^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Creation Date: <2003/03/14 20:54:13 samuel>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) * Time-stamp: <2004/03/20 14:20:59 samuel>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * <therm_windtunnel.c>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) * The G4 "windtunnel" has a single fan controlled by an
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * ADM1030 fan controller and a DS1775 thermostat.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) * The fan controller is equipped with a temperature sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) * which measures the case temperature. The DS1775 sensor
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) * measures the CPU temperature. This driver tunes the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) * behavior of the fan. It is based upon empirical observations
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) * of the 'AppleFan' driver under Mac OS X.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) * WARNING: This driver has only been testen on Apple's
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) * 1.25 MHz Dual G4 (March 03). It is tuned for a CPU
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) * temperature around 57 C.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) * Copyright (C) 2003, 2004 Samuel Rydh (samuel@ibrium.se)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) * Loosely based upon 'thermostat.c' written by Benjamin Herrenschmidt
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) * This program is free software; you can redistribute it and/or
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) * modify it under the terms of the GNU General Public License
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26) * as published by the Free Software Foundation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) #include <linux/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31) #include <linux/module.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) #include <linux/errno.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) #include <linux/delay.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) #include <linux/i2c.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) #include <linux/kthread.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39) #include <linux/of_platform.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) #include <asm/prom.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) #include <asm/machdep.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) #include <asm/io.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44) #include <asm/sections.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) #include <asm/macio.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47) #define LOG_TEMP 0 /* continuously log temperature */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) volatile int running;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) struct task_struct *poll_task;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) struct mutex lock;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) struct platform_device *of_dev;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) struct i2c_client *thermostat;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) struct i2c_client *fan;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) int overheat_temp; /* 100% fan at this temp */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) int overheat_hyst;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) int casetemp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63) int fan_level; /* active fan_table setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65) int downind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) int upind;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) int r0, r1, r20, r23, r25; /* saved register */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) } x;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) #define T(x,y) (((x)<<8) | (y)*0x100/10 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) static struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) int fan_down_setting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75) int temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76) int fan_up_setting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) } fan_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) { 11, T(0,0), 11 }, /* min fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79) { 11, T(55,0), 11 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) { 6, T(55,3), 11 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) { 7, T(56,0), 11 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) { 8, T(57,0), 8 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83) { 7, T(58,3), 7 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) { 6, T(58,8), 6 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) { 5, T(59,2), 5 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) { 4, T(59,6), 4 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87) { 3, T(59,9), 3 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) { 2, T(60,1), 2 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) { 1, 0xfffff, 1 } /* on fire */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) print_temp( const char *s, int temp )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) printk("%s%d.%d C", s ? s : "", temp>>8, (temp & 255)*10/256 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) show_cpu_temperature( struct device *dev, struct device_attribute *attr, char *buf )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) return sprintf(buf, "%d.%d\n", x.temp>>8, (x.temp & 255)*10/256 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) static ssize_t
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) show_case_temperature( struct device *dev, struct device_attribute *attr, char *buf )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) return sprintf(buf, "%d.%d\n", x.casetemp>>8, (x.casetemp & 255)*10/256 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) static DEVICE_ATTR(cpu_temperature, S_IRUGO, show_cpu_temperature, NULL );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) static DEVICE_ATTR(case_temperature, S_IRUGO, show_case_temperature, NULL );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) /* controller thread */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) write_reg( struct i2c_client *cl, int reg, int data, int len )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) u8 tmp[3];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) if( len < 1 || len > 2 || data < 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) tmp[0] = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) tmp[1] = (len == 1) ? data : (data >> 8);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) tmp[2] = data;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) len++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if( i2c_master_send(cl, tmp, len) != len )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) return 0;
^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) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) read_reg( struct i2c_client *cl, int reg, int len )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) u8 buf[2];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) if( len != 1 && len != 2 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return -EINVAL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) buf[0] = reg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if( i2c_master_send(cl, buf, 1) != 1 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) if( i2c_master_recv(cl, buf, len) != len )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) return (len == 2)? ((unsigned int)buf[0] << 8) | buf[1] : buf[0];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) tune_fan( int fan_setting )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) int val = (fan_setting << 3) | 7;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) /* write_reg( x.fan, 0x24, val, 1 ); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) write_reg( x.fan, 0x25, val, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) write_reg( x.fan, 0x20, 0, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) print_temp("CPU-temp: ", x.temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) if( x.casetemp )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) print_temp(", Case: ", x.casetemp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) printk(", Fan: %d (tuned %+d)\n", 11-fan_setting, x.fan_level-fan_setting );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) x.fan_level = fan_setting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) poll_temp( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) int temp, i, level, casetemp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) temp = read_reg( x.thermostat, 0, 2 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) /* this actually occurs when the computer is loaded */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) if( temp < 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) casetemp = read_reg(x.fan, 0x0b, 1) << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) casetemp |= (read_reg(x.fan, 0x06, 1) & 0x7) << 