^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) // SPDX-License-Identifier: GPL-2.0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) /* bbc_envctrl.c: UltraSPARC-III environment control driver.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * Copyright (C) 2001, 2008 David S. Miller (davem@davemloft.net)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) #include <linux/kmod.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) #include <linux/reboot.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) #include <linux/of.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/slab.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/of_device.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <asm/oplib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include "bbc_i2c.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include "max1617.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #undef ENVCTRL_TRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) /* WARNING: Making changes to this driver is very dangerous.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * If you misprogram the sensor chips they can
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * cut the power on you instantly.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) /* Two temperature sensors exist in the SunBLADE-1000 enclosure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) * Both are implemented using max1617 i2c devices. Each max1617
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) * monitors 2 temperatures, one for one of the cpu dies and the other
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) * for the ambient temperature.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) * The max1617 is capable of being programmed with power-off
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) * temperature values, one low limit and one high limit. These
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) * can be controlled independently for the cpu or ambient temperature.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) * If a limit is violated, the power is simply shut off. The frequency
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) * with which the max1617 does temperature sampling can be controlled
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) * as well.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) * Three fans exist inside the machine, all three are controlled with
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) * an i2c digital to analog converter. There is a fan directed at the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) * two processor slots, another for the rest of the enclosure, and the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) * third is for the power supply. The first two fans may be speed
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) * controlled by changing the voltage fed to them. The third fan may
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) * only be completely off or on. The third fan is meant to only be
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) * disabled/enabled when entering/exiting the lowest power-saving
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) * mode of the machine.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) * An environmental control kernel thread periodically monitors all
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) * temperature sensors. Based upon the samples it will adjust the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) * fan speeds to try and keep the system within a certain temperature
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) * range (the goal being to make the fans as quiet as possible without
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) * allowing the system to get too hot).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) * If the temperature begins to rise/fall outside of the acceptable
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) * operating range, a periodic warning will be sent to the kernel log.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) * The fans will be put on full blast to attempt to deal with this
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) * situation. After exceeding the acceptable operating range by a
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) * certain threshold, the kernel thread will shut down the system.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) * Here, the thread is attempting to shut the machine down cleanly
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) * before the hardware based power-off event is triggered.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) /* These settings are in Celsius. We use these defaults only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) * if we cannot interrogate the cpu-fru SEEPROM.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) struct temp_limits {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) s8 high_pwroff, high_shutdown, high_warn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67) s8 low_warn, low_shutdown, low_pwroff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70) static struct temp_limits cpu_temp_limits[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) { 100, 85, 80, 5, -5, -10 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) { 100, 85, 80, 5, -5, -10 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) static struct temp_limits amb_temp_limits[2] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) { 65, 55, 40, 5, -5, -10 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) { 65, 55, 40, 5, -5, -10 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) static LIST_HEAD(all_temps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) static LIST_HEAD(all_fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) #define CPU_FAN_REG 0xf0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) #define SYS_FAN_REG 0xf2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) #define PSUPPLY_FAN_REG 0xf4
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) #define FAN_SPEED_MIN 0x0c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) #define FAN_SPEED_MAX 0x3f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) #define PSUPPLY_FAN_ON 0x1f
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91) #define PSUPPLY_FAN_OFF 0x00
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) static void set_fan_speeds(struct bbc_fan_control *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) /* Put temperatures into range so we don't mis-program
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) * the hardware.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) if (fp->cpu_fan_speed < FAN_SPEED_MIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) fp->cpu_fan_speed = FAN_SPEED_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) if (fp->cpu_fan_speed > FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) fp->cpu_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) if (fp->system_fan_speed < FAN_SPEED_MIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) fp->system_fan_speed = FAN_SPEED_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) if (fp->system_fan_speed > FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) fp->system_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) #ifdef ENVCTRL_TRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) printk("fan%d: Changed fan speed to cpu(%02x) sys(%02x)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) fp->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) fp->cpu_fan_speed, fp->system_fan_speed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) bbc_i2c_writeb(fp->client, fp->cpu_fan_speed, CPU_FAN_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) bbc_i2c_writeb(fp->client, fp->system_fan_speed, SYS_FAN_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) bbc_i2c_writeb(fp->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) (fp->psupply_fan_on ?
