via-pmu.c 75.2 KB
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/*
 * Device driver for the via-pmu on Apple Powermacs.
 *
 * The VIA (versatile interface adapter) interfaces to the PMU,
 * a 6805 microprocessor core whose primary function is to control
 * battery charging and system power on the PowerBook 3400 and 2400.
 * The PMU also controls the ADB (Apple Desktop Bus) which connects
 * to the keyboard and mouse, as well as the non-volatile RAM
 * and the RTC (real time clock) chip.
 *
 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
 *
 * THIS DRIVER IS BECOMING A TOTAL MESS !
 *  - Cleanup atomically disabling reply to PMU events after
 *    a sleep or a freq. switch
 *  - Move sleep code out of here to pmac_pm, merge into new
 *    common PM infrastructure
 *  - Move backlight code out as well
 *  - Save/Restore PCI space properly
 *
 */
#include <stdarg.h>
#include <linux/config.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/miscdevice.h>
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/adb.h>
#include <linux/pmu.h>
#include <linux/cuda.h>
#include <linux/smp_lock.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/sysdev.h>
#include <linux/suspend.h>
#include <linux/syscalls.h>
#include <linux/cpu.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/sections.h>
#include <asm/irq.h>
#include <asm/pmac_feature.h>
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/cputable.h>
#include <asm/time.h>
#ifdef CONFIG_PMAC_BACKLIGHT
#include <asm/backlight.h>
#endif

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#ifdef CONFIG_PPC32
#include <asm/open_pic.h>
#endif

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/* Some compile options */
#undef SUSPEND_USES_PMU
#define DEBUG_SLEEP
#undef HACKED_PCI_SAVE

/* Misc minor number allocated for /dev/pmu */
#define PMU_MINOR		154

/* How many iterations between battery polls */
#define BATTERY_POLLING_COUNT	2

static volatile unsigned char __iomem *via;

/* VIA registers - spaced 0x200 bytes apart */
#define RS		0x200		/* skip between registers */
#define B		0		/* B-side data */
#define A		RS		/* A-side data */
#define DIRB		(2*RS)		/* B-side direction (1=output) */
#define DIRA		(3*RS)		/* A-side direction (1=output) */
#define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
#define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
#define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
#define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
#define T2CL		(8*RS)		/* Timer 2 ctr/latch (low 8 bits) */
#define T2CH		(9*RS)		/* Timer 2 counter (high 8 bits) */
#define SR		(10*RS)		/* Shift register */
#define ACR		(11*RS)		/* Auxiliary control register */
#define PCR		(12*RS)		/* Peripheral control register */
#define IFR		(13*RS)		/* Interrupt flag register */
#define IER		(14*RS)		/* Interrupt enable register */
#define ANH		(15*RS)		/* A-side data, no handshake */

/* Bits in B data register: both active low */
#define TACK		0x08		/* Transfer acknowledge (input) */
#define TREQ		0x10		/* Transfer request (output) */

/* Bits in ACR */
#define SR_CTRL		0x1c		/* Shift register control bits */
#define SR_EXT		0x0c		/* Shift on external clock */
#define SR_OUT		0x10		/* Shift out if 1 */

/* Bits in IFR and IER */
#define IER_SET		0x80		/* set bits in IER */
#define IER_CLR		0		/* clear bits in IER */
#define SR_INT		0x04		/* Shift register full/empty */
#define CB2_INT		0x08
#define CB1_INT		0x10		/* transition on CB1 input */

static volatile enum pmu_state {
	idle,
	sending,
	intack,
	reading,
	reading_intr,
	locked,
} pmu_state;

static volatile enum int_data_state {
	int_data_empty,
	int_data_fill,
	int_data_ready,
	int_data_flush
} int_data_state[2] = { int_data_empty, int_data_empty };

static struct adb_request *current_req;
static struct adb_request *last_req;
static struct adb_request *req_awaiting_reply;
static unsigned char interrupt_data[2][32];
static int interrupt_data_len[2];
static int int_data_last;
static unsigned char *reply_ptr;
static int data_index;
static int data_len;
static volatile int adb_int_pending;
static volatile int disable_poll;
static struct adb_request bright_req_1, bright_req_2;
static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
static int pmu_fully_inited = 0;
static int pmu_has_adb;
static unsigned char __iomem *gpio_reg = NULL;
static int gpio_irq = -1;
static int gpio_irq_enabled = -1;
static volatile int pmu_suspended = 0;
static spinlock_t pmu_lock;
static u8 pmu_intr_mask;
static int pmu_version;
static int drop_interrupts;
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#ifdef CONFIG_PM
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static int option_lid_wakeup = 1;
static int sleep_in_progress;
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#endif /* CONFIG_PM */
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static unsigned long async_req_locks;
static unsigned int pmu_irq_stats[11];

static struct proc_dir_entry *proc_pmu_root;
static struct proc_dir_entry *proc_pmu_info;
static struct proc_dir_entry *proc_pmu_irqstats;
static struct proc_dir_entry *proc_pmu_options;
static int option_server_mode;

int pmu_battery_count;
int pmu_cur_battery;
unsigned int pmu_power_flags;
struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
static int query_batt_timer = BATTERY_POLLING_COUNT;
static struct adb_request batt_req;
static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];

#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
extern int disable_kernel_backlight;
#endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */

int __fake_sleep;
int asleep;
struct notifier_block *sleep_notifier_list;

#ifdef CONFIG_ADB
static int adb_dev_map = 0;
static int pmu_adb_flags;

static int pmu_probe(void);
static int pmu_init(void);
static int pmu_send_request(struct adb_request *req, int sync);
static int pmu_adb_autopoll(int devs);
static int pmu_adb_reset_bus(void);
#endif /* CONFIG_ADB */

static int init_pmu(void);
static int pmu_queue_request(struct adb_request *req);
static void pmu_start(void);
static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
static int proc_get_info(char *page, char **start, off_t off,
			  int count, int *eof, void *data);
static int proc_get_irqstats(char *page, char **start, off_t off,
			  int count, int *eof, void *data);
#ifdef CONFIG_PMAC_BACKLIGHT
static int pmu_set_backlight_level(int level, void* data);
static int pmu_set_backlight_enable(int on, int level, void* data);
#endif /* CONFIG_PMAC_BACKLIGHT */
static void pmu_pass_intr(unsigned char *data, int len);
static int proc_get_batt(char *page, char **start, off_t off,
			int count, int *eof, void *data);
static int proc_read_options(char *page, char **start, off_t off,
			int count, int *eof, void *data);
static int proc_write_options(struct file *file, const char __user *buffer,
			unsigned long count, void *data);