5;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) if( LOG_TEMP && x.temp != temp ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) print_temp("CPU-temp: ", temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) print_temp(", Case: ", casetemp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) printk(", Fan: %d\n", 11-x.fan_level );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) x.temp = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) x.casetemp = casetemp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) level = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) for( i=0; (temp & 0xffff) > fan_table[i].temp ; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) if( i < x.downind )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) level = fan_table[i].fan_down_setting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) x.downind = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) for( i=0; (temp & 0xffff) >= fan_table[i+1].temp ; i++ )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) ;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) if( x.upind < i )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) level = fan_table[i].fan_up_setting;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) x.upind = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) if( level >= 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) tune_fan( level );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) setup_hardware( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) int val;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) int err;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) /* save registers (if we unload the module) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) x.r0 = read_reg( x.fan, 0x00, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) x.r1 = read_reg( x.fan, 0x01, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) x.r20 = read_reg( x.fan, 0x20, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) x.r23 = read_reg( x.fan, 0x23, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) x.r25 = read_reg( x.fan, 0x25, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) /* improve measurement resolution (convergence time 1.5s) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) if( (val=read_reg(x.thermostat, 1, 1)) >= 0 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) val |= 0x60;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) if( write_reg( x.thermostat, 1, val, 1 ) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) printk("Failed writing config register\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) /* disable interrupts and TAC input */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) write_reg( x.fan, 0x01, 0x01, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) /* enable filter */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) write_reg( x.fan, 0x23, 0x91, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) /* remote temp. controls fan */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) write_reg( x.fan, 0x00, 0x95, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) /* The thermostat (which besides measureing temperature controls
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * has a THERM output which puts the fan on 100%) is usually
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) * set to kick in at 80 C (chip default). We reduce this a bit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237) * to be on the safe side (OSX doesn't)...
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) if( x.overheat_temp == (80 << 8) ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) x.overheat_temp = 75 << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) x.overheat_hyst = 70 << 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) write_reg( x.thermostat, 2, x.overheat_hyst, 2 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) write_reg( x.thermostat, 3, x.overheat_temp, 2 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) print_temp("Reducing overheating limit to ", x.overheat_temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) print_temp(" (Hyst: ", x.overheat_hyst );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) printk(")\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) /* set an initial fan setting */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) x.downind = 0xffff;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) x.upind = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) /* tune_fan( fan_up_table[x.upind].fan_setting ); */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) err = device_create_file( &x.of_dev->dev, &dev_attr_cpu_temperature );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) err |= device_create_file( &x.of_dev->dev, &dev_attr_case_temperature );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) if (err)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) printk(KERN_WARNING
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) "Failed to create temperature attribute file(s).\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) restore_regs( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) device_remove_file( &x.of_dev->dev, &dev_attr_cpu_temperature );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) device_remove_file( &x.of_dev->dev, &dev_attr_case_temperature );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) write_reg( x.fan, 0x01, x.r1, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) write_reg( x.fan, 0x20, x.r20, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) write_reg( x.fan, 0x23, x.r23, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) write_reg( x.fan, 0x25, x.r25, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) write_reg( x.fan, 0x00, x.r0, 1 );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) static int control_loop(void *dummy)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) mutex_lock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) setup_hardware();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) mutex_unlock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) for (;;) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) msleep_interruptible(8000);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) if (kthread_should_stop())
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) mutex_lock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) poll_temp();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) mutex_unlock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) mutex_lock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) restore_regs();
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) mutex_unlock(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) /* i2c probing and setup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) static void do_attach(struct i2c_adapter *adapter)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) struct i2c_board_info info = { };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) /* scan 0x48-0x4f (DS1775) and 0x2c-2x2f (ADM1030) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) static const unsigned short scan_ds1775[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) I2C_CLIENT_END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) static const unsigned short scan_adm1030[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 0x2c, 0x2d, 0x2e, 0x2f,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) I2C_CLIENT_END
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) if (x.running || strncmp(adapter->name, "uni-n", 5))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) return;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) np = of_find_compatible_node(adapter->dev.of_node, NULL, "MAC,ds1775");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) strlcpy(info.type, "MAC,ds1775", I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) i2c_new_scanned_device(adapter, &info, scan_ds1775, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) np = of_find_compatible_node(adapter->dev.of_node, NULL, "MAC,adm1030");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) if (np) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) strlcpy(info.type, "MAC,adm1030", I2C_NAME_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) i2c_new_scanned_device(adapter, &info, scan_adm1030, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) do_remove(struct i2c_client *client)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) if (x.running) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) x.running = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) kthread_stop(x.poll_task);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) x.poll_task = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (client == x.thermostat)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) x.thermostat = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) else if (client == x.fan)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) x.fan = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) printk(KERN_ERR "g4fan: bad client\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) attach_fan( struct i2c_client *cl )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) if( x.fan )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) /* check that this is an ADM1030 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) if( read_reg(cl, 