via-pmu.c 60.1 KB
Newer Older
L
Linus Torvalds 已提交
1 2 3 4 5 6 7 8 9 10 11 12
/*
 * Device driver for the via-pmu on Apple Powermacs.
 *
 * The VIA (versatile interface adapter) interfaces to the PMU,
 * a 6805 microprocessor core whose primary function is to control
 * battery charging and system power on the PowerBook 3400 and 2400.
 * The PMU also controls the ADB (Apple Desktop Bus) which connects
 * to the keyboard and mouse, as well as the non-volatile RAM
 * and the RTC (real time clock) chip.
 *
 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13
 * Copyright (C) 2006-2007 Johannes Berg
L
Linus Torvalds 已提交
14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41
 *
 * THIS DRIVER IS BECOMING A TOTAL MESS !
 *  - Cleanup atomically disabling reply to PMU events after
 *    a sleep or a freq. switch
 *
 */
#include <stdarg.h>
#include <linux/types.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/sched.h>
#include <linux/miscdevice.h>
#include <linux/blkdev.h>
#include <linux/pci.h>
#include <linux/slab.h>
#include <linux/poll.h>
#include <linux/adb.h>
#include <linux/pmu.h>
#include <linux/cuda.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <linux/pm.h>
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <linux/device.h>
#include <linux/sysdev.h>
42
#include <linux/freezer.h>
L
Linus Torvalds 已提交
43
#include <linux/syscalls.h>
44
#include <linux/suspend.h>
L
Linus Torvalds 已提交
45 46 47 48 49 50 51 52 53
#include <linux/cpu.h>
#include <asm/prom.h>
#include <asm/machdep.h>
#include <asm/io.h>
#include <asm/pgtable.h>
#include <asm/system.h>
#include <asm/sections.h>
#include <asm/irq.h>
#include <asm/pmac_feature.h>
54 55
#include <asm/pmac_pfunc.h>
#include <asm/pmac_low_i2c.h>
L
Linus Torvalds 已提交
56 57 58 59 60 61
#include <asm/uaccess.h>
#include <asm/mmu_context.h>
#include <asm/cputable.h>
#include <asm/time.h>
#include <asm/backlight.h>

62 63
#include "via-pmu-event.h"

L
Linus Torvalds 已提交
64
/* Some compile options */
65
#undef DEBUG_SLEEP
L
Linus Torvalds 已提交
66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138

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

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

static volatile unsigned char __iomem *via;

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

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

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

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

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

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

static struct adb_request *current_req;
static struct adb_request *last_req;
static struct adb_request *req_awaiting_reply;
static unsigned char interrupt_data[2][32];
static int interrupt_data_len[2];
static int int_data_last;
static unsigned char *reply_ptr;
static int data_index;
static int data_len;
static volatile int adb_int_pending;
static volatile int disable_poll;
static struct device_node *vias;
static int pmu_kind = PMU_UNKNOWN;
139
static int pmu_fully_inited;
L
Linus Torvalds 已提交
140
static int pmu_has_adb;
141
static struct device_node *gpio_node;
142
static unsigned char __iomem *gpio_reg;
143
static int gpio_irq = NO_IRQ;
L
Linus Torvalds 已提交
144
static int gpio_irq_enabled = -1;
145
static volatile int pmu_suspended;
L
Linus Torvalds 已提交
146 147 148 149
static spinlock_t pmu_lock;
static u8 pmu_intr_mask;
static int pmu_version;
static int drop_interrupts;
150
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
151
static int option_lid_wakeup = 1;
152
#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
L
Linus Torvalds 已提交
153 154 155 156 157 158 159 160 161 162 163
static unsigned long async_req_locks;
static unsigned int pmu_irq_stats[11];

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

int pmu_battery_count;
int pmu_cur_battery;
164
unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
L
Linus Torvalds 已提交
165 166 167 168 169 170 171 172 173
struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
static int query_batt_timer = BATTERY_POLLING_COUNT;
static struct adb_request batt_req;
static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];

int __fake_sleep;
int asleep;

#ifdef CONFIG_ADB
174
static int adb_dev_map;
L
Linus Torvalds 已提交
175 176 177 178 179 180 181 182 183 184 185
static int pmu_adb_flags;

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

static int init_pmu(void);
static void pmu_start(void);
186 187
static irqreturn_t via_pmu_interrupt(int irq, void *arg);
static irqreturn_t gpio1_interrupt(int irq, void *arg);
L
Linus Torvalds 已提交
188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217
static int proc_get_info(char *page, char **start, off_t off,
			  int count, int *eof, void *data);
static int proc_get_irqstats(char *page, char **start, off_t off,
			  int count, int *eof, void *data);
static void pmu_pass_intr(unsigned char *data, int len);
static int proc_get_batt(char *page, char **start, off_t off,
			int count, int *eof, void *data);
static int proc_read_options(char *page, char **start, off_t off,
			int count, int *eof, void *data);
static int proc_write_options(struct file *file, const char __user *buffer,
			unsigned long count, void *data);

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

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

#ifdef DEBUG_SLEEP
int pmu_polled_request(struct adb_request *req);
218
void pmu_blink(int n);
L
Linus Torvalds 已提交
219 220 221 222 223 224 225 226 227
#endif

/*
 * This table indicates for each PMU opcode:
 * - the number of data bytes to be sent with the command, or -1
 *   if a length byte should be sent,
 * - the number of response bytes which the PMU will return, or
 *   -1 if it will send a length byte.
 */
228
static const s8 pmu_data_len[256][2] = {
L
Linus Torvalds 已提交
229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271
/*	   0	   1	   2	   3	   4	   5	   6	   7  */
/*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
/*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
/*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
/*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
/*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
/*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
/*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
/*60*/	{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*68*/	{ 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
/*70*/	{ 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*78*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
/*80*/	{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*88*/	{ 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*90*/	{ 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*98*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*a0*/	{ 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
/*a8*/	{ 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*b0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*b8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*c0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*c8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
/*d0*/	{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*d8*/	{ 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
/*e0*/	{-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
/*e8*/	{ 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
/*f0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
/*f8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
};

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

272
int __init find_via_pmu(void)
L
Linus Torvalds 已提交
273
{
274
	u64 taddr;
275
	const u32 *reg;
276

L
Linus Torvalds 已提交
277 278
	if (via != 0)
		return 1;
279 280
	vias = of_find_node_by_name(NULL, "via-pmu");
	if (vias == NULL)
L
Linus Torvalds 已提交
281 282
		return 0;

283
	reg = of_get_property(vias, "reg", NULL);
284 285 286 287 288
	if (reg == NULL) {
		printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
		goto fail;
	}
	taddr = of_translate_address(vias, reg);
289
	if (taddr == OF_BAD_ADDR) {
290 291
		printk(KERN_ERR "via-pmu: Can't translate address !\n");
		goto fail;
L
Linus Torvalds 已提交
292 293 294 295 296 297 298 299 300 301 302 303
	}

	spin_lock_init(&pmu_lock);

	pmu_has_adb = 1;

	pmu_intr_mask =	PMU_INT_PCEJECT |
			PMU_INT_SNDBRT |
			PMU_INT_ADB |
			PMU_INT_TICK;
	
	if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
304
	    || of_device_is_compatible(vias->parent, "ohare")))
L
Linus Torvalds 已提交
305
		pmu_kind = PMU_OHARE_BASED;
306
	else if (of_device_is_compatible(vias->parent, "paddington"))
L
Linus Torvalds 已提交
307
		pmu_kind = PMU_PADDINGTON_BASED;
308
	else if (of_device_is_compatible(vias->parent, "heathrow"))
L
Linus Torvalds 已提交
309
		pmu_kind = PMU_HEATHROW_BASED;
310 311
	else if (of_device_is_compatible(vias->parent, "Keylargo")
		 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
312
		struct device_node *gpiop;
313
		struct device_node *adbp;
314
		u64 gaddr = OF_BAD_ADDR;
L
Linus Torvalds 已提交
315 316

		pmu_kind = PMU_KEYLARGO_BASED;
317 318 319
		adbp = of_find_node_by_type(NULL, "adb");
		pmu_has_adb = (adbp != NULL);
		of_node_put(adbp);
L
Linus Torvalds 已提交
320 321 322 323 324 325
		pmu_intr_mask =	PMU_INT_PCEJECT |
				PMU_INT_SNDBRT |
				PMU_INT_ADB |
				PMU_INT_TICK |
				PMU_INT_ENVIRONMENT;
		
