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730745a5c4
This is the first part of a rework of the PowerMac i2c code. It completely reworks the "low_i2c" layer. It is now more flexible, supports KeyWest, SMU and PMU i2c busses, and provides functions to match device nodes to i2c busses and adapters. This patch also extends & fix some bugs in the SMU driver related to i2c support and removes the clock spreading hacks from the pmac feature code rather than adapting them to the new API since they'll be replaced by the platform function code completely in patch 3/5 Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
235 lines
7.9 KiB
C
235 lines
7.9 KiB
C
/*
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* Definitions for talking to the PMU. The PMU is a microcontroller
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* which controls battery charging and system power on PowerBook 3400
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* and 2400 models as well as the RTC and various other things.
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*
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* Copyright (C) 1998 Paul Mackerras.
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*/
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#include <linux/config.h>
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#define PMU_DRIVER_VERSION 2
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/*
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* PMU commands
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*/
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#define PMU_POWER_CTRL0 0x10 /* control power of some devices */
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#define PMU_POWER_CTRL 0x11 /* control power of some devices */
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#define PMU_ADB_CMD 0x20 /* send ADB packet */
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#define PMU_ADB_POLL_OFF 0x21 /* disable ADB auto-poll */
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#define PMU_WRITE_NVRAM 0x33 /* write non-volatile RAM */
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#define PMU_READ_NVRAM 0x3b /* read non-volatile RAM */
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#define PMU_SET_RTC 0x30 /* set real-time clock */
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#define PMU_READ_RTC 0x38 /* read real-time clock */
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#define PMU_SET_VOLBUTTON 0x40 /* set volume up/down position */
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#define PMU_BACKLIGHT_BRIGHT 0x41 /* set backlight brightness */
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#define PMU_GET_VOLBUTTON 0x48 /* get volume up/down position */
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#define PMU_PCEJECT 0x4c /* eject PC-card from slot */
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#define PMU_BATTERY_STATE 0x6b /* report battery state etc. */
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#define PMU_SMART_BATTERY_STATE 0x6f /* report battery state (new way) */
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#define PMU_SET_INTR_MASK 0x70 /* set PMU interrupt mask */
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#define PMU_INT_ACK 0x78 /* read interrupt bits */
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#define PMU_SHUTDOWN 0x7e /* turn power off */
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#define PMU_CPU_SPEED 0x7d /* control CPU speed on some models */
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#define PMU_SLEEP 0x7f /* put CPU to sleep */
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#define PMU_POWER_EVENTS 0x8f /* Send power-event commands to PMU */
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#define PMU_I2C_CMD 0x9a /* I2C operations */
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#define PMU_RESET 0xd0 /* reset CPU */
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#define PMU_GET_BRIGHTBUTTON 0xd9 /* report brightness up/down pos */
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#define PMU_GET_COVER 0xdc /* report cover open/closed */
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#define PMU_SYSTEM_READY 0xdf /* tell PMU we are awake */
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#define PMU_GET_VERSION 0xea /* read the PMU version */
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/* Bits to use with the PMU_POWER_CTRL0 command */
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#define PMU_POW0_ON 0x80 /* OR this to power ON the device */
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#define PMU_POW0_OFF 0x00 /* leave bit 7 to 0 to power it OFF */
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#define PMU_POW0_HARD_DRIVE 0x04 /* Hard drive power (on wallstreet/lombard ?) */
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/* Bits to use with the PMU_POWER_CTRL command */
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#define PMU_POW_ON 0x80 /* OR this to power ON the device */
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#define PMU_POW_OFF 0x00 /* leave bit 7 to 0 to power it OFF */
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#define PMU_POW_BACKLIGHT 0x01 /* backlight power */
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#define PMU_POW_CHARGER 0x02 /* battery charger power */
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#define PMU_POW_IRLED 0x04 /* IR led power (on wallstreet) */
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#define PMU_POW_MEDIABAY 0x08 /* media bay power (wallstreet/lombard ?) */
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/* Bits in PMU interrupt and interrupt mask bytes */
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#define PMU_INT_PCEJECT 0x04 /* PC-card eject buttons */
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#define PMU_INT_SNDBRT 0x08 /* sound/brightness up/down buttons */
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#define PMU_INT_ADB 0x10 /* ADB autopoll or reply data */
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#define PMU_INT_BATTERY 0x20 /* Battery state change */
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#define PMU_INT_ENVIRONMENT 0x40 /* Environment interrupts */
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#define PMU_INT_TICK 0x80 /* 1-second tick interrupt */
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/* Other bits in PMU interrupt valid when PMU_INT_ADB is set */
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#define PMU_INT_ADB_AUTO 0x04 /* ADB autopoll, when PMU_INT_ADB */
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#define PMU_INT_WAITING_CHARGER 0x01 /* ??? */
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#define PMU_INT_AUTO_SRQ_POLL 0x02 /* ??? */
