12c162f9bSThomas Gleixner /* SPDX-License-Identifier: GPL-2.0-only */ 26cd32099SBenjamin Herrenschmidt /* 36cd32099SBenjamin Herrenschmidt * Windfarm PowerMac thermal control 46cd32099SBenjamin Herrenschmidt * 56cd32099SBenjamin Herrenschmidt * Copyright 2012 Benjamin Herrenschmidt, IBM Corp. 66cd32099SBenjamin Herrenschmidt */ 76cd32099SBenjamin Herrenschmidt 86cd32099SBenjamin Herrenschmidt #ifndef __WINDFARM_MPU_H 96cd32099SBenjamin Herrenschmidt #define __WINDFARM_MPU_H 106cd32099SBenjamin Herrenschmidt 11*a486e512SChristophe Leroy #include <linux/of.h> 12*a486e512SChristophe Leroy 136cd32099SBenjamin Herrenschmidt typedef unsigned short fu16; 146cd32099SBenjamin Herrenschmidt typedef int fs32; 156cd32099SBenjamin Herrenschmidt typedef short fs16; 166cd32099SBenjamin Herrenschmidt 176cd32099SBenjamin Herrenschmidt /* Definition of the MPU data structure which contains per CPU 186cd32099SBenjamin Herrenschmidt * calibration information (among others) for the G5 machines 196cd32099SBenjamin Herrenschmidt */ 206cd32099SBenjamin Herrenschmidt struct mpu_data 216cd32099SBenjamin Herrenschmidt { 226cd32099SBenjamin Herrenschmidt u8 signature; /* 0x00 - EEPROM sig. */ 236cd32099SBenjamin Herrenschmidt u8 bytes_used; /* 0x01 - Bytes used in eeprom (160 ?) */ 246cd32099SBenjamin Herrenschmidt u8 size; /* 0x02 - EEPROM size (256 ?) */ 256cd32099SBenjamin Herrenschmidt u8 version; /* 0x03 - EEPROM version */ 266cd32099SBenjamin Herrenschmidt u32 data_revision; /* 0x04 - Dataset revision */ 276cd32099SBenjamin Herrenschmidt u8 processor_bin_code[3]; /* 0x08 - Processor BIN code */ 286cd32099SBenjamin Herrenschmidt u8 bin_code_expansion; /* 0x0b - ??? (padding ?) */ 296cd32099SBenjamin Herrenschmidt u8 processor_num; /* 0x0c - Number of CPUs on this MPU */ 306cd32099SBenjamin Herrenschmidt u8 input_mul_bus_div; /* 0x0d - Clock input multiplier/bus divider */ 316cd32099SBenjamin Herrenschmidt u8 reserved1[2]; /* 0x0e - */ 326cd32099SBenjamin Herrenschmidt u32 input_clk_freq_high; /* 0x10 - Input clock frequency high */ 336cd32099SBenjamin Herrenschmidt u8 cpu_nb_target_cycles; /* 0x14 - ??? */ 346cd32099SBenjamin Herrenschmidt u8 cpu_statlat; /* 0x15 - ??? */ 356cd32099SBenjamin Herrenschmidt u8 cpu_snooplat; /* 0x16 - ??? */ 366cd32099SBenjamin Herrenschmidt u8 cpu_snoopacc; /* 0x17 - ??? */ 376cd32099SBenjamin Herrenschmidt u8 nb_paamwin; /* 0x18 - ??? */ 386cd32099SBenjamin Herrenschmidt u8 nb_statlat; /* 0x19 - ??? */ 396cd32099SBenjamin Herrenschmidt u8 nb_snooplat; /* 0x1a - ??? */ 406cd32099SBenjamin Herrenschmidt u8 nb_snoopwin; /* 0x1b - ??? */ 416cd32099SBenjamin Herrenschmidt u8 api_bus_mode; /* 0x1c - ??? */ 426cd32099SBenjamin Herrenschmidt u8 reserved2[3]; /* 0x1d - */ 436cd32099SBenjamin Herrenschmidt u32 input_clk_freq_low; /* 0x20 - Input clock frequency low */ 446cd32099SBenjamin Herrenschmidt u8 processor_card_slot; /* 0x24 - Processor card slot number */ 456cd32099SBenjamin Herrenschmidt u8 reserved3[2]; /* 0x25 - */ 466cd32099SBenjamin Herrenschmidt u8 padjmax; /* 0x27 - Max power adjustment (Not in OF!) */ 476cd32099SBenjamin Herrenschmidt u8 ttarget; /* 0x28 - Target temperature */ 486cd32099SBenjamin Herrenschmidt u8 tmax; /* 0x29 - Max temperature */ 496cd32099SBenjamin Herrenschmidt u8 pmaxh; /* 0x2a - Max power */ 506cd32099SBenjamin Herrenschmidt u8 tguardband; /* 0x2b - Guardband temp ??? Hist. len in OSX */ 516cd32099SBenjamin Herrenschmidt fs32 pid_gp; /* 0x2c - PID proportional gain */ 526cd32099SBenjamin Herrenschmidt fs32 pid_gr; /* 0x30 - PID reset gain */ 536cd32099SBenjamin Herrenschmidt fs32 pid_gd; /* 0x34 - PID derivative gain */ 