1/*
   2 * Device driver for the via-pmu on Apple Powermacs.
   3 *
   4 * The VIA (versatile interface adapter) interfaces to the PMU,
   5 * a 6805 microprocessor core whose primary function is to control
   6 * battery charging and system power on the PowerBook 3400 and 2400.
   7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8 * to the keyboard and mouse, as well as the non-volatile RAM
   9 * and the RTC (real time clock) chip.
  10 *
  11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13 * Copyright (C) 2006-2007 Johannes Berg
  14 *
  15 * THIS DRIVER IS BECOMING A TOTAL MESS !
  16 *  - Cleanup atomically disabling reply to PMU events after
  17 *    a sleep or a freq. switch
  18 *
  19 */
  20#include <stdarg.h>
  21#include <linux/mutex.h>
  22#include <linux/types.h>
  23#include <linux/errno.h>
  24#include <linux/kernel.h>
  25#include <linux/delay.h>
  26#include <linux/sched.h>
  27#include <linux/miscdevice.h>
  28#include <linux/blkdev.h>
  29#include <linux/pci.h>
  30#include <linux/slab.h>
  31#include <linux/poll.h>
  32#include <linux/adb.h>
  33#include <linux/pmu.h>
  34#include <linux/cuda.h>
  35#include <linux/module.h>
  36#include <linux/spinlock.h>
  37#include <linux/pm.h>
  38#include <linux/proc_fs.h>
  39#include <linux/seq_file.h>
  40#include <linux/init.h>
  41#include <linux/interrupt.h>
  42#include <linux/device.h>
  43#include <linux/syscore_ops.h>
  44#include <linux/freezer.h>
  45#include <linux/syscalls.h>
  46#include <linux/suspend.h>
  47#include <linux/cpu.h>
  48#include <linux/compat.h>
  49#include <linux/of_address.h>
  50#include <linux/of_irq.h>
  51#include <asm/prom.h>
  52#include <asm/machdep.h>
  53#include <asm/io.h>
  54#include <asm/pgtable.h>
  55#include <asm/sections.h>
  56#include <asm/irq.h>
  57#include <asm/pmac_feature.h>
  58#include <asm/pmac_pfunc.h>
  59#include <asm/pmac_low_i2c.h>
  60#include <asm/uaccess.h>
  61#include <asm/mmu_context.h>
  62#include <asm/cputable.h>
  63#include <asm/time.h>
  64#include <asm/backlight.h>
  65
  66#include "via-pmu-event.h"
  67
  68/* Some compile options */
  69#undef DEBUG_SLEEP
  70
  71/* Misc minor number allocated for /dev/pmu */
  72#define PMU_MINOR		154
  73
  74/* How many iterations between battery polls */
  75#define BATTERY_POLLING_COUNT	2
  76
  77static DEFINE_MUTEX(pmu_info_proc_mutex);
  78static volatile unsigned char __iomem *via;
  79
  80/* VIA registers - spaced 0x200 bytes apart */
  81#define RS		0x200		/* skip between registers */
  82#define B		0		/* B-side data */
  83#define A		RS		/* A-side data */
  84#define DIRB		(2*RS)		/* B-side direction (1=output) */
  85#define DIRA		(3*RS)		/* A-side direction (1=output) */
  86#define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
  87#define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
  88#define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
  89#define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
  90#define T2CL		(8*RS)		/* Timer 2 ctr/latch (low 8 bits) */
  91#define T2CH		(9*RS)		/* Timer 2 counter (high 8 bits) */
  92#define SR		(10*RS)		/* Shift register */
  93#define ACR		(11*RS)		/* Auxiliary control register */
  94#define PCR		(12*RS)		/* Peripheral control register */
  95#define IFR		(13*RS)		/* Interrupt flag register */
  96#define IER		(14*RS)		/* Interrupt enable register */
  97#define ANH		(15*RS)		/* A-side data, no handshake */
  98
  99/* Bits in B data register: both active low */
 100#define TACK		0x08		/* Transfer acknowledge (input) */
 101#define TREQ		0x10		/* Transfer request (output) */
 102
 103/* Bits in ACR */
 104#define SR_CTRL		0x1c		/* Shift register control bits */
 105#define SR_EXT		0x0c		/* Shift on external clock */
 106#define SR_OUT		0x10		/* Shift out if 1 */
 107
 108/* Bits in IFR and IER */
 109#define IER_SET		0x80		/* set bits in IER */
 110#define IER_CLR		0		/* clear bits in IER */
 111#define SR_INT		0x04		/* Shift register full/empty */
 112#define CB2_INT		0x08
 113#define CB1_INT		0x10		/* transition on CB1 input */
 114
 115static volatile enum pmu_state {
 116	idle,
 117	sending,
 118	intack,
 119	reading,
 120	reading_intr,
 121	locked,
 122} pmu_state;
 123
 124static volatile enum int_data_state {
 125	int_data_empty,
 126	int_data_fill,
 127	int_data_ready,
 128	int_data_flush
 129} int_data_state[2] = { int_data_empty, int_data_empty };
 130
 131static struct adb_request *current_req;
 132static struct adb_request *last_req;
 133static struct adb_request *req_awaiting_reply;
 134static unsigned char interrupt_data[2][32];
 135static int interrupt_data_len[2];
 136static int int_data_last;
 137static unsigned char *reply_ptr;
 138static int data_index;
 139static int data_len;
 140static volatile int adb_int_pending;
 141static volatile int disable_poll;
 142static struct device_node *vias;
 143static int pmu_kind = PMU_UNKNOWN;
 144static int pmu_fully_inited;
 145static int pmu_has_adb;
 146static struct device_node *gpio_node;
 147static unsigned char __iomem *gpio_reg;
 148static int gpio_irq = NO_IRQ;
 149static int gpio_irq_enabled = -1;
 150static volatile int pmu_suspended;
 151static spinlock_t pmu_lock;
 152static u8 pmu_intr_mask;
 153static int pmu_version;
 154static int drop_interrupts;
 155#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 156static int option_lid_wakeup = 1;
 157#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 158static unsigned long async_req_locks;
 159static unsigned int pmu_irq_stats[11];
 160
 161static struct proc_dir_entry *proc_pmu_root;
 162static struct proc_dir_entry *proc_pmu_info;
 163static struct proc_dir_entry *proc_pmu_irqstats;
 164static struct proc_dir_entry *proc_pmu_options;
 165static int option_server_mode;
 166
 167int pmu_battery_count;
 168int pmu_cur_battery;
 169unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 170struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 171static int query_batt_timer = BATTERY_POLLING_COUNT;
 172static struct adb_request batt_req;
 173static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 174
 175int __fake_sleep;
 176int asleep;
 177
 178#ifdef CONFIG_ADB
 179static int adb_dev_map;
 180static int pmu_adb_flags;
 181
 182static int pmu_probe(void);
 183static int pmu_init(void);
 184static int pmu_send_request(struct adb_request *req, int sync);
 185static int pmu_adb_autopoll(int devs);
 186static int pmu_adb_reset_bus(void);
 187#endif /* CONFIG_ADB */
 188
 189static int init_pmu(void);
 190static void pmu_start(void);
 191static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 192static irqreturn_t gpio1_interrupt(int irq, void *arg);
 193static const struct file_operations pmu_info_proc_fops;
 194static const struct file_operations pmu_irqstats_proc_fops;
 195static void pmu_pass_intr(unsigned char *data, int len);
 196static const struct file_operations pmu_battery_proc_fops;
 197static const struct file_operations pmu_options_proc_fops;
 198
 199#ifdef CONFIG_ADB
 200struct adb_driver via_pmu_driver = {
 201	"PMU",
 202	pmu_probe,
 203	pmu_init,
 204	pmu_send_request,
 205	pmu_adb_autopoll,
 206	pmu_poll_adb,
 207	pmu_adb_reset_bus
 208};
 209#endif /* CONFIG_ADB */
 210
 211extern void low_sleep_handler(void);
 212extern void enable_kernel_altivec(void);
 213extern void enable_kernel_fp(void);
 214
 215#ifdef DEBUG_SLEEP
 216int pmu_polled_request(struct adb_request *req);
 217void pmu_blink(int n);
 218#endif
 219
 220/*
 221 * This table indicates for each PMU opcode:
 222 * - the number of data bytes to be sent with the command, or -1
 223 *   if a length byte should be sent,
 224 * - the number of response bytes which the PMU will return, or
 225 *   -1 if it will send a length byte.
