xref: /openbmc/linux/drivers/macintosh/via-pmu.c (revision 94cdda6b)
1 /*
2  * Device driver for the via-pmu on Apple Powermacs.
3  *
4  * The VIA (versatile interface adapter) interfaces to the PMU,
5  * a 6805 microprocessor core whose primary function is to control
6  * battery charging and system power on the PowerBook 3400 and 2400.
7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
8  * to the keyboard and mouse, as well as the non-volatile RAM
9  * and the RTC (real time clock) chip.
10  *
11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13  * Copyright (C) 2006-2007 Johannes Berg
14  *
15  * THIS DRIVER IS BECOMING A TOTAL MESS !
16  *  - Cleanup atomically disabling reply to PMU events after
17  *    a sleep or a freq. switch
18  *
19  */
20 #include <stdarg.h>
21 #include <linux/mutex.h>
22 #include <linux/types.h>
23 #include <linux/errno.h>
24 #include <linux/kernel.h>
25 #include <linux/delay.h>
26 #include <linux/sched.h>
27 #include <linux/miscdevice.h>
28 #include <linux/blkdev.h>
29 #include <linux/pci.h>
30 #include <linux/slab.h>
31 #include <linux/poll.h>
32 #include <linux/adb.h>
33 #include <linux/pmu.h>
34 #include <linux/cuda.h>
35 #include <linux/module.h>
36 #include <linux/spinlock.h>
37 #include <linux/pm.h>
38 #include <linux/proc_fs.h>
39 #include <linux/seq_file.h>
40 #include <linux/init.h>
41 #include <linux/interrupt.h>
42 #include <linux/device.h>
43 #include <linux/syscore_ops.h>
44 #include <linux/freezer.h>
45 #include <linux/syscalls.h>
46 #include <linux/suspend.h>
47 #include <linux/cpu.h>
48 #include <linux/compat.h>
49 #include <linux/of_address.h>
50 #include <linux/of_irq.h>
51 #include <asm/prom.h>
52 #include <asm/machdep.h>
53 #include <asm/io.h>
54 #include <asm/pgtable.h>
55 #include <asm/sections.h>
56 #include <asm/irq.h>
57 #include <asm/pmac_feature.h>
58 #include <asm/pmac_pfunc.h>
59 #include <asm/pmac_low_i2c.h>
60 #include <asm/uaccess.h>
61 #include <asm/mmu_context.h>
62 #include <asm/cputable.h>
63 #include <asm/time.h>
64 #include <asm/backlight.h>
65 
66 #include "via-pmu-event.h"
67 
68 /* Some compile options */
69 #undef DEBUG_SLEEP
70 
71 /* Misc minor number allocated for /dev/pmu */
72 #define PMU_MINOR		154
73 
74 /* How many iterations between battery polls */
75 #define BATTERY_POLLING_COUNT	2
76 
77 static DEFINE_MUTEX(pmu_info_proc_mutex);
78 static volatile unsigned char __iomem *via;
79 
80 /* VIA registers - spaced 0x200 bytes apart */
81 #define RS		0x200		/* skip between registers */
82 #define B		0		/* B-side data */
83 #define A		RS		/* A-side data */
84 #define DIRB		(2*RS)		/* B-side direction (1=output) */
85 #define DIRA		(3*RS)		/* A-side direction (1=output) */
86 #define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
87 #define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
88 #define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
89 #define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
90 #define T2CL		(8*RS)		/* Timer 2 ctr/latch (low 8 bits) */
91 #define T2CH		(9*RS)		/* Timer 2 counter (high 8 bits) */
92 #define SR		(10*RS)		/* Shift register */
93 #define ACR		(11*RS)		/* Auxiliary control register */
94 #define PCR		(12*RS)		/* Peripheral control register */
95 #define IFR		(13*RS)		/* Interrupt flag register */
96 #define IER		(14*RS)		/* Interrupt enable register */
97 #define ANH		(15*RS)		/* A-side data, no handshake */
98 
99 /* Bits in B data register: both active low */
100 #define TACK		0x08		/* Transfer acknowledge (input) */
101 #define TREQ		0x10		/* Transfer request (output) */
102 
103 /* Bits in ACR */
104 #define SR_CTRL		0x1c		/* Shift register control bits */
105 #define SR_EXT		0x0c		/* Shift on external clock */
106 #define SR_OUT		0x10		/* Shift out if 1 */
107 
108 /* Bits in IFR and IER */
109 #define IER_SET		0x80		/* set bits in IER */
110 #define IER_CLR		0		/* clear bits in IER */
111 #define SR_INT		0x04		/* Shift register full/empty */
112 #define CB2_INT		0x08
113 #define CB1_INT		0x10		/* transition on CB1 input */
114 
115 static volatile enum pmu_state {
116 	idle,
117 	sending,
118 	intack,
119 	reading,
120 	reading_intr,
121 	locked,
122 } pmu_state;
123 
124 static volatile enum int_data_state {
125 	int_data_empty,
126 	int_data_fill,
127 	int_data_ready,
128 	int_data_flush
129 } int_data_state[2] = { int_data_empty, int_data_empty };
130 
131 static struct adb_request *current_req;
132 static struct adb_request *last_req;
133 static struct adb_request *req_awaiting_reply;
134 static unsigned char interrupt_data[2][32];
135 static int interrupt_data_len[2];
136 static int int_data_last;
137 static unsigned char *reply_ptr;
138 static int data_index;
139 static int data_len;
140 static volatile int adb_int_pending;
141 static volatile int disable_poll;
142 static struct device_node *vias;
143 static int pmu_kind = PMU_UNKNOWN;
144 static int pmu_fully_inited;
145 static int pmu_has_adb;
146 static struct device_node *gpio_node;
147 static unsigned char __iomem *gpio_reg;
148 static int gpio_irq = NO_IRQ;
149 static int gpio_irq_enabled = -1;
150 static volatile int pmu_suspended;
151 static spinlock_t pmu_lock;
152 static u8 pmu_intr_mask;
153 static int pmu_version;
154 static int drop_interrupts;
155 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
156 static int option_lid_wakeup = 1;
157 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
158 static unsigned long async_req_locks;
159 static unsigned int pmu_irq_stats[11];
160 
161 static struct proc_dir_entry *proc_pmu_root;
162 static struct proc_dir_entry *proc_pmu_info;
163 static struct proc_dir_entry *proc_pmu_irqstats;
164 static struct proc_dir_entry *proc_pmu_options;
165 static int option_server_mode;
166 
167 int pmu_battery_count;
168 int pmu_cur_battery;
169 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
171 static int query_batt_timer = BATTERY_POLLING_COUNT;
172 static struct adb_request batt_req;
173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
174 
175 int __fake_sleep;
176 int asleep;
177 
178 #ifdef CONFIG_ADB
179 static int adb_dev_map;
180 static int pmu_adb_flags;
181 
182 static int pmu_probe(void);
183 static int pmu_init(void);
184 static int pmu_send_request(struct adb_request *req, int sync);
185 static int pmu_adb_autopoll(int devs);
186 static int pmu_adb_reset_bus(void);
187 #endif /* CONFIG_ADB */
188 
189 static int init_pmu(void);
190 static void pmu_start(void);
191 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
192 static irqreturn_t gpio1_interrupt(int irq, void *arg);
193 static const struct file_operations pmu_info_proc_fops;
194 static const struct file_operations pmu_irqstats_proc_fops;
195 static void pmu_pass_intr(unsigned char *data, int len);
196 static const struct file_operations pmu_battery_proc_fops;
197 static const struct file_operations pmu_options_proc_fops;
198 
199 #ifdef CONFIG_ADB
200 struct adb_driver via_pmu_driver = {
201 	"PMU",
202 	pmu_probe,
203 	pmu_init,
204 	pmu_send_request,
205 	pmu_adb_autopoll,
206 	pmu_poll_adb,
207 	pmu_adb_reset_bus
208 };
209 #endif /* CONFIG_ADB */
210 
211 extern void low_sleep_handler(void);
212 extern void enable_kernel_altivec(void);
213 extern void enable_kernel_fp(void);
214 
215 #ifdef DEBUG_SLEEP
216 int pmu_polled_request(struct adb_request *req);
217 void pmu_blink(int n);
218 #endif
219 
220 /*
221  * This table indicates for each PMU opcode:
222  * - the number of data bytes to be sent with the command, or -1
223  *   if a length byte should be sent,
224  * - the number of response bytes which the PMU will return, or
225  *   -1 if it will send a length byte.