546cd32099SBenjamin Herrenschmidt fu16 voph; /* 0x38 - Vop High */ 556cd32099SBenjamin Herrenschmidt fu16 vopl; /* 0x3a - Vop Low */ 566cd32099SBenjamin Herrenschmidt fs16 nactual_die; /* 0x3c - nActual Die */ 576cd32099SBenjamin Herrenschmidt fs16 nactual_heatsink; /* 0x3e - nActual Heatsink */ 586cd32099SBenjamin Herrenschmidt fs16 nactual_system; /* 0x40 - nActual System */ 596cd32099SBenjamin Herrenschmidt u16 calibration_flags; /* 0x42 - Calibration flags */ 606cd32099SBenjamin Herrenschmidt fu16 mdiode; /* 0x44 - Diode M value (scaling factor) */ 616cd32099SBenjamin Herrenschmidt fs16 bdiode; /* 0x46 - Diode B value (offset) */ 626cd32099SBenjamin Herrenschmidt fs32 theta_heat_sink; /* 0x48 - Theta heat sink */ 636cd32099SBenjamin Herrenschmidt u16 rminn_intake_fan; /* 0x4c - Intake fan min RPM */ 646cd32099SBenjamin Herrenschmidt u16 rmaxn_intake_fan; /* 0x4e - Intake fan max RPM */ 656cd32099SBenjamin Herrenschmidt u16 rminn_exhaust_fan; /* 0x50 - Exhaust fan min RPM */ 666cd32099SBenjamin Herrenschmidt u16 rmaxn_exhaust_fan; /* 0x52 - Exhaust fan max RPM */ 676cd32099SBenjamin Herrenschmidt u8 processor_part_num[8]; /* 0x54 - Processor part number XX pumps min/max */ 686cd32099SBenjamin Herrenschmidt u32 processor_lot_num; /* 0x5c - Processor lot number */ 696cd32099SBenjamin Herrenschmidt u8 orig_card_sernum[0x10]; /* 0x60 - Card original serial number */ 706cd32099SBenjamin Herrenschmidt u8 curr_card_sernum[0x10]; /* 0x70 - Card current serial number */ 716cd32099SBenjamin Herrenschmidt u8 mlb_sernum[0x18]; /* 0x80 - MLB serial number */ 726cd32099SBenjamin Herrenschmidt u32 checksum1; /* 0x98 - */ 736cd32099SBenjamin Herrenschmidt u32 checksum2; /* 0x9c - */ 746cd32099SBenjamin Herrenschmidt }; /* Total size = 0xa0 */ 756cd32099SBenjamin Herrenschmidt wf_get_mpu(int cpu)766cd32099SBenjamin Herrenschmidtstatic inline const struct mpu_data *wf_get_mpu(int cpu) 776cd32099SBenjamin Herrenschmidt { 786cd32099SBenjamin Herrenschmidt struct device_node *np; 796cd32099SBenjamin Herrenschmidt char nodename[64]; 806cd32099SBenjamin Herrenschmidt const void *data; 816cd32099SBenjamin Herrenschmidt int len; 826cd32099SBenjamin Herrenschmidt 836cd32099SBenjamin Herrenschmidt /* 846cd32099SBenjamin Herrenschmidt * prom.c routine for finding a node by path is a bit brain dead 856cd32099SBenjamin Herrenschmidt * and requires exact @xxx unit numbers. This is a bit ugly but 866cd32099SBenjamin Herrenschmidt * will work for these machines 876cd32099SBenjamin Herrenschmidt */ 886cd32099SBenjamin Herrenschmidt sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0); 896cd32099SBenjamin Herrenschmidt np = of_find_node_by_path(nodename); 906cd32099SBenjamin Herrenschmidt if (!np) 916cd32099SBenjamin Herrenschmidt return NULL; 926cd32099SBenjamin Herrenschmidt data = of_get_property(np, "cpuid", &len); 936cd32099SBenjamin Herrenschmidt of_node_put(np); 946cd32099SBenjamin Herrenschmidt if (!data) 956cd32099SBenjamin Herrenschmidt return NULL; 966cd32099SBenjamin Herrenschmidt 976cd32099SBenjamin Herrenschmidt /* 986cd32099SBenjamin Herrenschmidt * We are naughty, we have dropped the reference to the device 996cd32099SBenjamin Herrenschmidt * node and still return a pointer to the content. We know we 1006cd32099SBenjamin Herrenschmidt * can do that though as this is only ever called on PowerMac 1016cd32099SBenjamin Herrenschmidt * which cannot remove those nodes 1026cd32099SBenjamin Herrenschmidt */ 1036cd32099SBenjamin Herrenschmidt return data; 1046cd32099SBenjamin Herrenschmidt } 1056cd32099SBenjamin Herrenschmidt 1066cd32099SBenjamin Herrenschmidt #endif /* __WINDFARM_MPU_H */ 107