#ifdef CONFIG_ADB
struct adb_driver via_pmu_driver = {
	"PMU",
	pmu_probe,
	pmu_init,
	pmu_send_request,
	pmu_adb_autopoll,
	pmu_poll_adb,
	pmu_adb_reset_bus
};
#endif /* CONFIG_ADB */

extern void low_sleep_handler(void);
extern void enable_kernel_altivec(void);
extern void enable_kernel_fp(void);

#ifdef DEBUG_SLEEP
int pmu_polled_request(struct adb_request *req);
int pmu_wink(struct adb_request *req);
#endif

/*
 * This table indicates for each PMU opcode:
 * - the number of data bytes to be sent with the command, or -1
 *   if a length byte should be sent,
 * - the number of response bytes which the PMU will return, or
 *   -1 if it will send a length byte.
 */
static const s8 pmu_data_len[256][2] __openfirmwaredata = {
/*	   0	   1	   2	   3	   4	   5	   6	   7  */
/*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
/*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
/*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
/*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
/*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
/*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
/*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
/*60*/	{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*68*/	{ 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
/*70*/	{ 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*78*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
/*80*/	{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*88*/	{ 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*90*/	{ 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*98*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*a0*/	{ 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
/*a8*/	{ 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*b0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*b8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*c0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*c8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*d0*/	{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*d8*/	{ 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
/*e0*/	{-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
/*e8*/	{ 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
/*f0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*f8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
};

static char *pbook_type[] = {
	"Unknown PowerBook",
	"PowerBook 2400/3400/3500(G3)",
	"PowerBook G3 Series",
	"1999 PowerBook G3",
	"Core99"
};

#ifdef CONFIG_PMAC_BACKLIGHT
static struct backlight_controller pmu_backlight_controller = {
	pmu_set_backlight_enable,
	pmu_set_backlight_level
};
#endif /* CONFIG_PMAC_BACKLIGHT */

int __openfirmware
find_via_pmu(void)
{
	if (via != 0)
		return 1;
	vias = find_devices("via-pmu");
	if (vias == 0)
		return 0;
	if (vias->next != 0)
		printk(KERN_WARNING "Warning: only using 1st via-pmu\n");

	if (vias->n_addrs < 1 || vias->n_intrs < 1) {
		printk(KERN_ERR "via-pmu: %d addresses, %d interrupts!\n",
		       vias->n_addrs, vias->n_intrs);
		if (vias->n_addrs < 1 || vias->n_intrs < 1)
			return 0;
	}

	spin_lock_init(&pmu_lock);

	pmu_has_adb = 1;

	pmu_intr_mask =	PMU_INT_PCEJECT |
			PMU_INT_SNDBRT |
			PMU_INT_ADB |
			PMU_INT_TICK;
	
	if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
	    || device_is_compatible(vias->parent, "ohare")))
		pmu_kind = PMU_OHARE_BASED;
	else if (device_is_compatible(vias->parent, "paddington"))
		pmu_kind = PMU_PADDINGTON_BASED;
	else if (device_is_compatible(vias->parent, "heathrow"))
		pmu_kind = PMU_HEATHROW_BASED;
	else if (device_is_compatible(vias->parent, "Keylargo")
		 || device_is_compatible(vias->parent, "K2-Keylargo")) {
		struct device_node *gpio, *gpiop;

		pmu_kind = PMU_KEYLARGO_BASED;
		pmu_has_adb = (find_type_devices("adb") != NULL);
		pmu_intr_mask =	PMU_INT_PCEJECT |
				PMU_INT_SNDBRT |
				PMU_INT_ADB |
				PMU_INT_TICK |
				PMU_INT_ENVIRONMENT;
		
		gpiop = find_devices("gpio");
		if (gpiop && gpiop->n_addrs) {
			gpio_reg = ioremap(gpiop->addrs->address, 0x10);
			gpio = find_devices("extint-gpio1");
			if (gpio == NULL)
				gpio = find_devices("pmu-interrupt");
			if (gpio && gpio->parent == gpiop && gpio->n_intrs)
				gpio_irq = gpio->intrs[0].line;
		}
	} else
		pmu_kind = PMU_UNKNOWN;

	via = ioremap(vias->addrs->address, 0x2000);
	
	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
	out_8(&via[IFR], 0x7f);			/* clear IFR */

	pmu_state = idle;

	if (!init_pmu()) {
		via = NULL;
		return 0;
	}

	printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n",
	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
	       
	sys_ctrler = SYS_CTRLER_PMU;
	
	return 1;
}

#ifdef CONFIG_ADB
static int __openfirmware
pmu_probe(void)
{
	return vias == NULL? -ENODEV: 0;
}

static int __init
pmu_init(void)
{
	if (vias == NULL)
		return -ENODEV;
	return 0;
}
#endif /* CONFIG_ADB */

/*
 * We can't wait until pmu_init gets called, that happens too late.
 * It happens after IDE and SCSI initialization, which can take a few
 * seconds, and by that time the PMU could have given up on us and
 * turned us off.
 * Thus this is called with arch_initcall rather than device_initcall.
 */
static int __init via_pmu_start(void)
{
	if (vias == NULL)
		return -ENODEV;

	bright_req_1.complete = 1;
	bright_req_2.complete = 1;
	batt_req.complete = 1;

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#ifdef CONFIG_PPC32
	if (pmu_kind == PMU_KEYLARGO_BASED)
		openpic_set_irq_priority(vias->intrs[0].line,
					 OPENPIC_PRIORITY_DEFAULT + 1);
#endif

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	if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
			(void *)0)) {
		printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
		       vias->intrs[0].line);
		return -EAGAIN;
	}

	if (pmu_kind == PMU_KEYLARGO_BASED && gpio_irq != -1) {
		if (request_irq(gpio_irq, gpio1_interrupt, 0, "GPIO1 ADB", (void *)0))
			printk(KERN_ERR "pmu: can't get irq %d (GPIO1)\n", gpio_irq);
		gpio_irq_enabled = 1;
	}

	/* Enable interrupts */
	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);

	pmu_fully_inited = 1;

	/* Make sure PMU settle down before continuing. This is _very_ important
	 * since the IDE probe may shut interrupts down for quite a bit of time. If
	 * a PMU communication is pending while this happens, the PMU may timeout
	 * Not that on Core99 machines, the PMU keeps sending us environement
	 * messages, we should find a way to either fix IDE or make it call
	 * pmu_suspend() before masking interrupts. This can also happens while
	 * scolling with some fbdevs.
	 */
	do {
		pmu_poll();
	} while (pmu_state != idle);

	return 0;
}

arch_initcall(via_pmu_start);