 226 */
 227static const s8 pmu_data_len[256][2] = {
 228/*	   0	   1	   2	   3	   4	   5	   6	   7  */
 229/*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 230/*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 231/*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 232/*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 233/*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 234/*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 235/*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 236/*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 237/*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 238/*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 239/*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 240/*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 241/*60*/	{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242/*68*/	{ 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 243/*70*/	{ 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 244/*78*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 245/*80*/	{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246/*88*/	{ 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 247/*90*/	{ 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248/*98*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 249/*a0*/	{ 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 250/*a8*/	{ 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 251/*b0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252/*b8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 253/*c0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254/*c8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 255/*d0*/	{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256/*d8*/	{ 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 257/*e0*/	{-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 258/*e8*/	{ 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 259/*f0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260/*f8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261};
 262
 263static char *pbook_type[] = {
 264	"Unknown PowerBook",
 265	"PowerBook 2400/3400/3500(G3)",
 266	"PowerBook G3 Series",
 267	"1999 PowerBook G3",
 268	"Core99"
 269};
 270
 271int __init find_via_pmu(void)
 272{
 273	u64 taddr;
 274	const u32 *reg;
 275
 276	if (via != 0)
 277		return 1;
 278	vias = of_find_node_by_name(NULL, "via-pmu");
 279	if (vias == NULL)
 280		return 0;
 281
 282	reg = of_get_property(vias, "reg", NULL);
 283	if (reg == NULL) {
 284		printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 285		goto fail;
 286	}
 287	taddr = of_translate_address(vias, reg);
 288	if (taddr == OF_BAD_ADDR) {
 289		printk(KERN_ERR "via-pmu: Can't translate address !\n");
 290		goto fail;
 291	}
 292
 293	spin_lock_init(&pmu_lock);
 294
 295	pmu_has_adb = 1;
 296
 297	pmu_intr_mask =	PMU_INT_PCEJECT |
 298			PMU_INT_SNDBRT |
 299			PMU_INT_ADB |
 300			PMU_INT_TICK;
 301	
 302	if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 303	    || of_device_is_compatible(vias->parent, "ohare")))
 304		pmu_kind = PMU_OHARE_BASED;
 305	else if (of_device_is_compatible(vias->parent, "paddington"))
 306		pmu_kind = PMU_PADDINGTON_BASED;
 307	else if (of_device_is_compatible(vias->parent, "heathrow"))
 308		pmu_kind = PMU_HEATHROW_BASED;
 309	else if (of_device_is_compatible(vias->parent, "Keylargo")
 310		 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 311		struct device_node *gpiop;
 312		struct device_node *adbp;
 313		u64 gaddr = OF_BAD_ADDR;
 314
 315		pmu_kind = PMU_KEYLARGO_BASED;
 316		adbp = of_find_node_by_type(NULL, "adb");
 317		pmu_has_adb = (adbp != NULL);
 318		of_node_put(adbp);
 319		pmu_intr_mask =	PMU_INT_PCEJECT |
 320				PMU_INT_SNDBRT |
 321				PMU_INT_ADB |
 322				PMU_INT_TICK |
 323				PMU_INT_ENVIRONMENT;
 324		
 325		gpiop = of_find_node_by_name(NULL, "gpio");
 326		if (gpiop) {
 327			reg = of_get_property(gpiop, "reg", NULL);
 328			if (reg)
 329				gaddr = of_translate_address(gpiop, reg);
 330			if (gaddr != OF_BAD_ADDR)
 331				gpio_reg = ioremap(gaddr, 0x10);
 332			of_node_put(gpiop);
 333		}
 334		if (gpio_reg == NULL) {
 335			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 336			goto fail;
 337		}
 338	} else
 339		pmu_kind = PMU_UNKNOWN;
 340
 341	via = ioremap(taddr, 0x2000);
 342	if (via == NULL) {
 343		printk(KERN_ERR "via-pmu: Can't map address !\n");
 344		goto fail_via_remap;
 345	}
 346	
 347	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
 348	out_8(&via[IFR], 0x7f);			/* clear IFR */
 349
 350	pmu_state = idle;
 351
 352	if (!init_pmu())
 353		goto fail_init;
 
 
 354
 355	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 356	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 357	       
 358	sys_ctrler = SYS_CTRLER_PMU;
 359	
 360	return 1;
 361
 362 fail_init:
 363	iounmap(via);
 364	via = NULL;
 365 fail_via_remap:
 366	iounmap(gpio_reg);
 367	gpio_reg = NULL;
 368 fail:
 369	of_node_put(vias);
 
 
 
 370	vias = NULL;
 371	return 0;
 372}
 373
 374#ifdef CONFIG_ADB
 375static int pmu_probe(void)
 376{
 377	return vias == NULL? -ENODEV: 0;
 378}
 379
 380static int __init pmu_init(void)
 381{
 382	if (vias == NULL)
 383		return -ENODEV;
 384	return 0;
 385}
 386#endif /* CONFIG_ADB */
 387
 388/*
 389 * We can't wait until pmu_init gets called, that happens too late.
 390 * It happens after IDE and SCSI initialization, which can take a few
 391 * seconds, and by that time the PMU could have given up on us and
 392 * turned us off.
 393 * Thus this is called with arch_initcall rather than device_initcall.
 394 */
 395static int __init via_pmu_start(void)
 396{
 397	unsigned int irq;
 398
 399	if (vias == NULL)
 400		return -ENODEV;
 401
 402	batt_req.complete = 1;
 403
 404	irq = irq_of_parse_and_map(vias, 0);
 405	if (irq == NO_IRQ) {
 406		printk(KERN_ERR "via-pmu: can't map interrupt\n");
 407		return -ENODEV;
 408	}
 409	/* We set IRQF_NO_SUSPEND because we don't want the interrupt
 410	 * to be disabled between the 2 passes of driver suspend, we
 411	 * control our own disabling for that one
 412	 */
 413	if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 414			"VIA-PMU", (void *)0)) {
 415		printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 416		return -ENODEV;
 417	}
 418
 419	if (pmu_kind == PMU_KEYLARGO_BASED) {
 420		gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 421		if (gpio_node == NULL)
 422			gpio_node = of_find_node_by_name(NULL,
 423							 "pmu-interrupt");
 424		if (gpio_node)
 425			gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 426
 427		if (gpio_irq != NO_IRQ) {
 428			if (request_irq(gpio_irq, gpio1_interrupt,
 429					IRQF_NO_SUSPEND, "GPIO1 ADB",
 430					(void *)0))
 431				printk(KERN_ERR "pmu: can't get irq %d"
 432				       " (GPIO1)\n", gpio_irq);
 433			else
 434				gpio_irq_enabled = 1;
 435		}
 436	}
 437
 438	/* Enable interrupts */
 439	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 440
 441	pmu_fully_inited = 1;
 442
 443	/* Make sure PMU settle down before continuing. This is _very_ important
 444	 * since the IDE probe may shut interrupts down for quite a bit of time. If
 445	 * a PMU communication is pending while this happens, the PMU may timeout
 446	 * Not that on Core99 machines, the PMU keeps sending us environement
 447	 * messages, we should find a way to either fix IDE or make it call
 448	 * pmu_suspend() before masking interrupts. This can also happens while
 449	 * scolling with some fbdevs.
 450	 */
 451	do {
 452		pmu_poll();
 453	} while (pmu_state != idle);
 454
 455	return 0;
 456}
 457
 458arch_initcall(via_pmu_start);
 459
 460/*
 461 * This has to be done after pci_init, which is a subsys_initcall.
 462 */
 463static int __init via_pmu_dev_init(void)
 464{
 465	if (vias == NULL)
 466		return -ENODEV;
 467
 468#ifdef CONFIG_PMAC_BACKLIGHT
 469	/* Initialize backlight */
 470	pmu_backlight_init();
 471#endif
 472
 473#ifdef CONFIG_PPC32
 474  	if (of_machine_is_compatible("AAPL,3400/2400") ||
 475  		of_machine_is_compatible("AAPL,3500")) {
 476		int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 477			NULL, PMAC_MB_INFO_MODEL, 0);
 478		pmu_battery_count = 1;
 479		if (mb == PMAC_TYPE_COMET)
 480			pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 481		else
 482			pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 483	} else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 484		of_machine_is_compatible("PowerBook1,1")) {
 485		pmu_battery_count = 2;
 486		pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 487		pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 488	} else {
 489		struct device_node* prim =
 490			of_find_node_by_name(NULL, "power-mgt");
 491		const u32 *prim_info = NULL;
 492		if (prim)
 493			prim_info = of_get_property(prim, "prim-info", NULL);
 494		if (prim_info) {
 495			/* Other stuffs here yet unknown */
 496			pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 497			pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 498			if (pmu_battery_count > 1)
 499				pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 500		}
 501		of_node_put(prim);
 502	}
 503#endif /* CONFIG_PPC32 */
 504
 505	/* Create /proc/pmu */
 506	proc_pmu_root = proc_mkdir("pmu", NULL);
 507	if (proc_pmu_root) {
 508		long i;
 509
 510		for (i=0; i<pmu_battery_count; i++) {
 511			char title[16];
 512			sprintf(title, "battery_%ld", i);
 513			proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 514					&pmu_battery_proc_fops, (void *)i);
 515		}
 516
 517		proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 518		proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 519						&pmu_irqstats_proc_fops);
 520		proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 521						&pmu_options_proc_fops);
 522	}
 523	return 0;
 524}
 525
 526device_initcall(via_pmu_dev_init);
 527
 528static int
 529init_pmu(void)
 530{
 531	int timeout;
 532	struct adb_request req;
 533
 534	out_8(&via[B], via[B] | TREQ);			/* negate TREQ */
 535	out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);	/* TACK in, TREQ out */