326 327
		gpiop = of_find_node_by_name(NULL, "gpio");
		if (gpiop) {
328
			reg = of_get_property(gpiop, "reg", NULL);
329 330
			if (reg)
				gaddr = of_translate_address(gpiop, reg);
331
			if (gaddr != OF_BAD_ADDR)
332
				gpio_reg = ioremap(gaddr, 0x10);
L
Linus Torvalds 已提交
333
		}
334
		if (gpio_reg == NULL) {
335
			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
336 337
			goto fail_gpio;
		}
L
Linus Torvalds 已提交
338 339 340
	} else
		pmu_kind = PMU_UNKNOWN;

341 342 343 344 345
	via = ioremap(taddr, 0x2000);
	if (via == NULL) {
		printk(KERN_ERR "via-pmu: Can't map address !\n");
		goto fail;
	}
L
Linus Torvalds 已提交
346 347 348 349 350 351 352 353 354 355 356
	
	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
	out_8(&via[IFR], 0x7f);			/* clear IFR */

	pmu_state = idle;

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

357
	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
L
Linus Torvalds 已提交
358 359 360 361 362
	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
	       
	sys_ctrler = SYS_CTRLER_PMU;
	
	return 1;
363 364
 fail:
	of_node_put(vias);
365 366 367
	iounmap(gpio_reg);
	gpio_reg = NULL;
 fail_gpio:
368 369
	vias = NULL;
	return 0;
L
Linus Torvalds 已提交
370 371 372
}

#ifdef CONFIG_ADB
373
static int pmu_probe(void)
L
Linus Torvalds 已提交
374 375 376 377
{
	return vias == NULL? -ENODEV: 0;
}

378
static int __init pmu_init(void)
L
Linus Torvalds 已提交
379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394
{
	if (vias == NULL)
		return -ENODEV;
	return 0;
}
#endif /* CONFIG_ADB */

/*
 * We can't wait until pmu_init gets called, that happens too late.
 * It happens after IDE and SCSI initialization, which can take a few
 * seconds, and by that time the PMU could have given up on us and
 * turned us off.
 * Thus this is called with arch_initcall rather than device_initcall.
 */
static int __init via_pmu_start(void)
{
395 396
	unsigned int irq;

L
Linus Torvalds 已提交
397 398 399 400 401
	if (vias == NULL)
		return -ENODEV;

	batt_req.complete = 1;

402 403
	irq = irq_of_parse_and_map(vias, 0);
	if (irq == NO_IRQ) {
404
		printk(KERN_ERR "via-pmu: can't map interrupt\n");
405 406 407 408 409
		return -ENODEV;
	}
	if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
		printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
		return -ENODEV;
L
Linus Torvalds 已提交
410 411
	}

412 413 414 415 416
	if (pmu_kind == PMU_KEYLARGO_BASED) {
		gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
		if (gpio_node == NULL)
			gpio_node = of_find_node_by_name(NULL,
							 "pmu-interrupt");
417 418
		if (gpio_node)
			gpio_irq = irq_of_parse_and_map(gpio_node, 0);
419

420
		if (gpio_irq != NO_IRQ) {
421 422 423 424 425 426 427
			if (request_irq(gpio_irq, gpio1_interrupt, 0,
					"GPIO1 ADB", (void *)0))
				printk(KERN_ERR "pmu: can't get irq %d"
				       " (GPIO1)\n", gpio_irq);
			else
				gpio_irq_enabled = 1;
		}
L
Linus Torvalds 已提交
428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460
	}

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

	pmu_fully_inited = 1;

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

	return 0;
}

arch_initcall(via_pmu_start);

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

#ifdef CONFIG_PMAC_BACKLIGHT
461
	/* Initialize backlight */
462
	pmu_backlight_init();
463
#endif
L
Linus Torvalds 已提交
464

465
#ifdef CONFIG_PPC32
L
Linus Torvalds 已提交
466 467 468 469 470 471 472 473 474 475 476 477 478 479 480
  	if (machine_is_compatible("AAPL,3400/2400") ||
  		machine_is_compatible("AAPL,3500")) {
		int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
			NULL, PMAC_MB_INFO_MODEL, 0);
		pmu_battery_count = 1;
		if (mb == PMAC_TYPE_COMET)
			pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
		else
			pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
	} else if (machine_is_compatible("AAPL,PowerBook1998") ||
		machine_is_compatible("PowerBook1,1")) {
		pmu_battery_count = 2;
		pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
		pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
	} else {
481 482
		struct device_node* prim =
			of_find_node_by_name(NULL, "power-mgt");
483
		const u32 *prim_info = NULL;
L
Linus Torvalds 已提交
484
		if (prim)
485
			prim_info = of_get_property(prim, "prim-info", NULL);
L
Linus Torvalds 已提交
486 487 488 489 490 491 492
		if (prim_info) {
			/* Other stuffs here yet unknown */
			pmu_battery_count = (prim_info[6] >> 16) & 0xff;
			pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
			if (pmu_battery_count > 1)
				pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
		}
493
		of_node_put(prim);
L
Linus Torvalds 已提交
494
	}
495 496
#endif /* CONFIG_PPC32 */

L
Linus Torvalds 已提交
497 498 499
	/* Create /proc/pmu */
	proc_pmu_root = proc_mkdir("pmu", NULL);
	if (proc_pmu_root) {
500
		long i;
L
Linus Torvalds 已提交
501 502 503

		for (i=0; i<pmu_battery_count; i++) {
			char title[16];
504
			sprintf(title, "battery_%ld", i);
L
Linus Torvalds 已提交
505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523
			proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
						proc_get_batt, (void *)i);
		}

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

device_initcall(via_pmu_dev_init);

524
static int
L
Linus Torvalds 已提交
525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553
init_pmu(void)
{
	int timeout;
	struct adb_request req;

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

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

	/* ack all pending interrupts */
	timeout = 100000;
	interrupt_data[0][0] = 1;
	while (interrupt_data[0][0] || pmu_state != idle) {
		if (--timeout < 0) {
			printk(KERN_ERR "init_pmu: timed out acking intrs\n");
			return 0;
		}
		if (pmu_state == idle)
			adb_int_pending = 1;
554
		via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617
		udelay(10);
	}

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

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

int
pmu_get_model(void)
{
	return pmu_kind;
}

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

	if (pmu_kind != PMU_KEYLARGO_BASED)
		return;

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

/* This new version of the code for 2400/3400/3500 powerbooks
 * is inspired from the implementation in gkrellm-pmu
 */
618
static void
L
Linus Torvalds 已提交
619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705
done_battery_state_ohare(struct adb_request* req)
{
	/* format:
	 *  [0]    :  flags
	 *    0x01 :  AC indicator
	 *    0x02 :  charging
	 *    0x04 :  battery exist
	 *    0x08 :  
	 *    0x10 :  
	 *    0x20 :  full charged
	 *    0x40 :  pcharge reset
	 *    0x80 :  battery exist
	 *
	 *  [1][2] :  battery voltage
	 *  [3]    :  CPU temperature
	 *  [4]    :  battery temperature
	 *  [5]    :  current
	 *  [6][7] :  pcharge
	 *              --tkoba
	 */
	unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
	long pcharge, charge, vb, vmax, lmax;
	long vmax_charging, vmax_charged;
	long amperage, voltage, time, max;
	int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
			NULL, PMAC_MB_INFO_MODEL, 0);