226  */
227 static const s8 pmu_data_len[256][2] = {
228 /*	   0	   1	   2	   3	   4	   5	   6	   7  */
229 /*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
230 /*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
231 /*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
232 /*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
233 /*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
234 /*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
235 /*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
236 /*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
237 /*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
238 /*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
239 /*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
240 /*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
241 /*60*/	{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
242 /*68*/	{ 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
243 /*70*/	{ 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
244 /*78*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
245 /*80*/	{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
246 /*88*/	{ 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
247 /*90*/	{ 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
248 /*98*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
249 /*a0*/	{ 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
250 /*a8*/	{ 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
251 /*b0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*b8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
253 /*c0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*c8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
255 /*d0*/	{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*d8*/	{ 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
257 /*e0*/	{-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
258 /*e8*/	{ 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
259 /*f0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260 /*f8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
261 };
262 
263 static char *pbook_type[] = {
264 	"Unknown PowerBook",
265 	"PowerBook 2400/3400/3500(G3)",
266 	"PowerBook G3 Series",
267 	"1999 PowerBook G3",
268 	"Core99"
269 };
270 
271 int __init find_via_pmu(void)
272 {
273 	u64 taddr;
274 	const u32 *reg;
275 
276 	if (via != 0)
277 		return 1;
278 	vias = of_find_node_by_name(NULL, "via-pmu");
279 	if (vias == NULL)
280 		return 0;
281 
282 	reg = of_get_property(vias, "reg", NULL);
283 	if (reg == NULL) {
284 		printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
285 		goto fail;
286 	}
287 	taddr = of_translate_address(vias, reg);
288 	if (taddr == OF_BAD_ADDR) {
289 		printk(KERN_ERR "via-pmu: Can't translate address !\n");
290 		goto fail;
291 	}
292 
293 	spin_lock_init(&pmu_lock);
294 
295 	pmu_has_adb = 1;
296 
297 	pmu_intr_mask =	PMU_INT_PCEJECT |
298 			PMU_INT_SNDBRT |
299 			PMU_INT_ADB |
300 			PMU_INT_TICK;
301 
302 	if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
303 	    || of_device_is_compatible(vias->parent, "ohare")))
304 		pmu_kind = PMU_OHARE_BASED;
305 	else if (of_device_is_compatible(vias->parent, "paddington"))
306 		pmu_kind = PMU_PADDINGTON_BASED;
307 	else if (of_device_is_compatible(vias->parent, "heathrow"))
308 		pmu_kind = PMU_HEATHROW_BASED;
309 	else if (of_device_is_compatible(vias->parent, "Keylargo")
310 		 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
311 		struct device_node *gpiop;
312 		struct device_node *adbp;
313 		u64 gaddr = OF_BAD_ADDR;
314 
315 		pmu_kind = PMU_KEYLARGO_BASED;
316 		adbp = of_find_node_by_type(NULL, "adb");
317 		pmu_has_adb = (adbp != NULL);
318 		of_node_put(adbp);
319 		pmu_intr_mask =	PMU_INT_PCEJECT |
320 				PMU_INT_SNDBRT |
321 				PMU_INT_ADB |
322 				PMU_INT_TICK |
323 				PMU_INT_ENVIRONMENT;
324 
325 		gpiop = of_find_node_by_name(NULL, "gpio");
326 		if (gpiop) {
327 			reg = of_get_property(gpiop, "reg", NULL);
328 			if (reg)
329 				gaddr = of_translate_address(gpiop, reg);
330 			if (gaddr != OF_BAD_ADDR)
331 				gpio_reg = ioremap(gaddr, 0x10);
332 			of_node_put(gpiop);
333 		}
334 		if (gpio_reg == NULL) {
335 			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
336 			goto fail;
337 		}
338 	} else
339 		pmu_kind = PMU_UNKNOWN;
340 
341 	via = ioremap(taddr, 0x2000);
342 	if (via == NULL) {
343 		printk(KERN_ERR "via-pmu: Can't map address !\n");
344 		goto fail_via_remap;
345 	}
346 
347 	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
348 	out_8(&via[IFR], 0x7f);			/* clear IFR */
349 
350 	pmu_state = idle;
351 
352 	if (!init_pmu())
353 		goto fail_init;
354 
355 	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
356 	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
357 
358 	sys_ctrler = SYS_CTRLER_PMU;
359 
360 	return 1;
361 
362  fail_init:
363 	iounmap(via);
364 	via = NULL;
365  fail_via_remap:
366 	iounmap(gpio_reg);
367 	gpio_reg = NULL;
368  fail:
369 	of_node_put(vias);
370 	vias = NULL;
371 	return 0;
372 }
373 
374 #ifdef CONFIG_ADB
375 static int pmu_probe(void)
376 {
377 	return vias == NULL? -ENODEV: 0;
378 }
379 
380 static int __init pmu_init(void)
381 {
382 	if (vias == NULL)
383 		return -ENODEV;
384 	return 0;
385 }
386 #endif /* CONFIG_ADB */
387 
388 /*
389  * We can't wait until pmu_init gets called, that happens too late.
390  * It happens after IDE and SCSI initialization, which can take a few
391  * seconds, and by that time the PMU could have given up on us and
392  * turned us off.
393  * Thus this is called with arch_initcall rather than device_initcall.
394  */
395 static int __init via_pmu_start(void)
396 {
397 	unsigned int irq;
398 
399 	if (vias == NULL)
400 		return -ENODEV;
401 
402 	batt_req.complete = 1;
403 
404 	irq = irq_of_parse_and_map(vias, 0);
405 	if (irq == NO_IRQ) {
406 		printk(KERN_ERR "via-pmu: can't map interrupt\n");
407 		return -ENODEV;
408 	}
409 	/* We set IRQF_NO_SUSPEND because we don't want the interrupt
410 	 * to be disabled between the 2 passes of driver suspend, we
411 	 * control our own disabling for that one
412 	 */
413 	if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
414 			"VIA-PMU", (void *)0)) {
415 		printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
416 		return -ENODEV;
417 	}
418 
419 	if (pmu_kind == PMU_KEYLARGO_BASED) {
420 		gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
421 		if (gpio_node == NULL)
422 			gpio_node = of_find_node_by_name(NULL,
423 							 "pmu-interrupt");
424 		if (gpio_node)
425 			gpio_irq = irq_of_parse_and_map(gpio_node, 0);
426 
427 		if (gpio_irq != NO_IRQ) {
428 			if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
429 					"GPIO1 ADB", (void *)0))
430 				printk(KERN_ERR "pmu: can't get irq %d"
431 				       " (GPIO1)\n", gpio_irq);
432 			else
433 				gpio_irq_enabled = 1;
434 		}
435 	}
436 
437 	/* Enable interrupts */
438 	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
439 
440 	pmu_fully_inited = 1;
441 
442 	/* Make sure PMU settle down before continuing. This is _very_ important
443 	 * since the IDE probe may shut interrupts down for quite a bit of time. If
444 	 * a PMU communication is pending while this happens, the PMU may timeout
445 	 * Not that on Core99 machines, the PMU keeps sending us environement
446 	 * messages, we should find a way to either fix IDE or make it call
447 	 * pmu_suspend() before masking interrupts. This can also happens while
448 	 * scolling with some fbdevs.
449 	 */
450 	do {
451 		pmu_poll();
452 	} while (pmu_state != idle);
453 
454 	return 0;
455 }
456 
457 arch_initcall(via_pmu_start);
458 
459 /*
460  * This has to be done after pci_init, which is a subsys_initcall.
461  */
462 static int __init via_pmu_dev_init(void)
463 {
464 	if (vias == NULL)
465 		return -ENODEV;
466 
467 #ifdef CONFIG_PMAC_BACKLIGHT
468 	/* Initialize backlight */
469 	pmu_backlight_init();
470 #endif
471 
472 #ifdef CONFIG_PPC32
473   	if (of_machine_is_compatible("AAPL,3400/2400") ||
474   		of_machine_is_compatible("AAPL,3500")) {
475 		int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
476 			NULL, PMAC_MB_INFO_MODEL, 0);
477 		pmu_battery_count = 1;
478 		if (mb == PMAC_TYPE_COMET)
479 			pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
480 		else
481 			pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
482 	} else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
483 		of_machine_is_compatible("PowerBook1,1")) {
484 		pmu_battery_count = 2;
485 		pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
486 		pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
487 	} else {
488 		struct device_node* prim =
489 			of_find_node_by_name(NULL, "power-mgt");