 536
 537	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 538	timeout =  100000;
 539	while (!req.complete) {
 540		if (--timeout < 0) {
 541			printk(KERN_ERR "init_pmu: no response from PMU\n");
 542			return 0;
 543		}
 544		udelay(10);
 545		pmu_poll();
 546	}
 547
 548	/* ack all pending interrupts */
 549	timeout = 100000;
 550	interrupt_data[0][0] = 1;
 551	while (interrupt_data[0][0] || pmu_state != idle) {
 552		if (--timeout < 0) {
 553			printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 554			return 0;
 555		}
 556		if (pmu_state == idle)
 557			adb_int_pending = 1;
 558		via_pmu_interrupt(0, NULL);
 559		udelay(10);
 560	}
 561
 562	/* Tell PMU we are ready.  */
 563	if (pmu_kind == PMU_KEYLARGO_BASED) {
 564		pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 565		while (!req.complete)
 566			pmu_poll();
 567	}
 568
 569	/* Read PMU version */
 570	pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 571	pmu_wait_complete(&req);
 572	if (req.reply_len > 0)
 573		pmu_version = req.reply[0];
 574	
 575	/* Read server mode setting */
 576	if (pmu_kind == PMU_KEYLARGO_BASED) {
 577		pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 578			    PMU_PWR_GET_POWERUP_EVENTS);
 579		pmu_wait_complete(&req);
 580		if (req.reply_len == 2) {
 581			if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 582				option_server_mode = 1;
 583			printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 584			       option_server_mode ? "enabled" : "disabled");
 585		}
 586	}
 587	return 1;
 588}
 589
 590int
 591pmu_get_model(void)
 592{
 593	return pmu_kind;
 594}
 595
 596static void pmu_set_server_mode(int server_mode)
 597{
 598	struct adb_request req;
 599
 600	if (pmu_kind != PMU_KEYLARGO_BASED)
 601		return;
 602
 603	option_server_mode = server_mode;
 604	pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 605	pmu_wait_complete(&req);
 606	if (req.reply_len < 2)
 607		return;
 608	if (server_mode)
 609		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 610			    PMU_PWR_SET_POWERUP_EVENTS,
 611			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
 612	else
 613		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 614			    PMU_PWR_CLR_POWERUP_EVENTS,
 615			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 
 616	pmu_wait_complete(&req);
 617}
 618
 619/* This new version of the code for 2400/3400/3500 powerbooks
 620 * is inspired from the implementation in gkrellm-pmu
 621 */
 622static void
 623done_battery_state_ohare(struct adb_request* req)
 624{
 625	/* format:
 626	 *  [0]    :  flags
 627	 *    0x01 :  AC indicator
 628	 *    0x02 :  charging
 629	 *    0x04 :  battery exist
 630	 *    0x08 :  
 631	 *    0x10 :  
 632	 *    0x20 :  full charged
 633	 *    0x40 :  pcharge reset
 634	 *    0x80 :  battery exist
 635	 *
 636	 *  [1][2] :  battery voltage
 637	 *  [3]    :  CPU temperature
 638	 *  [4]    :  battery temperature
 639	 *  [5]    :  current
 640	 *  [6][7] :  pcharge
 641	 *              --tkoba
 642	 */
 643	unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 644	long pcharge, charge, vb, vmax, lmax;
 645	long vmax_charging, vmax_charged;
 646	long amperage, voltage, time, max;
 647	int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 648			NULL, PMAC_MB_INFO_MODEL, 0);
 649
 650	if (req->reply[0] & 0x01)
 651		pmu_power_flags |= PMU_PWR_AC_PRESENT;
 652	else
 653		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 654	
 655	if (mb == PMAC_TYPE_COMET) {
 656		vmax_charged = 189;
 657		vmax_charging = 213;
 658		lmax = 6500;
 659	} else {
 660		vmax_charged = 330;
 661		vmax_charging = 330;
 662		lmax = 6500;
 663	}
 664	vmax = vmax_charged;
 665
 666	/* If battery installed */
 667	if (req->reply[0] & 0x04) {
 668		bat_flags |= PMU_BATT_PRESENT;
 669		if (req->reply[0] & 0x02)
 670			bat_flags |= PMU_BATT_CHARGING;
 671		vb = (req->reply[1] << 8) | req->reply[2];
 672		voltage = (vb * 265 + 72665) / 10;
 673		amperage = req->reply[5];
 674		if ((req->reply[0] & 0x01) == 0) {
 675			if (amperage > 200)
 676				vb += ((amperage - 200) * 15)/100;
 677		} else if (req->reply[0] & 0x02) {
 678			vb = (vb * 97) / 100;
 679			vmax = vmax_charging;
 680		}
 681		charge = (100 * vb) / vmax;
 682		if (req->reply[0] & 0x40) {
 683			pcharge = (req->reply[6] << 8) + req->reply[7];
 684			if (pcharge > lmax)
 685				pcharge = lmax;
 686			pcharge *= 100;
 687			pcharge = 100 - pcharge / lmax;
 688			if (pcharge < charge)
 689				charge = pcharge;
 690		}
 691		if (amperage > 0)
 692			time = (charge * 16440) / amperage;
 693		else
 694			time = 0;
 695		max = 100;
 696		amperage = -amperage;
 697	} else
 698		charge = max = amperage = voltage = time = 0;
 699
 700	pmu_batteries[pmu_cur_battery].flags = bat_flags;
 701	pmu_batteries[pmu_cur_battery].charge = charge;
 702	pmu_batteries[pmu_cur_battery].max_charge = max;
 703	pmu_batteries[pmu_cur_battery].amperage = amperage;
 704	pmu_batteries[pmu_cur_battery].voltage = voltage;
 705	pmu_batteries[pmu_cur_battery].time_remaining = time;
 706
 707	clear_bit(0, &async_req_locks);
 708}
 709
 710static void
 711done_battery_state_smart(struct adb_request* req)
 712{
 713	/* format:
 714	 *  [0] : format of this structure (known: 3,4,5)
 715	 *  [1] : flags
 716	 *  
 717	 *  format 3 & 4:
 718	 *  
 719	 *  [2] : charge
 720	 *  [3] : max charge
 721	 *  [4] : current
 722	 *  [5] : voltage
 723	 *  
 724	 *  format 5:
 725	 *  
 726	 *  [2][3] : charge
 727	 *  [4][5] : max charge
 728	 *  [6][7] : current
 729	 *  [8][9] : voltage
 730	 */
 731	 
 732	unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 733	int amperage;
 734	unsigned int capa, max, voltage;
 735	
 736	if (req->reply[1] & 0x01)
 737		pmu_power_flags |= PMU_PWR_AC_PRESENT;
 738	else
 739		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 740
 741
 742	capa = max = amperage = voltage = 0;
 743	
 744	if (req->reply[1] & 0x04) {
 745		bat_flags |= PMU_BATT_PRESENT;
 746		switch(req->reply[0]) {
 747			case 3:
 748			case 4: capa = req->reply[2];
 749				max = req->reply[3];
 750				amperage = *((signed char *)&req->reply[4]);
 751				voltage = req->reply[5];
 752				break;
 753			case 5: capa = (req->reply[2] << 8) | req->reply[3];
 754				max = (req->reply[4] << 8) | req->reply[5];
 755				amperage = *((signed short *)&req->reply[6]);
 756				voltage = (req->reply[8] << 8) | req->reply[9];
 757				break;
 758			default:
 759				pr_warn("pmu.c: unrecognized battery info, "
 760					"len: %d, %4ph\n", req->reply_len,
 761							   req->reply);
 762				break;
 763		}
 764	}
 765
 766	if ((req->reply[1] & 0x01) && (amperage > 0))
 767		bat_flags |= PMU_BATT_CHARGING;
 768
 769	pmu_batteries[pmu_cur_battery].flags = bat_flags;
 770	pmu_batteries[pmu_cur_battery].charge = capa;
 771	pmu_batteries[pmu_cur_battery].max_charge = max;
 772	pmu_batteries[pmu_cur_battery].amperage = amperage;
 773	pmu_batteries[pmu_cur_battery].voltage = voltage;
 774	if (amperage) {
 775		if ((req->reply[1] & 0x01) && (amperage > 0))
 776			pmu_batteries[pmu_cur_battery].time_remaining
 777				= ((max-capa) * 3600) / amperage;
 778		else
 779			pmu_batteries[pmu_cur_battery].time_remaining
 780				= (capa * 3600) / (-amperage);
 781	} else
 782		pmu_batteries[pmu_cur_battery].time_remaining = 0;
 783
 784	pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 785
 786	clear_bit(0, &async_req_locks);
 787}
 788
 789static void
 790query_battery_state(void)
 791{
 792	if (test_and_set_bit(0, &async_req_locks))
 793		return;
 794	if (pmu_kind == PMU_OHARE_BASED)
 795		pmu_request(&batt_req, done_battery_state_ohare,
 796			1, PMU_BATTERY_STATE);
 797	else
 798		pmu_request(&batt_req, done_battery_state_smart,
 799			2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 800}
 801
 802static int pmu_info_proc_show(struct seq_file *m, void *v)
 803{
 804	seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 805	seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 806	seq_printf(m, "AC Power               : %d\n",
 807		((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 808	seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 809
 810	return 0;
 811}
 812
 813static int pmu_info_proc_open(struct inode *inode, struct file *file)
 814{
 815	return single_open(file, pmu_info_proc_show, NULL);
 816}
 817
 818static const struct file_operations pmu_info_proc_fops = {
 819	.owner		= THIS_MODULE,
 820	.open		= pmu_info_proc_open,
 821	.read		= seq_read,
 822	.llseek		= seq_lseek,
 823	.release	= single_release,
 824};
 825
 826static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 827{
 828	int i;
 829	static const char *irq_names[] = {
 830		"Total CB1 triggered events",
 831		"Total GPIO1 triggered events",
 832		"PC-Card eject button",
 833		"Sound/Brightness button",
 834		"ADB message",
 835		"Battery state change",
 836		"Environment interrupt",
 837		"Tick timer",
 838		"Ghost interrupt (zero len)",
 839		"Empty interrupt (empty mask)",
 840		"Max irqs in a row"
 841        };
 842
 843	for (i=0; i<11; i++) {
 844		seq_printf(m, " %2u: %10u (%s)\n",
 845			     i, pmu_irq_stats[i], irq_names[i]);
 846	}
 847	return 0;
 848}
 849
 850static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 851{
 852	return single_open(file, pmu_irqstats_proc_show, NULL);
 853}
 854
 855static const struct file_operations pmu_irqstats_proc_fops = {
 856	.owner		= THIS_MODULE,
 857	.open		= pmu_irqstats_proc_open,
 858	.read		= seq_read,
 859	.llseek		= seq_lseek,
 860	.release	= single_release,
 861};
 862
 863static int pmu_battery_proc_show(struct seq_file *m, void *v)
 864{
 865	long batnum = (long)m->private;
 866	
 867	seq_putc(m, '\n');
 868	seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 869	seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 870	seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 871	seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 872	seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 873	seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 874	return 0;
 875}
 876
