projects / mirror_ubuntu-jammy-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 2c162f9b | 1 | /* SPDX-License-Identifier: GPL-2.0-only */ |
| 6cd32099 BH |
2 | /* |
| 3 | * Windfarm PowerMac thermal control | |
| 4 | * | |
| 5 | * Copyright 2012 Benjamin Herrenschmidt, IBM Corp. | |
| 6cd32099 BH |
6 | */ |
| 7 | ||
| 8 | #ifndef __WINDFARM_MPU_H | |
| 9 | #define __WINDFARM_MPU_H | |
| 10 | ||
| 11 | typedef unsigned short fu16; | |
| 12 | typedef int fs32; | |
| 13 | typedef short fs16; | |
| 14 | ||
| 15 | /* Definition of the MPU data structure which contains per CPU | |
| 16 | * calibration information (among others) for the G5 machines | |
| 17 | */ | |
| 18 | struct mpu_data | |
| 19 | { | |
| 20 | u8 signature; /* 0x00 - EEPROM sig. */ | |
| 21 | u8 bytes_used; /* 0x01 - Bytes used in eeprom (160 ?) */ | |
| 22 | u8 size; /* 0x02 - EEPROM size (256 ?) */ | |
| 23 | u8 version; /* 0x03 - EEPROM version */ | |
| 24 | u32 data_revision; /* 0x04 - Dataset revision */ | |
| 25 | u8 processor_bin_code[3]; /* 0x08 - Processor BIN code */ | |
| 26 | u8 bin_code_expansion; /* 0x0b - ??? (padding ?) */ | |
| 27 | u8 processor_num; /* 0x0c - Number of CPUs on this MPU */ | |
| 28 | u8 input_mul_bus_div; /* 0x0d - Clock input multiplier/bus divider */ | |
| 29 | u8 reserved1[2]; /* 0x0e - */ | |
| 30 | u32 input_clk_freq_high; /* 0x10 - Input clock frequency high */ | |
| 31 | u8 cpu_nb_target_cycles; /* 0x14 - ??? */ | |
| 32 | u8 cpu_statlat; /* 0x15 - ??? */ | |
| 33 | u8 cpu_snooplat; /* 0x16 - ??? */ | |
| 34 | u8 cpu_snoopacc; /* 0x17 - ??? */ | |
| 35 | u8 nb_paamwin; /* 0x18 - ??? */ | |
| 36 | u8 nb_statlat; /* 0x19 - ??? */ | |
| 37 | u8 nb_snooplat; /* 0x1a - ??? */ | |
| 38 | u8 nb_snoopwin; /* 0x1b - ??? */ | |
| 39 | u8 api_bus_mode; /* 0x1c - ??? */ | |
| 40 | u8 reserved2[3]; /* 0x1d - */ | |
| 41 | u32 input_clk_freq_low; /* 0x20 - Input clock frequency low */ | |
| 42 | u8 processor_card_slot; /* 0x24 - Processor card slot number */ | |
| 43 | u8 reserved3[2]; /* 0x25 - */ | |
| 44 | u8 padjmax; /* 0x27 - Max power adjustment (Not in OF!) */ | |
| 45 | u8 ttarget; /* 0x28 - Target temperature */ | |
| 46 | u8 tmax; /* 0x29 - Max temperature */ | |
| 47 | u8 pmaxh; /* 0x2a - Max power */ | |
| 48 | u8 tguardband; /* 0x2b - Guardband temp ??? Hist. len in OSX */ | |
| 49 | fs32 pid_gp; /* 0x2c - PID proportional gain */ | |
| 50 | fs32 pid_gr; /* 0x30 - PID reset gain */ | |
| 51 | fs32 pid_gd; /* 0x34 - PID derivative gain */ | |
| 52 | fu16 voph; /* 0x38 - Vop High */ | |
| 53 | fu16 vopl; /* 0x3a - Vop Low */ | |
| 54 | fs16 nactual_die; /* 0x3c - nActual Die */ | |
| 55 | fs16 nactual_heatsink; /* 0x3e - nActual Heatsink */ | |
| 56 | fs16 nactual_system; /* 0x40 - nActual System */ | |
| 57 | u16 calibration_flags; /* 0x42 - Calibration flags */ | |
| 58 | fu16 mdiode; /* 0x44 - Diode M value (scaling factor) */ | |
| 59 | fs16 bdiode; /* 0x46 - Diode B value (offset) */ | |
| 60 | fs32 theta_heat_sink; /* 0x48 - Theta heat sink */ | |
| 61 | u16 rminn_intake_fan; /* 0x4c - Intake fan min RPM */ | |
| 62 | u16 rmaxn_intake_fan; /* 0x4e - Intake fan max RPM */ | |
| 63 | u16 rminn_exhaust_fan; /* 0x50 - Exhaust fan min RPM */ | |
| 64 | u16 rmaxn_exhaust_fan; /* 0x52 - Exhaust fan max RPM */ | |
| 65 | u8 processor_part_num[8]; /* 0x54 - Processor part number XX pumps min/max */ | |
| 66 | u32 processor_lot_num; /* 0x5c - Processor lot number */ | |
| 67 | u8 orig_card_sernum[0x10]; /* 0x60 - Card original serial number */ | |
| 68 | u8 curr_card_sernum[0x10]; /* 0x70 - Card current serial number */ | |
| 69 | u8 mlb_sernum[0x18]; /* 0x80 - MLB serial number */ | |
| 70 | u32 checksum1; /* 0x98 - */ | |
| 71 | u32 checksum2; /* 0x9c - */ | |
| 72 | }; /* Total size = 0xa0 */ | |
| 73 | ||
| 74 | static inline const struct mpu_data *wf_get_mpu(int cpu) | |
| 75 | { | |
| 76 | struct device_node *np; | |
| 77 | char nodename[64]; | |
| 78 | const void *data; | |
| 79 | int len; | |
| 80 | ||
| 81 | /* | |
| 82 | * prom.c routine for finding a node by path is a bit brain dead | |
| 83 | * and requires exact @xxx unit numbers. This is a bit ugly but | |
| 84 | * will work for these machines | |
| 85 | */ | |
| 86 | sprintf(nodename, "/u3@0,f8000000/i2c@f8001000/cpuid@a%d", cpu ? 2 : 0); | |
| 87 | np = of_find_node_by_path(nodename); | |
| 88 | if (!np) | |
| 89 | return NULL; | |
| 90 | data = of_get_property(np, "cpuid", &len); | |
| 91 | of_node_put(np); | |
| 92 | if (!data) | |
| 93 | return NULL; | |
| 94 | ||
| 95 | /* | |
| 96 | * We are naughty, we have dropped the reference to the device | |
| 97 | * node and still return a pointer to the content. We know we | |
| 98 | * can do that though as this is only ever called on PowerMac | |
| 99 | * which cannot remove those nodes | |
| 100 | */ | |
| 101 | return data; | |
| 102 | } | |
| 103 | ||
| 104 | #endif /* __WINDFARM_MPU_H */ |