490 		const u32 *prim_info = NULL;
491 		if (prim)
492 			prim_info = of_get_property(prim, "prim-info", NULL);
493 		if (prim_info) {
494 			/* Other stuffs here yet unknown */
495 			pmu_battery_count = (prim_info[6] >> 16) & 0xff;
496 			pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
497 			if (pmu_battery_count > 1)
498 				pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
499 		}
500 		of_node_put(prim);
501 	}
502 #endif /* CONFIG_PPC32 */
503 
504 	/* Create /proc/pmu */
505 	proc_pmu_root = proc_mkdir("pmu", NULL);
506 	if (proc_pmu_root) {
507 		long i;
508 
509 		for (i=0; i<pmu_battery_count; i++) {
510 			char title[16];
511 			sprintf(title, "battery_%ld", i);
512 			proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
513 					&pmu_battery_proc_fops, (void *)i);
514 		}
515 
516 		proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
517 		proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
518 						&pmu_irqstats_proc_fops);
519 		proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
520 						&pmu_options_proc_fops);
521 	}
522 	return 0;
523 }
524 
525 device_initcall(via_pmu_dev_init);
526 
527 static int
528 init_pmu(void)
529 {
530 	int timeout;
531 	struct adb_request req;
532 
533 	out_8(&via[B], via[B] | TREQ);			/* negate TREQ */
534 	out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);	/* TACK in, TREQ out */
535 
536 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
537 	timeout =  100000;
538 	while (!req.complete) {
539 		if (--timeout < 0) {
540 			printk(KERN_ERR "init_pmu: no response from PMU\n");
541 			return 0;
542 		}
543 		udelay(10);
544 		pmu_poll();
545 	}
546 
547 	/* ack all pending interrupts */
548 	timeout = 100000;
549 	interrupt_data[0][0] = 1;
550 	while (interrupt_data[0][0] || pmu_state != idle) {
551 		if (--timeout < 0) {
552 			printk(KERN_ERR "init_pmu: timed out acking intrs\n");
553 			return 0;
554 		}
555 		if (pmu_state == idle)
556 			adb_int_pending = 1;
557 		via_pmu_interrupt(0, NULL);
558 		udelay(10);
559 	}
560 
561 	/* Tell PMU we are ready.  */
562 	if (pmu_kind == PMU_KEYLARGO_BASED) {
563 		pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
564 		while (!req.complete)
565 			pmu_poll();
566 	}
567 
568 	/* Read PMU version */
569 	pmu_request(&req, NULL, 1, PMU_GET_VERSION);
570 	pmu_wait_complete(&req);
571 	if (req.reply_len > 0)
572 		pmu_version = req.reply[0];
573 
574 	/* Read server mode setting */
575 	if (pmu_kind == PMU_KEYLARGO_BASED) {
576 		pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
577 			    PMU_PWR_GET_POWERUP_EVENTS);
578 		pmu_wait_complete(&req);
579 		if (req.reply_len == 2) {
580 			if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
581 				option_server_mode = 1;
582 			printk(KERN_INFO "via-pmu: Server Mode is %s\n",
583 			       option_server_mode ? "enabled" : "disabled");
584 		}
585 	}
586 	return 1;
587 }
588 
589 int
590 pmu_get_model(void)
591 {
592 	return pmu_kind;
593 }
594 
595 static void pmu_set_server_mode(int server_mode)
596 {
597 	struct adb_request req;
598 
599 	if (pmu_kind != PMU_KEYLARGO_BASED)
600 		return;
601 
602 	option_server_mode = server_mode;
603 	pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
604 	pmu_wait_complete(&req);
605 	if (req.reply_len < 2)
606 		return;
607 	if (server_mode)
608 		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
609 			    PMU_PWR_SET_POWERUP_EVENTS,
610 			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
611 	else
612 		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
613 			    PMU_PWR_CLR_POWERUP_EVENTS,
614 			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
615 	pmu_wait_complete(&req);
616 }
617 
618 /* This new version of the code for 2400/3400/3500 powerbooks
619  * is inspired from the implementation in gkrellm-pmu
620  */
621 static void
622 done_battery_state_ohare(struct adb_request* req)
623 {
624 	/* format:
625 	 *  [0]    :  flags
626 	 *    0x01 :  AC indicator
627 	 *    0x02 :  charging
628 	 *    0x04 :  battery exist
629 	 *    0x08 :
630 	 *    0x10 :
631 	 *    0x20 :  full charged
632 	 *    0x40 :  pcharge reset
633 	 *    0x80 :  battery exist
634 	 *
635 	 *  [1][2] :  battery voltage
636 	 *  [3]    :  CPU temperature
637 	 *  [4]    :  battery temperature
638 	 *  [5]    :  current
639 	 *  [6][7] :  pcharge
640 	 *              --tkoba
641 	 */
642 	unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
643 	long pcharge, charge, vb, vmax, lmax;
644 	long vmax_charging, vmax_charged;
645 	long amperage, voltage, time, max;
646 	int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
647 			NULL, PMAC_MB_INFO_MODEL, 0);
648 
649 	if (req->reply[0] & 0x01)
650 		pmu_power_flags |= PMU_PWR_AC_PRESENT;
651 	else
652 		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
653 
654 	if (mb == PMAC_TYPE_COMET) {
655 		vmax_charged = 189;
656 		vmax_charging = 213;
657 		lmax = 6500;
658 	} else {
659 		vmax_charged = 330;
660 		vmax_charging = 330;
661 		lmax = 6500;
662 	}
663 	vmax = vmax_charged;
664 
665 	/* If battery installed */
666 	if (req->reply[0] & 0x04) {
667 		bat_flags |= PMU_BATT_PRESENT;
668 		if (req->reply[0] & 0x02)
669 			bat_flags |= PMU_BATT_CHARGING;
670 		vb = (req->reply[1] << 8) | req->reply[2];
671 		voltage = (vb * 265 + 72665) / 10;
672 		amperage = req->reply[5];
673 		if ((req->reply[0] & 0x01) == 0) {
674 			if (amperage > 200)
675 				vb += ((amperage - 200) * 15)/100;
676 		} else if (req->reply[0] & 0x02) {
677 			vb = (vb * 97) / 100;
678 			vmax = vmax_charging;
679 		}
680 		charge = (100 * vb) / vmax;
681 		if (req->reply[0] & 0x40) {
682 			pcharge = (req->reply[6] << 8) + req->reply[7];
683 			if (pcharge > lmax)
684 				pcharge = lmax;
685 			pcharge *= 100;
686 			pcharge = 100 - pcharge / lmax;
687 			if (pcharge < charge)
688 				charge = pcharge;
689 		}
690 		if (amperage > 0)
691 			time = (charge * 16440) / amperage;
692 		else
693 			time = 0;
694 		max = 100;
695 		amperage = -amperage;
696 	} else
697 		charge = max = amperage = voltage = time = 0;
698 
699 	pmu_batteries[pmu_cur_battery].flags = bat_flags;
700 	pmu_batteries[pmu_cur_battery].charge = charge;
701 	pmu_batteries[pmu_cur_battery].max_charge = max;
702 	pmu_batteries[pmu_cur_battery].amperage = amperage;
703 	pmu_batteries[pmu_cur_battery].voltage = voltage;
704 	pmu_batteries[pmu_cur_battery].time_remaining = time;
705 
706 	clear_bit(0, &async_req_locks);
707 }
708 
709 static void
710 done_battery_state_smart(struct adb_request* req)
711 {
712 	/* format:
713 	 *  [0] : format of this structure (known: 3,4,5)
714 	 *  [1] : flags
715 	 *
716 	 *  format 3 & 4:
717 	 *
718 	 *  [2] : charge
719 	 *  [3] : max charge
720 	 *  [4] : current
721 	 *  [5] : voltage
722 	 *
723 	 *  format 5:
724 	 *
725 	 *  [2][3] : charge
726 	 *  [4][5] : max charge
727 	 *  [6][7] : current
728 	 *  [8][9] : voltage
729 	 */
730 
731 	unsigned int bat_flags = PMU_BATT_TYPE_SMART;
732 	int amperage;
733 	unsigned int capa, max, voltage;
734 
735 	if (req->reply[1] & 0x01)
736 		pmu_power_flags |= PMU_PWR_AC_PRESENT;
737 	else
738 		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
739 
740 
741 	capa = max = amperage = voltage = 0;
742 
743 	if (req->reply[1] & 0x04) {
744 		bat_flags |= PMU_BATT_PRESENT;
745 		switch(req->reply[0]) {
746 			case 3:
747 			case 4: capa = req->reply[2];
748 				max = req->reply[3];
749 				amperage = *((signed char *)&req->reply[4]);
750 				voltage = req->reply[5];
751 				break;
752 			case 5: capa = (req->reply[2] << 8) | req->reply[3];
753 				max = (req->reply[4] << 8) | req->reply[5];
754 				amperage = *((signed short *)&req->reply[6]);
755 				voltage = (req->reply[8] << 8) | req->reply[9];
756 				break;
757 			default:
758 				pr_warn("pmu.c: unrecognized battery info, "
759 					"len: %d, %4ph\n", req->reply_len,
760 							   req->reply);
761 				break;
762 		}
763 	}
764 
765 	if ((req->reply[1] & 0x01) && (amperage > 0))
766 		bat_flags |= PMU_BATT_CHARGING;
767 
768 	pmu_batteries[pmu_cur_battery].flags = bat_flags;
769 	pmu_batteries[pmu_cur_battery].charge = capa;
770 	pmu_batteries[pmu_cur_battery].max_charge = max;
771 	pmu_batteries[pmu_cur_battery].amperage = amperage;
772 	pmu_batteries[pmu_cur_battery].voltage = voltage;
773 	if (amperage) {
774 		if ((req->reply[1] & 0x01) && (amperage > 0))
775 			pmu_batteries[pmu_cur_battery].time_remaining
776 				= ((max-capa) * 3600) / amperage;
777 		else
778 			pmu_batteries[pmu_cur_battery].time_remaining
779 				= (capa * 3600) / (-amperage);
780 	} else
781 		pmu_batteries[pmu_cur_battery].time_remaining = 0;
782 
783 	pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
784 
785 	clear_bit(0, &async_req_locks);