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/* Bits in the environement message (either obtained via PMU_GET_COVER,
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* or via PMU_INT_ENVIRONMENT on core99 */
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#define PMU_ENV_LID_CLOSED 0x01 /* The lid is closed */
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/* I2C related definitions */
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#define PMU_I2C_MODE_SIMPLE 0
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#define PMU_I2C_MODE_STDSUB 1
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#define PMU_I2C_MODE_COMBINED 2
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#define PMU_I2C_BUS_STATUS 0
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#define PMU_I2C_BUS_SYSCLK 1
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#define PMU_I2C_BUS_POWER 2
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#define PMU_I2C_STATUS_OK 0
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#define PMU_I2C_STATUS_DATAREAD 1
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#define PMU_I2C_STATUS_BUSY 0xfe
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/* Kind of PMU (model) */
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enum {
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PMU_UNKNOWN,
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PMU_OHARE_BASED, /* 2400, 3400, 3500 (old G3 powerbook) */
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PMU_HEATHROW_BASED, /* PowerBook G3 series */
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PMU_PADDINGTON_BASED, /* 1999 PowerBook G3 */
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PMU_KEYLARGO_BASED, /* Core99 motherboard (PMU99) */
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PMU_68K_V1, /* 68K PMU, version 1 */
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PMU_68K_V2, /* 68K PMU, version 2 */
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};
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/* PMU PMU_POWER_EVENTS commands */
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enum {
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PMU_PWR_GET_POWERUP_EVENTS = 0x00,
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PMU_PWR_SET_POWERUP_EVENTS = 0x01,
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PMU_PWR_CLR_POWERUP_EVENTS = 0x02,
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PMU_PWR_GET_WAKEUP_EVENTS = 0x03,
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PMU_PWR_SET_WAKEUP_EVENTS = 0x04,
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PMU_PWR_CLR_WAKEUP_EVENTS = 0x05,
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};
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/* Power events wakeup bits */
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enum {
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PMU_PWR_WAKEUP_KEY = 0x01, /* Wake on key press */
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PMU_PWR_WAKEUP_AC_INSERT = 0x02, /* Wake on AC adapter plug */
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PMU_PWR_WAKEUP_AC_CHANGE = 0x04,
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PMU_PWR_WAKEUP_LID_OPEN = 0x08,
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PMU_PWR_WAKEUP_RING = 0x10,
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};
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/*
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* Ioctl commands for the /dev/pmu device
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*/
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#include <linux/ioctl.h>
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/* no param */
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#define PMU_IOC_SLEEP _IO('B', 0)
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/* out param: u32* backlight value: 0 to 15 */
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#define PMU_IOC_GET_BACKLIGHT _IOR('B', 1, size_t)
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/* in param: u32 backlight value: 0 to 15 */
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#define PMU_IOC_SET_BACKLIGHT _IOW('B', 2, size_t)
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/* out param: u32* PMU model */
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#define PMU_IOC_GET_MODEL _IOR('B', 3, size_t)
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/* out param: u32* has_adb: 0 or 1 */
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#define PMU_IOC_HAS_ADB _IOR('B', 4, size_t)
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/* out param: u32* can_sleep: 0 or 1 */
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#define PMU_IOC_CAN_SLEEP _IOR('B', 5, size_t)
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/* no param, but historically was _IOR('B', 6, 0), meaning 4 bytes */
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#define PMU_IOC_GRAB_BACKLIGHT _IOR('B', 6, size_t)
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#ifdef __KERNEL__
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extern int find_via_pmu(void);
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extern int pmu_request(struct adb_request *req,
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void (*done)(struct adb_request *), int nbytes, ...);
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extern int pmu_queue_request(struct adb_request *req);
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extern void pmu_poll(void);
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extern void pmu_poll_adb(void); /* For use by xmon */
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extern void pmu_wait_complete(struct adb_request *req);
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/* For use before switching interrupts off for a long time;
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* warning: not stackable
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*/
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extern void pmu_suspend(void);
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extern void pmu_resume(void);
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extern void pmu_enable_irled(int on);
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extern void pmu_restart(void);
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extern void pmu_shutdown(void);
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extern void pmu_unlock(void);
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extern int pmu_present(void);
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extern int pmu_get_model(void);
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#ifdef CONFIG_PM
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/*
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* Stuff for putting the powerbook to sleep and waking it again.
