ppc32: Add thermal management drivers

Adds thermal management drivers for desktop G5, Windtunnel G4s, and
recent laptops (iBook G4, aluminium 15" and 17" powerbooks)

drivers/macintosh/Kconfig

@@ -127,6 +127,28 @@ config MAC_EMUMOUSEBTN
 
 	  If you have an Apple machine with a 1-button mouse, say Y here.
 
+config THERM_WINDTUNNEL
+	tristate "Support for thermal management on Windtunnel G4s"
+	depends on I2C && I2C_KEYWEST && !POWER4
+	help
+	  This driver provides some thermostat and fan control for the desktop
+	  G4 "Windtunnel"
+
+config THERM_ADT7467
+	tristate "Support for thermal mgmnt on laptops with ADT 7467 chipset"
+	depends on I2C && I2C_KEYWEST && !POWER4
+	help
+	  This driver provides some thermostat and fan control for the
+          iBook G4, and the ATI based aluminium PowerBooks, allowing slighlty
+	  better fan behaviour by default, and some manual control.
+
+config THERM_PM72
+	tristate "Support for thermal management on PowerMac G5"
+	depends on I2C && I2C_KEYWEST && POWER4
+	help
+	  This driver provides thermostat and fan control for the desktop
+	  G5 machines. 
+
 config ANSLCD
 	bool "Support for ANS LCD display"
 	depends on ADB_CUDA

drivers/macintosh/Makefile

@@ -22,3 +22,7 @@ obj-$(CONFIG_ADB_MACIISI)	+= via-maciisi.o
 obj-$(CONFIG_ADB_IOP)		+= adb-iop.o
 obj-$(CONFIG_ADB_PMU68K)	+= via-pmu68k.o
 obj-$(CONFIG_ADB_MACIO)		+= macio-adb.o
+
+obj-$(CONFIG_THERM_PM72)	+= therm_pm72.o
+obj-$(CONFIG_THERM_WINDTUNNEL)	+= therm_windtunnel.o
+obj-$(CONFIG_THERM_ADT7467)	+= therm_adt7467.o