786 }
787 
788 static void
789 query_battery_state(void)
790 {
791 	if (test_and_set_bit(0, &async_req_locks))
792 		return;
793 	if (pmu_kind == PMU_OHARE_BASED)
794 		pmu_request(&batt_req, done_battery_state_ohare,
795 			1, PMU_BATTERY_STATE);
796 	else
797 		pmu_request(&batt_req, done_battery_state_smart,
798 			2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
799 }
800 
801 static int pmu_info_proc_show(struct seq_file *m, void *v)
802 {
803 	seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
804 	seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
805 	seq_printf(m, "AC Power               : %d\n",
806 		((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
807 	seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
808 
809 	return 0;
810 }
811 
812 static int pmu_info_proc_open(struct inode *inode, struct file *file)
813 {
814 	return single_open(file, pmu_info_proc_show, NULL);
815 }
816 
817 static const struct file_operations pmu_info_proc_fops = {
818 	.owner		= THIS_MODULE,
819 	.open		= pmu_info_proc_open,
820 	.read		= seq_read,
821 	.llseek		= seq_lseek,
822 	.release	= single_release,
823 };
824 
825 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
826 {
827 	int i;
828 	static const char *irq_names[] = {
829 		"Total CB1 triggered events",
830 		"Total GPIO1 triggered events",
831 		"PC-Card eject button",
832 		"Sound/Brightness button",
833 		"ADB message",
834 		"Battery state change",
835 		"Environment interrupt",
836 		"Tick timer",
837 		"Ghost interrupt (zero len)",
838 		"Empty interrupt (empty mask)",
839 		"Max irqs in a row"
840         };
841 
842 	for (i=0; i<11; i++) {
843 		seq_printf(m, " %2u: %10u (%s)\n",
844 			     i, pmu_irq_stats[i], irq_names[i]);
845 	}
846 	return 0;
847 }
848 
849 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
850 {
851 	return single_open(file, pmu_irqstats_proc_show, NULL);
852 }
853 
854 static const struct file_operations pmu_irqstats_proc_fops = {
855 	.owner		= THIS_MODULE,
856 	.open		= pmu_irqstats_proc_open,
857 	.read		= seq_read,
858 	.llseek		= seq_lseek,
859 	.release	= single_release,
860 };
861 
862 static int pmu_battery_proc_show(struct seq_file *m, void *v)
863 {
864 	long batnum = (long)m->private;
865 
866 	seq_putc(m, '\n');
867 	seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
868 	seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
869 	seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
870 	seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
871 	seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
872 	seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
873 	return 0;
874 }
875 
876 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
877 {
878 	return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
879 }
880 
881 static const struct file_operations pmu_battery_proc_fops = {
882 	.owner		= THIS_MODULE,
883 	.open		= pmu_battery_proc_open,
884 	.read		= seq_read,
885 	.llseek		= seq_lseek,
886 	.release	= single_release,
887 };
888 
889 static int pmu_options_proc_show(struct seq_file *m, void *v)
890 {
891 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
892 	if (pmu_kind == PMU_KEYLARGO_BASED &&
893 	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
894 		seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
895 #endif
896 	if (pmu_kind == PMU_KEYLARGO_BASED)
897 		seq_printf(m, "server_mode=%d\n", option_server_mode);
898 
899 	return 0;
900 }
901 
902 static int pmu_options_proc_open(struct inode *inode, struct file *file)
903 {
904 	return single_open(file, pmu_options_proc_show, NULL);
905 }
906 
907 static ssize_t pmu_options_proc_write(struct file *file,
908 		const char __user *buffer, size_t count, loff_t *pos)
909 {
910 	char tmp[33];
911 	char *label, *val;
912 	size_t fcount = count;
913 
914 	if (!count)
915 		return -EINVAL;
916 	if (count > 32)
917 		count = 32;
918 	if (copy_from_user(tmp, buffer, count))
919 		return -EFAULT;
920 	tmp[count] = 0;
921 
922 	label = tmp;
923 	while(*label == ' ')
924 		label++;
925 	val = label;
926 	while(*val && (*val != '=')) {
927 		if (*val == ' ')
928 			*val = 0;
929 		val++;
930 	}
931 	if ((*val) == 0)
932 		return -EINVAL;
933 	*(val++) = 0;
934 	while(*val == ' ')
935 		val++;
936 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
937 	if (pmu_kind == PMU_KEYLARGO_BASED &&
938 	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
939 		if (!strcmp(label, "lid_wakeup"))
940 			option_lid_wakeup = ((*val) == '1');
941 #endif
942 	if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
943 		int new_value;
944 		new_value = ((*val) == '1');
945 		if (new_value != option_server_mode)
946 			pmu_set_server_mode(new_value);
947 	}
948 	return fcount;
949 }
950 
951 static const struct file_operations pmu_options_proc_fops = {
952 	.owner		= THIS_MODULE,
953 	.open		= pmu_options_proc_open,
954 	.read		= seq_read,
955 	.llseek		= seq_lseek,
956 	.release	= single_release,
957 	.write		= pmu_options_proc_write,
958 };
959 
960 #ifdef CONFIG_ADB
961 /* Send an ADB command */
962 static int pmu_send_request(struct adb_request *req, int sync)
963 {
964 	int i, ret;
965 
966 	if ((vias == NULL) || (!pmu_fully_inited)) {
967 		req->complete = 1;
968 		return -ENXIO;
969 	}
970 
971 	ret = -EINVAL;
972 
973 	switch (req->data[0]) {
974 	case PMU_PACKET:
975 		for (i = 0; i < req->nbytes - 1; ++i)
976 			req->data[i] = req->data[i+1];
977 		--req->nbytes;
978 		if (pmu_data_len[req->data[0]][1] != 0) {
979 			req->reply[0] = ADB_RET_OK;
980 			req->reply_len = 1;
981 		} else
982 			req->reply_len = 0;
983 		ret = pmu_queue_request(req);
984 		break;
985 	case CUDA_PACKET:
986 		switch (req->data[1]) {
987 		case CUDA_GET_TIME:
988 			if (req->nbytes != 2)
989 				break;
990 			req->data[0] = PMU_READ_RTC;
991 			req->nbytes = 1;
992 			req->reply_len = 3;
993 			req->reply[0] = CUDA_PACKET;
994 			req->reply[1] = 0;
995 			req->reply[2] = CUDA_GET_TIME;
996 			ret = pmu_queue_request(req);
997 			break;
998 		case CUDA_SET_TIME:
999 			if (req->nbytes != 6)
1000 				break;
1001 			req->data[0] = PMU_SET_RTC;
1002 			req->nbytes = 5;
1003 			for (i = 1; i <= 4; ++i)
1004 				req->data[i] = req->data[i+1];
1005 			req->reply_len = 3;
1006 			req->reply[0] = CUDA_PACKET;
1007 			req->reply[1] = 0;
1008 			req->reply[2] = CUDA_SET_TIME;
1009 			ret = pmu_queue_request(req);
1010 			break;
1011 		}
1012 		break;
1013 	case ADB_PACKET:
1014 	    	if (!pmu_has_adb)
1015     			return -ENXIO;
1016 		for (i = req->nbytes - 1; i > 1; --i)
1017 			req->data[i+2] = req->data[i];
1018 		req->data[3] = req->nbytes - 2;
1019 		req->data[2] = pmu_adb_flags;
1020 		/*req->data[1] = req->data[1];*/
1021 		req->data[0] = PMU_ADB_CMD;
1022 		req->nbytes += 2;
1023 		req->reply_expected = 1;
1024 		req->reply_len = 0;
1025 		ret = pmu_queue_request(req);
1026 		break;
1027 	}
1028 	if (ret) {
1029 		req->complete = 1;
1030 		return ret;
1031 	}
1032 
1033 	if (sync)
1034 		while (!req->complete)
1035 			pmu_poll();
1036 
1037 	return 0;
1038 }
1039 
1040 /* Enable/disable autopolling */
1041 static int __pmu_adb_autopoll(int devs)
1042 {
1043 	struct adb_request req;
1044 
1045 	if (devs) {
1046 		pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1047 			    adb_dev_map >> 8, adb_dev_map);
1048 		pmu_adb_flags = 2;
1049 	} else {
1050 		pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1051 		pmu_adb_flags = 0;
1052 	}
1053 	while (!req.complete)
1054 		pmu_poll();
1055 	return 0;
1056 }
1057 
1058 static int pmu_adb_autopoll(int devs)
1059 {
1060 	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1061 		return -ENXIO;
1062 
1063 	adb_dev_map = devs;
1064 	return __pmu_adb_autopoll(devs);
1065 }
1066 
1067 /* Reset the ADB bus */
1068 static int pmu_adb_reset_bus(void)
1069 {
1070 	struct adb_request req;
1071 	int save_autopoll = adb_dev_map;
1072 
1073 	if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1074 		return -ENXIO;
1075 
1076 	/* anyone got a better idea?? */
1077 	__pmu_adb_autopoll(0);
1078 
1079 	req.nbytes = 4;
1080 	req.done = NULL;
1081 	req.data[0] = PMU_ADB_CMD;
1082 	req.data[1] = ADB_BUSRESET;
1083 	req.data[2] = 0;
1084 	req.data[3] = 0;
1085 	req.data[4] = 0;
1086 	req.reply_len = 0;
1087 	req.reply_expected = 1;
1088 	if (pmu_queue_request(&req) != 0) {
1089 		printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1090 		return -EIO;
1091 	}
1092 	pmu_wait_complete(&req);
1093 
1094 	if (save_autopoll != 0)
1095 		__pmu_adb_autopoll(save_autopoll);
1096 
1097 	return 0;
1098 }
1099 #endif /* CONFIG_ADB */
1100 
1101 /* Construct and send a pmu request */
1102 int
1103 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1104 	    int nbytes, ...)