/*
 * This has to be done after pci_init, which is a subsys_initcall.
 */
static int __init via_pmu_dev_init(void)
{
	if (vias == NULL)
		return -ENODEV;

#ifndef CONFIG_PPC64
	request_OF_resource(vias, 0, NULL);
#endif
#ifdef CONFIG_PMAC_BACKLIGHT
	/* Enable backlight */
	register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
#endif /* CONFIG_PMAC_BACKLIGHT */

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#ifdef CONFIG_PPC32
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  	if (machine_is_compatible("AAPL,3400/2400") ||
  		machine_is_compatible("AAPL,3500")) {
		int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
			NULL, PMAC_MB_INFO_MODEL, 0);
		pmu_battery_count = 1;
		if (mb == PMAC_TYPE_COMET)
			pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
		else
			pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
	} else if (machine_is_compatible("AAPL,PowerBook1998") ||
		machine_is_compatible("PowerBook1,1")) {
		pmu_battery_count = 2;
		pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
		pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
	} else {
		struct device_node* prim = find_devices("power-mgt");
		u32 *prim_info = NULL;
		if (prim)
			prim_info = (u32 *)get_property(prim, "prim-info", NULL);
		if (prim_info) {
			/* Other stuffs here yet unknown */
			pmu_battery_count = (prim_info[6] >> 16) & 0xff;
			pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
			if (pmu_battery_count > 1)
				pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
		}
	}
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#endif /* CONFIG_PPC32 */

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	/* Create /proc/pmu */
	proc_pmu_root = proc_mkdir("pmu", NULL);
	if (proc_pmu_root) {
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		long i;
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		for (i=0; i<pmu_battery_count; i++) {
			char title[16];
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			sprintf(title, "battery_%ld", i);
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			proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
						proc_get_batt, (void *)i);
		}

		proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
					proc_get_info, NULL);
		proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
					proc_get_irqstats, NULL);
		proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
		if (proc_pmu_options) {
			proc_pmu_options->nlink = 1;
			proc_pmu_options->read_proc = proc_read_options;
			proc_pmu_options->write_proc = proc_write_options;
		}
	}
	return 0;
}

device_initcall(via_pmu_dev_init);

static int __openfirmware
init_pmu(void)
{
	int timeout;
	struct adb_request req;

	out_8(&via[B], via[B] | TREQ);			/* negate TREQ */
	out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);	/* TACK in, TREQ out */

	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	timeout =  100000;
	while (!req.complete) {
		if (--timeout < 0) {
			printk(KERN_ERR "init_pmu: no response from PMU\n");
			return 0;
		}
		udelay(10);
		pmu_poll();
	}

	/* ack all pending interrupts */
	timeout = 100000;
	interrupt_data[0][0] = 1;
	while (interrupt_data[0][0] || pmu_state != idle) {
		if (--timeout < 0) {
			printk(KERN_ERR "init_pmu: timed out acking intrs\n");
			return 0;
		}
		if (pmu_state == idle)
			adb_int_pending = 1;
		via_pmu_interrupt(0, NULL, NULL);
		udelay(10);
	}

	/* Tell PMU we are ready.  */
	if (pmu_kind == PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
		while (!req.complete)
			pmu_poll();
	}

	/* Read PMU version */
	pmu_request(&req, NULL, 1, PMU_GET_VERSION);
	pmu_wait_complete(&req);
	if (req.reply_len > 0)
		pmu_version = req.reply[0];
	
	/* Read server mode setting */
	if (pmu_kind == PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
			    PMU_PWR_GET_POWERUP_EVENTS);
		pmu_wait_complete(&req);
		if (req.reply_len == 2) {
			if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
				option_server_mode = 1;
			printk(KERN_INFO "via-pmu: Server Mode is %s\n",
			       option_server_mode ? "enabled" : "disabled");
		}
	}
	return 1;
}

int
pmu_get_model(void)
{
	return pmu_kind;
}

#ifndef CONFIG_PPC64
static inline void wakeup_decrementer(void)
{
	set_dec(tb_ticks_per_jiffy);
	/* No currently-supported powerbook has a 601,
	 * so use get_tbl, not native
	 */
	last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
}
#endif

static void pmu_set_server_mode(int server_mode)
{
	struct adb_request req;

	if (pmu_kind != PMU_KEYLARGO_BASED)
		return;

	option_server_mode = server_mode;
	pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
	pmu_wait_complete(&req);
	if (req.reply_len < 2)
		return;
	if (server_mode)
		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
			    PMU_PWR_SET_POWERUP_EVENTS,
			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
	else
		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
			    PMU_PWR_CLR_POWERUP_EVENTS,
			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
	pmu_wait_complete(&req);
}

/* This new version of the code for 2400/3400/3500 powerbooks
 * is inspired from the implementation in gkrellm-pmu
 */
static void __pmac
done_battery_state_ohare(struct adb_request* req)
{
	/* format:
	 *  [0]    :  flags
	 *    0x01 :  AC indicator
	 *    0x02 :  charging
	 *    0x04 :  battery exist
	 *    0x08 :  
	 *    0x10 :  
	 *    0x20 :  full charged
	 *    0x40 :  pcharge reset
	 *    0x80 :  battery exist
	 *
	 *  [1][2] :  battery voltage
	 *  [3]    :  CPU temperature
	 *  [4]    :  battery temperature
	 *  [5]    :  current
	 *  [6][7] :  pcharge
	 *              --tkoba
	 */
	unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
	long pcharge, charge, vb, vmax, lmax;
	long vmax_charging, vmax_charged;
	long amperage, voltage, time, max;
	int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
			NULL, PMAC_MB_INFO_MODEL, 0);

	if (req->reply[0] & 0x01)
		pmu_power_flags |= PMU_PWR_AC_PRESENT;
	else
		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
	
	if (mb == PMAC_TYPE_COMET) {
		vmax_charged = 189;
		vmax_charging = 213;
		lmax = 6500;
	} else {
		vmax_charged = 330;
		vmax_charging = 330;
		lmax = 6500;
	}
	vmax = vmax_charged;