drivers/macintosh/therm_pm72.h

+#ifndef __THERM_PMAC_7_2_H__
+#define __THERM_PMAC_7_2_H__
+
+typedef unsigned short fu16;
+typedef int fs32;
+typedef short fs16;
+
+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 */
+	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 */
+
+/* Display a 16.16 fixed point value */
+#define FIX32TOPRINT(f)	((f) >> 16),((((f) & 0xffff) * 1000) >> 16)
+
+/*
+ * Maximum number of seconds to be in critical state (after a
+ * normal shutdown attempt). If the machine isn't down after
+ * this counter elapses, we force an immediate machine power
+ * off.
+ */
+#define MAX_CRITICAL_STATE			30
+static char * critical_overtemp_path = "/sbin/critical_overtemp";
+
+/*
+ * This option is "weird" :) Basically, if you define this to 1
+ * the control loop for the RPMs fans (not PWMs) will apply the
+ * correction factor obtained from the PID to the _actual_ RPM
+ * speed read from the FCU.
+ * If you define the below constant to 0, then it will be
+ * applied to the setpoint RPM speed, that is basically the
+ * speed we proviously "asked" for.
+ *
+ * I'm not sure which of these Apple's algorithm is supposed
+ * to use
+ */
+#define RPM_PID_USE_ACTUAL_SPEED		1
+
+/*
+ * i2c IDs. Currently, we hard code those and assume that
+ * the FCU is on U3 bus 1 while all sensors are on U3 bus
+ * 0. This appear to be safe enough for this first version
+ * of the driver, though I would accept any clean patch
+ * doing a better use of the device-tree without turning the
+ * while i2c registration mecanism into a racy mess
+ */
+#define FAN_CTRLER_ID		0x15e
+#define SUPPLY_MONITOR_ID      	0x58
+#define SUPPLY_MONITORB_ID     	0x5a
+#define DRIVES_DALLAS_ID	0x94
+#define BACKSIDE_MAX_ID		0x98
+
+/*
+ * Some MAX6690 & DS1775 register definitions
+ */
+#define MAX6690_INT_TEMP	0
+#define MAX6690_EXT_TEMP	1
+#define DS1775_TEMP		0
+
+/*
+ * Scaling factors for the AD7417 ADC converters (except
+ * for the CPU diode which is obtained from the EEPROM).
+ * Those values are obtained from the property list of
+ * the darwin driver
+ */
+#define ADC_12V_CURRENT_SCALE	0x0320	/* _AD2 */
+#define ADC_CPU_VOLTAGE_SCALE	0x00a0	/* _AD3 */
+#define ADC_CPU_CURRENT_SCALE	0x1f40	/* _AD4 */
+
+/*
+ * PID factors for the U3/Backside fan control loop
+ */
+#define BACKSIDE_FAN_PWM_ID		1
+#define BACKSIDE_PID_G_d		0x02800000
+#define BACKSIDE_PID_G_p		0x00500000
+#define BACKSIDE_PID_G_r		0x00000000
+#define BACKSIDE_PID_INPUT_TARGET	0x00410000
+#define BACKSIDE_PID_INTERVAL		5
+#define BACKSIDE_PID_OUTPUT_MAX		100
+#define BACKSIDE_PID_OUTPUT_MIN		20
+#define BACKSIDE_PID_HISTORY_SIZE	2
+
+struct backside_pid_state
+{
+	int			ticks;
+	struct i2c_client *	monitor;
+	s32		       	sample_history[BACKSIDE_PID_HISTORY_SIZE];
+	s32			error_history[BACKSIDE_PID_HISTORY_SIZE];
+	int			cur_sample;
+	s32			last_temp;
+	int			pwm;
+	int			first;
+};
+
+/*
+ * PID factors for the Drive Bay fan control loop
+ */
+#define DRIVES_FAN_RPM_ID      		2
+#define DRIVES_PID_G_d			0x01e00000
+#define DRIVES_PID_G_p			0x00500000
+#define DRIVES_PID_G_r			0x00000000
+#define DRIVES_PID_INPUT_TARGET		0x00280000
+#define DRIVES_PID_INTERVAL    		5
+#define DRIVES_PID_OUTPUT_MAX		4000
+#define DRIVES_PID_OUTPUT_MIN		300
+#define DRIVES_PID_HISTORY_SIZE		2
+
+struct drives_pid_state
+{
+	int			ticks;
+	struct i2c_client *	monitor;
+	s32	       		sample_history[BACKSIDE_PID_HISTORY_SIZE];
+	s32			error_history[BACKSIDE_PID_HISTORY_SIZE];
+	int			cur_sample;
+	s32			last_temp;
+	int			rpm;
+	int			first;
+};
+
+#define SLOTS_FAN_PWM_ID       		2
+#define	SLOTS_FAN_DEFAULT_PWM		50 /* Do better here ! */
+
+/*
+ * IDs in Darwin for the sensors & fans
+ *
+ * CPU A AD7417_TEMP	10	(CPU A ambient temperature)
+ * CPU A AD7417_AD1	11	(CPU A diode temperature)
+ * CPU A AD7417_AD2	12	(CPU A 12V current)
+ * CPU A AD7417_AD3	13	(CPU A voltage)
+ * CPU A AD7417_AD4	14	(CPU A current)
+ *
+ * CPU A FAKE POWER	48	(I_V_inputs: 13, 14)
+ *
+ * CPU B AD7417_TEMP	15	(CPU B ambient temperature)
+ * CPU B AD7417_AD1	16	(CPU B diode temperature)
+ * CPU B AD7417_AD2	17	(CPU B 12V current)
+ * CPU B AD7417_AD3	18	(CPU B voltage)
+ * CPU B AD7417_AD4	19	(CPU B current)
+ *
+ * CPU B FAKE POWER	49	(I_V_inputs: 18, 19)
+ */
+
+#define CPUA_INTAKE_FAN_RPM_ID		3
+#define CPUA_EXHAUST_FAN_RPM_ID		4
+#define CPUB_INTAKE_FAN_RPM_ID		5
+#define CPUB_EXHAUST_FAN_RPM_ID		6
+
+#define CPU_INTAKE_SCALE		0x0000f852
+#define CPU_TEMP_HISTORY_SIZE		2
+#define CPU_POWER_HISTORY_SIZE		10
+#define CPU_PID_INTERVAL		1
+#define CPU_MAX_OVERTEMP		30
+
+struct cpu_pid_state
+{
+	int			index;
+	struct i2c_client *	monitor;
+	struct mpu_data		mpu;
+	int			overtemp;
+	s32	       		temp_history[CPU_TEMP_HISTORY_SIZE];
+	int			cur_temp;
+	s32			power_history[CPU_POWER_HISTORY_SIZE];
+	s32			error_history[CPU_POWER_HISTORY_SIZE];
+	int			cur_power;
+	int			count_power;
+	int			rpm;
+	int			intake_rpm;
+	s32			voltage;
+	s32			current_a;
+	s32			last_temp;
+	int			first;
+};
+
+/*
+ * Driver state
+ */
+enum {
+	state_detached,
+	state_attaching,
+	state_attached,
+	state_detaching,
+};
+
+
+#endif /* __THERM_PMAC_7_2_H__ */