 877static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 878{
 879	return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
 880}
 881
 882static const struct file_operations pmu_battery_proc_fops = {
 883	.owner		= THIS_MODULE,
 884	.open		= pmu_battery_proc_open,
 885	.read		= seq_read,
 886	.llseek		= seq_lseek,
 887	.release	= single_release,
 888};
 889
 890static int pmu_options_proc_show(struct seq_file *m, void *v)
 891{
 892#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 893	if (pmu_kind == PMU_KEYLARGO_BASED &&
 894	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 895		seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 896#endif
 897	if (pmu_kind == PMU_KEYLARGO_BASED)
 898		seq_printf(m, "server_mode=%d\n", option_server_mode);
 899
 900	return 0;
 901}
 902
 903static int pmu_options_proc_open(struct inode *inode, struct file *file)
 904{
 905	return single_open(file, pmu_options_proc_show, NULL);
 906}
 907
 908static ssize_t pmu_options_proc_write(struct file *file,
 909		const char __user *buffer, size_t count, loff_t *pos)
 910{
 911	char tmp[33];
 912	char *label, *val;
 913	size_t fcount = count;
 914	
 915	if (!count)
 916		return -EINVAL;
 917	if (count > 32)
 918		count = 32;
 919	if (copy_from_user(tmp, buffer, count))
 920		return -EFAULT;
 921	tmp[count] = 0;
 922
 923	label = tmp;
 924	while(*label == ' ')
 925		label++;
 926	val = label;
 927	while(*val && (*val != '=')) {
 928		if (*val == ' ')
 929			*val = 0;
 930		val++;
 931	}
 932	if ((*val) == 0)
 933		return -EINVAL;
 934	*(val++) = 0;
 935	while(*val == ' ')
 936		val++;
 937#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 938	if (pmu_kind == PMU_KEYLARGO_BASED &&
 939	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 940		if (!strcmp(label, "lid_wakeup"))
 941			option_lid_wakeup = ((*val) == '1');
 942#endif
 943	if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 944		int new_value;
 945		new_value = ((*val) == '1');
 946		if (new_value != option_server_mode)
 947			pmu_set_server_mode(new_value);
 948	}
 949	return fcount;
 950}
 951
 952static const struct file_operations pmu_options_proc_fops = {
 953	.owner		= THIS_MODULE,
 954	.open		= pmu_options_proc_open,
 955	.read		= seq_read,
 956	.llseek		= seq_lseek,
 957	.release	= single_release,
 958	.write		= pmu_options_proc_write,
 959};
 960
 961#ifdef CONFIG_ADB
 962/* Send an ADB command */
 963static int pmu_send_request(struct adb_request *req, int sync)
 964{
 965	int i, ret;
 966
 967	if ((vias == NULL) || (!pmu_fully_inited)) {
 968		req->complete = 1;
 969		return -ENXIO;
 970	}
 971
 972	ret = -EINVAL;
 973
 974	switch (req->data[0]) {
 975	case PMU_PACKET:
 976		for (i = 0; i < req->nbytes - 1; ++i)
 977			req->data[i] = req->data[i+1];
 978		--req->nbytes;
 979		if (pmu_data_len[req->data[0]][1] != 0) {
 980			req->reply[0] = ADB_RET_OK;
 981			req->reply_len = 1;
 982		} else
 983			req->reply_len = 0;
 984		ret = pmu_queue_request(req);
 985		break;
 986	case CUDA_PACKET:
 987		switch (req->data[1]) {
 988		case CUDA_GET_TIME:
 989			if (req->nbytes != 2)
 990				break;
 991			req->data[0] = PMU_READ_RTC;
 992			req->nbytes = 1;
 993			req->reply_len = 3;
 994			req->reply[0] = CUDA_PACKET;
 995			req->reply[1] = 0;
 996			req->reply[2] = CUDA_GET_TIME;
 997			ret = pmu_queue_request(req);
 998			break;
 999		case CUDA_SET_TIME:
1000			if (req->nbytes != 6)
1001				break;
1002			req->data[0] = PMU_SET_RTC;
1003			req->nbytes = 5;
1004			for (i = 1; i <= 4; ++i)
1005				req->data[i] = req->data[i+1];
1006			req->reply_len = 3;
1007			req->reply[0] = CUDA_PACKET;
1008			req->reply[1] = 0;
1009			req->reply[2] = CUDA_SET_TIME;
1010			ret = pmu_queue_request(req);
1011			break;
1012		}
1013		break;
1014	case ADB_PACKET:
1015	    	if (!pmu_has_adb)
1016    			return -ENXIO;
1017		for (i = req->nbytes - 1; i > 1; --i)
1018			req->data[i+2] = req->data[i];
1019		req->data[3] = req->nbytes - 2;
1020		req->data[2] = pmu_adb_flags;
1021		/*req->data[1] = req->data[1];*/
1022		req->data[0] = PMU_ADB_CMD;
1023		req->nbytes += 2;
1024		req->reply_expected = 1;
1025		req->reply_len = 0;
1026		ret = pmu_queue_request(req);
1027		break;
1028	}
1029	if (ret) {
1030		req->complete = 1;
1031		return ret;
1032	}
1033
1034	if (sync)
1035		while (!req->complete)
1036			pmu_poll();
1037
1038	return 0;
1039}
1040
1041/* Enable/disable autopolling */
1042static int __pmu_adb_autopoll(int devs)
1043{
1044	struct adb_request req;
1045
1046	if (devs) {
1047		pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1048			    adb_dev_map >> 8, adb_dev_map);
1049		pmu_adb_flags = 2;
1050	} else {
1051		pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1052		pmu_adb_flags = 0;
1053	}
1054	while (!req.complete)
1055		pmu_poll();
1056	return 0;
1057}
1058
1059static int pmu_adb_autopoll(int devs)
1060{
1061	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1062		return -ENXIO;
1063
1064	adb_dev_map = devs;
1065	return __pmu_adb_autopoll(devs);
1066}
1067
1068/* Reset the ADB bus */
1069static int pmu_adb_reset_bus(void)
1070{
1071	struct adb_request req;
1072	int save_autopoll = adb_dev_map;
1073
1074	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1075		return -ENXIO;
1076
1077	/* anyone got a better idea?? */
1078	__pmu_adb_autopoll(0);
1079
1080	req.nbytes = 4;
1081	req.done = NULL;
1082	req.data[0] = PMU_ADB_CMD;
1083	req.data[1] = ADB_BUSRESET;
1084	req.data[2] = 0;
1085	req.data[3] = 0;
1086	req.data[4] = 0;
1087	req.reply_len = 0;
1088	req.reply_expected = 1;
1089	if (pmu_queue_request(&req) != 0) {
1090		printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1091		return -EIO;
1092	}
1093	pmu_wait_complete(&req);
1094
1095	if (save_autopoll != 0)
1096		__pmu_adb_autopoll(save_autopoll);
1097
1098	return 0;
1099}
1100#endif /* CONFIG_ADB */
1101
1102/* Construct and send a pmu request */
1103int
1104pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1105	    int nbytes, ...)
1106{
1107	va_list list;
1108	int i;
1109
1110	if (vias == NULL)
1111		return -ENXIO;
1112
1113	if (nbytes < 0 || nbytes > 32) {
1114		printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1115		req->complete = 1;
1116		return -EINVAL;
1117	}
1118	req->nbytes = nbytes;
1119	req->done = done;
1120	va_start(list, nbytes);
1121	for (i = 0; i < nbytes; ++i)
1122		req->data[i] = va_arg(list, int);
1123	va_end(list);
1124	req->reply_len = 0;
1125	req->reply_expected = 0;
1126	return pmu_queue_request(req);
1127}
1128
1129int
1130pmu_queue_request(struct adb_request *req)
1131{
1132	unsigned long flags;
1133	int nsend;
1134
1135	if (via == NULL) {
1136		req->complete = 1;
1137		return -ENXIO;
1138	}
1139	if (req->nbytes <= 0) {
1140		req->complete = 1;
1141		return 0;
1142	}
1143	nsend = pmu_data_len[req->data[0]][0];
1144	if (nsend >= 0 && req->nbytes != nsend + 1) {
1145		req->complete = 1;
1146		return -EINVAL;
1147	}
1148
1149	req->next = NULL;
1150	req->sent = 0;
1151	req->complete = 0;
1152
1153	spin_lock_irqsave(&pmu_lock, flags);
1154	if (current_req != 0) {
1155		last_req->next = req;
1156		last_req = req;
1157	} else {
1158		current_req = req;
1159		last_req = req;
1160		if (pmu_state == idle)
1161			pmu_start();
1162	}
1163	spin_unlock_irqrestore(&pmu_lock, flags);
1164
1165	return 0;
1166}
1167
1168static inline void
1169wait_for_ack(void)
1170{
1171	/* Sightly increased the delay, I had one occurrence of the message
1172	 * reported
1173	 */
1174	int timeout = 4000;
1175	while ((in_8(&via[B]) & TACK) == 0) {
1176		if (--timeout < 0) {
1177			printk(KERN_ERR "PMU not responding (!ack)\n");
1178			return;
1179		}
1180		udelay(10);
1181	}
1182}
1183
1184/* New PMU seems to be very sensitive to those timings, so we make sure
1185 * PCI is flushed immediately */
1186static inline void
1187send_byte(int x)
1188{
1189	volatile unsigned char __iomem *v = via;
1190
1191	out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1192	out_8(&v[SR], x);
1193	out_8(&v[B], in_8(&v[B]) & ~TREQ);		/* assert TREQ */
1194	(void)in_8(&v[B]);
1195}
1196
1197static inline void
1198recv_byte(void)
1199{
1200	volatile unsigned char __iomem *v = via;
1201
1202	out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1203	in_8(&v[SR]);		/* resets SR */
1204	out_8(&v[B], in_8(&v[B]) & ~TREQ);
1205	(void)in_8(&v[B]);
1206}
1207
1208static inline void
1209pmu_done(struct adb_request *req)
1210{
1211	void (*done)(struct adb_request *) = req->done;
1212	mb();
1213	req->complete = 1;
1214    	/* Here, we assume that if the request has a done member, the
1215    	 * struct request will survive to setting req->complete to 1
1216    	 */
1217	if (done)
1218		(*done)(req);
1219}
1220
1221static void
1222pmu_start(void)
1223{
1224	struct adb_request *req;
1225
1226	/* assert pmu_state == idle */
1227	/* get the packet to send */
1228	req = current_req;
1229	if (req == 0 || pmu_state != idle
1230	    || (/*req->reply_expected && */req_awaiting_reply))
1231		return;
1232
1233	pmu_state = sending;
1234	data_index = 1;
1235	data_len = pmu_data_len[req->data[0]][0];
1236
1237	/* Sounds safer to make sure ACK is high before writing. This helped
1238	 * kill a problem with ADB and some iBooks
1239	 */
1240	wait_for_ack();
1241	/* set the shift register to shift out and send a byte */
1242	send_byte(req->data[0]);
1243}
1244
1245void
1246pmu_poll(void)
1247{
1248	if (!via)
1249		return;
1250	if (disable_poll)
1251		return;
1252	via_pmu_interrupt(0, NULL);
1253}
1254
1255void
1256pmu_poll_adb(void)
1257{
1258	if (!via)
1259		return;
1260	if (disable_poll)
1261		return;
1262	/* Kicks ADB read when PMU is suspended */
1263	adb_int_pending = 1;
1264	do {
1265		via_pmu_interrupt(0, NULL);
1266	} while (pmu_suspended && (adb_int_pending || pmu_state != idle
1267		|| req_awaiting_reply));
1268}
1269
1270void
1271pmu_wait_complete(struct adb_request *req)
1272{
1273	if (!via)
1274		return;
1275	while((pmu_state != idle && pmu_state != locked) || !req->complete)
1276		via_pmu_interrupt(0, NULL);
1277}
1278
1279/* This function loops until the PMU is idle and prevents it from
1280 * anwsering to ADB interrupts. pmu_request can still be called.