1105 {
1106 	va_list list;
1107 	int i;
1108 
1109 	if (vias == NULL)
1110 		return -ENXIO;
1111 
1112 	if (nbytes < 0 || nbytes > 32) {
1113 		printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1114 		req->complete = 1;
1115 		return -EINVAL;
1116 	}
1117 	req->nbytes = nbytes;
1118 	req->done = done;
1119 	va_start(list, nbytes);
1120 	for (i = 0; i < nbytes; ++i)
1121 		req->data[i] = va_arg(list, int);
1122 	va_end(list);
1123 	req->reply_len = 0;
1124 	req->reply_expected = 0;
1125 	return pmu_queue_request(req);
1126 }
1127 
1128 int
1129 pmu_queue_request(struct adb_request *req)
1130 {
1131 	unsigned long flags;
1132 	int nsend;
1133 
1134 	if (via == NULL) {
1135 		req->complete = 1;
1136 		return -ENXIO;
1137 	}
1138 	if (req->nbytes <= 0) {
1139 		req->complete = 1;
1140 		return 0;
1141 	}
1142 	nsend = pmu_data_len[req->data[0]][0];
1143 	if (nsend >= 0 && req->nbytes != nsend + 1) {
1144 		req->complete = 1;
1145 		return -EINVAL;
1146 	}
1147 
1148 	req->next = NULL;
1149 	req->sent = 0;
1150 	req->complete = 0;
1151 
1152 	spin_lock_irqsave(&pmu_lock, flags);
1153 	if (current_req != 0) {
1154 		last_req->next = req;
1155 		last_req = req;
1156 	} else {
1157 		current_req = req;
1158 		last_req = req;
1159 		if (pmu_state == idle)
1160 			pmu_start();
1161 	}
1162 	spin_unlock_irqrestore(&pmu_lock, flags);
1163 
1164 	return 0;
1165 }
1166 
1167 static inline void
1168 wait_for_ack(void)
1169 {
1170 	/* Sightly increased the delay, I had one occurrence of the message
1171 	 * reported
1172 	 */
1173 	int timeout = 4000;
1174 	while ((in_8(&via[B]) & TACK) == 0) {
1175 		if (--timeout < 0) {
1176 			printk(KERN_ERR "PMU not responding (!ack)\n");
1177 			return;
1178 		}
1179 		udelay(10);
1180 	}
1181 }
1182 
1183 /* New PMU seems to be very sensitive to those timings, so we make sure
1184  * PCI is flushed immediately */
1185 static inline void
1186 send_byte(int x)
1187 {
1188 	volatile unsigned char __iomem *v = via;
1189 
1190 	out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1191 	out_8(&v[SR], x);
1192 	out_8(&v[B], in_8(&v[B]) & ~TREQ);		/* assert TREQ */
1193 	(void)in_8(&v[B]);
1194 }
1195 
1196 static inline void
1197 recv_byte(void)
1198 {
1199 	volatile unsigned char __iomem *v = via;
1200 
1201 	out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1202 	in_8(&v[SR]);		/* resets SR */
1203 	out_8(&v[B], in_8(&v[B]) & ~TREQ);
1204 	(void)in_8(&v[B]);
1205 }
1206 
1207 static inline void
1208 pmu_done(struct adb_request *req)
1209 {
1210 	void (*done)(struct adb_request *) = req->done;
1211 	mb();
1212 	req->complete = 1;
1213     	/* Here, we assume that if the request has a done member, the
1214     	 * struct request will survive to setting req->complete to 1
1215     	 */
1216 	if (done)
1217 		(*done)(req);
1218 }
1219 
1220 static void
1221 pmu_start(void)
1222 {
1223 	struct adb_request *req;
1224 
1225 	/* assert pmu_state == idle */
1226 	/* get the packet to send */
1227 	req = current_req;
1228 	if (req == 0 || pmu_state != idle
1229 	    || (/*req->reply_expected && */req_awaiting_reply))
1230 		return;
1231 
1232 	pmu_state = sending;
1233 	data_index = 1;
1234 	data_len = pmu_data_len[req->data[0]][0];
1235 
1236 	/* Sounds safer to make sure ACK is high before writing. This helped
1237 	 * kill a problem with ADB and some iBooks
1238 	 */
1239 	wait_for_ack();
1240 	/* set the shift register to shift out and send a byte */
1241 	send_byte(req->data[0]);
1242 }
1243 
1244 void
1245 pmu_poll(void)
1246 {
1247 	if (!via)
1248 		return;
1249 	if (disable_poll)
1250 		return;
1251 	via_pmu_interrupt(0, NULL);
1252 }
1253 
1254 void
1255 pmu_poll_adb(void)
1256 {
1257 	if (!via)
1258 		return;
1259 	if (disable_poll)
1260 		return;
1261 	/* Kicks ADB read when PMU is suspended */
1262 	adb_int_pending = 1;
1263 	do {
1264 		via_pmu_interrupt(0, NULL);
1265 	} while (pmu_suspended && (adb_int_pending || pmu_state != idle
1266 		|| req_awaiting_reply));
1267 }
1268 
1269 void
1270 pmu_wait_complete(struct adb_request *req)
1271 {
1272 	if (!via)
1273 		return;
1274 	while((pmu_state != idle && pmu_state != locked) || !req->complete)
1275 		via_pmu_interrupt(0, NULL);
1276 }
1277 
1278 /* This function loops until the PMU is idle and prevents it from
1279  * anwsering to ADB interrupts. pmu_request can still be called.
1280  * This is done to avoid spurrious shutdowns when we know we'll have
1281  * interrupts switched off for a long time
1282  */
1283 void
1284 pmu_suspend(void)
1285 {
1286 	unsigned long flags;
1287 
1288 	if (!via)
1289 		return;
1290 
1291 	spin_lock_irqsave(&pmu_lock, flags);
1292 	pmu_suspended++;
1293 	if (pmu_suspended > 1) {
1294 		spin_unlock_irqrestore(&pmu_lock, flags);
1295 		return;
1296 	}
1297 
1298 	do {
1299 		spin_unlock_irqrestore(&pmu_lock, flags);
1300 		if (req_awaiting_reply)
1301 			adb_int_pending = 1;
1302 		via_pmu_interrupt(0, NULL);
1303 		spin_lock_irqsave(&pmu_lock, flags);
1304 		if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1305 			if (gpio_irq >= 0)
1306 				disable_irq_nosync(gpio_irq);
1307 			out_8(&via[IER], CB1_INT | IER_CLR);
1308 			spin_unlock_irqrestore(&pmu_lock, flags);
1309 			break;
1310 		}
1311 	} while (1);
1312 }
1313 
1314 void
1315 pmu_resume(void)
1316 {
1317 	unsigned long flags;
1318 
1319 	if (!via || (pmu_suspended < 1))
1320 		return;
1321 
1322 	spin_lock_irqsave(&pmu_lock, flags);
1323 	pmu_suspended--;
1324 	if (pmu_suspended > 0) {
1325 		spin_unlock_irqrestore(&pmu_lock, flags);
1326 		return;
1327 	}
1328 	adb_int_pending = 1;
1329 	if (gpio_irq >= 0)
1330 		enable_irq(gpio_irq);
1331 	out_8(&via[IER], CB1_INT | IER_SET);
1332 	spin_unlock_irqrestore(&pmu_lock, flags);
1333 	pmu_poll();
1334 }
1335 
1336 /* Interrupt data could be the result data from an ADB cmd */
1337 static void
1338 pmu_handle_data(unsigned char *data, int len)
1339 {
1340 	unsigned char ints, pirq;
1341 	int i = 0;
1342 
1343 	asleep = 0;
1344 	if (drop_interrupts || len < 1) {
1345 		adb_int_pending = 0;
1346 		pmu_irq_stats[8]++;
1347 		return;
1348 	}
1349 
1350 	/* Get PMU interrupt mask */
1351 	ints = data[0];
1352 
1353 	/* Record zero interrupts for stats */
1354 	if (ints == 0)
1355 		pmu_irq_stats[9]++;
1356 
1357 	/* Hack to deal with ADB autopoll flag */
1358 	if (ints & PMU_INT_ADB)
1359 		ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1360 
1361 next:
1362 
1363 	if (ints == 0) {
1364 		if (i > pmu_irq_stats[10])
1365 			pmu_irq_stats[10] = i;
1366 		return;
1367 	}
1368 
1369 	for (pirq = 0; pirq < 8; pirq++)
1370 		if (ints & (1 << pirq))
1371 			break;
1372 	pmu_irq_stats[pirq]++;
1373 	i++;
1374 	ints &= ~(1 << pirq);
1375 
1376 	/* Note: for some reason, we get an interrupt with len=1,
1377 	 * data[0]==0 after each normal ADB interrupt, at least
1378 	 * on the Pismo. Still investigating...  --BenH
1379 	 */
1380 	if ((1 << pirq) & PMU_INT_ADB) {
1381 		if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1382 			struct adb_request *req = req_awaiting_reply;
1383 			if (req == 0) {
1384 				printk(KERN_ERR "PMU: extra ADB reply\n");
1385 				return;
1386 			}
1387 			req_awaiting_reply = NULL;
1388 			if (len <= 2)
1389 				req->reply_len = 0;
1390 			else {
1391 				memcpy(req->reply, data + 1, len - 1);
1392 				req->reply_len = len - 1;
1393 			}
1394 			pmu_done(req);
1395 		} else {
1396 			if (len == 4 && data[1] == 0x2c) {
1397 				extern int xmon_wants_key, xmon_adb_keycode;
1398 				if (xmon_wants_key) {
1399 					xmon_adb_keycode = data[2];
1400 					return;
1401 				}
1402 			}
1403 #ifdef CONFIG_ADB
1404 			/*
1405 			 * XXX On the [23]400 the PMU gives us an up
1406 			 * event for keycodes 0x74 or 0x75 when the PC
1407 			 * card eject buttons are released, so we
1408 			 * ignore those events.