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) PSUPPLY_FAN_ON : PSUPPLY_FAN_OFF),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) PSUPPLY_FAN_REG);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) static void get_current_temps(struct bbc_cpu_temperature *tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) tp->prev_amb_temp = tp->curr_amb_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) bbc_i2c_readb(tp->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) (unsigned char *) &tp->curr_amb_temp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) MAX1617_AMB_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) tp->prev_cpu_temp = tp->curr_cpu_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) bbc_i2c_readb(tp->client,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) (unsigned char *) &tp->curr_cpu_temp,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) MAX1617_CPU_TEMP);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) #ifdef ENVCTRL_TRACE
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) printk("temp%d: cpu(%d C) amb(%d C)\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) tp->index,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) (int) tp->curr_cpu_temp, (int) tp->curr_amb_temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static void do_envctrl_shutdown(struct bbc_cpu_temperature *tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) static int shutting_down = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) char *type = "???";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) s8 val = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) if (shutting_down != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_shutdown ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) tp->curr_amb_temp < amb_temp_limits[tp->index].low_shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) type = "ambient";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) val = tp->curr_amb_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) } else if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_shutdown ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) type = "CPU";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) val = tp->curr_cpu_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) printk(KERN_CRIT "temp%d: Outside of safe %s "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) "operating temperature, %d C.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) tp->index, type, val);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) printk(KERN_CRIT "kenvctrld: Shutting down the system now.\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) shutting_down = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) orderly_poweroff(true);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) #define WARN_INTERVAL (30 * HZ)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) static void analyze_ambient_temp(struct bbc_cpu_temperature *tp, unsigned long *last_warn, int tick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) if (time_after(jiffies, (*last_warn + WARN_INTERVAL))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) if (tp->curr_amb_temp >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) amb_temp_limits[tp->index].high_warn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) printk(KERN_WARNING "temp%d: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) "Above safe ambient operating temperature, %d C.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) tp->index, (int) tp->curr_amb_temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) } else if (tp->curr_amb_temp <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) amb_temp_limits[tp->index].low_warn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) printk(KERN_WARNING "temp%d: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) "Below safe ambient operating temperature, %d C.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) tp->index, (int) tp->curr_amb_temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) *last_warn = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) } else if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_warn ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) tp->curr_amb_temp < amb_temp_limits[tp->index].low_warn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) /* Now check the shutdown limits. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) if (tp->curr_amb_temp >= amb_temp_limits[tp->index].high_shutdown ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) tp->curr_amb_temp < amb_temp_limits[tp->index].low_shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) do_envctrl_shutdown(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) ret = 1;
^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) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) tp->fan_todo[FAN_AMBIENT] = FAN_FULLBLAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) } else if ((tick & (8 - 1)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) s8 amb_goal_hi = amb_temp_limits[tp->index].high_warn - 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) s8 amb_goal_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) amb_goal_lo = amb_goal_hi - 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) /* We do not try to avoid 'too cold' events. Basically we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) * only try to deal with over-heating and fan noise reduction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) if (tp->avg_amb_temp < amb_goal_hi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (tp->avg_amb_temp >= amb_goal_lo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) tp->fan_todo[FAN_AMBIENT] = FAN_SLOWER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) tp->fan_todo[FAN_AMBIENT] = FAN_FASTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) static void analyze_cpu_temp(struct bbc_cpu_temperature *tp, unsigned long *last_warn, int tick)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) if (time_after(jiffies, (*last_warn + WARN_INTERVAL))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) if (tp->curr_cpu_temp >=
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) cpu_temp_limits[tp->index].high_warn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) printk(KERN_WARNING "temp%d: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) "Above safe CPU operating temperature, %d C.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) tp->index, (int) tp->curr_cpu_temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) } else if (tp->curr_cpu_temp <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) cpu_temp_limits[tp->index].low_warn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) printk(KERN_WARNING "temp%d: "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) "Below safe CPU operating temperature, %d C.\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) tp->index, (int) tp->curr_cpu_temp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) if (ret)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) *last_warn = jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) } else if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_warn ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_warn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) /* Now check the shutdown limits. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) if (tp->curr_cpu_temp >= cpu_temp_limits[tp->index].high_shutdown ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) tp->curr_cpu_temp < cpu_temp_limits[tp->index].low_shutdown) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) do_envctrl_shutdown(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) tp->fan_todo[FAN_CPU] = FAN_FULLBLAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) } else if ((tick & (8 - 1)) == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) s8 cpu_goal_hi = cpu_temp_limits[tp->index].high_warn - 10;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) s8 cpu_goal_lo;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) cpu_goal_lo = cpu_goal_hi - 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) /* We do not try to avoid 'too cold' events. Basically we