	/* If battery installed */
	if (req->reply[0] & 0x04) {
		bat_flags |= PMU_BATT_PRESENT;
		if (req->reply[0] & 0x02)
			bat_flags |= PMU_BATT_CHARGING;
		vb = (req->reply[1] << 8) | req->reply[2];
		voltage = (vb * 265 + 72665) / 10;
		amperage = req->reply[5];
		if ((req->reply[0] & 0x01) == 0) {
			if (amperage > 200)
				vb += ((amperage - 200) * 15)/100;
		} else if (req->reply[0] & 0x02) {
			vb = (vb * 97) / 100;
			vmax = vmax_charging;
		}
		charge = (100 * vb) / vmax;
		if (req->reply[0] & 0x40) {
			pcharge = (req->reply[6] << 8) + req->reply[7];
			if (pcharge > lmax)
				pcharge = lmax;
			pcharge *= 100;
			pcharge = 100 - pcharge / lmax;
			if (pcharge < charge)
				charge = pcharge;
		}
		if (amperage > 0)
			time = (charge * 16440) / amperage;
		else
			time = 0;
		max = 100;
		amperage = -amperage;
	} else
		charge = max = amperage = voltage = time = 0;

	pmu_batteries[pmu_cur_battery].flags = bat_flags;
	pmu_batteries[pmu_cur_battery].charge = charge;
	pmu_batteries[pmu_cur_battery].max_charge = max;
	pmu_batteries[pmu_cur_battery].amperage = amperage;
	pmu_batteries[pmu_cur_battery].voltage = voltage;
	pmu_batteries[pmu_cur_battery].time_remaining = time;

	clear_bit(0, &async_req_locks);
}

static void __pmac
done_battery_state_smart(struct adb_request* req)
{
	/* format:
	 *  [0] : format of this structure (known: 3,4,5)
	 *  [1] : flags
	 *  
	 *  format 3 & 4:
	 *  
	 *  [2] : charge
	 *  [3] : max charge
	 *  [4] : current
	 *  [5] : voltage
	 *  
	 *  format 5:
	 *  
	 *  [2][3] : charge
	 *  [4][5] : max charge
	 *  [6][7] : current
	 *  [8][9] : voltage
	 */
	 
	unsigned int bat_flags = PMU_BATT_TYPE_SMART;
	int amperage;
	unsigned int capa, max, voltage;
	
	if (req->reply[1] & 0x01)
		pmu_power_flags |= PMU_PWR_AC_PRESENT;
	else
		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;


	capa = max = amperage = voltage = 0;
	
	if (req->reply[1] & 0x04) {
		bat_flags |= PMU_BATT_PRESENT;
		switch(req->reply[0]) {
			case 3:
			case 4: capa = req->reply[2];
				max = req->reply[3];
				amperage = *((signed char *)&req->reply[4]);
				voltage = req->reply[5];
				break;
			case 5: capa = (req->reply[2] << 8) | req->reply[3];
				max = (req->reply[4] << 8) | req->reply[5];
				amperage = *((signed short *)&req->reply[6]);
				voltage = (req->reply[8] << 8) | req->reply[9];
				break;
			default:
				printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
					req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
				break;
		}
	}

	if ((req->reply[1] & 0x01) && (amperage > 0))
		bat_flags |= PMU_BATT_CHARGING;

	pmu_batteries[pmu_cur_battery].flags = bat_flags;
	pmu_batteries[pmu_cur_battery].charge = capa;
	pmu_batteries[pmu_cur_battery].max_charge = max;
	pmu_batteries[pmu_cur_battery].amperage = amperage;
	pmu_batteries[pmu_cur_battery].voltage = voltage;
	if (amperage) {
		if ((req->reply[1] & 0x01) && (amperage > 0))
			pmu_batteries[pmu_cur_battery].time_remaining
				= ((max-capa) * 3600) / amperage;
		else
			pmu_batteries[pmu_cur_battery].time_remaining
				= (capa * 3600) / (-amperage);
	} else
		pmu_batteries[pmu_cur_battery].time_remaining = 0;

	pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;

	clear_bit(0, &async_req_locks);
}

static void __pmac
query_battery_state(void)
{
	if (test_and_set_bit(0, &async_req_locks))
		return;
	if (pmu_kind == PMU_OHARE_BASED)
		pmu_request(&batt_req, done_battery_state_ohare,
			1, PMU_BATTERY_STATE);
	else
		pmu_request(&batt_req, done_battery_state_smart,
			2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
}

static int __pmac
proc_get_info(char *page, char **start, off_t off,
		int count, int *eof, void *data)
{
	char* p = page;

	p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
	p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
	p += sprintf(p, "AC Power               : %d\n",
		((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
	p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);

	return p - page;
}

static int __pmac
proc_get_irqstats(char *page, char **start, off_t off,
		  int count, int *eof, void *data)
{
	int i;
	char* p = page;
	static const char *irq_names[] = {
		"Total CB1 triggered events",
		"Total GPIO1 triggered events",
		"PC-Card eject button",
		"Sound/Brightness button",
		"ADB message",
		"Battery state change",
		"Environment interrupt",
		"Tick timer",
		"Ghost interrupt (zero len)",
		"Empty interrupt (empty mask)",
		"Max irqs in a row"
        };

	for (i=0; i<11; i++) {
		p += sprintf(p, " %2u: %10u (%s)\n",
			     i, pmu_irq_stats[i], irq_names[i]);
	}
	return p - page;
}

static int __pmac
proc_get_batt(char *page, char **start, off_t off,
		int count, int *eof, void *data)
{
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	long batnum = (long)data;
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	char *p = page;
	
	p += sprintf(p, "\n");
	p += sprintf(p, "flags      : %08x\n",
		pmu_batteries[batnum].flags);
	p += sprintf(p, "charge     : %d\n",
		pmu_batteries[batnum].charge);
	p += sprintf(p, "max_charge : %d\n",
		pmu_batteries[batnum].max_charge);
	p += sprintf(p, "current    : %d\n",
		pmu_batteries[batnum].amperage);
	p += sprintf(p, "voltage    : %d\n",
		pmu_batteries[batnum].voltage);
	p += sprintf(p, "time rem.  : %d\n",
		pmu_batteries[batnum].time_remaining);

	return p - page;
}

static int __pmac
proc_read_options(char *page, char **start, off_t off,
			int count, int *eof, void *data)
{
	char *p = page;