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

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

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

	clear_bit(0, &async_req_locks);
}

706
static void
L
Linus Torvalds 已提交
707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783
done_battery_state_smart(struct adb_request* req)
{
	/* format:
	 *  [0] : format of this structure (known: 3,4,5)
	 *  [1] : flags
	 *  
	 *  format 3 & 4:
	 *  
	 *  [2] : charge
	 *  [3] : max charge
	 *  [4] : current
	 *  [5] : voltage
	 *  
	 *  format 5:
	 *  
	 *  [2][3] : charge
	 *  [4][5] : max charge
	 *  [6][7] : current
	 *  [8][9] : voltage
	 */
	 
	unsigned int bat_flags = PMU_BATT_TYPE_SMART;
	int amperage;
	unsigned int capa, max, voltage;
	
	if (req->reply[1] & 0x01)
		pmu_power_flags |= PMU_PWR_AC_PRESENT;
	else
		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;


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

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

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

	pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;

	clear_bit(0, &async_req_locks);
}

784
static void
L
Linus Torvalds 已提交
785 786 787 788 789 790 791 792 793 794 795 796
query_battery_state(void)
{
	if (test_and_set_bit(0, &async_req_locks))
		return;
	if (pmu_kind == PMU_OHARE_BASED)
		pmu_request(&batt_req, done_battery_state_ohare,
			1, PMU_BATTERY_STATE);
	else
		pmu_request(&batt_req, done_battery_state_smart,
			2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
}

797
static int
L
Linus Torvalds 已提交
798 799 800 801 802 803 804 805
proc_get_info(char *page, char **start, off_t off,
		int count, int *eof, void *data)
{
	char* p = page;

	p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
	p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
	p += sprintf(p, "AC Power               : %d\n",
806
		((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
L
Linus Torvalds 已提交
807 808 809 810 811
	p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);

	return p - page;
}

812
static int
L
Linus Torvalds 已提交
813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838
proc_get_irqstats(char *page, char **start, off_t off,
		  int count, int *eof, void *data)
{
	int i;
	char* p = page;
	static const char *irq_names[] = {
		"Total CB1 triggered events",
		"Total GPIO1 triggered events",
		"PC-Card eject button",
		"Sound/Brightness button",
		"ADB message",
		"Battery state change",
		"Environment interrupt",
		"Tick timer",
		"Ghost interrupt (zero len)",
		"Empty interrupt (empty mask)",
		"Max irqs in a row"
        };

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

839
static int
L
Linus Torvalds 已提交
840 841 842
proc_get_batt(char *page, char **start, off_t off,
		int count, int *eof, void *data)
{
843
	long batnum = (long)data;
L
Linus Torvalds 已提交
844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862
	char *p = page;
	
	p += sprintf(p, "\n");
	p += sprintf(p, "flags      : %08x\n",
		pmu_batteries[batnum].flags);
	p += sprintf(p, "charge     : %d\n",
		pmu_batteries[batnum].charge);
	p += sprintf(p, "max_charge : %d\n",
		pmu_batteries[batnum].max_charge);
	p += sprintf(p, "current    : %d\n",
		pmu_batteries[batnum].amperage);
	p += sprintf(p, "voltage    : %d\n",
		pmu_batteries[batnum].voltage);
	p += sprintf(p, "time rem.  : %d\n",
		pmu_batteries[batnum].time_remaining);

	return p - page;
}

863
static int
L
Linus Torvalds 已提交
864 865 866 867 868
proc_read_options(char *page, char **start, off_t off,
			int count, int *eof, void *data)
{
	char *p = page;

869
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
870 871 872
	if (pmu_kind == PMU_KEYLARGO_BASED &&
	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
		p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
873
#endif
L
Linus Torvalds 已提交
874 875 876 877 878 879
	if (pmu_kind == PMU_KEYLARGO_BASED)
		p += sprintf(p, "server_mode=%d\n", option_server_mode);

	return p - page;
}
			
880
static int
L
Linus Torvalds 已提交
881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909
proc_write_options(struct file *file, const char __user *buffer,
			unsigned long count, void *data)
{
	char tmp[33];
	char *label, *val;
	unsigned long fcount = count;
	
	if (!count)
		return -EINVAL;
	if (count > 32)
		count = 32;
	if (copy_from_user(tmp, buffer, count))
		return -EFAULT;
	tmp[count] = 0;

	label = tmp;
	while(*label == ' ')
		label++;
	val = label;
	while(*val && (*val != '=')) {
		if (*val == ' ')
			*val = 0;
		val++;
	}
	if ((*val) == 0)
		return -EINVAL;
	*(val++) = 0;
	while(*val == ' ')
		val++;
910
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
911 912 913 914
	if (pmu_kind == PMU_KEYLARGO_BASED &&
	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
		if (!strcmp(label, "lid_wakeup"))
			option_lid_wakeup = ((*val) == '1');
915
#endif
L
Linus Torvalds 已提交
916 917 918 919 920 921 922 923 924 925 926
	if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
		int new_value;
		new_value = ((*val) == '1');
		if (new_value != option_server_mode)
			pmu_set_server_mode(new_value);
	}
	return fcount;
}

#ifdef CONFIG_ADB
/* Send an ADB command */
927
static int
L
Linus Torvalds 已提交
928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 1001 1002 1003 1004 1005 1006
pmu_send_request(struct adb_request *req, int sync)
{
	int i, ret;

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

	ret = -EINVAL;

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

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

	return 0;
}

/* Enable/disable autopolling */
1007
static int
L
Linus Torvalds 已提交
1008 1009 1010 1011 1012 1013 1014 1015 1016 1017 1018 1019 1020 1021 1022 1023 1024 1025 1026 1027 1028 1029
pmu_adb_autopoll(int devs)
{
	struct adb_request req;

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

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

/* Reset the ADB bus */
1030
static int
L
Linus Torvalds 已提交
1031 1032 1033 1034 1035 1036 1037 1038 1039 1040 1041 1042 1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053 1054 1055 1056 1057 1058 1059 1060 1061 1062 1063 1064
pmu_adb_reset_bus(void)
{
	struct adb_request req;
	int save_autopoll = adb_dev_map;

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

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

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

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

	return 0;
}
#endif /* CONFIG_ADB */

/* Construct and send a pmu request */
1065
int
L
Linus Torvalds 已提交
1066 1067 1068 1069 1070 1071 1072 1073 1074 1075 1076 1077 1078 1079 1080 1081 1082 1083 1084 1085 1086 1087 1088 1089 1090
pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
	    int nbytes, ...)
{
	va_list list;
	int i;

	if (vias == NULL)
		return -ENXIO;

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

1091
int
L
Linus Torvalds 已提交
1092 1093 1094 1095 1096 1097 1098 1099 1100 1101 1102 1103 1104 1105 1106 1107 1108 1109 1110 1111 1112 1113 1114 1115 1116 1117 1118 1119 1120 1121 1122 1123 1124 1125 1126 1127 1128 1129 1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182
pmu_queue_request(struct adb_request *req)
{
	unsigned long flags;
	int nsend;

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

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

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

	return 0;
}

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

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

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

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

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

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

1183
static void
L
Linus Torvalds 已提交
1184 1185 1186 1187 1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206
pmu_start(void)
{
	struct adb_request *req;

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

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

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

1207
void
L
Linus Torvalds 已提交
1208 1209 1210 1211 1212 1213
pmu_poll(void)
{
	if (!via)
		return;
	if (disable_poll)
		return;
1214
	via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
1215 1216
}

1217
void
L
Linus Torvalds 已提交
1218 1219 1220 1221 1222 1223 1224 1225 1226
pmu_poll_adb(void)
{
	if (!via)
		return;
	if (disable_poll)
		return;
	/* Kicks ADB read when PMU is suspended */
	adb_int_pending = 1;
	do {
1227
		via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
1228 1229 1230 1231
	} while (pmu_suspended && (adb_int_pending || pmu_state != idle
		|| req_awaiting_reply));
}