1281 * This is done to avoid spurrious shutdowns when we know we'll have
1282 * interrupts switched off for a long time
1283 */
1284void
1285pmu_suspend(void)
1286{
1287	unsigned long flags;
1288
1289	if (!via)
1290		return;
1291	
1292	spin_lock_irqsave(&pmu_lock, flags);
1293	pmu_suspended++;
1294	if (pmu_suspended > 1) {
1295		spin_unlock_irqrestore(&pmu_lock, flags);
1296		return;
1297	}
1298
1299	do {
1300		spin_unlock_irqrestore(&pmu_lock, flags);
1301		if (req_awaiting_reply)
1302			adb_int_pending = 1;
1303		via_pmu_interrupt(0, NULL);
1304		spin_lock_irqsave(&pmu_lock, flags);
1305		if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1306			if (gpio_irq >= 0)
1307				disable_irq_nosync(gpio_irq);
1308			out_8(&via[IER], CB1_INT | IER_CLR);
1309			spin_unlock_irqrestore(&pmu_lock, flags);
1310			break;
1311		}
1312	} while (1);
1313}
1314
1315void
1316pmu_resume(void)
1317{
1318	unsigned long flags;
1319
1320	if (!via || (pmu_suspended < 1))
1321		return;
1322
1323	spin_lock_irqsave(&pmu_lock, flags);
1324	pmu_suspended--;
1325	if (pmu_suspended > 0) {
1326		spin_unlock_irqrestore(&pmu_lock, flags);
1327		return;
1328	}
1329	adb_int_pending = 1;
1330	if (gpio_irq >= 0)
1331		enable_irq(gpio_irq);
1332	out_8(&via[IER], CB1_INT | IER_SET);
1333	spin_unlock_irqrestore(&pmu_lock, flags);
1334	pmu_poll();
1335}
1336
1337/* Interrupt data could be the result data from an ADB cmd */
1338static void
1339pmu_handle_data(unsigned char *data, int len)
1340{
1341	unsigned char ints, pirq;
1342	int i = 0;
1343
1344	asleep = 0;
1345	if (drop_interrupts || len < 1) {
1346		adb_int_pending = 0;
1347		pmu_irq_stats[8]++;
1348		return;
1349	}
1350
1351	/* Get PMU interrupt mask */
1352	ints = data[0];
1353
1354	/* Record zero interrupts for stats */
1355	if (ints == 0)
1356		pmu_irq_stats[9]++;
1357
1358	/* Hack to deal with ADB autopoll flag */
1359	if (ints & PMU_INT_ADB)
1360		ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1361
1362next:
1363
1364	if (ints == 0) {
1365		if (i > pmu_irq_stats[10])
1366			pmu_irq_stats[10] = i;
1367		return;
1368	}
1369
1370	for (pirq = 0; pirq < 8; pirq++)
1371		if (ints & (1 << pirq))
1372			break;
1373	pmu_irq_stats[pirq]++;
1374	i++;
1375	ints &= ~(1 << pirq);
1376
1377	/* Note: for some reason, we get an interrupt with len=1,
1378	 * data[0]==0 after each normal ADB interrupt, at least
1379	 * on the Pismo. Still investigating...  --BenH
1380	 */
1381	if ((1 << pirq) & PMU_INT_ADB) {
1382		if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1383			struct adb_request *req = req_awaiting_reply;
1384			if (req == 0) {
1385				printk(KERN_ERR "PMU: extra ADB reply\n");
1386				return;
1387			}
1388			req_awaiting_reply = NULL;
1389			if (len <= 2)
1390				req->reply_len = 0;
1391			else {
1392				memcpy(req->reply, data + 1, len - 1);
1393				req->reply_len = len - 1;
1394			}
1395			pmu_done(req);
1396		} else {
1397			if (len == 4 && data[1] == 0x2c) {
1398				extern int xmon_wants_key, xmon_adb_keycode;
1399				if (xmon_wants_key) {
1400					xmon_adb_keycode = data[2];
1401					return;
1402				}
1403			}
1404#ifdef CONFIG_ADB
1405			/*
1406			 * XXX On the [23]400 the PMU gives us an up
1407			 * event for keycodes 0x74 or 0x75 when the PC
1408			 * card eject buttons are released, so we
1409			 * ignore those events.
1410			 */
1411			if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1412			      && data[1] == 0x2c && data[3] == 0xff
1413			      && (data[2] & ~1) == 0xf4))
1414				adb_input(data+1, len-1, 1);
1415#endif /* CONFIG_ADB */		
1416		}
1417	}
1418	/* Sound/brightness button pressed */
1419	else if ((1 << pirq) & PMU_INT_SNDBRT) {
1420#ifdef CONFIG_PMAC_BACKLIGHT
1421		if (len == 3)
1422			pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1423#endif
1424	}
1425	/* Tick interrupt */
1426	else if ((1 << pirq) & PMU_INT_TICK) {
1427		/* Environement or tick interrupt, query batteries */
1428		if (pmu_battery_count) {
1429			if ((--query_batt_timer) == 0) {
1430				query_battery_state();
1431				query_batt_timer = BATTERY_POLLING_COUNT;
1432			}
1433		}
1434        }
1435	else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1436		if (pmu_battery_count)
1437			query_battery_state();
1438		pmu_pass_intr(data, len);
1439		/* len == 6 is probably a bad check. But how do I
1440		 * know what PMU versions send what events here? */
1441		if (len == 6) {
1442			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1443			via_pmu_event(PMU_EVT_LID, data[1]&1);
1444		}
1445	} else {
1446	       pmu_pass_intr(data, len);
1447	}
1448	goto next;
1449}
1450
1451static struct adb_request*
1452pmu_sr_intr(void)
1453{
1454	struct adb_request *req;
1455	int bite = 0;
1456
1457	if (via[B] & TREQ) {
1458		printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1459		out_8(&via[IFR], SR_INT);
1460		return NULL;
1461	}
1462	/* The ack may not yet be low when we get the interrupt */
1463	while ((in_8(&via[B]) & TACK) != 0)
1464			;
1465
1466	/* if reading grab the byte, and reset the interrupt */
1467	if (pmu_state == reading || pmu_state == reading_intr)
1468		bite = in_8(&via[SR]);
1469
1470	/* reset TREQ and wait for TACK to go high */
1471	out_8(&via[B], in_8(&via[B]) | TREQ);
1472	wait_for_ack();
1473
1474	switch (pmu_state) {
1475	case sending:
1476		req = current_req;
1477		if (data_len < 0) {
1478			data_len = req->nbytes - 1;
1479			send_byte(data_len);
1480			break;
1481		}
1482		if (data_index <= data_len) {
1483			send_byte(req->data[data_index++]);
1484			break;
1485		}
1486		req->sent = 1;
1487		data_len = pmu_data_len[req->data[0]][1];
1488		if (data_len == 0) {
1489			pmu_state = idle;
1490			current_req = req->next;
1491			if (req->reply_expected)
1492				req_awaiting_reply = req;
1493			else
1494				return req;
1495		} else {
1496			pmu_state = reading;
1497			data_index = 0;
1498			reply_ptr = req->reply + req->reply_len;
1499			recv_byte();
1500		}
1501		break;
1502
1503	case intack:
1504		data_index = 0;
1505		data_len = -1;
1506		pmu_state = reading_intr;
1507		reply_ptr = interrupt_data[int_data_last];
1508		recv_byte();
1509		if (gpio_irq >= 0 && !gpio_irq_enabled) {
1510			enable_irq(gpio_irq);
1511			gpio_irq_enabled = 1;
1512		}
1513		break;
1514
1515	case reading:
1516	case reading_intr:
1517		if (data_len == -1) {
1518			data_len = bite;
1519			if (bite > 32)
1520				printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1521		} else if (data_index < 32) {
1522			reply_ptr[data_index++] = bite;
1523		}
1524		if (data_index < data_len) {
1525			recv_byte();
1526			break;
1527		}
1528
1529		if (pmu_state == reading_intr) {
1530			pmu_state = idle;
1531			int_data_state[int_data_last] = int_data_ready;
1532			interrupt_data_len[int_data_last] = data_len;
1533		} else {
1534			req = current_req;
1535			/* 
1536			 * For PMU sleep and freq change requests, we lock the
1537			 * PMU until it's explicitly unlocked. This avoids any
1538			 * spurrious event polling getting in
1539			 */
1540			current_req = req->next;
1541			req->reply_len += data_index;
1542			if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1543				pmu_state = locked;
1544			else
1545				pmu_state = idle;
1546			return req;
1547		}
1548		break;
1549
1550	default:
1551		printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1552		       pmu_state);
1553	}
1554	return NULL;
1555}
1556
1557static irqreturn_t
1558via_pmu_interrupt(int irq, void *arg)
1559{
1560	unsigned long flags;
1561	int intr;
1562	int nloop = 0;
1563	int int_data = -1;
1564	struct adb_request *req = NULL;
1565	int handled = 0;
1566
1567	/* This is a bit brutal, we can probably do better */
1568	spin_lock_irqsave(&pmu_lock, flags);
1569	++disable_poll;
1570	
1571	for (;;) {
1572		intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1573		if (intr == 0)
1574			break;
1575		handled = 1;
1576		if (++nloop > 1000) {
1577			printk(KERN_DEBUG "PMU: stuck in intr loop, "
1578			       "intr=%x, ier=%x pmu_state=%d\n",
1579			       intr, in_8(&via[IER]), pmu_state);
1580			break;
1581		}
1582		out_8(&via[IFR], intr);
1583		if (intr & CB1_INT) {
1584			adb_int_pending = 1;
1585			pmu_irq_stats[0]++;
1586		}
1587		if (intr & SR_INT) {
1588			req = pmu_sr_intr();
1589			if (req)
1590				break;
1591		}
1592	}
1593
1594recheck:
1595	if (pmu_state == idle) {
1596		if (adb_int_pending) {
1597			if (int_data_state[0] == int_data_empty)
1598				int_data_last = 0;
1599			else if (int_data_state[1] == int_data_empty)
1600				int_data_last = 1;
1601			else
1602				goto no_free_slot;
1603			pmu_state = intack;
1604			int_data_state[int_data_last] = int_data_fill;
1605			/* Sounds safer to make sure ACK is high before writing.