1409 			 */
1410 			if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1411 			      && data[1] == 0x2c && data[3] == 0xff
1412 			      && (data[2] & ~1) == 0xf4))
1413 				adb_input(data+1, len-1, 1);
1414 #endif /* CONFIG_ADB */
1415 		}
1416 	}
1417 	/* Sound/brightness button pressed */
1418 	else if ((1 << pirq) & PMU_INT_SNDBRT) {
1419 #ifdef CONFIG_PMAC_BACKLIGHT
1420 		if (len == 3)
1421 			pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1422 #endif
1423 	}
1424 	/* Tick interrupt */
1425 	else if ((1 << pirq) & PMU_INT_TICK) {
1426 		/* Environement or tick interrupt, query batteries */
1427 		if (pmu_battery_count) {
1428 			if ((--query_batt_timer) == 0) {
1429 				query_battery_state();
1430 				query_batt_timer = BATTERY_POLLING_COUNT;
1431 			}
1432 		}
1433         }
1434 	else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1435 		if (pmu_battery_count)
1436 			query_battery_state();
1437 		pmu_pass_intr(data, len);
1438 		/* len == 6 is probably a bad check. But how do I
1439 		 * know what PMU versions send what events here? */
1440 		if (len == 6) {
1441 			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1442 			via_pmu_event(PMU_EVT_LID, data[1]&1);
1443 		}
1444 	} else {
1445 	       pmu_pass_intr(data, len);
1446 	}
1447 	goto next;
1448 }
1449 
1450 static struct adb_request*
1451 pmu_sr_intr(void)
1452 {
1453 	struct adb_request *req;
1454 	int bite = 0;
1455 
1456 	if (via[B] & TREQ) {
1457 		printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1458 		out_8(&via[IFR], SR_INT);
1459 		return NULL;
1460 	}
1461 	/* The ack may not yet be low when we get the interrupt */
1462 	while ((in_8(&via[B]) & TACK) != 0)
1463 			;
1464 
1465 	/* if reading grab the byte, and reset the interrupt */
1466 	if (pmu_state == reading || pmu_state == reading_intr)
1467 		bite = in_8(&via[SR]);
1468 
1469 	/* reset TREQ and wait for TACK to go high */
1470 	out_8(&via[B], in_8(&via[B]) | TREQ);
1471 	wait_for_ack();
1472 
1473 	switch (pmu_state) {
1474 	case sending:
1475 		req = current_req;
1476 		if (data_len < 0) {
1477 			data_len = req->nbytes - 1;
1478 			send_byte(data_len);
1479 			break;
1480 		}
1481 		if (data_index <= data_len) {
1482 			send_byte(req->data[data_index++]);
1483 			break;
1484 		}
1485 		req->sent = 1;
1486 		data_len = pmu_data_len[req->data[0]][1];
1487 		if (data_len == 0) {
1488 			pmu_state = idle;
1489 			current_req = req->next;
1490 			if (req->reply_expected)
1491 				req_awaiting_reply = req;
1492 			else
1493 				return req;
1494 		} else {
1495 			pmu_state = reading;
1496 			data_index = 0;
1497 			reply_ptr = req->reply + req->reply_len;
1498 			recv_byte();
1499 		}
1500 		break;
1501 
1502 	case intack:
1503 		data_index = 0;
1504 		data_len = -1;
1505 		pmu_state = reading_intr;
1506 		reply_ptr = interrupt_data[int_data_last];
1507 		recv_byte();
1508 		if (gpio_irq >= 0 && !gpio_irq_enabled) {
1509 			enable_irq(gpio_irq);
1510 			gpio_irq_enabled = 1;
1511 		}
1512 		break;
1513 
1514 	case reading:
1515 	case reading_intr:
1516 		if (data_len == -1) {
1517 			data_len = bite;
1518 			if (bite > 32)
1519 				printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1520 		} else if (data_index < 32) {
1521 			reply_ptr[data_index++] = bite;
1522 		}
1523 		if (data_index < data_len) {
1524 			recv_byte();
1525 			break;
1526 		}
1527 
1528 		if (pmu_state == reading_intr) {
1529 			pmu_state = idle;
1530 			int_data_state[int_data_last] = int_data_ready;
1531 			interrupt_data_len[int_data_last] = data_len;
1532 		} else {
1533 			req = current_req;
1534 			/*
1535 			 * For PMU sleep and freq change requests, we lock the
1536 			 * PMU until it's explicitly unlocked. This avoids any
1537 			 * spurrious event polling getting in
1538 			 */
1539 			current_req = req->next;
1540 			req->reply_len += data_index;
1541 			if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1542 				pmu_state = locked;
1543 			else
1544 				pmu_state = idle;
1545 			return req;
1546 		}
1547 		break;
1548 
1549 	default:
1550 		printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1551 		       pmu_state);
1552 	}
1553 	return NULL;
1554 }
1555 
1556 static irqreturn_t
1557 via_pmu_interrupt(int irq, void *arg)
1558 {
1559 	unsigned long flags;
1560 	int intr;
1561 	int nloop = 0;
1562 	int int_data = -1;
1563 	struct adb_request *req = NULL;
1564 	int handled = 0;
1565 
1566 	/* This is a bit brutal, we can probably do better */
1567 	spin_lock_irqsave(&pmu_lock, flags);
1568 	++disable_poll;
1569 
1570 	for (;;) {
1571 		intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1572 		if (intr == 0)
1573 			break;
1574 		handled = 1;
1575 		if (++nloop > 1000) {
1576 			printk(KERN_DEBUG "PMU: stuck in intr loop, "
1577 			       "intr=%x, ier=%x pmu_state=%d\n",
1578 			       intr, in_8(&via[IER]), pmu_state);
1579 			break;
1580 		}
1581 		out_8(&via[IFR], intr);
1582 		if (intr & CB1_INT) {
1583 			adb_int_pending = 1;
1584 			pmu_irq_stats[0]++;
1585 		}
1586 		if (intr & SR_INT) {
1587 			req = pmu_sr_intr();
1588 			if (req)
1589 				break;
1590 		}
1591 	}
1592 
1593 recheck:
1594 	if (pmu_state == idle) {
1595 		if (adb_int_pending) {
1596 			if (int_data_state[0] == int_data_empty)
1597 				int_data_last = 0;
1598 			else if (int_data_state[1] == int_data_empty)
1599 				int_data_last = 1;
1600 			else
1601 				goto no_free_slot;
1602 			pmu_state = intack;
1603 			int_data_state[int_data_last] = int_data_fill;
1604 			/* Sounds safer to make sure ACK is high before writing.
1605 			 * This helped kill a problem with ADB and some iBooks
1606 			 */
1607 			wait_for_ack();
1608 			send_byte(PMU_INT_ACK);
1609 			adb_int_pending = 0;
1610 		} else if (current_req)
1611 			pmu_start();
1612 	}
1613 no_free_slot:
1614 	/* Mark the oldest buffer for flushing */
1615 	if (int_data_state[!int_data_last] == int_data_ready) {
1616 		int_data_state[!int_data_last] = int_data_flush;
1617 		int_data = !int_data_last;
1618 	} else if (int_data_state[int_data_last] == int_data_ready) {
1619 		int_data_state[int_data_last] = int_data_flush;
1620 		int_data = int_data_last;
1621 	}
1622 	--disable_poll;
1623 	spin_unlock_irqrestore(&pmu_lock, flags);
1624 
1625 	/* Deal with completed PMU requests outside of the lock */
1626 	if (req) {
1627 		pmu_done(req);
1628 		req = NULL;
1629 	}
1630 
1631 	/* Deal with interrupt datas outside of the lock */
1632 	if (int_data >= 0) {
1633 		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1634 		spin_lock_irqsave(&pmu_lock, flags);
1635 		++disable_poll;
1636 		int_data_state[int_data] = int_data_empty;
1637 		int_data = -1;
1638 		goto recheck;
1639 	}
1640 
1641 	return IRQ_RETVAL(handled);
1642 }
1643 
1644 void
1645 pmu_unlock(void)
1646 {
1647 	unsigned long flags;
1648 
1649 	spin_lock_irqsave(&pmu_lock, flags);
1650 	if (pmu_state == locked)
1651 		pmu_state = idle;
1652 	adb_int_pending = 1;
1653 	spin_unlock_irqrestore(&pmu_lock, flags);
1654 }
1655 
1656 
1657 static irqreturn_t
1658 gpio1_interrupt(int irq, void *arg)
1659 {
1660 	unsigned long flags;
1661 
1662 	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1663 		spin_lock_irqsave(&pmu_lock, flags);
1664 		if (gpio_irq_enabled > 0) {
1665 			disable_irq_nosync(gpio_irq);
1666 			gpio_irq_enabled = 0;
1667 		}
1668 		pmu_irq_stats[1]++;
1669 		adb_int_pending = 1;
1670 		spin_unlock_irqrestore(&pmu_lock, flags);
1671 		via_pmu_interrupt(0, NULL);
1672 		return IRQ_HANDLED;
1673 	}
1674 	return IRQ_NONE;
1675 }
1676 
1677 void
1678 pmu_enable_irled(int on)
1679 {
1680 	struct adb_request req;
1681 
1682 	if (vias == NULL)
1683 		return ;
1684 	if (pmu_kind == PMU_KEYLARGO_BASED)
1685 		return ;
1686 
1687 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1688 	    (on ? PMU_POW_ON : PMU_POW_OFF));
1689 	pmu_wait_complete(&req);
1690 }
1691 
1692 void
1693 pmu_restart(void)
1694 {
1695 	struct adb_request req;
1696 
1697 	if (via == NULL)
1698 		return;
1699 
1700 	local_irq_disable();
1701 
1702 	drop_interrupts = 1;
1703 
1704 	if (pmu_kind != PMU_KEYLARGO_BASED) {
1705 		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1706 						PMU_INT_TICK );
1707 		while(!req.complete)
1708 			pmu_poll();
1709 	}
1710 
1711 	pmu_request(&req, NULL, 1, PMU_RESET);
1712 	pmu_wait_complete(&req);
1713 	for (;;)
1714 		;
1715 }
1716 
1717 void
1718 pmu_shutdown(void)
1719 {
1720 	struct adb_request req;
1721 
1722 	if (via == NULL)
1723 		return;
1724 
1725 	local_irq_disable();
1726 
1727 	drop_interrupts = 1;
1728 
1729 	if (pmu_kind != PMU_KEYLARGO_BASED) {
1730 		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1731 						PMU_INT_TICK );
1732 		pmu_wait_complete(&req);
1733 	} else {
1734 		/* Disable server mode on shutdown or we'll just
1735 		 * wake up again
1736 		 */
1737 		pmu_set_server_mode(0);
1738 	}
1739 
1740 	pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1741 		    'M', 'A', 'T', 'T');
1742 	pmu_wait_complete(&req);
1743 	for (;;)
1744 		;
1745 }
1746 
1747 int
1748 pmu_present(void)
1749 {
1750 	return via != 0;
1751 }
1752 
1753 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1754 /*
1755  * Put the powerbook to sleep.