1232
void
L
Linus Torvalds 已提交
1233 1234 1235 1236 1237
pmu_wait_complete(struct adb_request *req)
{
	if (!via)
		return;
	while((pmu_state != idle && pmu_state != locked) || !req->complete)
1238
		via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
1239 1240 1241 1242 1243 1244 1245
}

/* This function loops until the PMU is idle and prevents it from
 * anwsering to ADB interrupts. pmu_request can still be called.
 * This is done to avoid spurrious shutdowns when we know we'll have
 * interrupts switched off for a long time
 */
1246
void
L
Linus Torvalds 已提交
1247 1248 1249
pmu_suspend(void)
{
	unsigned long flags;
J
Johannes Berg 已提交
1250

L
Linus Torvalds 已提交
1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261 1262 1263 1264
	if (!via)
		return;
	
	spin_lock_irqsave(&pmu_lock, flags);
	pmu_suspended++;
	if (pmu_suspended > 1) {
		spin_unlock_irqrestore(&pmu_lock, flags);
		return;
	}

	do {
		spin_unlock_irqrestore(&pmu_lock, flags);
		if (req_awaiting_reply)
			adb_int_pending = 1;
1265
		via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
1266 1267 1268 1269 1270 1271 1272 1273 1274 1275 1276
		spin_lock_irqsave(&pmu_lock, flags);
		if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
			if (gpio_irq >= 0)
				disable_irq_nosync(gpio_irq);
			out_8(&via[IER], CB1_INT | IER_CLR);
			spin_unlock_irqrestore(&pmu_lock, flags);
			break;
		}
	} while (1);
}

1277
void
L
Linus Torvalds 已提交
1278 1279 1280 1281 1282 1283 1284 1285 1286 1287 1288 1289 1290 1291 1292 1293 1294 1295 1296 1297 1298 1299
pmu_resume(void)
{
	unsigned long flags;

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

	spin_lock_irqsave(&pmu_lock, flags);
	pmu_suspended--;
	if (pmu_suspended > 0) {
		spin_unlock_irqrestore(&pmu_lock, flags);
		return;
	}
	adb_int_pending = 1;
	if (gpio_irq >= 0)
		enable_irq(gpio_irq);
	out_8(&via[IER], CB1_INT | IER_SET);
	spin_unlock_irqrestore(&pmu_lock, flags);
	pmu_poll();
}

/* Interrupt data could be the result data from an ADB cmd */
1300
static void
1301
pmu_handle_data(unsigned char *data, int len)
L
Linus Torvalds 已提交
1302 1303 1304 1305 1306 1307 1308 1309 1310 1311 1312 1313 1314 1315 1316 1317 1318 1319 1320 1321 1322 1323 1324 1325 1326 1327 1328 1329 1330 1331 1332 1333 1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363 1364 1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375
{
	unsigned char ints, pirq;
	int i = 0;

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

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

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

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

next:

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

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

	/* Note: for some reason, we get an interrupt with len=1,
	 * data[0]==0 after each normal ADB interrupt, at least
	 * on the Pismo. Still investigating...  --BenH
	 */
	if ((1 << pirq) & PMU_INT_ADB) {
		if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
			struct adb_request *req = req_awaiting_reply;
			if (req == 0) {
				printk(KERN_ERR "PMU: extra ADB reply\n");
				return;
			}
			req_awaiting_reply = NULL;
			if (len <= 2)
				req->reply_len = 0;
			else {
				memcpy(req->reply, data + 1, len - 1);
				req->reply_len = len - 1;
			}
			pmu_done(req);
		} else {
			if (len == 4 && data[1] == 0x2c) {
				extern int xmon_wants_key, xmon_adb_keycode;
				if (xmon_wants_key) {
					xmon_adb_keycode = data[2];
					return;
				}
			}
#ifdef CONFIG_ADB
			/*
			 * XXX On the [23]400 the PMU gives us an up
			 * event for keycodes 0x74 or 0x75 when the PC
			 * card eject buttons are released, so we
			 * ignore those events.
			 */
			if (!(pmu_kind == PMU_OHARE_BASED && len == 4
			      && data[1] == 0x2c && data[3] == 0xff
			      && (data[2] & ~1) == 0xf4))
1376
				adb_input(data+1, len-1, 1);
L
Linus Torvalds 已提交
1377 1378 1379 1380 1381 1382 1383
#endif /* CONFIG_ADB */		
		}
	}
	/* Sound/brightness button pressed */
	else if ((1 << pirq) & PMU_INT_SNDBRT) {
#ifdef CONFIG_PMAC_BACKLIGHT
		if (len == 3)
1384 1385
			pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
#endif
L
Linus Torvalds 已提交
1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400
	}
	/* Tick interrupt */
	else if ((1 << pirq) & PMU_INT_TICK) {
		/* Environement or tick interrupt, query batteries */
		if (pmu_battery_count) {
			if ((--query_batt_timer) == 0) {
				query_battery_state();
				query_batt_timer = BATTERY_POLLING_COUNT;
			}
		}
        }
	else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
		if (pmu_battery_count)
			query_battery_state();
		pmu_pass_intr(data, len);
1401 1402 1403 1404 1405 1406
		/* len == 6 is probably a bad check. But how do I
		 * know what PMU versions send what events here? */
		if (len == 6) {
			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
			via_pmu_event(PMU_EVT_LID, data[1]&1);
		}
L
Linus Torvalds 已提交
1407 1408 1409 1410 1411 1412
	} else {
	       pmu_pass_intr(data, len);
	}
	goto next;
}

1413
static struct adb_request*
1414
pmu_sr_intr(void)
L
Linus Torvalds 已提交
1415 1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498
{
	struct adb_request *req;
	int bite = 0;

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

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

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

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

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

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

		if (pmu_state == reading_intr) {
			pmu_state = idle;
			int_data_state[int_data_last] = int_data_ready;
			interrupt_data_len[int_data_last] = data_len;
		} else {
			req = current_req;
			/* 
			 * For PMU sleep and freq change requests, we lock the
J
Jean Delvare 已提交
1499
			 * PMU until it's explicitly unlocked. This avoids any
L
Linus Torvalds 已提交
1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518
			 * spurrious event polling getting in
			 */
			current_req = req->next;
			req->reply_len += data_index;
			if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
				pmu_state = locked;
			else
				pmu_state = idle;
			return req;
		}
		break;

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

1519
static irqreturn_t
1520
via_pmu_interrupt(int irq, void *arg)
L
Linus Torvalds 已提交
1521 1522 1523 1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549
{
	unsigned long flags;
	int intr;
	int nloop = 0;
	int int_data = -1;
	struct adb_request *req = NULL;
	int handled = 0;

	/* This is a bit brutal, we can probably do better */
	spin_lock_irqsave(&pmu_lock, flags);
	++disable_poll;
	
	for (;;) {
		intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
		if (intr == 0)
			break;
		handled = 1;
		if (++nloop > 1000) {
			printk(KERN_DEBUG "PMU: stuck in intr loop, "
			       "intr=%x, ier=%x pmu_state=%d\n",
			       intr, in_8(&via[IER]), pmu_state);
			break;
		}
		out_8(&via[IFR], intr);
		if (intr & CB1_INT) {
			adb_int_pending = 1;
			pmu_irq_stats[0]++;
		}
		if (intr & SR_INT) {
1550
			req = pmu_sr_intr();
L
Linus Torvalds 已提交
1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563 1564 1565 1566 1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594 1595
			if (req)
				break;
		}
	}

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

	/* Deal with completed PMU requests outside of the lock */
	if (req) {
		pmu_done(req);
		req = NULL;
	}
		
