1*4882a593Smuzhiyun /* SPDX-License-Identifier: GPL-2.0-only */ 2*4882a593Smuzhiyun /* 3*4882a593Smuzhiyun * Windfarm PowerMac thermal control 4*4882a593Smuzhiyun * 5*4882a593Smuzhiyun * Copyright 2012 Benjamin Herrenschmidt, IBM Corp. 6*4882a593Smuzhiyun */ 7*4882a593Smuzhiyun 8*4882a593Smuzhiyun #ifndef __WINDFARM_MPU_H 9*4882a593Smuzhiyun #define __WINDFARM_MPU_H 10*4882a593Smuzhiyun 11*4882a593Smuzhiyun typedef unsigned short fu16; 12*4882a593Smuzhiyun typedef int fs32; 13*4882a593Smuzhiyun typedef short fs16; 14*4882a593Smuzhiyun 15*4882a593Smuzhiyun /* Definition of the MPU data structure which contains per CPU 16*4882a593Smuzhiyun * calibration information (among others) for the G5 machines 17*4882a593Smuzhiyun */ 18*4882a593Smuzhiyun struct mpu_data 19*4882a593Smuzhiyun { 20*4882a593Smuzhiyun u8 signature; /* 0x00 - EEPROM sig. */ 21*4882a593Smuzhiyun u8 bytes_used; /* 0x01 - Bytes used in eeprom (160 ?) */ 22*4882a593Smuzhiyun u8 size; /* 0x02 - EEPROM size (256 ?) */ 23*4882a593Smuzhiyun u8 version; /* 0x03 - EEPROM version */ 24*4882a593Smuzhiyun u32 data_revision; /* 0x04 - Dataset revision */ 25*4882a593Smuzhiyun u8 processor_bin_code[3]; /* 0x08 - Processor BIN code */ 26*4882a593Smuzhiyun u8 bin_code_expansion; /* 0x0b - ??? (padding ?) */ 27*4882a593Smuzhiyun u8 processor_num; /* 0x0c - Number of CPUs on this MPU */ 28*4882a593Smuzhiyun u8 input_mul_bus_div; /* 0x0d - Clock input multiplier/bus divider */ 29*4882a593Smuzhiyun u8 reserved1[2]; /* 0x0e - */ 30*4882a593Smuzhiyun u32 input_clk_freq_high; /* 0x10 - Input clock frequency high */ 31*4882a593Smuzhiyun u8 cpu_nb_target_cycles; /* 0x14 - ??? */ 32*4882a593Smuzhiyun u8 cpu_statlat; /* 0x15 - ??? */ 33*4882a593Smuzhiyun u8 cpu_snooplat; /* 0x16 - ??? */ 34*4882a593Smuzhiyun u8 cpu_snoopacc; /* 0x17 - ??? */ 35*4882a593Smuzhiyun u8 nb_paamwin; /* 0x18 - ??? */ 36*4882a593Smuzhiyun u8 nb_statlat; /* 0x19 - ??? */ 37*4882a593Smuzhiyun u8 nb_snooplat; /* 0x1a - ??? */ 38*4882a593Smuzhiyun u8 nb_snoopwin; /* 0x1b - ??? */ 39*4882a593Smuzhiyun u8 api_bus_mode; /* 0x1c - ??? */ 40*4882a593Smuzhiyun u8 reserved2[3]; /* 0x1d - */ 41*4882a593Smuzhiyun u32 input_clk_freq_low; /* 0x20 - Input clock frequency low */ 42*4882a593Smuzhiyun u8 processor_card_slot; /* 0x24 - Processor card slot number */ 43*4882a593Smuzhiyun u8 reserved3[2]; /* 0x25 - */ 44*4882a593Smuzhiyun u8 padjmax; /* 0x27 - Max power adjustment (Not in OF!) */ 45*4882a593Smuzhiyun u8 ttarget; /* 0x28 - Target temperature */ 46*4882a593Smuzhiyun u8 tmax; /* 0x29 - Max temperature */ 47*4882a593Smuzhiyun u8 pmaxh; /* 0x2a - Max power */ 48*4882a593Smuzhiyun u8 tguardband; /* 0x2b - Guardband temp ??? Hist. len in OSX */ 49*4882a593Smuzhiyun fs32 pid_gp; /* 0x2c - PID proportional gain */ 50*4882a593Smuzhiyun fs32 pid_gr; /* 0x30 - PID reset gain */ 51*4882a593Smuzhiyun fs32 pid_gd; /* 0x34 - PID derivative gain */ 52*4882a593Smuzhiyun fu16 