1606			 * This helped kill a problem with ADB and some iBooks
1607			 */
1608			wait_for_ack();
1609			send_byte(PMU_INT_ACK);
1610			adb_int_pending = 0;
1611		} else if (current_req)
1612			pmu_start();
1613	}
1614no_free_slot:			
1615	/* Mark the oldest buffer for flushing */
1616	if (int_data_state[!int_data_last] == int_data_ready) {
1617		int_data_state[!int_data_last] = int_data_flush;
1618		int_data = !int_data_last;
1619	} else if (int_data_state[int_data_last] == int_data_ready) {
1620		int_data_state[int_data_last] = int_data_flush;
1621		int_data = int_data_last;
1622	}
1623	--disable_poll;
1624	spin_unlock_irqrestore(&pmu_lock, flags);
1625
1626	/* Deal with completed PMU requests outside of the lock */
1627	if (req) {
1628		pmu_done(req);
1629		req = NULL;
1630	}
1631		
1632	/* Deal with interrupt datas outside of the lock */
1633	if (int_data >= 0) {
1634		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1635		spin_lock_irqsave(&pmu_lock, flags);
1636		++disable_poll;
1637		int_data_state[int_data] = int_data_empty;
1638		int_data = -1;
1639		goto recheck;
1640	}
1641
1642	return IRQ_RETVAL(handled);
1643}
1644
1645void
1646pmu_unlock(void)
1647{
1648	unsigned long flags;
1649
1650	spin_lock_irqsave(&pmu_lock, flags);
1651	if (pmu_state == locked)
1652		pmu_state = idle;
1653	adb_int_pending = 1;
1654	spin_unlock_irqrestore(&pmu_lock, flags);
1655}
1656
1657
1658static irqreturn_t
1659gpio1_interrupt(int irq, void *arg)
1660{
1661	unsigned long flags;
1662
1663	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1664		spin_lock_irqsave(&pmu_lock, flags);
1665		if (gpio_irq_enabled > 0) {
1666			disable_irq_nosync(gpio_irq);
1667			gpio_irq_enabled = 0;
1668		}
1669		pmu_irq_stats[1]++;
1670		adb_int_pending = 1;
1671		spin_unlock_irqrestore(&pmu_lock, flags);
1672		via_pmu_interrupt(0, NULL);
1673		return IRQ_HANDLED;
1674	}
1675	return IRQ_NONE;
1676}
1677
1678void
1679pmu_enable_irled(int on)
1680{
1681	struct adb_request req;
1682
1683	if (vias == NULL)
1684		return ;
1685	if (pmu_kind == PMU_KEYLARGO_BASED)
1686		return ;
1687
1688	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1689	    (on ? PMU_POW_ON : PMU_POW_OFF));
1690	pmu_wait_complete(&req);
1691}
1692
1693void
1694pmu_restart(void)
1695{
1696	struct adb_request req;
1697
1698	if (via == NULL)
1699		return;
1700
1701	local_irq_disable();
1702
1703	drop_interrupts = 1;
1704	
1705	if (pmu_kind != PMU_KEYLARGO_BASED) {
1706		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1707						PMU_INT_TICK );
1708		while(!req.complete)
1709			pmu_poll();
1710	}
1711
1712	pmu_request(&req, NULL, 1, PMU_RESET);
1713	pmu_wait_complete(&req);
1714	for (;;)
1715		;
1716}
1717
1718void
1719pmu_shutdown(void)
1720{
1721	struct adb_request req;
1722
1723	if (via == NULL)
1724		return;
1725
1726	local_irq_disable();
1727
1728	drop_interrupts = 1;
1729
1730	if (pmu_kind != PMU_KEYLARGO_BASED) {
1731		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1732						PMU_INT_TICK );
1733		pmu_wait_complete(&req);
1734	} else {
1735		/* Disable server mode on shutdown or we'll just
1736		 * wake up again
1737		 */
1738		pmu_set_server_mode(0);
1739	}
1740
1741	pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1742		    'M', 'A', 'T', 'T');
1743	pmu_wait_complete(&req);
1744	for (;;)
1745		;
1746}
1747
1748int
1749pmu_present(void)
1750{
1751	return via != 0;
1752}
1753
1754#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1755/*
1756 * Put the powerbook to sleep.
1757 */
1758 
1759static u32 save_via[8];
1760
1761static void
1762save_via_state(void)
1763{
1764	save_via[0] = in_8(&via[ANH]);
1765	save_via[1] = in_8(&via[DIRA]);
1766	save_via[2] = in_8(&via[B]);
1767	save_via[3] = in_8(&via[DIRB]);
1768	save_via[4] = in_8(&via[PCR]);
1769	save_via[5] = in_8(&via[ACR]);
1770	save_via[6] = in_8(&via[T1CL]);
1771	save_via[7] = in_8(&via[T1CH]);
1772}
1773static void
1774restore_via_state(void)
1775{
1776	out_8(&via[ANH], save_via[0]);
1777	out_8(&via[DIRA], save_via[1]);
1778	out_8(&via[B], save_via[2]);
1779	out_8(&via[DIRB], save_via[3]);
1780	out_8(&via[PCR], save_via[4]);
1781	out_8(&via[ACR], save_via[5]);
1782	out_8(&via[T1CL], save_via[6]);
1783	out_8(&via[T1CH], save_via[7]);
1784	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
1785	out_8(&via[IFR], 0x7f);				/* clear IFR */
1786	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1787}
1788
1789#define	GRACKLE_PM	(1<<7)
1790#define GRACKLE_DOZE	(1<<5)
1791#define	GRACKLE_NAP	(1<<4)
1792#define	GRACKLE_SLEEP	(1<<3)
1793
1794static int powerbook_sleep_grackle(void)
1795{
1796	unsigned long save_l2cr;
1797	unsigned short pmcr1;
1798	struct adb_request req;
1799	struct pci_dev *grackle;
1800
1801	grackle = pci_get_bus_and_slot(0, 0);
1802	if (!grackle)
1803		return -ENODEV;
1804
1805	/* Turn off various things. Darwin does some retry tests here... */
1806	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1807	pmu_wait_complete(&req);
1808	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1809		PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1810	pmu_wait_complete(&req);
1811
1812	/* For 750, save backside cache setting and disable it */
1813	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1814
1815	if (!__fake_sleep) {
1816		/* Ask the PMU to put us to sleep */
1817		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1818		pmu_wait_complete(&req);
1819	}
1820
1821	/* The VIA is supposed not to be restored correctly*/
1822	save_via_state();
1823	/* We shut down some HW */
1824	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1825
1826	pci_read_config_word(grackle, 0x70, &pmcr1);
1827	/* Apparently, MacOS uses NAP mode for Grackle ??? */
1828	pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
1829	pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1830	pci_write_config_word(grackle, 0x70, pmcr1);
1831
1832	/* Call low-level ASM sleep handler */
1833	if (__fake_sleep)
1834		mdelay(5000);
1835	else
1836		low_sleep_handler();
1837
1838	/* We're awake again, stop grackle PM */
1839	pci_read_config_word(grackle, 0x70, &pmcr1);
1840	pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
1841	pci_write_config_word(grackle, 0x70, pmcr1);
1842
1843	pci_dev_put(grackle);
1844
1845	/* Make sure the PMU is idle */
1846	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1847	restore_via_state();
1848	
1849	/* Restore L2 cache */
1850	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1851 		_set_L2CR(save_l2cr);
1852	
1853	/* Restore userland MMU context */
1854	switch_mmu_context(NULL, current->active_mm);
1855
1856	/* Power things up */
1857	pmu_unlock();
1858	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1859	pmu_wait_complete(&req);
1860	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1861			PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1862	pmu_wait_complete(&req);
1863	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1864			PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1865	pmu_wait_complete(&req);
1866
1867	return 0;
1868}
1869
1870static int
1871powerbook_sleep_Core99(void)
1872{
1873	unsigned long save_l2cr;
1874	unsigned long save_l3cr;
1875	struct adb_request req;
1876	
1877	if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1878		printk(KERN_ERR "Sleep mode not supported on this machine\n");
1879		return -ENOSYS;
1880	}
1881
1882	if (num_online_cpus() > 1 || cpu_is_offline(0))
1883		return -EAGAIN;
1884
1885	/* Stop environment and ADB interrupts */
1886	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1887	pmu_wait_complete(&req);
1888
1889	/* Tell PMU what events will wake us up */
1890	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1891		0xff, 0xff);
1892	pmu_wait_complete(&req);
1893	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1894		0, PMU_PWR_WAKEUP_KEY |
1895		(option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1896	pmu_wait_complete(&req);
1897
1898	/* Save the state of the L2 and L3 caches */
1899	save_l3cr = _get_L3CR();	/* (returns -1 if not available) */
1900	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1901
1902	if (!__fake_sleep) {
1903		/* Ask the PMU to put us to sleep */
1904		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1905		pmu_wait_complete(&req);
1906	}
1907
1908	/* The VIA is supposed not to be restored correctly*/
1909	save_via_state();
1910
1911	/* Shut down various ASICs. There's a chance that we can no longer
1912	 * talk to the PMU after this, so I moved it to _after_ sending the
1913	 * sleep command to it. Still need to be checked.