	/* Deal with interrupt datas outside of the lock */
	if (int_data >= 0) {
1596
		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
L
Linus Torvalds 已提交
1597 1598 1599 1600 1601 1602 1603 1604 1605 1606
		spin_lock_irqsave(&pmu_lock, flags);
		++disable_poll;
		int_data_state[int_data] = int_data_empty;
		int_data = -1;
		goto recheck;
	}

	return IRQ_RETVAL(handled);
}

1607
void
L
Linus Torvalds 已提交
1608 1609 1610 1611 1612 1613 1614 1615 1616 1617 1618 1619
pmu_unlock(void)
{
	unsigned long flags;

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


1620
static irqreturn_t
1621
gpio1_interrupt(int irq, void *arg)
L
Linus Torvalds 已提交
1622 1623 1624 1625 1626 1627 1628 1629 1630 1631 1632 1633
{
	unsigned long flags;

	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
		spin_lock_irqsave(&pmu_lock, flags);
		if (gpio_irq_enabled > 0) {
			disable_irq_nosync(gpio_irq);
			gpio_irq_enabled = 0;
		}
		pmu_irq_stats[1]++;
		adb_int_pending = 1;
		spin_unlock_irqrestore(&pmu_lock, flags);
1634
		via_pmu_interrupt(0, NULL);
L
Linus Torvalds 已提交
1635 1636 1637 1638 1639
		return IRQ_HANDLED;
	}
	return IRQ_NONE;
}

1640
void
L
Linus Torvalds 已提交
1641 1642 1643 1644 1645 1646 1647 1648 1649 1650 1651 1652 1653 1654
pmu_enable_irled(int on)
{
	struct adb_request req;

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

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

1655
void
L
Linus Torvalds 已提交
1656 1657 1658 1659 1660 1661 1662 1663 1664 1665 1666 1667 1668 1669 1670 1671 1672 1673 1674 1675 1676 1677 1678 1679
pmu_restart(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

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

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

1680
void
L
Linus Torvalds 已提交
1681 1682 1683 1684 1685 1686 1687 1688 1689 1690 1691 1692 1693 1694 1695 1696 1697 1698 1699 1700 1701 1702 1703 1704 1705 1706 1707 1708 1709 1710 1711 1712 1713 1714 1715
pmu_shutdown(void)
{
	struct adb_request req;

	if (via == NULL)
		return;

	local_irq_disable();

	drop_interrupts = 1;

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

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

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

1716
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
1717 1718 1719 1720
/*
 * Put the powerbook to sleep.
 */
 
1721
static u32 save_via[8];
L
Linus Torvalds 已提交
1722

1723
static void
L
Linus Torvalds 已提交
1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734
save_via_state(void)
{
	save_via[0] = in_8(&via[ANH]);
	save_via[1] = in_8(&via[DIRA]);
	save_via[2] = in_8(&via[B]);
	save_via[3] = in_8(&via[DIRB]);
	save_via[4] = in_8(&via[PCR]);
	save_via[5] = in_8(&via[ACR]);
	save_via[6] = in_8(&via[T1CL]);
	save_via[7] = in_8(&via[T1CH]);
}
1735
static void
L
Linus Torvalds 已提交
1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755
restore_via_state(void)
{
	out_8(&via[ANH], save_via[0]);
	out_8(&via[DIRA], save_via[1]);
	out_8(&via[B], save_via[2]);
	out_8(&via[DIRB], save_via[3]);
	out_8(&via[PCR], save_via[4]);
	out_8(&via[ACR], save_via[5]);
	out_8(&via[T1CL], save_via[6]);
	out_8(&via[T1CH], save_via[7]);
	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
	out_8(&via[IFR], 0x7f);				/* clear IFR */
	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
}

#define	GRACKLE_PM	(1<<7)
#define GRACKLE_DOZE	(1<<5)
#define	GRACKLE_NAP	(1<<4)
#define	GRACKLE_SLEEP	(1<<3)

1756
static int powerbook_sleep_grackle(void)
L
Linus Torvalds 已提交
1757 1758 1759 1760 1761 1762
{
	unsigned long save_l2cr;
	unsigned short pmcr1;
	struct adb_request req;
	struct pci_dev *grackle;

1763
	grackle = pci_get_bus_and_slot(0, 0);
L
Linus Torvalds 已提交
1764 1765 1766 1767 1768 1769 1770 1771 1772 1773 1774 1775 1776 1777 1778 1779 1780 1781 1782 1783 1784 1785 1786 1787 1788 1789 1790 1791 1792 1793 1794 1795 1796 1797 1798 1799 1800 1801 1802 1803 1804
	if (!grackle)
		return -ENODEV;

	/* Turn off various things. Darwin does some retry tests here... */
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
		PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
	pmu_wait_complete(&req);

	/* For 750, save backside cache setting and disable it */
	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */

	if (!__fake_sleep) {
		/* Ask the PMU to put us to sleep */
		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
		pmu_wait_complete(&req);
	}

	/* The VIA is supposed not to be restored correctly*/
	save_via_state();
	/* We shut down some HW */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);

	pci_read_config_word(grackle, 0x70, &pmcr1);
	/* Apparently, MacOS uses NAP mode for Grackle ??? */
	pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
	pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
	pci_write_config_word(grackle, 0x70, pmcr1);

	/* Call low-level ASM sleep handler */
	if (__fake_sleep)
		mdelay(5000);
	else
		low_sleep_handler();

	/* We're awake again, stop grackle PM */
	pci_read_config_word(grackle, 0x70, &pmcr1);
	pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
	pci_write_config_word(grackle, 0x70, pmcr1);

1805 1806
	pci_dev_put(grackle);

L
Linus Torvalds 已提交
1807 1808 1809 1810 1811 1812 1813 1814 1815
	/* Make sure the PMU is idle */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
	restore_via_state();
	
	/* Restore L2 cache */
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
 		_set_L2CR(save_l2cr);
	
	/* Restore userland MMU context */
1816
	set_context(current->active_mm->context.id, current->active_mm->pgd);
L
Linus Torvalds 已提交
1817 1818 1819 1820 1821 1822 1823 1824 1825 1826 1827 1828 1829 1830 1831

	/* Power things up */
	pmu_unlock();
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
			PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
			PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
	pmu_wait_complete(&req);

	return 0;
}

1832
static int
L
Linus Torvalds 已提交
1833 1834 1835 1836 1837 1838 1839 1840 1841 1842 1843 1844 1845 1846
powerbook_sleep_Core99(void)
{
	unsigned long save_l2cr;
	unsigned long save_l3cr;
	struct adb_request req;
	
	if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
		printk(KERN_ERR "Sleep mode not supported on this machine\n");
		return -ENOSYS;
	}

	if (num_online_cpus() > 1 || cpu_is_offline(0))
		return -EAGAIN;

1847 1848 1849
	/* Stop environment and ADB interrupts */
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
	pmu_wait_complete(&req);
L
Linus Torvalds 已提交
1850 1851 1852 1853 1854 1855 1856 1857 1858 1859 1860 1861 1862 1863 1864 1865 1866 1867 1868 1869 1870 1871 1872 1873 1874 1875 1876 1877 1878 1879 1880 1881 1882 1883 1884 1885 1886 1887 1888 1889 1890

	/* Tell PMU what events will wake us up */
	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
		0xff, 0xff);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
		0, PMU_PWR_WAKEUP_KEY |
		(option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
	pmu_wait_complete(&req);

	/* Save the state of the L2 and L3 caches */
	save_l3cr = _get_L3CR();	/* (returns -1 if not available) */
	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */

	if (!__fake_sleep) {
		/* Ask the PMU to put us to sleep */
		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
		pmu_wait_complete(&req);
	}

	/* The VIA is supposed not to be restored correctly*/
	save_via_state();

	/* Shut down various ASICs. There's a chance that we can no longer
	 * talk to the PMU after this, so I moved it to _after_ sending the
	 * sleep command to it. Still need to be checked.
	 */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);

	/* Call low-level ASM sleep handler */
	if (__fake_sleep)
		mdelay(5000);
	else
		low_sleep_handler();

