of_machine_is_compatible("PowerMac11,2"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 683) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 684)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 685) /* Count the number of CPU cores */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 686) nr_cores = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 687) for_each_node_by_type(cpu, "cpu")
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 688) ++nr_cores;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 689)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 690) printk(KERN_INFO "windfarm: initializing for dual-core desktop G5\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 691)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 692) #ifdef MODULE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 693) request_module("windfarm_smu_controls");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 694) request_module("windfarm_smu_sensors");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 695) request_module("windfarm_smu_sat");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 696) request_module("windfarm_lm75_sensor");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 697) request_module("windfarm_max6690_sensor");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 698) request_module("windfarm_cpufreq_clamp");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 699)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 700) #endif /* MODULE */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 701)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 702) platform_driver_register(&wf_pm112_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 703) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 704) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 705)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 706) static void __exit wf_pm112_exit(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 707) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 708) platform_driver_unregister(&wf_pm112_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 709) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 710)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 711) module_init(wf_pm112_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 712) module_exit(wf_pm112_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 713)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 714) MODULE_AUTHOR("Paul Mackerras <paulus@samba.org>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 715) MODULE_DESCRIPTION("Thermal control for PowerMac11,2");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 716) MODULE_LICENSE("GPL");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 717) MODULE_ALIAS("platform:windfarm");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags