xref: /openbmc/linux/include/uapi/linux/pmu.h (revision aefcb746)
1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2 /*
3  * Definitions for talking to the PMU.  The PMU is a microcontroller
4  * which controls battery charging and system power on PowerBook 3400
5  * and 2400 models as well as the RTC and various other things.
6  *
7  * Copyright (C) 1998 Paul Mackerras.
8  */
9 
10 #ifndef _UAPI_LINUX_PMU_H
11 #define _UAPI_LINUX_PMU_H
12 
13 #define PMU_DRIVER_VERSION	2
14 
15 /*
16  * PMU commands
17  */
18 #define PMU_POWER_CTRL0		0x10	/* control power of some devices */
19 #define PMU_POWER_CTRL		0x11	/* control power of some devices */
20 #define PMU_ADB_CMD		0x20	/* send ADB packet */
21 #define PMU_ADB_POLL_OFF	0x21	/* disable ADB auto-poll */
22 #define PMU_WRITE_XPRAM		0x32	/* write eXtended Parameter RAM */
23 #define PMU_WRITE_NVRAM		0x33	/* write non-volatile RAM */
24 #define PMU_READ_XPRAM		0x3a	/* read eXtended Parameter RAM */
25 #define PMU_READ_NVRAM		0x3b	/* read non-volatile RAM */
26 #define PMU_SET_RTC		0x30	/* set real-time clock */
27 #define PMU_READ_RTC		0x38	/* read real-time clock */
28 #define PMU_SET_VOLBUTTON	0x40	/* set volume up/down position */
29 #define PMU_BACKLIGHT_BRIGHT	0x41	/* set backlight brightness */
30 #define PMU_GET_VOLBUTTON	0x48	/* get volume up/down position */
31 #define PMU_PCEJECT		0x4c	/* eject PC-card from slot */
32 #define PMU_BATTERY_STATE	0x6b	/* report battery state etc. */
33 #define PMU_SMART_BATTERY_STATE	0x6f	/* report battery state (new way) */
34 #define PMU_SET_INTR_MASK	0x70	/* set PMU interrupt mask */
35 #define PMU_INT_ACK		0x78	/* read interrupt bits */
36 #define PMU_SHUTDOWN		0x7e	/* turn power off */
37 #define PMU_CPU_SPEED		0x7d	/* control CPU speed on some models */
38 #define PMU_SLEEP		0x7f	/* put CPU to sleep */
39 #define PMU_POWER_EVENTS	0x8f	/* Send power-event commands to PMU */
40 #define PMU_I2C_CMD		0x9a	/* I2C operations */
41 #define PMU_RESET		0xd0	/* reset CPU */
42 #define PMU_GET_BRIGHTBUTTON	0xd9	/* report brightness up/down pos */
43 #define PMU_GET_COVER		0xdc	/* report cover open/closed */
44 #define PMU_SYSTEM_READY	0xdf	/* tell PMU we are awake */
45 #define PMU_GET_VERSION		0xea	/* read the PMU version */
46 
47 /* Bits to use with the PMU_POWER_CTRL0 command */
48 #define PMU_POW0_ON		0x80	/* OR this to power ON the device */
49 #define PMU_POW0_OFF		0x00	/* leave bit 7 to 0 to power it OFF */
50 #define PMU_POW0_HARD_DRIVE	0x04	/* Hard drive power (on wallstreet/lombard ?) */
51 
52 /* Bits to use with the PMU_POWER_CTRL command */
53 #define PMU_POW_ON		0x80	/* OR this to power ON the device */
54 #define PMU_POW_OFF		0x00	/* leave bit 7 to 0 to power it OFF */
55 #define PMU_POW_BACKLIGHT	0x01	/* backlight power */
56 #define PMU_POW_CHARGER		0x02	/* battery charger power */
57 #define PMU_POW_IRLED		0x04	/* IR led power (on wallstreet) */
58 #define PMU_POW_MEDIABAY	0x08	/* media bay power (wallstreet/lombard ?) */
59 