	/* Restore Apple core ASICs state */
	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);

	/* Restore VIA */
	restore_via_state();

1891 1892 1893
	/* tweak LPJ before cpufreq is there */
	loops_per_jiffy *= 2;

L
Linus Torvalds 已提交
1894 1895 1896 1897 1898 1899 1900 1901 1902 1903 1904
	/* Restore video */
	pmac_call_early_video_resume();

	/* Restore L2 cache */
	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
 		_set_L2CR(save_l2cr);
	/* Restore L3 cache */
	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
 		_set_L3CR(save_l3cr);
	
	/* Restore userland MMU context */
1905
	set_context(current->active_mm->context.id, current->active_mm->pgd);
L
Linus Torvalds 已提交
1906 1907 1908 1909 1910 1911 1912 1913

	/* Tell PMU we are ready */
	pmu_unlock();
	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
	pmu_wait_complete(&req);
	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
	pmu_wait_complete(&req);

1914 1915 1916
	/* Restore LPJ, cpufreq will adjust the cpu frequency */
	loops_per_jiffy /= 2;

L
Linus Torvalds 已提交
1917 1918 1919 1920 1921 1922
	return 0;
}

#define PB3400_MEM_CTRL		0xf8000000
#define PB3400_MEM_CTRL_SLEEP	0x70

1923 1924 1925 1926 1927 1928 1929 1930 1931 1932 1933
static void __iomem *pb3400_mem_ctrl;

static void powerbook_sleep_init_3400(void)
{
	/* map in the memory controller registers */
	pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
	if (pb3400_mem_ctrl == NULL)
		printk(KERN_WARNING "ioremap failed: sleep won't be possible");
}

static int powerbook_sleep_3400(void)
L
Linus Torvalds 已提交
1934
{
1935
	int i, x;
L
Linus Torvalds 已提交
1936
	unsigned int hid0;
1937
	unsigned long msr;
L
Linus Torvalds 已提交
1938 1939 1940
	struct adb_request sleep_req;
	unsigned int __iomem *mem_ctrl_sleep;

1941
	if (pb3400_mem_ctrl == NULL)
L
Linus Torvalds 已提交
1942
		return -ENOMEM;
1943
	mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
L
Linus Torvalds 已提交
1944 1945 1946 1947 1948 1949 1950 1951 1952 1953 1954 1955 1956 1957

	/* Set the memory controller to keep the memory refreshed
	   while we're asleep */
	for (i = 0x403f; i >= 0x4000; --i) {
		out_be32(mem_ctrl_sleep, i);
		do {
			x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
		} while (x == 0);
		if (x >= 0x100)
			break;
	}

	/* Ask the PMU to put us to sleep */
	pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1958 1959
	pmu_wait_complete(&sleep_req);
	pmu_unlock();
L
Linus Torvalds 已提交
1960

1961
	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
L
Linus Torvalds 已提交
1962 1963 1964 1965

	asleep = 1;

	/* Put the CPU into sleep mode */
1966
	hid0 = mfspr(SPRN_HID0);
L
Linus Torvalds 已提交
1967
	hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1968
	mtspr(SPRN_HID0, hid0);
1969 1970 1971 1972 1973 1974 1975 1976
	local_irq_enable();
	msr = mfmsr() | MSR_POW;
	while (asleep) {
		mb();
		mtmsr(msr);
		isync();
	}
	local_irq_disable();
L
Linus Torvalds 已提交
1977 1978 1979

	/* OK, we're awake again, start restoring things */
	out_be32(mem_ctrl_sleep, 0x3f);
1980
	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
L
Linus Torvalds 已提交
1981 1982 1983 1984

	return 0;
}

1985
#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
1986

L
Linus Torvalds 已提交
1987 1988 1989 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999 2000 2001 2002
/*
 * Support for /dev/pmu device
 */
#define RB_SIZE		0x10
struct pmu_private {
	struct list_head list;
	int	rb_get;
	int	rb_put;
	struct rb_entry {
		unsigned short len;
		unsigned char data[16];
	}	rb_buf[RB_SIZE];
	wait_queue_head_t wait;
	spinlock_t lock;
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
	int	backlight_locker;
2003
#endif
L
Linus Torvalds 已提交
2004 2005 2006
};

static LIST_HEAD(all_pmu_pvt);
2007
static DEFINE_SPINLOCK(all_pvt_lock);
L
Linus Torvalds 已提交
2008

2009
static void
L
Linus Torvalds 已提交
2010 2011 2012 2013 2014 2015 2016 2017 2018 2019 2020 2021 2022 2023 2024 2025 2026 2027 2028 2029 2030 2031 2032 2033 2034 2035 2036 2037
pmu_pass_intr(unsigned char *data, int len)
{
	struct pmu_private *pp;
	struct list_head *list;
	int i;
	unsigned long flags;

	if (len > sizeof(pp->rb_buf[0].data))
		len = sizeof(pp->rb_buf[0].data);
	spin_lock_irqsave(&all_pvt_lock, flags);
	for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
		pp = list_entry(list, struct pmu_private, list);
		spin_lock(&pp->lock);
		i = pp->rb_put + 1;
		if (i >= RB_SIZE)
			i = 0;
		if (i != pp->rb_get) {
			struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
			rp->len = len;
			memcpy(rp->data, data, len);
			pp->rb_put = i;
			wake_up_interruptible(&pp->wait);
		}
		spin_unlock(&pp->lock);
	}
	spin_unlock_irqrestore(&all_pvt_lock, flags);
}

2038
static int
L
Linus Torvalds 已提交
2039 2040 2041 2042 2043 2044 2045 2046 2047 2048 2049 2050 2051 2052
pmu_open(struct inode *inode, struct file *file)
{
	struct pmu_private *pp;
	unsigned long flags;

	pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
	if (pp == 0)
		return -ENOMEM;
	pp->rb_get = pp->rb_put = 0;
	spin_lock_init(&pp->lock);
	init_waitqueue_head(&pp->wait);
	spin_lock_irqsave(&all_pvt_lock, flags);
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
	pp->backlight_locker = 0;
2053
#endif
L
Linus Torvalds 已提交
2054 2055 2056 2057 2058 2059
	list_add(&pp->list, &all_pmu_pvt);
	spin_unlock_irqrestore(&all_pvt_lock, flags);
	file->private_data = pp;
	return 0;
}

2060
static ssize_t 
L
Linus Torvalds 已提交
2061 2062 2063 2064 2065 2066 2067 2068 2069 2070 2071 2072 2073 2074 2075 2076 2077 2078 2079 2080 2081 2082 2083 2084 2085 2086 2087 2088 2089 2090 2091 2092 2093 2094 2095 2096 2097 2098 2099 2100 2101 2102 2103 2104 2105 2106 2107 2108 2109 2110 2111
pmu_read(struct file *file, char __user *buf,
			size_t count, loff_t *ppos)
{
	struct pmu_private *pp = file->private_data;
	DECLARE_WAITQUEUE(wait, current);
	unsigned long flags;
	int ret = 0;

	if (count < 1 || pp == 0)
		return -EINVAL;
	if (!access_ok(VERIFY_WRITE, buf, count))
		return -EFAULT;

	spin_lock_irqsave(&pp->lock, flags);
	add_wait_queue(&pp->wait, &wait);
	current->state = TASK_INTERRUPTIBLE;

	for (;;) {
		ret = -EAGAIN;
		if (pp->rb_get != pp->rb_put) {
			int i = pp->rb_get;
			struct rb_entry *rp = &pp->rb_buf[i];
			ret = rp->len;
			spin_unlock_irqrestore(&pp->lock, flags);
			if (ret > count)
				ret = count;
			if (ret > 0 && copy_to_user(buf, rp->data, ret))
				ret = -EFAULT;
			if (++i >= RB_SIZE)
				i = 0;
			spin_lock_irqsave(&pp->lock, flags);
			pp->rb_get = i;
		}
		if (ret >= 0)
			break;
		if (file->f_flags & O_NONBLOCK)
			break;
		ret = -ERESTARTSYS;
		if (signal_pending(current))
			break;
		spin_unlock_irqrestore(&pp->lock, flags);
		schedule();
		spin_lock_irqsave(&pp->lock, flags);
	}
	current->state = TASK_RUNNING;
	remove_wait_queue(&pp->wait, &wait);
	spin_unlock_irqrestore(&pp->lock, flags);
	
	return ret;
}

2112
static ssize_t
L
Linus Torvalds 已提交
2113 2114 2115 2116 2117 2118
pmu_write(struct file *file, const char __user *buf,
			 size_t count, loff_t *ppos)
{
	return 0;
}

