2019-06-03 08:45:02 +03:00
/* SPDX-License-Identifier: GPL-2.0-only */
2012-04-29 19:42:27 +04:00
/*
* Windfarm PowerMac thermal control
*
* Copyright 2012 Benjamin Herrenschmidt , IBM Corp .
*/
# ifndef __WINDFARM_MPU_H
# define __WINDFARM_MPU_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 */
