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