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * only try to deal with over-heating and fan noise reduction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) if (tp->avg_cpu_temp < cpu_goal_hi) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) if (tp->avg_cpu_temp >= cpu_goal_lo)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) tp->fan_todo[FAN_CPU] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) tp->fan_todo[FAN_CPU] = FAN_SLOWER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) tp->fan_todo[FAN_CPU] = FAN_FASTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) tp->fan_todo[FAN_CPU] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) static void analyze_temps(struct bbc_cpu_temperature *tp, unsigned long *last_warn)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) tp->avg_amb_temp = (s8)((int)((int)tp->avg_amb_temp + (int)tp->curr_amb_temp) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) tp->avg_cpu_temp = (s8)((int)((int)tp->avg_cpu_temp + (int)tp->curr_cpu_temp) / 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) analyze_ambient_temp(tp, last_warn, tp->sample_tick);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) analyze_cpu_temp(tp, last_warn, tp->sample_tick);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) tp->sample_tick++;
^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) static enum fan_action prioritize_fan_action(int which_fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) struct bbc_cpu_temperature *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) enum fan_action decision = FAN_STATE_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) /* Basically, prioritize what the temperature sensors
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) * recommend we do, and perform that action on all the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) * fans.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) list_for_each_entry(tp, &all_temps, glob_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) if (tp->fan_todo[which_fan] == FAN_FULLBLAST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) decision = FAN_FULLBLAST;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (tp->fan_todo[which_fan] == FAN_SAME &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) decision != FAN_FASTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) decision = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) else if (tp->fan_todo[which_fan] == FAN_FASTER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) decision = FAN_FASTER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) else if (decision != FAN_FASTER &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) decision != FAN_SAME &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) tp->fan_todo[which_fan] == FAN_SLOWER)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) decision = FAN_SLOWER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) if (decision == FAN_STATE_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) decision = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) return decision;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) static int maybe_new_ambient_fan_speed(struct bbc_fan_control *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) enum fan_action decision = prioritize_fan_action(FAN_AMBIENT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) if (decision == FAN_SAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (decision == FAN_FULLBLAST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (fp->system_fan_speed >= FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) fp->system_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) if (decision == FAN_FASTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) if (fp->system_fan_speed >= FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) fp->system_fan_speed += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) int orig_speed = fp->system_fan_speed;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) if (orig_speed <= FAN_SPEED_MIN ||
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) orig_speed <= (fp->cpu_fan_speed - 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) fp->system_fan_speed -= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) static int maybe_new_cpu_fan_speed(struct bbc_fan_control *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) enum fan_action decision = prioritize_fan_action(FAN_CPU);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if (decision == FAN_SAME)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if (decision == FAN_FULLBLAST) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) if (fp->cpu_fan_speed >= FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) fp->cpu_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) if (decision == FAN_FASTER) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) if (fp->cpu_fan_speed >= FAN_SPEED_MAX)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) fp->cpu_fan_speed += 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) if (fp->system_fan_speed <
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) (fp->cpu_fan_speed - 3))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) fp->system_fan_speed =
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) fp->cpu_fan_speed - 3;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if (fp->cpu_fan_speed <= FAN_SPEED_MIN)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) fp->cpu_fan_speed -= 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) static void maybe_new_fan_speeds(struct bbc_fan_control *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) int new;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) new = maybe_new_ambient_fan_speed(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) new |= maybe_new_cpu_fan_speed(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) if (new)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) set_fan_speeds(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) static void fans_full_blast(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) struct bbc_fan_control *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) /* Since we will not be monitoring things anymore, put
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) * the fans on full blast.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) list_for_each_entry(fp, &all_fans, glob_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) fp->cpu_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) fp->system_fan_speed = FAN_SPEED_MAX;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) fp->psupply_fan_on = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) set_fan_speeds(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) #define POLL_INTERVAL (5 * 1000)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) static unsigned long last_warning_jiffies;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) static struct task_struct *kenvctrld_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) static int kenvctrld(void *__unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) printk(KERN_INFO "bbc_envctrl: kenvctrld starting...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) last_warning_jiffies = jiffies - WARN_INTERVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) struct bbc_cpu_temperature *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) struct bbc_fan_control *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) msleep_interruptible(POLL_INTERVAL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (kthread_should_stop())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) list_for_each_entry(tp, &all_temps, glob_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) get_current_temps(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) analyze_temps(tp, &last_warning_jiffies);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) list_for_each_entry(fp, &all_fans, glob_list)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) maybe_new_fan_speeds(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) printk(KERN_INFO "bbc_envctrl: kenvctrld exiting...\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) fans_full_blast();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) static void attach_one_temp(struct bbc_i2c_bus *bp, struct platform_device *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) int temp_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) struct bbc_cpu_temperature *tp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) tp = kzalloc(sizeof(*tp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) if (!tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) INIT_LIST_HEAD(&tp->bp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) INIT_LIST_HEAD(&tp->glob_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) tp->client = bbc_i2c_attach(bp, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) if (!tp->client) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) kfree(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) tp->index = temp_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) list_add(&tp->glob_list, &all_temps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) list_add(&tp->bp_list, &bp->temps);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* Tell it to convert once every 5 seconds, clear all cfg