voph; /* 0x38 - Vop High */ 53*4882a593Smuzhiyun fu16 vopl; /* 0x3a - Vop Low */ 54*4882a593Smuzhiyun fs16 nactual_die; /* 0x3c - nActual Die */ 55*4882a593Smuzhiyun fs16 nactual_heatsink; /* 0x3e - nActual Heatsink */ 56*4882a593Smuzhiyun fs16 nactual_system; /* 0x40 - nActual System */ 57*4882a593Smuzhiyun u16 calibration_flags; /* 0x42 - Calibration flags */ 58*4882a593Smuzhiyun fu16 mdiode; /* 0x44 - Diode M value (scaling factor) */ 59*4882a593Smuzhiyun fs16 bdiode; /* 0x46 - Diode B value (offset) */ 60*4882a593Smuzhiyun fs32 theta_heat_sink; /* 0x48 - Theta heat sink */ 61*4882a593Smuzhiyun u16 rminn_intake_fan; /* 0x4c - Intake fan min RPM */ 62*4882a593Smuzhiyun u16 rmaxn_intake_fan; /* 0x4e - Intake fan max RPM */ 63*4882a593Smuzhiyun u16 rminn_exhaust_fan; /* 0x50 - Exhaust fan min RPM */ 64*4882a593Smuzhiyun u16 rmaxn_exhaust_fan; /* 0x52 - Exhaust fan max RPM */ 65*4882a593Smuzhiyun u8 processor_part_num[8]; /* 0x54 - Processor part number XX pumps min/max */ 66*4882a593Smuzhiyun u32 processor_lot_num; /* 0x5c - Processor lot number */ 67*4882a593Smuzhiyun u8 orig_card_sernum[0x10]; /* 0x60 - Card original serial number */ 68*4882a593Smuzhiyun u8 curr_card_sernum[0x10]; /* 0x70 - Card current serial number */ 69*4882a593Smuzhiyun u8 mlb_sernum[0x18]; /* 0x80 - MLB serial number */ 70*4882a593Smuzhiyun u32 checksum1; /* 0x98 - */ 71*4882a593Smuzhiyun u32 checksum2; /* 0x9c - */ 72*4882a593Smuzhiyun }; /* Total size = 0xa0 */ 73*4882a593Smuzhiyun wf_get_mpu(int cpu)74*4882a593Smuzhiyunstatic inline const struct mpu_data *wf_get_mpu(int cpu) 75*4882a593Smuzhiyun { 76*4882a593Smuzhiyun struct device_node *np; 77*4882a593Smuzhiyun char nodename[64]; 78*4882a593Smuzhiyun const void *data; 79*4882a593Smuzhiyun int len; 80*4882a593Smuzhiyun 81*4882a593Smuzhiyun /* 82*4882a593Smuzhiyun * prom.c routine for finding a node by path is a bit brain dead 83*4882a593Smuzhiyun * and requires exact @xxx unit numbers. This is a bit ugly but 84*4882a593Smuzhiyun * will work for these machines 85*4882a593Smuzhiyun */ 86*4882a593Smuzhiyun sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0); 87*4882a593Smuzhiyun np = of_find_node_by_path(nodename); 88*4882a593Smuzhiyun if (!np) 89*4882a593Smuzhiyun return NULL; 90*4882a593Smuzhiyun data = of_get_property(np, "cpuid", &len); 91*4882a593Smuzhiyun of_node_put(np); 92*4882a593Smuzhiyun if (!data) 93*4882a593Smuzhiyun return NULL; 94*4882a593Smuzhiyun 95*4882a593Smuzhiyun /* 96*4882a593Smuzhiyun * We are naughty, we have dropped the reference to the device 97*4882a593Smuzhiyun * node and still return a pointer to the content. We know we 98*4882a593Smuzhiyun * can do that though as this is only ever called on PowerMac 99*4882a593Smuzhiyun * which cannot remove those nodes 100*4882a593Smuzhiyun */ 101*4882a593Smuzhiyun return data; 102*4882a593Smuzhiyun } 103*4882a593Smuzhiyun 104*4882a593Smuzhiyun #endif /* __WINDFARM_MPU_H */ 105