| /* SPDX-License-Identifier: GPL-2.0-only */ |
| /* |
| * Windfarm PowerMac thermal control |
| * |
| * Copyright 2012 Benjamin Herrenschmidt, IBM Corp. |
| */ |
| |
| #ifndef __WINDFARM_MPU_H |
| #define __WINDFARM_MPU_H |
| |
| #include <linux/of.h> |
| |
| typedef unsigned short fu16; |
| typedef int fs32; |
| typedef short fs16; |
| |
| /* Definition of the MPU data structure which contains per CPU |
| * calibration information (among others) for the G5 machines |
| */ |
| struct mpu_data |
| { |
| u8 signature; /* 0x00 - EEPROM sig. */ |
| u8 bytes_used; /* 0x01 - Bytes used in eeprom (160 ?) */ |
| u8 size; /* 0x02 - EEPROM size (256 ?) */ |
| u8 version; /* 0x03 - EEPROM version */ |
| u32 data_revision; /* 0x04 - Dataset revision */ |
| u8 processor_bin_code[3]; /* 0x08 - Processor BIN code */ |
| u8 bin_code_expansion; /* 0x0b - ??? (padding ?) */ |
| u8 processor_num; /* 0x0c - Number of CPUs on this MPU */ |
| u8 input_mul_bus_div; /* 0x0d - Clock input multiplier/bus divider */ |
| u8 reserved1[2]; /* 0x0e - */ |
| u32 input_clk_freq_high; /* 0x10 - Input clock frequency high */ |
| u8 cpu_nb_target_cycles; /* 0x14 - ??? */ |
| u8 cpu_statlat; /* 0x15 - ??? */ |
| u8 cpu_snooplat; /* 0x16 - ??? */ |
| u8 cpu_snoopacc; /* 0x17 - ??? */ |
| u8 nb_paamwin; /* 0x18 - ??? */ |
| u8 nb_statlat; /* 0x19 - ??? */ |
| u8 nb_snooplat; /* 0x1a - ??? */ |
| u8 nb_snoopwin; /* 0x1b - ??? */ |
| u8 api_bus_mode; /* 0x1c - ??? */ |
| u8 reserved2[3]; /* 0x1d - */ |
| u32 input_clk_freq_low; /* 0x20 - Input clock frequency low */ |
| u8 processor_card_slot; /* 0x24 - Processor card slot number */ |
| u8 reserved3[2]; /* 0x25 - */ |
| u8 padjmax; /* 0x27 - Max power adjustment (Not in OF!) */ |
| u8 ttarget; /* 0x28 - Target temperature */ |
| u8 tmax; /* 0x29 - Max temperature */ |
| u8 pmaxh; /* 0x2a - Max power */ |
| u8 tguardband; /* 0x2b - Guardband temp ??? Hist. len in OSX */ |
| fs32 pid_gp; /* 0x2c - PID proportional gain */ |
| fs32 pid_gr; /* 0x30 - PID reset gain */ |
| fs32 pid_gd; /* 0x34 - PID derivative gain */ |
| fu16 voph; /* 0x38 - Vop High */ |
| fu16 vopl; /* 0x3a - Vop Low */ |
| fs16 nactual_die; /* 0x3c - nActual Die */ |
| fs16 nactual_heatsink; /* 0x3e - nActual Heatsink */ |
| fs16 nactual_system; /* 0x40 - nActual System */ |
| u16 calibration_flags; /* 0x42 - Calibration flags */ |
| fu16 mdiode; /* 0x44 - Diode M value (scaling factor) */ |
| fs16 bdiode; /* 0x46 - Diode B value (offset) */ |
| fs32 theta_heat_sink; /* 0x48 - Theta heat sink */ |
| u16 rminn_intake_fan; /* 0x4c - Intake fan min RPM */ |
| u16 rmaxn_intake_fan; /* 0x4e - Intake fan max RPM */ |
| u16 rminn_exhaust_fan; /* 0x50 - Exhaust fan min RPM */ |
| u16 rmaxn_exhaust_fan; /* 0x52 - Exhaust fan max RPM */ |
| u8 processor_part_num[8]; /* 0x54 - Processor part number XX pumps min/max */ |
| u32 processor_lot_num; /* 0x5c - Processor lot number */ |
| u8 orig_card_sernum[0x10]; /* 0x60 - Card original serial number */ |
| u8 curr_card_sernum[0x10]; /* 0x70 - Card current serial number */ |
| u8 mlb_sernum[0x18]; /* 0x80 - MLB serial number */ |
| u32 checksum1; /* 0x98 - */ |
| u32 checksum2; /* 0x9c - */ |
| }; /* Total size = 0xa0 */ |
| |
| static inline const struct mpu_data *wf_get_mpu(int cpu) |
| { |
| struct device_node *np; |
| char nodename[64]; |
| const void *data; |
| int len; |
| |
| /* |
| * prom.c routine for finding a node by path is a bit brain dead |
| * and requires exact @xxx unit numbers. This is a bit ugly but |
| * will work for these machines |
| */ |
| sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0); |
| np = of_find_node_by_path(nodename); |
| if (!np) |
| return NULL; |
| data = of_get_property(np, "cpuid", &len); |
| of_node_put(np); |
| if (!data) |
| return NULL; |
| |
| /* |
| * We are naughty, we have dropped the reference to the device |
| * node and still return a pointer to the content. We know we |
| * can do that though as this is only ever called on PowerMac |
| * which cannot remove those nodes |
| */ |
| return data; |
| } |
| |
| #endif /* __WINDFARM_MPU_H */ |