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) * bits.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) bbc_i2c_writeb(tp->client, 0x00, MAX1617_WR_CFG_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) bbc_i2c_writeb(tp->client, 0x02, MAX1617_WR_CVRATE_BYTE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) /* Program the hard temperature limits into the chip. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) bbc_i2c_writeb(tp->client, amb_temp_limits[tp->index].high_pwroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) MAX1617_WR_AMB_HIGHLIM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) bbc_i2c_writeb(tp->client, amb_temp_limits[tp->index].low_pwroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) MAX1617_WR_AMB_LOWLIM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) bbc_i2c_writeb(tp->client, cpu_temp_limits[tp->index].high_pwroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) MAX1617_WR_CPU_HIGHLIM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) bbc_i2c_writeb(tp->client, cpu_temp_limits[tp->index].low_pwroff,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) MAX1617_WR_CPU_LOWLIM);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) get_current_temps(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) tp->prev_cpu_temp = tp->avg_cpu_temp = tp->curr_cpu_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) tp->prev_amb_temp = tp->avg_amb_temp = tp->curr_amb_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) tp->fan_todo[FAN_AMBIENT] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) tp->fan_todo[FAN_CPU] = FAN_SAME;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) static void attach_one_fan(struct bbc_i2c_bus *bp, struct platform_device *op,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) int fan_idx)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) struct bbc_fan_control *fp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) fp = kzalloc(sizeof(*fp), GFP_KERNEL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) if (!fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) INIT_LIST_HEAD(&fp->bp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) INIT_LIST_HEAD(&fp->glob_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) fp->client = bbc_i2c_attach(bp, op);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) if (!fp->client) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) kfree(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) fp->index = fan_idx;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) list_add(&fp->glob_list, &all_fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) list_add(&fp->bp_list, &bp->fans);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) /* The i2c device controlling the fans is write-only.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) * So the only way to keep track of the current power
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * level fed to the fans is via software. Choose half
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) * power for cpu/system and 'on' fo the powersupply fan
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) * and set it now.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) fp->psupply_fan_on = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524) fp->cpu_fan_speed = (FAN_SPEED_MAX - FAN_SPEED_MIN) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) fp->cpu_fan_speed += FAN_SPEED_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) fp->system_fan_speed = (FAN_SPEED_MAX - FAN_SPEED_MIN) / 2;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) fp->system_fan_speed += FAN_SPEED_MIN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) set_fan_speeds(fp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) static void destroy_one_temp(struct bbc_cpu_temperature *tp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) bbc_i2c_detach(tp->client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) kfree(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) static void destroy_all_temps(struct bbc_i2c_bus *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) struct bbc_cpu_temperature *tp, *tpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) list_for_each_entry_safe(tp, tpos, &bp->temps, bp_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) list_del(&tp->bp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) list_del(&tp->glob_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) destroy_one_temp(tp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) static void destroy_one_fan(struct bbc_fan_control *fp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) bbc_i2c_detach(fp->client);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) kfree(fp);
^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) static void destroy_all_fans(struct bbc_i2c_bus *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) struct bbc_fan_control *fp, *fpos;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) list_for_each_entry_safe(fp, fpos, &bp->fans, bp_list) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) list_del(&fp->bp_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) list_del(&fp->glob_list);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) destroy_one_fan(fp);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) int bbc_envctrl_init(struct bbc_i2c_bus *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 567) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 568) struct platform_device *op;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 569) int temp_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 570) int fan_index = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 571) int devidx = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 572)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 573) while ((op = bbc_i2c_getdev(bp, devidx++)) != NULL) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 574) if (of_node_name_eq(op->dev.of_node, "temperature"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 575) attach_one_temp(bp, op, temp_index++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 576) if (of_node_name_eq(op->dev.of_node, "fan-control"))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 577) attach_one_fan(bp, op, fan_index++);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 578) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 579) if (temp_index != 0 && fan_index != 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 580) kenvctrld_task = kthread_run(kenvctrld, NULL, "kenvctrld");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 581) if (IS_ERR(kenvctrld_task)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 582) int err = PTR_ERR(kenvctrld_task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 583)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 584) kenvctrld_task = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 585) destroy_all_temps(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 586) destroy_all_fans(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 587) return err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 588) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 589) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 590)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 591) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 592) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 593)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 594) void bbc_envctrl_cleanup(struct bbc_i2c_bus *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 595) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 596) if (kenvctrld_task)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 597) kthread_stop(kenvctrld_task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 598)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 599) destroy_all_temps(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 600) destroy_all_fans(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 601) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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