2119
static unsigned int
L
Linus Torvalds 已提交
2120 2121 2122 2123 2124 2125 2126 2127 2128 2129 2130 2131 2132 2133 2134 2135
pmu_fpoll(struct file *filp, poll_table *wait)
{
	struct pmu_private *pp = filp->private_data;
	unsigned int mask = 0;
	unsigned long flags;
	
	if (pp == 0)
		return 0;
	poll_wait(filp, &pp->wait, wait);
	spin_lock_irqsave(&pp->lock, flags);
	if (pp->rb_get != pp->rb_put)
		mask |= POLLIN;
	spin_unlock_irqrestore(&pp->lock, flags);
	return mask;
}

2136
static int
L
Linus Torvalds 已提交
2137 2138 2139 2140 2141 2142 2143 2144 2145 2146
pmu_release(struct inode *inode, struct file *file)
{
	struct pmu_private *pp = file->private_data;
	unsigned long flags;

	if (pp != 0) {
		file->private_data = NULL;
		spin_lock_irqsave(&all_pvt_lock, flags);
		list_del(&pp->list);
		spin_unlock_irqrestore(&all_pvt_lock, flags);
2147

L
Linus Torvalds 已提交
2148
#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2149 2150 2151 2152
		if (pp->backlight_locker)
			pmac_backlight_enable();
#endif

L
Linus Torvalds 已提交
2153 2154 2155 2156 2157
		kfree(pp);
	}
	return 0;
}

2158
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2159
static void pmac_suspend_disable_irqs(void)
2160 2161 2162 2163 2164 2165 2166 2167 2168 2169 2170 2171 2172 2173 2174 2175 2176 2177 2178 2179 2180 2181 2182 2183 2184 2185 2186 2187 2188 2189 2190 2191 2192 2193 2194 2195 2196 2197 2198 2199 2200 2201 2202 2203 2204 2205 2206
{
	/* Call platform functions marked "on sleep" */
	pmac_pfunc_i2c_suspend();
	pmac_pfunc_base_suspend();
}

static int powerbook_sleep(suspend_state_t state)
{
	int error = 0;

	/* Wait for completion of async requests */
	while (!batt_req.complete)
		pmu_poll();

	/* Giveup the lazy FPU & vec so we don't have to back them
	 * up from the low level code
	 */
	enable_kernel_fp();

#ifdef CONFIG_ALTIVEC
	if (cpu_has_feature(CPU_FTR_ALTIVEC))
		enable_kernel_altivec();
#endif /* CONFIG_ALTIVEC */

	switch (pmu_kind) {
	case PMU_OHARE_BASED:
		error = powerbook_sleep_3400();
		break;
	case PMU_HEATHROW_BASED:
	case PMU_PADDINGTON_BASED:
		error = powerbook_sleep_grackle();
		break;
	case PMU_KEYLARGO_BASED:
		error = powerbook_sleep_Core99();
		break;
	default:
		return -ENOSYS;
	}

	if (error)
		return error;

	mdelay(100);

	return 0;
}

2207
static void pmac_suspend_enable_irqs(void)
2208 2209 2210 2211 2212 2213 2214 2215 2216 2217 2218 2219 2220 2221 2222 2223 2224 2225 2226 2227 2228 2229 2230 2231 2232
{
	/* Force a poll of ADB interrupts */
	adb_int_pending = 1;
	via_pmu_interrupt(0, NULL);

	mdelay(10);

	/* Call platform functions marked "on wake" */
	pmac_pfunc_base_resume();
	pmac_pfunc_i2c_resume();
}

static int pmu_sleep_valid(suspend_state_t state)
{
	return state == PM_SUSPEND_MEM
		&& (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
}

static struct platform_suspend_ops pmu_pm_ops = {
	.enter = powerbook_sleep,
	.valid = pmu_sleep_valid,
};

static int register_pmu_pm_ops(void)
{
2233 2234 2235 2236
	if (pmu_kind == PMU_OHARE_BASED)
		powerbook_sleep_init_3400();
	ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
	ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2237 2238 2239 2240 2241 2242 2243 2244
	suspend_set_ops(&pmu_pm_ops);

	return 0;
}

device_initcall(register_pmu_pm_ops);
#endif

2245
static int
L
Linus Torvalds 已提交
2246 2247 2248 2249
pmu_ioctl(struct inode * inode, struct file *filp,
		     u_int cmd, u_long arg)
{
	__u32 __user *argp = (__u32 __user *)arg;
2250
	int error = -EINVAL;
L
Linus Torvalds 已提交
2251 2252 2253 2254 2255

	switch (cmd) {
	case PMU_IOC_SLEEP:
		if (!capable(CAP_SYS_ADMIN))
			return -EACCES;
2256
		return pm_suspend(PM_SUSPEND_MEM);
L
Linus Torvalds 已提交
2257
	case PMU_IOC_CAN_SLEEP:
2258
		if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
L
Linus Torvalds 已提交
2259 2260 2261 2262
			return put_user(0, argp);
		else
			return put_user(1, argp);

2263 2264
#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
	/* Compatibility ioctl's for backlight */
L
Linus Torvalds 已提交
2265
	case PMU_IOC_GET_BACKLIGHT:
2266 2267 2268 2269 2270 2271 2272 2273 2274 2275
	{
		int brightness;

		brightness = pmac_backlight_get_legacy_brightness();
		if (brightness < 0)
			return brightness;
		else
			return put_user(brightness, argp);

	}
L
Linus Torvalds 已提交
2276 2277
	case PMU_IOC_SET_BACKLIGHT:
	{
2278 2279 2280 2281 2282 2283 2284
		int brightness;

		error = get_user(brightness, argp);
		if (error)
			return error;

		return pmac_backlight_set_legacy_brightness(brightness);
L
Linus Torvalds 已提交
2285 2286 2287
	}
#ifdef CONFIG_INPUT_ADBHID
	case PMU_IOC_GRAB_BACKLIGHT: {
2288 2289
		struct pmu_private *pp = filp->private_data;

L
Linus Torvalds 已提交
2290 2291
		if (pp->backlight_locker)
			return 0;
2292

L
Linus Torvalds 已提交
2293
		pp->backlight_locker = 1;
2294 2295
		pmac_backlight_disable();

L
Linus Torvalds 已提交
2296 2297 2298
		return 0;
	}
#endif /* CONFIG_INPUT_ADBHID */
2299
#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2300

L
Linus Torvalds 已提交
2301 2302 2303 2304 2305
	case PMU_IOC_GET_MODEL:
	    	return put_user(pmu_kind, argp);
	case PMU_IOC_HAS_ADB:
		return put_user(pmu_has_adb, argp);
	}
2306
	return error;
L
Linus Torvalds 已提交
2307 2308
}

2309
static const struct file_operations pmu_device_fops = {
L
Linus Torvalds 已提交
2310 2311 2312 2313 2314 2315 2316 2317
	.read		= pmu_read,
	.write		= pmu_write,
	.poll		= pmu_fpoll,
	.ioctl		= pmu_ioctl,
	.open		= pmu_open,
	.release	= pmu_release,
};

2318
static struct miscdevice pmu_device = {
L
Linus Torvalds 已提交
2319 2320 2321
	PMU_MINOR, "pmu", &pmu_device_fops
};