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#ifdef CONFIG_PM
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	if (pmu_kind == PMU_KEYLARGO_BASED &&
	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
		p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
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#endif
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	if (pmu_kind == PMU_KEYLARGO_BASED)
		p += sprintf(p, "server_mode=%d\n", option_server_mode);

	return p - page;
}
			
static int __pmac
proc_write_options(struct file *file, const char __user *buffer,
			unsigned long count, void *data)
{
	char tmp[33];
	char *label, *val;
	unsigned long fcount = count;
	
	if (!count)
		return -EINVAL;
	if (count > 32)
		count = 32;
	if (copy_from_user(tmp, buffer, count))
		return -EFAULT;
	tmp[count] = 0;

	label = tmp;
	while(*label == ' ')
		label++;
	val = label;
	while(*val && (*val != '=')) {
		if (*val == ' ')
			*val = 0;
		val++;
	}
	if ((*val) == 0)
		return -EINVAL;
	*(val++) = 0;
	while(*val == ' ')
		val++;
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#ifdef CONFIG_PM
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	if (pmu_kind == PMU_KEYLARGO_BASED &&
	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
		if (!strcmp(label, "lid_wakeup"))
			option_lid_wakeup = ((*val) == '1');
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#endif
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	if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
		int new_value;
		new_value = ((*val) == '1');
		if (new_value != option_server_mode)
			pmu_set_server_mode(new_value);
	}
	return fcount;
}

#ifdef CONFIG_ADB
/* Send an ADB command */
static int __pmac
pmu_send_request(struct adb_request *req, int sync)
{
	int i, ret;

	if ((vias == NULL) || (!pmu_fully_inited)) {
		req->complete = 1;
		return -ENXIO;
	}

	ret = -EINVAL;

	switch (req->data[0]) {
	case PMU_PACKET:
		for (i = 0; i < req->nbytes - 1; ++i)
			req->data[i] = req->data[i+1];
		--req->nbytes;
		if (pmu_data_len[req->data[0]][1] != 0) {
			req->reply[0] = ADB_RET_OK;
			req->reply_len = 1;
		} else
			req->reply_len = 0;
		ret = pmu_queue_request(req);
		break;
	case CUDA_PACKET:
		switch (req->data[1]) {
		case CUDA_GET_TIME:
			if (req->nbytes != 2)
				break;
			req->data[0] = PMU_READ_RTC;
			req->nbytes = 1;
			req->reply_len = 3;
			req->reply[0] = CUDA_PACKET;
			req->reply[1] = 0;
			req->reply[2] = CUDA_GET_TIME;
			ret = pmu_queue_request(req);
			break;
		case CUDA_SET_TIME:
			if (req->nbytes != 6)
				break;
			req->data[0] = PMU_SET_RTC;
			req->nbytes = 5;
			for (i = 1; i <= 4; ++i)
				req->data[i] = req->data[i+1];
			req->reply_len = 3;
			req->reply[0] = CUDA_PACKET;
			req->reply[1] = 0;
			req->reply[2] = CUDA_SET_TIME;
			ret = pmu_queue_request(req);
			break;
		}
		break;
	case ADB_PACKET:
	    	if (!pmu_has_adb)
    			return -ENXIO;
		for (i = req->nbytes - 1; i > 1; --i)
			req->data[i+2] = req->data[i];
		req->data[3] = req->nbytes - 2;
		req->data[2] = pmu_adb_flags;
		/*req->data[1] = req->data[1];*/
		req->data[0] = PMU_ADB_CMD;
		req->nbytes += 2;
		req->reply_expected = 1;
		req->reply_len = 0;
		ret = pmu_queue_request(req);
		break;
	}
	if (ret) {
		req->complete = 1;
		return ret;
	}

	if (sync)
		while (!req->complete)
			pmu_poll();

	return 0;
}

/* Enable/disable autopolling */
static int __pmac
pmu_adb_autopoll(int devs)
{
	struct adb_request req;

	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
		return -ENXIO;

	if (devs) {
		adb_dev_map = devs;
		pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
			    adb_dev_map >> 8, adb_dev_map);
		pmu_adb_flags = 2;
	} else {
		pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
		pmu_adb_flags = 0;
	}
	while (!req.complete)
		pmu_poll();
	return 0;
}

/* Reset the ADB bus */
static int __pmac
pmu_adb_reset_bus(void)
{
	struct adb_request req;
	int save_autopoll = adb_dev_map;

	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
		return -ENXIO;

	/* anyone got a better idea?? */
	pmu_adb_autopoll(0);

	req.nbytes = 5;
	req.done = NULL;
	req.data[0] = PMU_ADB_CMD;
	req.data[1] = 0;
	req.data[2] = ADB_BUSRESET;
	req.data[3] = 0;
	req.data[4] = 0;
	req.reply_len = 0;
	req.reply_expected = 1;
	if (pmu_queue_request(&req) != 0) {
		printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
		return -EIO;
	}
	pmu_wait_complete(&req);

	if (save_autopoll != 0)
		pmu_adb_autopoll(save_autopoll);

	return 0;
}
#endif /* CONFIG_ADB */

/* Construct and send a pmu request */
int __openfirmware
pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
	    int nbytes, ...)
{
	va_list list;
	int i;

	if (vias == NULL)
		return -ENXIO;

	if (nbytes < 0 || nbytes > 32) {
		printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
		req->complete = 1;
		return -EINVAL;
	}
	req->nbytes = nbytes;
	req->done = done;
	va_start(list, nbytes);
	for (i = 0; i < nbytes; ++i)
		req->data[i] = va_arg(list, int);
	va_end(list);
	req->reply_len = 0;
	req->reply_expected = 0;
	return pmu_queue_request(req);
}

int __pmac
pmu_queue_request(struct adb_request *req)
{
	unsigned long flags;
	int nsend;

	if (via == NULL) {
		req->complete = 1;
		return -ENXIO;
	}
	if (req->nbytes <= 0) {
		req->complete = 1;
		return 0;
	}
	nsend = pmu_data_len[req->data[0]][0];
	if (nsend >= 0 && req->nbytes != nsend + 1) {
		req->complete = 1;
		return -EINVAL;
	}

	req->next = NULL;
	req->sent = 0;
	req->complete = 0;

	spin_lock_irqsave(&pmu_lock, flags);
	if (current_req != 0) {
		last_req->next = req;
		last_req = req;
	} else {
		current_req = req;
		last_req = req;
		if (pmu_state == idle)
			pmu_start();
	}
	spin_unlock_irqrestore(&pmu_lock, flags);

	return 0;
}

static inline void
wait_for_ack(void)
{
	/* Sightly increased the delay, I had one occurrence of the message
	 * reported
	 */
	int timeout = 4000;
	while ((in_8(&via[B]) & TACK) == 0) {
		if (--timeout < 0) {
			printk(KERN_ERR "PMU not responding (!ack)\n");
			return;
		}
		udelay(10);
	}
}