60 /* Bits in PMU interrupt and interrupt mask bytes */
61 #define PMU_INT_PCEJECT		0x04	/* PC-card eject buttons */
62 #define PMU_INT_SNDBRT		0x08	/* sound/brightness up/down buttons */
63 #define PMU_INT_ADB		0x10	/* ADB autopoll or reply data */
64 #define PMU_INT_BATTERY		0x20	/* Battery state change */
65 #define PMU_INT_ENVIRONMENT	0x40	/* Environment interrupts */
66 #define PMU_INT_TICK		0x80	/* 1-second tick interrupt */
67 
68 /* Other bits in PMU interrupt valid when PMU_INT_ADB is set */
69 #define PMU_INT_ADB_AUTO	0x04	/* ADB autopoll, when PMU_INT_ADB */
70 #define PMU_INT_WAITING_CHARGER	0x01	/* ??? */
71 #define PMU_INT_AUTO_SRQ_POLL	0x02	/* ??? */
72 
73 /* Bits in the environement message (either obtained via PMU_GET_COVER,
74  * or via PMU_INT_ENVIRONMENT on core99 */
75 #define PMU_ENV_LID_CLOSED	0x01	/* The lid is closed */
76 
77 /* I2C related definitions */
78 #define PMU_I2C_MODE_SIMPLE	0
79 #define PMU_I2C_MODE_STDSUB	1
80 #define PMU_I2C_MODE_COMBINED	2
81 
82 #define PMU_I2C_BUS_STATUS	0
83 #define PMU_I2C_BUS_SYSCLK	1
84 #define PMU_I2C_BUS_POWER	2
85 
86 #define PMU_I2C_STATUS_OK	0
87 #define PMU_I2C_STATUS_DATAREAD	1
88 #define PMU_I2C_STATUS_BUSY	0xfe
89 
90 
91 /* Kind of PMU (model) */
92 enum {
93 	PMU_UNKNOWN,
94 	PMU_OHARE_BASED,	/* 2400, 3400, 3500 (old G3 powerbook) */
95 	PMU_HEATHROW_BASED,	/* PowerBook G3 series */
96 	PMU_PADDINGTON_BASED,	/* 1999 PowerBook G3 */
97 	PMU_KEYLARGO_BASED,	/* Core99 motherboard (PMU99) */
98 	PMU_68K_V1,		/* Unused/deprecated */
99 	PMU_68K_V2,		/* Unused/deprecated */
100 };
101 
102 /* PMU PMU_POWER_EVENTS commands */
103 enum {
104 	PMU_PWR_GET_POWERUP_EVENTS	= 0x00,
105 	PMU_PWR_SET_POWERUP_EVENTS	= 0x01,
106 	PMU_PWR_CLR_POWERUP_EVENTS	= 0x02,
107 	PMU_PWR_GET_WAKEUP_EVENTS	= 0x03,
108 	PMU_PWR_SET_WAKEUP_EVENTS	= 0x04,
109 	PMU_PWR_CLR_WAKEUP_EVENTS	= 0x05,
110 };
111 
112 /* Power events wakeup bits */
113 enum {
114 	PMU_PWR_WAKEUP_KEY		= 0x01,	/* Wake on key press */
115 	PMU_PWR_WAKEUP_AC_INSERT	= 0x02, /* Wake on AC adapter plug */
116 	PMU_PWR_WAKEUP_AC_CHANGE	= 0x04,
117 	PMU_PWR_WAKEUP_LID_OPEN		= 0x08,
118 	PMU_PWR_WAKEUP_RING		= 0x10,
119 };
120 
121 /*
122  * Ioctl commands for the /dev/pmu device
123  */
124 #include <linux/ioctl.h>
125 
126 /* no param */
127 #define PMU_IOC_SLEEP		_IO('B', 0)
128 /* out param: u32*	backlight value: 0 to 15 */
129 #define PMU_IOC_GET_BACKLIGHT	_IOR('B', 1, size_t)
130 /* in param: u32	backlight value: 0 to 15 */
131 #define PMU_IOC_SET_BACKLIGHT	_IOW('B', 2, size_t)
132 /* out param: u32*	PMU model */
133 #define PMU_IOC_GET_MODEL	_IOR('B', 3, size_t)
134 /* out param: u32*	has_adb: 0 or 1 */
135 #define PMU_IOC_HAS_ADB		_IOR('B', 4, size_t)
136 /* out param: u32*	can_sleep: 0 or 1 */
137 #define PMU_IOC_CAN_SLEEP	_IOR('B', 5, size_t)
138 /* no param, but historically was _IOR('B', 6, 0), meaning 4 bytes */
139 #define PMU_IOC_GRAB_BACKLIGHT	_IOR('B', 6, size_t)
140 
141 
142 #endif /* _UAPI_LINUX_PMU_H */
143