1914	 */
1915	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1916
1917	/* Call low-level ASM sleep handler */
1918	if (__fake_sleep)
1919		mdelay(5000);
1920	else
1921		low_sleep_handler();
1922
1923	/* Restore Apple core ASICs state */
1924	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1925
1926	/* Restore VIA */
1927	restore_via_state();
1928
1929	/* tweak LPJ before cpufreq is there */
1930	loops_per_jiffy *= 2;
1931
1932	/* Restore video */
1933	pmac_call_early_video_resume();
1934
1935	/* Restore L2 cache */
1936	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1937 		_set_L2CR(save_l2cr);
1938	/* Restore L3 cache */
1939	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1940 		_set_L3CR(save_l3cr);
1941	
1942	/* Restore userland MMU context */
1943	switch_mmu_context(NULL, current->active_mm);
1944
1945	/* Tell PMU we are ready */
1946	pmu_unlock();
1947	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1948	pmu_wait_complete(&req);
1949	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1950	pmu_wait_complete(&req);
1951
1952	/* Restore LPJ, cpufreq will adjust the cpu frequency */
1953	loops_per_jiffy /= 2;
1954
1955	return 0;
1956}
1957
1958#define PB3400_MEM_CTRL		0xf8000000
1959#define PB3400_MEM_CTRL_SLEEP	0x70
1960
1961static void __iomem *pb3400_mem_ctrl;
1962
1963static void powerbook_sleep_init_3400(void)
1964{
1965	/* map in the memory controller registers */
1966	pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1967	if (pb3400_mem_ctrl == NULL)
1968		printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1969}
1970
1971static int powerbook_sleep_3400(void)
1972{
1973	int i, x;
1974	unsigned int hid0;
1975	unsigned long msr;
1976	struct adb_request sleep_req;
1977	unsigned int __iomem *mem_ctrl_sleep;
1978
1979	if (pb3400_mem_ctrl == NULL)
1980		return -ENOMEM;
1981	mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1982
1983	/* Set the memory controller to keep the memory refreshed
1984	   while we're asleep */
1985	for (i = 0x403f; i >= 0x4000; --i) {
1986		out_be32(mem_ctrl_sleep, i);
1987		do {
1988			x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1989		} while (x == 0);
1990		if (x >= 0x100)
1991			break;
1992	}
1993
1994	/* Ask the PMU to put us to sleep */
1995	pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1996	pmu_wait_complete(&sleep_req);
1997	pmu_unlock();
1998
1999	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2000
2001	asleep = 1;
2002
2003	/* Put the CPU into sleep mode */
2004	hid0 = mfspr(SPRN_HID0);
2005	hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2006	mtspr(SPRN_HID0, hid0);
2007	local_irq_enable();
2008	msr = mfmsr() | MSR_POW;
2009	while (asleep) {
2010		mb();
2011		mtmsr(msr);
2012		isync();
2013	}
2014	local_irq_disable();
2015
2016	/* OK, we're awake again, start restoring things */
2017	out_be32(mem_ctrl_sleep, 0x3f);
2018	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2019
2020	return 0;
2021}
2022
2023#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2024
2025/*
2026 * Support for /dev/pmu device
2027 */
2028#define RB_SIZE		0x10
2029struct pmu_private {
2030	struct list_head list;
2031	int	rb_get;
2032	int	rb_put;
2033	struct rb_entry {
2034		unsigned short len;
2035		unsigned char data[16];
2036	}	rb_buf[RB_SIZE];
2037	wait_queue_head_t wait;
2038	spinlock_t lock;
2039#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2040	int	backlight_locker;
2041#endif
2042};
2043
2044static LIST_HEAD(all_pmu_pvt);
2045static DEFINE_SPINLOCK(all_pvt_lock);
2046
2047static void
2048pmu_pass_intr(unsigned char *data, int len)
2049{
2050	struct pmu_private *pp;
2051	struct list_head *list;
2052	int i;
2053	unsigned long flags;
2054
2055	if (len > sizeof(pp->rb_buf[0].data))
2056		len = sizeof(pp->rb_buf[0].data);
2057	spin_lock_irqsave(&all_pvt_lock, flags);
2058	for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2059		pp = list_entry(list, struct pmu_private, list);
2060		spin_lock(&pp->lock);
2061		i = pp->rb_put + 1;
2062		if (i >= RB_SIZE)
2063			i = 0;
2064		if (i != pp->rb_get) {
2065			struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2066			rp->len = len;
2067			memcpy(rp->data, data, len);
2068			pp->rb_put = i;
2069			wake_up_interruptible(&pp->wait);
2070		}
2071		spin_unlock(&pp->lock);
2072	}
2073	spin_unlock_irqrestore(&all_pvt_lock, flags);
2074}
2075
2076static int
2077pmu_open(struct inode *inode, struct file *file)
2078{
2079	struct pmu_private *pp;
2080	unsigned long flags;
2081
2082	pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2083	if (pp == 0)
2084		return -ENOMEM;
2085	pp->rb_get = pp->rb_put = 0;
2086	spin_lock_init(&pp->lock);
2087	init_waitqueue_head(&pp->wait);
2088	mutex_lock(&pmu_info_proc_mutex);
2089	spin_lock_irqsave(&all_pvt_lock, flags);
2090#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2091	pp->backlight_locker = 0;
2092#endif
2093	list_add(&pp->list, &all_pmu_pvt);
2094	spin_unlock_irqrestore(&all_pvt_lock, flags);
2095	file->private_data = pp;
2096	mutex_unlock(&pmu_info_proc_mutex);
2097	return 0;
2098}
2099
2100static ssize_t 
2101pmu_read(struct file *file, char __user *buf,
2102			size_t count, loff_t *ppos)
2103{
2104	struct pmu_private *pp = file->private_data;
2105	DECLARE_WAITQUEUE(wait, current);
2106	unsigned long flags;
2107	int ret = 0;
2108
2109	if (count < 1 || pp == 0)
2110		return -EINVAL;
2111	if (!access_ok(VERIFY_WRITE, buf, count))
2112		return -EFAULT;
2113
2114	spin_lock_irqsave(&pp->lock, flags);
2115	add_wait_queue(&pp->wait, &wait);
2116	set_current_state(TASK_INTERRUPTIBLE);
2117
2118	for (;;) {
2119		ret = -EAGAIN;
2120		if (pp->rb_get != pp->rb_put) {
2121			int i = pp->rb_get;
2122			struct rb_entry *rp = &pp->rb_buf[i];
2123			ret = rp->len;
2124			spin_unlock_irqrestore(&pp->lock, flags);
2125			if (ret > count)
2126				ret = count;
2127			if (ret > 0 && copy_to_user(buf, rp->data, ret))
2128				ret = -EFAULT;
2129			if (++i >= RB_SIZE)
2130				i = 0;
2131			spin_lock_irqsave(&pp->lock, flags);
2132			pp->rb_get = i;
2133		}
2134		if (ret >= 0)
2135			break;
2136		if (file->f_flags & O_NONBLOCK)
2137			break;
2138		ret = -ERESTARTSYS;
2139		if (signal_pending(current))
2140			break;
2141		spin_unlock_irqrestore(&pp->lock, flags);
2142		schedule();
2143		spin_lock_irqsave(&pp->lock, flags);
2144	}
2145	__set_current_state(TASK_RUNNING);
2146	remove_wait_queue(&pp->wait, &wait);
2147	spin_unlock_irqrestore(&pp->lock, flags);
2148	
2149	return ret;
2150}
2151
2152static ssize_t
2153pmu_write(struct file *file, const char __user *buf,
2154			 size_t count, loff_t *ppos)
2155{
2156	return 0;
2157}
2158
2159static unsigned int
2160pmu_fpoll(struct file *filp, poll_table *wait)
2161{
2162	struct pmu_private *pp = filp->private_data;
2163	unsigned int mask = 0;
2164	unsigned long flags;
2165	
2166	if (pp == 0)
2167		return 0;
2168	poll_wait(filp, &pp->wait, wait);
2169	spin_lock_irqsave(&pp->lock, flags);
2170	if (pp->rb_get != pp->rb_put)
2171		mask |= POLLIN;
2172	spin_unlock_irqrestore(&pp->lock, flags);
2173	return mask;
2174}
2175
2176static int
2177pmu_release(struct inode *inode, struct file *file)
2178{
2179	struct pmu_private *pp = file->private_data;
2180	unsigned long flags;
2181
2182	if (pp != 0) {
2183		file->private_data = NULL;
2184		spin_lock_irqsave(&all_pvt_lock, flags);
2185		list_del(&pp->list);
2186		spin_unlock_irqrestore(&all_pvt_lock, flags);
2187
2188#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2189		if (pp->backlight_locker)
2190			pmac_backlight_enable();
2191#endif
2192
2193		kfree(pp);
2194	}
2195	return 0;
2196}
2197
2198#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2199static void pmac_suspend_disable_irqs(void)
2200{
2201	/* Call platform functions marked "on sleep" */
2202	pmac_pfunc_i2c_suspend();
2203	pmac_pfunc_base_suspend();
2204}
2205
2206static int powerbook_sleep(suspend_state_t state)
2207{
2208	int error = 0;
2209
2210	/* Wait for completion of async requests */
2211	while (!batt_req.complete)
2212		pmu_poll();
2213
2214	/* Giveup the lazy FPU & vec so we don't have to back them
2215	 * up from the low level code
2216	 */
2217	enable_kernel_fp();
2218
2219#ifdef CONFIG_ALTIVEC
2220	if (cpu_has_feature(CPU_FTR_ALTIVEC))
2221		enable_kernel_altivec();
2222#endif /* CONFIG_ALTIVEC */
2223
2224	switch (pmu_kind) {
2225	case PMU_OHARE_BASED:
2226		error = powerbook_sleep_3400();
2227		break;
2228	case PMU_HEATHROW_BASED:
2229	case PMU_PADDINGTON_BASED:
2230		error = powerbook_sleep_grackle();
2231		break;
2232	case PMU_KEYLARGO_BASED:
2233		error = powerbook_sleep_Core99();
2234		break;
2235	default:
2236		return -ENOSYS;
2237	}
2238
2239	if (error)
2240		return error;
2241
2242	mdelay(100);
2243
2244	return 0;
2245}
2246
2247static void pmac_suspend_enable_irqs(void)