/* New PMU seems to be very sensitive to those timings, so we make sure
 * PCI is flushed immediately */
static inline void
send_byte(int x)
{
	volatile unsigned char __iomem *v = via;

	out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
	out_8(&v[SR], x);
	out_8(&v[B], in_8(&v[B]) & ~TREQ);		/* assert TREQ */
	(void)in_8(&v[B]);
}

static inline void
recv_byte(void)
{
	volatile unsigned char __iomem *v = via;

	out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
	in_8(&v[SR]);		/* resets SR */
	out_8(&v[B], in_8(&v[B]) & ~TREQ);
	(void)in_8(&v[B]);
}

static inline void
pmu_done(struct adb_request *req)
{
	void (*done)(struct adb_request *) = req->done;
	mb();
	req->complete = 1;
    	/* Here, we assume that if the request has a done member, the
    	 * struct request will survive to setting req->complete to 1
    	 */
	if (done)
		(*done)(req);
}

static void __pmac
pmu_start(void)
{
	struct adb_request *req;

	/* assert pmu_state == idle */
	/* get the packet to send */
	req = current_req;
	if (req == 0 || pmu_state != idle
	    || (/*req->reply_expected && */req_awaiting_reply))
		return;

	pmu_state = sending;
	data_index = 1;
	data_len = pmu_data_len[req->data[0]][0];

	/* Sounds safer to make sure ACK is high before writing. This helped
	 * kill a problem with ADB and some iBooks
	 */
	wait_for_ack();
	/* set the shift register to shift out and send a byte */
	send_byte(req->data[0]);
}

void __openfirmware
pmu_poll(void)
{
	if (!via)
		return;
	if (disable_poll)
		return;
	via_pmu_interrupt(0, NULL, NULL);
}

void __openfirmware
pmu_poll_adb(void)
{
	if (!via)
		return;
	if (disable_poll)
		return;
	/* Kicks ADB read when PMU is suspended */
	adb_int_pending = 1;
	do {
		via_pmu_interrupt(0, NULL, NULL);
	} while (pmu_suspended && (adb_int_pending || pmu_state != idle
		|| req_awaiting_reply));
}

void __openfirmware
pmu_wait_complete(struct adb_request *req)
{
	if (!via)
		return;
	while((pmu_state != idle && pmu_state != locked) || !req->complete)
		via_pmu_interrupt(0, NULL, NULL);
}

/* This function loops until the PMU is idle and prevents it from
 * anwsering to ADB interrupts. pmu_request can still be called.
 * This is done to avoid spurrious shutdowns when we know we'll have
 * interrupts switched off for a long time
 */
void __openfirmware
pmu_suspend(void)
{
	unsigned long flags;
#ifdef SUSPEND_USES_PMU
	struct adb_request *req;
#endif
	if (!via)
		return;
	
	spin_lock_irqsave(&pmu_lock, flags);
	pmu_suspended++;
	if (pmu_suspended > 1) {
		spin_unlock_irqrestore(&pmu_lock, flags);
		return;
	}

	do {
		spin_unlock_irqrestore(&pmu_lock, flags);
		if (req_awaiting_reply)
			adb_int_pending = 1;
		via_pmu_interrupt(0, NULL, NULL);
		spin_lock_irqsave(&pmu_lock, flags);
		if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
#ifdef SUSPEND_USES_PMU
			pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
			spin_unlock_irqrestore(&pmu_lock, flags);
			while(!req.complete)
				pmu_poll();
#else /* SUSPEND_USES_PMU */
			if (gpio_irq >= 0)
				disable_irq_nosync(gpio_irq);
			out_8(&via[IER], CB1_INT | IER_CLR);
			spin_unlock_irqrestore(&pmu_lock, flags);
#endif /* SUSPEND_USES_PMU */
			break;
		}
	} while (1);
}

void __openfirmware
pmu_resume(void)
{
	unsigned long flags;

	if (!via || (pmu_suspended < 1))
		return;

	spin_lock_irqsave(&pmu_lock, flags);
	pmu_suspended--;
	if (pmu_suspended > 0) {
		spin_unlock_irqrestore(&pmu_lock, flags);
		return;
	}
	adb_int_pending = 1;
#ifdef SUSPEND_USES_PMU
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	spin_unlock_irqrestore(&pmu_lock, flags);
	while(!req.complete)
		pmu_poll();
#else /* SUSPEND_USES_PMU */
	if (gpio_irq >= 0)
		enable_irq(gpio_irq);
	out_8(&via[IER], CB1_INT | IER_SET);
	spin_unlock_irqrestore(&pmu_lock, flags);
	pmu_poll();
#endif /* SUSPEND_USES_PMU */
}

/* Interrupt data could be the result data from an ADB cmd */
static void __pmac
pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
{
	unsigned char ints, pirq;
	int i = 0;

	asleep = 0;
	if (drop_interrupts || len < 1) {
		adb_int_pending = 0;
		pmu_irq_stats[8]++;
		return;
	}

	/* Get PMU interrupt mask */
	ints = data[0];

	/* Record zero interrupts for stats */
	if (ints == 0)
		pmu_irq_stats[9]++;

	/* Hack to deal with ADB autopoll flag */
	if (ints & PMU_INT_ADB)
		ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);

next:

	if (ints == 0) {
		if (i > pmu_irq_stats[10])
			pmu_irq_stats[10] = i;
		return;
	}

	for (pirq = 0; pirq < 8; pirq++)
		if (ints & (1 << pirq))
			break;
	pmu_irq_stats[pirq]++;
	i++;
	ints &= ~(1 << pirq);

	/* Note: for some reason, we get an interrupt with len=1,
	 * data[0]==0 after each normal ADB interrupt, at least
	 * on the Pismo. Still investigating...  --BenH
	 */
	if ((1 << pirq) & PMU_INT_ADB) {
		if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
			struct adb_request *req = req_awaiting_reply;
			if (req == 0) {
				printk(KERN_ERR "PMU: extra ADB reply\n");
				return;
			}
			req_awaiting_reply = NULL;
			if (len <= 2)
				req->reply_len = 0;
			else {
				memcpy(req->reply, data + 1, len - 1);
				req->reply_len = len - 1;
			}
			pmu_done(req);
		} else {
#if defined(CONFIG_XMON) && !defined(CONFIG_PPC64)
			if (len == 4 && data[1] == 0x2c) {
				extern int xmon_wants_key, xmon_adb_keycode;
				if (xmon_wants_key) {
					xmon_adb_keycode = data[2];
					return;
				}
			}
#endif /* defined(CONFIG_XMON) && !defined(CONFIG_PPC64) */
#ifdef CONFIG_ADB
			/*
			 * XXX On the [23]400 the PMU gives us an up
			 * event for keycodes 0x74 or 0x75 when the PC
			 * card eject buttons are released, so we
			 * ignore those events.
			 */
			if (!(pmu_kind == PMU_OHARE_BASED && len == 4
			      && data[1] == 0x2c && data[3] == 0xff
			      && (data[2] & ~1) == 0xf4))
				adb_input(data+1, len-1, regs, 1);
#endif /* CONFIG_ADB */		
		}
	}
	/* Sound/brightness button pressed */
	else if ((1 << pirq) & PMU_INT_SNDBRT) {
#ifdef CONFIG_PMAC_BACKLIGHT
		if (len == 3)
#ifdef CONFIG_INPUT_ADBHID
			if (!disable_kernel_backlight)
#endif /* CONFIG_INPUT_ADBHID */
				set_backlight_level(data[1] >> 4);
#endif /* CONFIG_PMAC_BACKLIGHT */
	}
	/* Tick interrupt */
	else if ((1 << pirq) & PMU_INT_TICK) {
		/* Environement or tick interrupt, query batteries */
		if (pmu_battery_count) {
			if ((--query_batt_timer) == 0) {
				query_battery_state();
				query_batt_timer = BATTERY_POLLING_COUNT;
			}
		}
        }
	else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
		if (pmu_battery_count)
			query_battery_state();
		pmu_pass_intr(data, len);
	} else {
	       pmu_pass_intr(data, len);
	}
	goto next;
}