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*
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*/
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#include <linux/list.h>
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struct pmu_sleep_notifier
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{
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int (*notifier_call)(struct pmu_sleep_notifier *self, int when);
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int priority;
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struct list_head list;
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};
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/* Code values for calling sleep/wakeup handlers
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*
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* Note: If a sleep request got cancelled, all drivers will get
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* the PBOOK_SLEEP_REJECT, even those who didn't get the PBOOK_SLEEP_REQUEST.
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*/
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#define PBOOK_SLEEP_REQUEST 1
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#define PBOOK_SLEEP_NOW 2
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#define PBOOK_SLEEP_REJECT 3
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#define PBOOK_WAKE 4
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/* Result codes returned by the notifiers */
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#define PBOOK_SLEEP_OK 0
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#define PBOOK_SLEEP_REFUSE -1
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/* priority levels in notifiers */
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#define SLEEP_LEVEL_VIDEO 100 /* Video driver (first wake) */
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#define SLEEP_LEVEL_MEDIABAY 90 /* Media bay driver */
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#define SLEEP_LEVEL_BLOCK 80 /* IDE, SCSI */
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#define SLEEP_LEVEL_NET 70 /* bmac, gmac */
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#define SLEEP_LEVEL_MISC 60 /* Anything else */
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#define SLEEP_LEVEL_USERLAND 55 /* Reserved for apm_emu */
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#define SLEEP_LEVEL_ADB 50 /* ADB (async) */
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#define SLEEP_LEVEL_SOUND 40 /* Sound driver (blocking) */
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/* special register notifier functions */
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int pmu_register_sleep_notifier(struct pmu_sleep_notifier* notifier);
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int pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* notifier);
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#endif /* CONFIG_PM */
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#define PMU_MAX_BATTERIES 2
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/* values for pmu_power_flags */
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#define PMU_PWR_AC_PRESENT 0x00000001
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/* values for pmu_battery_info.flags */
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#define PMU_BATT_PRESENT 0x00000001
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#define PMU_BATT_CHARGING 0x00000002
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#define PMU_BATT_TYPE_MASK 0x000000f0
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#define PMU_BATT_TYPE_SMART 0x00000010 /* Smart battery */
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#define PMU_BATT_TYPE_HOOPER 0x00000020 /* 3400/3500 */
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#define PMU_BATT_TYPE_COMET 0x00000030 /* 2400 */
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struct pmu_battery_info
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{
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unsigned int flags;
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unsigned int charge; /* current charge */
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unsigned int max_charge; /* maximum charge */
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signed int amperage; /* current, positive if charging */
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unsigned int voltage; /* voltage */
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unsigned int time_remaining; /* remaining time */
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};
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extern int pmu_battery_count;
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extern struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
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extern unsigned int pmu_power_flags;
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#endif /* __KERNEL__ */
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