1756  */
1757 
1758 static u32 save_via[8];
1759 
1760 static void
1761 save_via_state(void)
1762 {
1763 	save_via[0] = in_8(&via[ANH]);
1764 	save_via[1] = in_8(&via[DIRA]);
1765 	save_via[2] = in_8(&via[B]);
1766 	save_via[3] = in_8(&via[DIRB]);
1767 	save_via[4] = in_8(&via[PCR]);
1768 	save_via[5] = in_8(&via[ACR]);
1769 	save_via[6] = in_8(&via[T1CL]);
1770 	save_via[7] = in_8(&via[T1CH]);
1771 }
1772 static void
1773 restore_via_state(void)
1774 {
1775 	out_8(&via[ANH], save_via[0]);
1776 	out_8(&via[DIRA], save_via[1]);
1777 	out_8(&via[B], save_via[2]);
1778 	out_8(&via[DIRB], save_via[3]);
1779 	out_8(&via[PCR], save_via[4]);
1780 	out_8(&via[ACR], save_via[5]);
1781 	out_8(&via[T1CL], save_via[6]);
1782 	out_8(&via[T1CH], save_via[7]);
1783 	out_8(&via[IER], IER_CLR | 0x7f);	/* disable all intrs */
1784 	out_8(&via[IFR], 0x7f);				/* clear IFR */
1785 	out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1786 }
1787 
1788 #define	GRACKLE_PM	(1<<7)
1789 #define GRACKLE_DOZE	(1<<5)
1790 #define	GRACKLE_NAP	(1<<4)
1791 #define	GRACKLE_SLEEP	(1<<3)
1792 
1793 static int powerbook_sleep_grackle(void)
1794 {
1795 	unsigned long save_l2cr;
1796 	unsigned short pmcr1;
1797 	struct adb_request req;
1798 	struct pci_dev *grackle;
1799 
1800 	grackle = pci_get_bus_and_slot(0, 0);
1801 	if (!grackle)
1802 		return -ENODEV;
1803 
1804 	/* Turn off various things. Darwin does some retry tests here... */
1805 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1806 	pmu_wait_complete(&req);
1807 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1808 		PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1809 	pmu_wait_complete(&req);
1810 
1811 	/* For 750, save backside cache setting and disable it */
1812 	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1813 
1814 	if (!__fake_sleep) {
1815 		/* Ask the PMU to put us to sleep */
1816 		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1817 		pmu_wait_complete(&req);
1818 	}
1819 
1820 	/* The VIA is supposed not to be restored correctly*/
1821 	save_via_state();
1822 	/* We shut down some HW */
1823 	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1824 
1825 	pci_read_config_word(grackle, 0x70, &pmcr1);
1826 	/* Apparently, MacOS uses NAP mode for Grackle ??? */
1827 	pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1828 	pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1829 	pci_write_config_word(grackle, 0x70, pmcr1);
1830 
1831 	/* Call low-level ASM sleep handler */
1832 	if (__fake_sleep)
1833 		mdelay(5000);
1834 	else
1835 		low_sleep_handler();
1836 
1837 	/* We're awake again, stop grackle PM */
1838 	pci_read_config_word(grackle, 0x70, &pmcr1);
1839 	pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1840 	pci_write_config_word(grackle, 0x70, pmcr1);
1841 
1842 	pci_dev_put(grackle);
1843 
1844 	/* Make sure the PMU is idle */
1845 	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1846 	restore_via_state();
1847 
1848 	/* Restore L2 cache */
1849 	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1850  		_set_L2CR(save_l2cr);
1851 
1852 	/* Restore userland MMU context */
1853 	switch_mmu_context(NULL, current->active_mm);
1854 
1855 	/* Power things up */
1856 	pmu_unlock();
1857 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1858 	pmu_wait_complete(&req);
1859 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1860 			PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1861 	pmu_wait_complete(&req);
1862 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1863 			PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1864 	pmu_wait_complete(&req);
1865 
1866 	return 0;
1867 }
1868 
1869 static int
1870 powerbook_sleep_Core99(void)
1871 {
1872 	unsigned long save_l2cr;
1873 	unsigned long save_l3cr;
1874 	struct adb_request req;
1875 
1876 	if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1877 		printk(KERN_ERR "Sleep mode not supported on this machine\n");
1878 		return -ENOSYS;
1879 	}
1880 
1881 	if (num_online_cpus() > 1 || cpu_is_offline(0))
1882 		return -EAGAIN;
1883 
1884 	/* Stop environment and ADB interrupts */
1885 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1886 	pmu_wait_complete(&req);
1887 
1888 	/* Tell PMU what events will wake us up */
1889 	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1890 		0xff, 0xff);
1891 	pmu_wait_complete(&req);
1892 	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1893 		0, PMU_PWR_WAKEUP_KEY |
1894 		(option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1895 	pmu_wait_complete(&req);
1896 
1897 	/* Save the state of the L2 and L3 caches */
1898 	save_l3cr = _get_L3CR();	/* (returns -1 if not available) */
1899 	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1900 
1901 	if (!__fake_sleep) {
1902 		/* Ask the PMU to put us to sleep */
1903 		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1904 		pmu_wait_complete(&req);
1905 	}
1906 
1907 	/* The VIA is supposed not to be restored correctly*/
1908 	save_via_state();
1909 
1910 	/* Shut down various ASICs. There's a chance that we can no longer
1911 	 * talk to the PMU after this, so I moved it to _after_ sending the
1912 	 * sleep command to it. Still need to be checked.
1913 	 */
1914 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1915 
1916 	/* Call low-level ASM sleep handler */
1917 	if (__fake_sleep)
1918 		mdelay(5000);
1919 	else
1920 		low_sleep_handler();
1921 
1922 	/* Restore Apple core ASICs state */
1923 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1924 
1925 	/* Restore VIA */
1926 	restore_via_state();
1927 
1928 	/* tweak LPJ before cpufreq is there */
1929 	loops_per_jiffy *= 2;
1930 
1931 	/* Restore video */
1932 	pmac_call_early_video_resume();
1933 
1934 	/* Restore L2 cache */
1935 	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1936  		_set_L2CR(save_l2cr);
1937 	/* Restore L3 cache */
1938 	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1939  		_set_L3CR(save_l3cr);
1940 
1941 	/* Restore userland MMU context */
1942 	switch_mmu_context(NULL, current->active_mm);
1943 
1944 	/* Tell PMU we are ready */
1945 	pmu_unlock();
1946 	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1947 	pmu_wait_complete(&req);
1948 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1949 	pmu_wait_complete(&req);
1950 
1951 	/* Restore LPJ, cpufreq will adjust the cpu frequency */
1952 	loops_per_jiffy /= 2;
1953 
1954 	return 0;
1955 }
1956 
1957 #define PB3400_MEM_CTRL		0xf8000000
1958 #define PB3400_MEM_CTRL_SLEEP	0x70
1959 
1960 static void __iomem *pb3400_mem_ctrl;
1961 
1962 static void powerbook_sleep_init_3400(void)
1963 {
1964 	/* map in the memory controller registers */
1965 	pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1966 	if (pb3400_mem_ctrl == NULL)
1967 		printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1968 }
1969 
1970 static int powerbook_sleep_3400(void)
1971 {
1972 	int i, x;
1973 	unsigned int hid0;
1974 	unsigned long msr;
1975 	struct adb_request sleep_req;
1976 	unsigned int __iomem *mem_ctrl_sleep;
1977 
1978 	if (pb3400_mem_ctrl == NULL)
1979 		return -ENOMEM;
1980 	mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1981 
1982 	/* Set the memory controller to keep the memory refreshed
1983 	   while we're asleep */
1984 	for (i = 0x403f; i >= 0x4000; --i) {
1985 		out_be32(mem_ctrl_sleep, i);
1986 		do {
1987 			x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1988 		} while (x == 0);
1989 		if (x >= 0x100)
1990 			break;
1991 	}
1992 
1993 	/* Ask the PMU to put us to sleep */
1994 	pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1995 	pmu_wait_complete(&sleep_req);
1996 	pmu_unlock();
1997 
1998 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1999 
2000 	asleep = 1;
2001 
2002 	/* Put the CPU into sleep mode */
2003 	hid0 = mfspr(SPRN_HID0);
2004 	hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2005 	mtspr(SPRN_HID0, hid0);
2006 	local_irq_enable();
2007 	msr = mfmsr() | MSR_POW;
2008 	while (asleep) {
2009 		mb();
2010 		mtmsr(msr);
2011 		isync();
2012 	}
2013 	local_irq_disable();
2014 
2015 	/* OK, we're awake again, start restoring things */
2016 	out_be32(mem_ctrl_sleep, 0x3f);
2017 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2018 
2019 	return 0;
2020 }
2021 
2022 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2023 
2024 /*
2025  * Support for /dev/pmu device
2026  */
2027 #define RB_SIZE		0x10
2028 struct pmu_private {
2029 	struct list_head list;
2030 	int	rb_get;
2031 	int	rb_put;
2032 	struct rb_entry {
2033 		unsigned short len;
2034 		unsigned char data[16];
2035 	}	rb_buf[RB_SIZE];
2036 	wait_queue_head_t wait;
2037 	spinlock_t lock;