static struct adb_request* __pmac
pmu_sr_intr(struct pt_regs *regs)
{
	struct adb_request *req;
	int bite = 0;

	if (via[B] & TREQ) {
		printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
		out_8(&via[IFR], SR_INT);
		return NULL;
	}
	/* The ack may not yet be low when we get the interrupt */
	while ((in_8(&via[B]) & TACK) != 0)
			;

	/* if reading grab the byte, and reset the interrupt */
	if (pmu_state == reading || pmu_state == reading_intr)
		bite = in_8(&via[SR]);

	/* reset TREQ and wait for TACK to go high */
	out_8(&via[B], in_8(&via[B]) | TREQ);
	wait_for_ack();

	switch (pmu_state) {
	case sending:
		req = current_req;
		if (data_len < 0) {
			data_len = req->nbytes - 1;
			send_byte(data_len);
			break;
		}
		if (data_index <= data_len) {
			send_byte(req->data[data_index++]);
			break;
		}
		req->sent = 1;
		data_len = pmu_data_len[req->data[0]][1];
		if (data_len == 0) {
			pmu_state = idle;
			current_req = req->next;
			if (req->reply_expected)
				req_awaiting_reply = req;
			else
				return req;
		} else {
			pmu_state = reading;
			data_index = 0;
			reply_ptr = req->reply + req->reply_len;
			recv_byte();
		}
		break;

	case intack:
		data_index = 0;
		data_len = -1;
		pmu_state = reading_intr;
		reply_ptr = interrupt_data[int_data_last];
		recv_byte();
		if (gpio_irq >= 0 && !gpio_irq_enabled) {
			enable_irq(gpio_irq);
			gpio_irq_enabled = 1;
		}
		break;

	case reading:
	case reading_intr:
		if (data_len == -1) {
			data_len = bite;
			if (bite > 32)
				printk(KERN_ERR "PMU: bad reply len %d\n", bite);
		} else if (data_index < 32) {
			reply_ptr[data_index++] = bite;
		}
		if (data_index < data_len) {
			recv_byte();
			break;
		}

		if (pmu_state == reading_intr) {
			pmu_state = idle;
			int_data_state[int_data_last] = int_data_ready;
			interrupt_data_len[int_data_last] = data_len;
		} else {
			req = current_req;
			/* 
			 * For PMU sleep and freq change requests, we lock the
			 * PMU until it's explicitely unlocked. This avoids any
			 * spurrious event polling getting in
			 */
			current_req = req->next;
			req->reply_len += data_index;
			if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
				pmu_state = locked;
			else
				pmu_state = idle;
			return req;
		}
		break;

	default:
		printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
		       pmu_state);
	}
	return NULL;
}

static irqreturn_t __pmac
via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
{
	unsigned long flags;
	int intr;
	int nloop = 0;
	int int_data = -1;
	struct adb_request *req = NULL;
	int handled = 0;

	/* This is a bit brutal, we can probably do better */
	spin_lock_irqsave(&pmu_lock, flags);
	++disable_poll;
	
	for (;;) {
		intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
		if (intr == 0)
			break;
		handled = 1;
		if (++nloop > 1000) {
			printk(KERN_DEBUG "PMU: stuck in intr loop, "
			       "intr=%x, ier=%x pmu_state=%d\n",
			       intr, in_8(&via[IER]), pmu_state);
			break;
		}
		out_8(&via[IFR], intr);
		if (intr & CB1_INT) {
			adb_int_pending = 1;
			pmu_irq_stats[0]++;
		}
		if (intr & SR_INT) {
			req = pmu_sr_intr(regs);
			if (req)
				break;
		}
	}

recheck:
	if (pmu_state == idle) {
		if (adb_int_pending) {
			if (int_data_state[0] == int_data_empty)
				int_data_last = 0;
			else if (int_data_state[1] == int_data_empty)
				int_data_last = 1;
			else
				goto no_free_slot;
			pmu_state = intack;
			int_data_state[int_data_last] = int_data_fill;
			/* Sounds safer to make sure ACK is high before writing.
			 * This helped kill a problem with ADB and some iBooks
			 */
			wait_for_ack();
			send_byte(PMU_INT_ACK);
			adb_int_pending = 0;
		} else if (current_req)
			pmu_start();
	}
no_free_slot:			
	/* Mark the oldest buffer for flushing */
	if (int_data_state[!int_data_last] == int_data_ready) {
		int_data_state[!int_data_last] = int_data_flush;
		int_data = !int_data_last;
	} else if (int_data_state[int_data_last] == int_data_ready) {
		int_data_state[int_data_last] = int_data_flush;
		int_data = int_data_last;
	}
	--disable_poll;
	spin_unlock_irqrestore(&pmu_lock, flags);

	/* Deal with completed PMU requests outside of the lock */
	if (req) {
		pmu_done(req);
		req = NULL;
	}
		
	/* Deal with interrupt datas outside of the lock */
	if (int_data >= 0) {
		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
		spin_lock_irqsave(&pmu_lock, flags);
		++disable_poll;
		int_data_state[int_data] = int_data_empty;
		int_data = -1;
		goto recheck;
	}

	return IRQ_RETVAL(handled);
}

void __pmac
pmu_unlock(void)
{
	unsigned long flags;

	spin_lock_irqsave(&pmu_lock, flags);
	if (pmu_state == locked)
		pmu_state = idle;
	adb_int_pending = 1;
	spin_unlock_irqrestore(&pmu_lock, flags);
}


static irqreturn_t __pmac
gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
{
	unsigned long flags;