2322
static int pmu_device_init(void)
L
Linus Torvalds 已提交
2323 2324
{
	if (!via)
2325
		return 0;
L
Linus Torvalds 已提交
2326 2327
	if (misc_register(&pmu_device) < 0)
		printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2328
	return 0;
L
Linus Torvalds 已提交
2329
}
2330 2331
device_initcall(pmu_device_init);

L
Linus Torvalds 已提交
2332 2333

#ifdef DEBUG_SLEEP
2334
static inline void 
L
Linus Torvalds 已提交
2335 2336 2337 2338 2339 2340 2341 2342 2343 2344
polled_handshake(volatile unsigned char __iomem *via)
{
	via[B] &= ~TREQ; eieio();
	while ((via[B] & TACK) != 0)
		;
	via[B] |= TREQ; eieio();
	while ((via[B] & TACK) == 0)
		;
}

2345
static inline void 
L
Linus Torvalds 已提交
2346 2347 2348 2349 2350 2351 2352
polled_send_byte(volatile unsigned char __iomem *via, int x)
{
	via[ACR] |= SR_OUT | SR_EXT; eieio();
	via[SR] = x; eieio();
	polled_handshake(via);
}

2353
static inline int
L
Linus Torvalds 已提交
2354 2355 2356 2357 2358 2359 2360 2361 2362 2363 2364
polled_recv_byte(volatile unsigned char __iomem *via)
{
	int x;

	via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
	x = via[SR]; eieio();
	polled_handshake(via);
	x = via[SR]; eieio();
	return x;
}

2365
int
L
Linus Torvalds 已提交
2366 2367 2368 2369 2370 2371 2372 2373 2374 2375 2376 2377 2378 2379 2380 2381 2382 2383 2384 2385 2386 2387 2388 2389 2390 2391 2392 2393 2394 2395 2396 2397 2398 2399 2400 2401 2402 2403 2404
pmu_polled_request(struct adb_request *req)
{
	unsigned long flags;
	int i, l, c;
	volatile unsigned char __iomem *v = via;

	req->complete = 1;
	c = req->data[0];
	l = pmu_data_len[c][0];
	if (l >= 0 && req->nbytes != l + 1)
		return -EINVAL;

	local_irq_save(flags);
	while (pmu_state != idle)
		pmu_poll();

	while ((via[B] & TACK) == 0)
		;
	polled_send_byte(v, c);
	if (l < 0) {
		l = req->nbytes - 1;
		polled_send_byte(v, l);
	}
	for (i = 1; i <= l; ++i)
		polled_send_byte(v, req->data[i]);

	l = pmu_data_len[c][1];
	if (l < 0)
		l = polled_recv_byte(v);
	for (i = 0; i < l; ++i)
		req->reply[i + req->reply_len] = polled_recv_byte(v);

	if (req->done)
		(*req->done)(req);

	local_irq_restore(flags);
	return 0;
}

2405 2406 2407 2408
/* N.B. This doesn't work on the 3400 */
void pmu_blink(int n)
{
	struct adb_request req;
L
Linus Torvalds 已提交
2409

2410
	memset(&req, 0, sizeof(req));
L
Linus Torvalds 已提交
2411

2412 2413 2414 2415 2416 2417 2418 2419 2420 2421 2422 2423 2424 2425 2426 2427 2428 2429 2430 2431 2432 2433 2434 2435 2436 2437 2438
	for (; n > 0; --n) {
		req.nbytes = 4;
		req.done = NULL;
		req.data[0] = 0xee;
		req.data[1] = 4;
		req.data[2] = 0;
		req.data[3] = 1;
		req.reply[0] = ADB_RET_OK;
		req.reply_len = 1;
		req.reply_expected = 0;
		pmu_polled_request(&req);
		mdelay(50);
		req.nbytes = 4;
		req.done = NULL;
		req.data[0] = 0xee;
		req.data[1] = 4;
		req.data[2] = 0;
		req.data[3] = 0;
		req.reply[0] = ADB_RET_OK;
		req.reply_len = 1;
		req.reply_expected = 0;
		pmu_polled_request(&req);
		mdelay(50);
	}
	mdelay(50);
}
#endif /* DEBUG_SLEEP */
L
Linus Torvalds 已提交
2439

2440
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2441
int pmu_sys_suspended;
L
Linus Torvalds 已提交
2442

2443
static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
L
Linus Torvalds 已提交
2444
{
2445
	if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
L
Linus Torvalds 已提交
2446 2447
		return 0;

2448
	/* Suspend PMU event interrupts */\
L
Linus Torvalds 已提交
2449 2450
	pmu_suspend();
	pmu_sys_suspended = 1;
2451 2452 2453 2454 2455 2456

#ifdef CONFIG_PMAC_BACKLIGHT
	/* Tell backlight code not to muck around with the chip anymore */
	pmu_backlight_set_sleep(1);
#endif

L
Linus Torvalds 已提交
2457 2458 2459 2460 2461 2462 2463 2464 2465 2466 2467 2468 2469 2470
	return 0;
}

static int pmu_sys_resume(struct sys_device *sysdev)
{
	struct adb_request req;

	if (!pmu_sys_suspended)
		return 0;

	/* Tell PMU we are ready */
	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
	pmu_wait_complete(&req);

2471 2472 2473 2474
#ifdef CONFIG_PMAC_BACKLIGHT
	/* Tell backlight code it can use the chip again */
	pmu_backlight_set_sleep(0);
#endif
L
Linus Torvalds 已提交
2475 2476 2477 2478 2479 2480 2481
	/* Resume PMU event interrupts */
	pmu_resume();
	pmu_sys_suspended = 0;

	return 0;
}

2482
#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
L
Linus Torvalds 已提交
2483 2484

static struct sysdev_class pmu_sysclass = {
2485
	.name = "pmu",
L
Linus Torvalds 已提交
2486 2487 2488 2489 2490 2491 2492
};

static struct sys_device device_pmu = {
	.cls		= &pmu_sysclass,
};

static struct sysdev_driver driver_pmu = {
2493
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
2494 2495
	.suspend	= &pmu_sys_suspend,
	.resume		= &pmu_sys_resume,
2496
#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
L
Linus Torvalds 已提交
2497 2498 2499 2500 2501 2502 2503 2504 2505 2506 2507 2508 2509 2510 2511 2512 2513 2514 2515 2516 2517 2518 2519 2520 2521 2522 2523
};

static int __init init_pmu_sysfs(void)
{
	int rc;

	rc = sysdev_class_register(&pmu_sysclass);
	if (rc) {
		printk(KERN_ERR "Failed registering PMU sys class\n");
		return -ENODEV;
	}
	rc = sysdev_register(&device_pmu);
	if (rc) {
		printk(KERN_ERR "Failed registering PMU sys device\n");
		return -ENODEV;
	}
	rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
	if (rc) {
		printk(KERN_ERR "Failed registering PMU sys driver\n");
		return -ENODEV;
	}
	return 0;
}

subsys_initcall(init_pmu_sysfs);

EXPORT_SYMBOL(pmu_request);
2524
EXPORT_SYMBOL(pmu_queue_request);
L
Linus Torvalds 已提交
2525 2526 2527 2528 2529 2530
EXPORT_SYMBOL(pmu_poll);
EXPORT_SYMBOL(pmu_poll_adb);
EXPORT_SYMBOL(pmu_wait_complete);
EXPORT_SYMBOL(pmu_suspend);
EXPORT_SYMBOL(pmu_resume);
EXPORT_SYMBOL(pmu_unlock);
2531
#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
L
Linus Torvalds 已提交
2532 2533 2534 2535
EXPORT_SYMBOL(pmu_enable_irled);
EXPORT_SYMBOL(pmu_battery_count);
EXPORT_SYMBOL(pmu_batteries);
EXPORT_SYMBOL(pmu_power_flags);
2536
#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
L
Linus Torvalds 已提交
2537