0x3d, 1) != 0x30 || read_reg(cl, 0x3e, 1) != 0x41 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) printk("ADM1030 fan controller [@%02x]\n", cl->addr );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) x.fan = cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) attach_thermostat( struct i2c_client *cl )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) int hyst_temp, os_temp, temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) if( x.thermostat )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) if( (temp=read_reg(cl, 0, 2)) < 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) /* temperature sanity check */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) if( temp < 0x1600 || temp > 0x3c00 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) hyst_temp = read_reg(cl, 2, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) os_temp = read_reg(cl, 3, 2);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) if( hyst_temp < 0 || os_temp < 0 )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) goto out;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) printk("DS1775 digital thermometer [@%02x]\n", cl->addr );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) print_temp("Temp: ", temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) print_temp(" Hyst: ", hyst_temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) print_temp(" OS: ", os_temp );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) printk("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) x.temp = temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) x.overheat_temp = os_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) x.overheat_hyst = hyst_temp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) x.thermostat = cl;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) out:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) return 0;
^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) enum chip { ds1775, adm1030 };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) static const struct i2c_device_id therm_windtunnel_id[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) { "MAC,ds1775", ds1775 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) { "MAC,adm1030", adm1030 },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) { }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) MODULE_DEVICE_TABLE(i2c, therm_windtunnel_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) do_probe(struct i2c_client *cl, const struct i2c_device_id *id)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) struct i2c_adapter *adapter = cl->adapter;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) int ret = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) if( !i2c_check_functionality(adapter, I2C_FUNC_SMBUS_WORD_DATA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) | I2C_FUNC_SMBUS_WRITE_BYTE) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) switch (id->driver_data) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) case adm1030:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) ret = attach_fan(cl);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) case ds1775:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) ret = attach_thermostat(cl);
^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)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) if (!x.running && x.thermostat && x.fan) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) x.running = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) x.poll_task = kthread_run(control_loop, NULL, "g4fand");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) static struct i2c_driver g4fan_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) .name = "therm_windtunnel",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) .probe = do_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) .remove = do_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) .id_table = therm_windtunnel_id,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) /* initialization / cleanup */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) /************************************************************************/
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) static int therm_of_probe(struct platform_device *dev)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) struct i2c_adapter *adap;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) int ret, i = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) adap = i2c_get_adapter(0);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) if (!adap)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) return -EPROBE_DEFER;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) ret = i2c_add_driver(&g4fan_driver);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) if (ret) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) i2c_put_adapter(adap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) /* We assume Macs have consecutive I2C bus numbers starting at 0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) while (adap) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) do_attach(adap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) if (x.running)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) i2c_put_adapter(adap);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) adap = i2c_get_adapter(++i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) therm_of_remove( struct platform_device *dev )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) i2c_del_driver( &g4fan_driver );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) static const struct of_device_id therm_of_match[] = {{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) .name = "fan",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) .compatible = "adm1030"
^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) MODULE_DEVICE_TABLE(of, therm_of_match);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) static struct platform_driver therm_of_driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) .driver = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) .name = "temperature",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) .of_match_table = therm_of_match,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) },
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) .probe = therm_of_probe,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) .remove = therm_of_remove,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) struct apple_thermal_info {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) u8 id; /* implementation ID */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) u8 fan_count; /* number of fans */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) u8 thermostat_count; /* number of thermostats */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) u8 unused;
^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) static int __init
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513) g4fan_init( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) const struct apple_thermal_info *info;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) struct device_node *np;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) mutex_init(&x.lock);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) if( !(np=of_find_node_by_name(NULL, "power-mgt")) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) info = of_get_property(np, "thermal-info", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) of_node_put(np);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) if( !info || !of_machine_is_compatible("PowerMac3,6") )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) if( info->id != 3 ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) printk(KERN_ERR "therm_windtunnel: unsupported thermal design %d\n", info->id );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) if( !(np=of_find_node_by_name(NULL, "fan")) )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) x.of_dev = of_platform_device_create(np, "temperature", NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) of_node_put( np );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) if( !x.of_dev ) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) printk(KERN_ERR "Can't register fan controller!\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539) return -ENODEV;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) platform_driver_register( &therm_of_driver );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) static void __exit
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) g4fan_exit( void )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) platform_driver_unregister( &therm_of_driver );
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) if( x.of_dev )
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) of_device_unregister( x.of_dev );
^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) module_init(g4fan_init);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) module_exit(g4fan_exit);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) MODULE_AUTHOR("Samuel Rydh <samuel@ibrium.se>");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559) MODULE_DESCRIPTION("Apple G4 (windtunnel) fan controller");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) MODULE_LICENSE("GPL");
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
3 Commits
0 Branches
0 Tags