	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
		spin_lock_irqsave(&pmu_lock, flags);
		if (gpio_irq_enabled > 0) {
			disable_irq_nosync(gpio_irq);
			gpio_irq_enabled = 0;
		}
		pmu_irq_stats[1]++;
		adb_int_pending = 1;
		spin_unlock_irqrestore(&pmu_lock, flags);
		via_pmu_interrupt(0, NULL, NULL);
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

#ifdef CONFIG_PMAC_BACKLIGHT
static int backlight_to_bright[] __pmacdata = {
	0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
	0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
};
 
static int __openfirmware
pmu_set_backlight_enable(int on, int level, void* data)
{
	struct adb_request req;
	
	if (vias == NULL)
		return -ENODEV;

	if (on) {
		pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
			    backlight_to_bright[level]);
		pmu_wait_complete(&req);
	}
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
		    PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
       	pmu_wait_complete(&req);

	return 0;
}

static void __openfirmware
pmu_bright_complete(struct adb_request *req)
{
	if (req == &bright_req_1)
		clear_bit(1, &async_req_locks);
	if (req == &bright_req_2)
		clear_bit(2, &async_req_locks);
}

static int __openfirmware
pmu_set_backlight_level(int level, void* data)
{
	if (vias == NULL)
		return -ENODEV;

	if (test_and_set_bit(1, &async_req_locks))
		return -EAGAIN;
	pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
		backlight_to_bright[level]);
	if (test_and_set_bit(2, &async_req_locks))
		return -EAGAIN;
	pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
		    PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
					 PMU_POW_ON : PMU_POW_OFF));

	return 0;
}
#endif /* CONFIG_PMAC_BACKLIGHT */

void __pmac
pmu_enable_irled(int on)
{
	struct adb_request req;

	if (vias == NULL)
		return ;
	if (pmu_kind == PMU_KEYLARGO_BASED)
		return ;

	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
	    (on ? PMU_POW_ON : PMU_POW_OFF));
	pmu_wait_complete(&req);
}

void __pmac
pmu_restart(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

	drop_interrupts = 1;
	
	if (pmu_kind != PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
						PMU_INT_TICK );
		while(!req.complete)
			pmu_poll();
	}

	pmu_request(&req, NULL, 1, PMU_RESET);
	pmu_wait_complete(&req);
	for (;;)
		;
}

void __pmac
pmu_shutdown(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

	drop_interrupts = 1;

	if (pmu_kind != PMU_KEYLARGO_BASED) {
		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
						PMU_INT_TICK );
		pmu_wait_complete(&req);
	} else {
		/* Disable server mode on shutdown or we'll just
		 * wake up again
		 */
		pmu_set_server_mode(0);
	}

	pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
		    'M', 'A', 'T', 'T');
	pmu_wait_complete(&req);
	for (;;)
		;
}

int
pmu_present(void)
{
	return via != 0;
}

struct pmu_i2c_hdr {
	u8	bus;
	u8	mode;
	u8	bus2;
	u8	address;
	u8	sub_addr;
	u8	comb_addr;
	u8	count;
};

int
pmu_i2c_combined_read(int bus, int addr, int subaddr,  u8* data, int len)
{
	struct adb_request	req;
	struct pmu_i2c_hdr	*hdr = (struct pmu_i2c_hdr *)&req.data[1];
	int retry;
	int rc;

	for (retry=0; retry<16; retry++) {
		memset(&req, 0, sizeof(req));

		hdr->bus = bus;
		hdr->address = addr & 0xfe;
		hdr->mode = PMU_I2C_MODE_COMBINED;
		hdr->bus2 = 0;
		hdr->sub_addr = subaddr;
		hdr->comb_addr = addr | 1;
		hdr->count = len;
		
		req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
		req.reply_expected = 0;
		req.reply_len = 0;
		req.data[0] = PMU_I2C_CMD;
		req.reply[0] = 0xff;
		rc = pmu_queue_request(&req);
		if (rc)
			return rc;
		while(!req.complete)
			pmu_poll();
		if (req.reply[0] == PMU_I2C_STATUS_OK)
			break;
		mdelay(15);
	}
	if (req.reply[0] != PMU_I2C_STATUS_OK)
		return -1;

	for (retry=0; retry<16; retry++) {
		memset(&req, 0, sizeof(req));

		mdelay(15);

		hdr->bus = PMU_I2C_BUS_STATUS;
		req.reply[0] = 0xff;
		
		req.nbytes = 2;
		req.reply_expected = 0;
		req.reply_len = 0;
		req.data[0] = PMU_I2C_CMD;
		rc = pmu_queue_request(&req);
		if (rc)
			return rc;
		while(!req.complete)
			pmu_poll();
		if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
			memcpy(data, &req.reply[1], req.reply_len - 1);
			return req.reply_len - 1;
		}
	}
	return -1;
}

int
pmu_i2c_stdsub_write(int bus, int addr, int subaddr,  u8* data, int len)
{
	struct adb_request	req;
	struct pmu_i2c_hdr	*hdr = (struct pmu_i2c_hdr *)&req.data[1];
	int retry;
	int rc;

	for (retry=0; retry<16; retry++) {
		memset(&req, 0, sizeof(req));

		hdr->bus = bus;
		hdr->address = addr & 0xfe;
		hdr->mode = PMU_I2C_MODE_STDSUB;
		hdr->bus2 = 0;
		hdr->sub_addr = subaddr;
		hdr->comb_addr = addr & 0xfe;
		hdr->count = len;

		req.data[0] = PMU_I2C_CMD;
		memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
		req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
		req.reply_expected = 0;
		req.reply_len = 0;
		req.reply[0] = 0xff;
		rc = pmu_queue_request(&req);
		if (rc)
			return rc;
		while(!req.complete)
			pmu_poll();
		if (req.reply[0] == PMU_I2C_STATUS_OK)
			break;
		mdelay(15);
	}
	if (req.reply[0] != PMU_I2C_STATUS_OK)
		return -1;

	for (retry=0; retry<16; retry++) {
		memset(&req, 0, sizeof(req));

		mdelay(15);

		hdr->bus = PMU_I2C_BUS_STATUS;
		req.reply[0] = 0xff;
		
		req.nbytes = 2;
		req.reply_expected = 0;
		req.reply_len = 0;
		req.data[0] = PMU_I2C_CMD;
		rc = pmu_queue_request(&req);
		if (rc)
			return rc;
		while(!req.complete)
			pmu_poll();
		if (req.reply[0] == PMU_I2C_STATUS_OK)
			return len;