2248{
2249	/* Force a poll of ADB interrupts */
2250	adb_int_pending = 1;
2251	via_pmu_interrupt(0, NULL);
2252
2253	mdelay(10);
2254
2255	/* Call platform functions marked "on wake" */
2256	pmac_pfunc_base_resume();
2257	pmac_pfunc_i2c_resume();
2258}
2259
2260static int pmu_sleep_valid(suspend_state_t state)
2261{
2262	return state == PM_SUSPEND_MEM
2263		&& (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2264}
2265
2266static const struct platform_suspend_ops pmu_pm_ops = {
2267	.enter = powerbook_sleep,
2268	.valid = pmu_sleep_valid,
2269};
2270
2271static int register_pmu_pm_ops(void)
2272{
2273	if (pmu_kind == PMU_OHARE_BASED)
2274		powerbook_sleep_init_3400();
2275	ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2276	ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2277	suspend_set_ops(&pmu_pm_ops);
2278
2279	return 0;
2280}
2281
2282device_initcall(register_pmu_pm_ops);
2283#endif
2284
2285static int pmu_ioctl(struct file *filp,
2286		     u_int cmd, u_long arg)
2287{
2288	__u32 __user *argp = (__u32 __user *)arg;
2289	int error = -EINVAL;
2290
2291	switch (cmd) {
2292	case PMU_IOC_SLEEP:
2293		if (!capable(CAP_SYS_ADMIN))
2294			return -EACCES;
2295		return pm_suspend(PM_SUSPEND_MEM);
2296	case PMU_IOC_CAN_SLEEP:
2297		if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2298			return put_user(0, argp);
2299		else
2300			return put_user(1, argp);
2301
2302#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2303	/* Compatibility ioctl's for backlight */
2304	case PMU_IOC_GET_BACKLIGHT:
2305	{
2306		int brightness;
2307
2308		brightness = pmac_backlight_get_legacy_brightness();
2309		if (brightness < 0)
2310			return brightness;
2311		else
2312			return put_user(brightness, argp);
2313
2314	}
2315	case PMU_IOC_SET_BACKLIGHT:
2316	{
2317		int brightness;
2318
2319		error = get_user(brightness, argp);
2320		if (error)
2321			return error;
2322
2323		return pmac_backlight_set_legacy_brightness(brightness);
2324	}
2325#ifdef CONFIG_INPUT_ADBHID
2326	case PMU_IOC_GRAB_BACKLIGHT: {
2327		struct pmu_private *pp = filp->private_data;
2328
2329		if (pp->backlight_locker)
2330			return 0;
2331
2332		pp->backlight_locker = 1;
2333		pmac_backlight_disable();
2334
2335		return 0;
2336	}
2337#endif /* CONFIG_INPUT_ADBHID */
2338#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2339
2340	case PMU_IOC_GET_MODEL:
2341	    	return put_user(pmu_kind, argp);
2342	case PMU_IOC_HAS_ADB:
2343		return put_user(pmu_has_adb, argp);
2344	}
2345	return error;
2346}
2347
2348static long pmu_unlocked_ioctl(struct file *filp,
2349			       u_int cmd, u_long arg)
2350{
2351	int ret;
2352
2353	mutex_lock(&pmu_info_proc_mutex);
2354	ret = pmu_ioctl(filp, cmd, arg);
2355	mutex_unlock(&pmu_info_proc_mutex);
2356
2357	return ret;
2358}
2359
2360#ifdef CONFIG_COMPAT
2361#define PMU_IOC_GET_BACKLIGHT32	_IOR('B', 1, compat_size_t)
2362#define PMU_IOC_SET_BACKLIGHT32	_IOW('B', 2, compat_size_t)
2363#define PMU_IOC_GET_MODEL32	_IOR('B', 3, compat_size_t)
2364#define PMU_IOC_HAS_ADB32	_IOR('B', 4, compat_size_t)
2365#define PMU_IOC_CAN_SLEEP32	_IOR('B', 5, compat_size_t)
2366#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2367
2368static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2369{
2370	switch (cmd) {
2371	case PMU_IOC_SLEEP:
2372		break;
2373	case PMU_IOC_GET_BACKLIGHT32:
2374		cmd = PMU_IOC_GET_BACKLIGHT;
2375		break;
2376	case PMU_IOC_SET_BACKLIGHT32:
2377		cmd = PMU_IOC_SET_BACKLIGHT;
2378		break;
2379	case PMU_IOC_GET_MODEL32:
2380		cmd = PMU_IOC_GET_MODEL;
2381		break;
2382	case PMU_IOC_HAS_ADB32:
2383		cmd = PMU_IOC_HAS_ADB;
2384		break;
2385	case PMU_IOC_CAN_SLEEP32:
2386		cmd = PMU_IOC_CAN_SLEEP;
2387		break;
2388	case PMU_IOC_GRAB_BACKLIGHT32:
2389		cmd = PMU_IOC_GRAB_BACKLIGHT;
2390		break;
2391	default:
2392		return -ENOIOCTLCMD;
2393	}
2394	return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2395}
2396#endif
2397
2398static const struct file_operations pmu_device_fops = {
2399	.read		= pmu_read,
2400	.write		= pmu_write,
2401	.poll		= pmu_fpoll,
2402	.unlocked_ioctl	= pmu_unlocked_ioctl,
2403#ifdef CONFIG_COMPAT
2404	.compat_ioctl	= compat_pmu_ioctl,
2405#endif
2406	.open		= pmu_open,
2407	.release	= pmu_release,
2408	.llseek		= noop_llseek,
2409};
2410
2411static struct miscdevice pmu_device = {
2412	PMU_MINOR, "pmu", &pmu_device_fops
2413};
2414
2415static int pmu_device_init(void)
2416{
2417	if (!via)
2418		return 0;
2419	if (misc_register(&pmu_device) < 0)
2420		printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2421	return 0;
2422}
2423device_initcall(pmu_device_init);
2424
2425
2426#ifdef DEBUG_SLEEP
2427static inline void 
2428polled_handshake(volatile unsigned char __iomem *via)
2429{
2430	via[B] &= ~TREQ; eieio();
2431	while ((via[B] & TACK) != 0)
2432		;
2433	via[B] |= TREQ; eieio();
2434	while ((via[B] & TACK) == 0)
2435		;
2436}
2437
2438static inline void 
2439polled_send_byte(volatile unsigned char __iomem *via, int x)
2440{
2441	via[ACR] |= SR_OUT | SR_EXT; eieio();
2442	via[SR] = x; eieio();
2443	polled_handshake(via);
2444}
2445
2446static inline int
2447polled_recv_byte(volatile unsigned char __iomem *via)
2448{
2449	int x;
2450
2451	via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2452	x = via[SR]; eieio();
2453	polled_handshake(via);
2454	x = via[SR]; eieio();
2455	return x;
2456}
2457
2458int
2459pmu_polled_request(struct adb_request *req)
2460{
2461	unsigned long flags;
2462	int i, l, c;
2463	volatile unsigned char __iomem *v = via;
2464
2465	req->complete = 1;
2466	c = req->data[0];
2467	l = pmu_data_len[c][0];
2468	if (l >= 0 && req->nbytes != l + 1)
2469		return -EINVAL;
2470
2471	local_irq_save(flags);
2472	while (pmu_state != idle)
2473		pmu_poll();
2474
2475	while ((via[B] & TACK) == 0)
2476		;
2477	polled_send_byte(v, c);
2478	if (l < 0) {
2479		l = req->nbytes - 1;
2480		polled_send_byte(v, l);
2481	}
2482	for (i = 1; i <= l; ++i)
2483		polled_send_byte(v, req->data[i]);
2484
2485	l = pmu_data_len[c][1];
2486	if (l < 0)
2487		l = polled_recv_byte(v);
2488	for (i = 0; i < l; ++i)
2489		req->reply[i + req->reply_len] = polled_recv_byte(v);
2490
2491	if (req->done)
2492		(*req->done)(req);
2493
2494	local_irq_restore(flags);
2495	return 0;
2496}
2497
2498/* N.B. This doesn't work on the 3400 */
2499void pmu_blink(int n)
2500{
2501	struct adb_request req;
2502
2503	memset(&req, 0, sizeof(req));
2504
2505	for (; n > 0; --n) {
2506		req.nbytes = 4;
2507		req.done = NULL;
2508		req.data[0] = 0xee;
2509		req.data[1] = 4;
2510		req.data[2] = 0;
2511		req.data[3] = 1;
2512		req.reply[0] = ADB_RET_OK;
2513		req.reply_len = 1;
2514		req.reply_expected = 0;
2515		pmu_polled_request(&req);
2516		mdelay(50);
2517		req.nbytes = 4;
2518		req.done = NULL;
2519		req.data[0] = 0xee;
2520		req.data[1] = 4;
2521		req.data[2] = 0;
2522		req.data[3] = 0;
2523		req.reply[0] = ADB_RET_OK;
2524		req.reply_len = 1;
2525		req.reply_expected = 0;
2526		pmu_polled_request(&req);
2527		mdelay(50);
2528	}
2529	mdelay(50);
2530}
2531#endif /* DEBUG_SLEEP */
2532
2533#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2534int pmu_sys_suspended;
2535
2536static int pmu_syscore_suspend(void)
2537{
2538	/* Suspend PMU event interrupts */
2539	pmu_suspend();
2540	pmu_sys_suspended = 1;
2541
2542#ifdef CONFIG_PMAC_BACKLIGHT
2543	/* Tell backlight code not to muck around with the chip anymore */
2544	pmu_backlight_set_sleep(1);
2545#endif
2546
2547	return 0;
2548}
2549
2550static void pmu_syscore_resume(void)
2551{
2552	struct adb_request req;
2553
2554	if (!pmu_sys_suspended)
2555		return;
2556
2557	/* Tell PMU we are ready */
2558	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2559	pmu_wait_complete(&req);
2560
2561#ifdef CONFIG_PMAC_BACKLIGHT
2562	/* Tell backlight code it can use the chip again */
2563	pmu_backlight_set_sleep(0);
2564#endif
2565	/* Resume PMU event interrupts */
2566	pmu_resume();
2567	pmu_sys_suspended = 0;
2568}
2569
2570static struct syscore_ops pmu_syscore_ops = {
2571	.suspend = pmu_syscore_suspend,
2572	.resume = pmu_syscore_resume,
2573};
2574
2575static int pmu_syscore_register(void)
2576{
2577	register_syscore_ops(&pmu_syscore_ops);
2578
2579	return 0;
2580}
2581subsys_initcall(pmu_syscore_register);
2582#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2583
2584EXPORT_SYMBOL(pmu_request);
2585EXPORT_SYMBOL(pmu_queue_request);
2586EXPORT_SYMBOL(pmu_poll);
2587EXPORT_SYMBOL(pmu_poll_adb);
2588EXPORT_SYMBOL(pmu_wait_complete);
2589EXPORT_SYMBOL(pmu_suspend);
2590EXPORT_SYMBOL(pmu_resume);
2591EXPORT_SYMBOL(pmu_unlock);
2592#if defined(CONFIG_PPC32)
2593EXPORT_SYMBOL(pmu_enable_irled);
2594EXPORT_SYMBOL(pmu_battery_count);
2595EXPORT_SYMBOL(pmu_batteries);
2596EXPORT_SYMBOL(pmu_power_flags);
2597#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2598