2038 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2039 	int	backlight_locker;
2040 #endif
2041 };
2042 
2043 static LIST_HEAD(all_pmu_pvt);
2044 static DEFINE_SPINLOCK(all_pvt_lock);
2045 
2046 static void
2047 pmu_pass_intr(unsigned char *data, int len)
2048 {
2049 	struct pmu_private *pp;
2050 	struct list_head *list;
2051 	int i;
2052 	unsigned long flags;
2053 
2054 	if (len > sizeof(pp->rb_buf[0].data))
2055 		len = sizeof(pp->rb_buf[0].data);
2056 	spin_lock_irqsave(&all_pvt_lock, flags);
2057 	for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2058 		pp = list_entry(list, struct pmu_private, list);
2059 		spin_lock(&pp->lock);
2060 		i = pp->rb_put + 1;
2061 		if (i >= RB_SIZE)
2062 			i = 0;
2063 		if (i != pp->rb_get) {
2064 			struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2065 			rp->len = len;
2066 			memcpy(rp->data, data, len);
2067 			pp->rb_put = i;
2068 			wake_up_interruptible(&pp->wait);
2069 		}
2070 		spin_unlock(&pp->lock);
2071 	}
2072 	spin_unlock_irqrestore(&all_pvt_lock, flags);
2073 }
2074 
2075 static int
2076 pmu_open(struct inode *inode, struct file *file)
2077 {
2078 	struct pmu_private *pp;
2079 	unsigned long flags;
2080 
2081 	pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2082 	if (pp == 0)
2083 		return -ENOMEM;
2084 	pp->rb_get = pp->rb_put = 0;
2085 	spin_lock_init(&pp->lock);
2086 	init_waitqueue_head(&pp->wait);
2087 	mutex_lock(&pmu_info_proc_mutex);
2088 	spin_lock_irqsave(&all_pvt_lock, flags);
2089 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2090 	pp->backlight_locker = 0;
2091 #endif
2092 	list_add(&pp->list, &all_pmu_pvt);
2093 	spin_unlock_irqrestore(&all_pvt_lock, flags);
2094 	file->private_data = pp;
2095 	mutex_unlock(&pmu_info_proc_mutex);
2096 	return 0;
2097 }
2098 
2099 static ssize_t
2100 pmu_read(struct file *file, char __user *buf,
2101 			size_t count, loff_t *ppos)
2102 {
2103 	struct pmu_private *pp = file->private_data;
2104 	DECLARE_WAITQUEUE(wait, current);
2105 	unsigned long flags;
2106 	int ret = 0;
2107 
2108 	if (count < 1 || pp == 0)
2109 		return -EINVAL;
2110 	if (!access_ok(VERIFY_WRITE, buf, count))
2111 		return -EFAULT;
2112 
2113 	spin_lock_irqsave(&pp->lock, flags);
2114 	add_wait_queue(&pp->wait, &wait);
2115 	set_current_state(TASK_INTERRUPTIBLE);
2116 
2117 	for (;;) {
2118 		ret = -EAGAIN;
2119 		if (pp->rb_get != pp->rb_put) {
2120 			int i = pp->rb_get;
2121 			struct rb_entry *rp = &pp->rb_buf[i];
2122 			ret = rp->len;
2123 			spin_unlock_irqrestore(&pp->lock, flags);
2124 			if (ret > count)
2125 				ret = count;
2126 			if (ret > 0 && copy_to_user(buf, rp->data, ret))
2127 				ret = -EFAULT;
2128 			if (++i >= RB_SIZE)
2129 				i = 0;
2130 			spin_lock_irqsave(&pp->lock, flags);
2131 			pp->rb_get = i;
2132 		}
2133 		if (ret >= 0)
2134 			break;
2135 		if (file->f_flags & O_NONBLOCK)
2136 			break;
2137 		ret = -ERESTARTSYS;
2138 		if (signal_pending(current))
2139 			break;
2140 		spin_unlock_irqrestore(&pp->lock, flags);
2141 		schedule();
2142 		spin_lock_irqsave(&pp->lock, flags);
2143 	}
2144 	__set_current_state(TASK_RUNNING);
2145 	remove_wait_queue(&pp->wait, &wait);
2146 	spin_unlock_irqrestore(&pp->lock, flags);
2147 
2148 	return ret;
2149 }
2150 
2151 static ssize_t
2152 pmu_write(struct file *file, const char __user *buf,
2153 			 size_t count, loff_t *ppos)
2154 {
2155 	return 0;
2156 }
2157 
2158 static unsigned int
2159 pmu_fpoll(struct file *filp, poll_table *wait)
2160 {
2161 	struct pmu_private *pp = filp->private_data;
2162 	unsigned int mask = 0;
2163 	unsigned long flags;
2164 
2165 	if (pp == 0)
2166 		return 0;
2167 	poll_wait(filp, &pp->wait, wait);
2168 	spin_lock_irqsave(&pp->lock, flags);
2169 	if (pp->rb_get != pp->rb_put)
2170 		mask |= POLLIN;
2171 	spin_unlock_irqrestore(&pp->lock, flags);
2172 	return mask;
2173 }
2174 
2175 static int
2176 pmu_release(struct inode *inode, struct file *file)
2177 {
2178 	struct pmu_private *pp = file->private_data;
2179 	unsigned long flags;
2180 
2181 	if (pp != 0) {
2182 		file->private_data = NULL;
2183 		spin_lock_irqsave(&all_pvt_lock, flags);
2184 		list_del(&pp->list);
2185 		spin_unlock_irqrestore(&all_pvt_lock, flags);
2186 
2187 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2188 		if (pp->backlight_locker)
2189 			pmac_backlight_enable();
2190 #endif
2191 
2192 		kfree(pp);
2193 	}
2194 	return 0;
2195 }
2196 
2197 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2198 static void pmac_suspend_disable_irqs(void)
2199 {
2200 	/* Call platform functions marked "on sleep" */
2201 	pmac_pfunc_i2c_suspend();
2202 	pmac_pfunc_base_suspend();
2203 }
2204 
2205 static int powerbook_sleep(suspend_state_t state)
2206 {
2207 	int error = 0;
2208 
2209 	/* Wait for completion of async requests */
2210 	while (!batt_req.complete)
2211 		pmu_poll();
2212 
2213 	/* Giveup the lazy FPU & vec so we don't have to back them
2214 	 * up from the low level code
2215 	 */
2216 	enable_kernel_fp();
2217 
2218 #ifdef CONFIG_ALTIVEC
2219 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
2220 		enable_kernel_altivec();
2221 #endif /* CONFIG_ALTIVEC */
2222 
2223 	switch (pmu_kind) {
2224 	case PMU_OHARE_BASED:
2225 		error = powerbook_sleep_3400();
2226 		break;
2227 	case PMU_HEATHROW_BASED:
2228 	case PMU_PADDINGTON_BASED:
2229 		error = powerbook_sleep_grackle();
2230 		break;
2231 	case PMU_KEYLARGO_BASED:
2232 		error = powerbook_sleep_Core99();
2233 		break;
2234 	default:
2235 		return -ENOSYS;
2236 	}
2237 
2238 	if (error)
2239 		return error;
2240 
2241 	mdelay(100);
2242 
2243 	return 0;
2244 }
2245 
2246 static void pmac_suspend_enable_irqs(void)
2247 {
2248 	/* Force a poll of ADB interrupts */
2249 	adb_int_pending = 1;
2250 	via_pmu_interrupt(0, NULL);
2251 
2252 	mdelay(10);
2253 
2254 	/* Call platform functions marked "on wake" */
2255 	pmac_pfunc_base_resume();
2256 	pmac_pfunc_i2c_resume();
2257 }
2258 
2259 static int pmu_sleep_valid(suspend_state_t state)
2260 {
2261 	return state == PM_SUSPEND_MEM
2262 		&& (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2263 }
2264 
2265 static const struct platform_suspend_ops pmu_pm_ops = {
2266 	.enter = powerbook_sleep,
2267 	.valid = pmu_sleep_valid,
2268 };
2269 
2270 static int register_pmu_pm_ops(void)
2271 {
2272 	if (pmu_kind == PMU_OHARE_BASED)
2273 		powerbook_sleep_init_3400();
2274 	ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2275 	ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2276 	suspend_set_ops(&pmu_pm_ops);
2277 
2278 	return 0;
2279 }
2280 
2281 device_initcall(register_pmu_pm_ops);
2282 #endif
2283 
2284 static int pmu_ioctl(struct file *filp,
2285 		     u_int cmd, u_long arg)
2286 {
2287 	__u32 __user *argp = (__u32 __user *)arg;
2288 	int error = -EINVAL;
2289 
2290 	switch (cmd) {
2291 	case PMU_IOC_SLEEP:
2292 		if (!capable(CAP_SYS_ADMIN))
2293 			return -EACCES;
2294 		return pm_suspend(PM_SUSPEND_MEM);
2295 	case PMU_IOC_CAN_SLEEP:
2296 		if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2297 			return put_user(0, argp);
2298 		else
2299 			return put_user(1, argp);
2300 
2301 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2302 	/* Compatibility ioctl's for backlight */
2303 	case PMU_IOC_GET_BACKLIGHT:
2304 	{
2305 		int brightness;
2306 
2307 		brightness = pmac_backlight_get_legacy_brightness();
2308 		if (brightness < 0)
2309 			return brightness;
2310 		else
2311 			return put_user(brightness, argp);
2312 
2313 	}
2314 	case PMU_IOC_SET_BACKLIGHT:
2315 	{
2316 		int brightness;
2317 
2318 		error = get_user(brightness, argp);
2319 		if (error)
2320 			return error;
2321 
2322 		return pmac_backlight_set_legacy_brightness(brightness);
2323 	}
2324 #ifdef CONFIG_INPUT_ADBHID
2325 	case PMU_IOC_GRAB_BACKLIGHT: {
2326 		struct pmu_private *pp = filp->private_data;
2327 
2328 		if (pp->backlight_locker)
2329 			return 0;
2330 
2331 		pp->backlight_locker = 1;
2332 		pmac_backlight_disable();
2333 
2334 		return 0;
2335 	}
2336 #endif /* CONFIG_INPUT_ADBHID */
2337 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2338 
2339 	case PMU_IOC_GET_MODEL:
2340 	    	return put_user(pmu_kind, argp);
2341 	case PMU_IOC_HAS_ADB:
2342 		return put_user(pmu_has_adb, argp);
2343 	}
2344 	return error;
2345 }
2346 
2347 static long pmu_unlocked_ioctl(struct file *filp,
2348 			       u_int cmd, u_long arg)
2349 {
2350 	int ret;
2351 
2352 	mutex_lock(&pmu_info_proc_mutex);
2353 	ret = pmu_ioctl(filp, cmd, arg);
2354 	mutex_unlock(&pmu_info_proc_mutex);
2355 
2356 	return ret;
2357 }
2358 
2359 #ifdef CONFIG_COMPAT
2360 #define PMU_IOC_GET_BACKLIGHT32	_IOR('B', 1, compat_size_t)
2361 #define PMU_IOC_SET_BACKLIGHT32	_IOW('B', 2, compat_size_t)
2362 #define PMU_IOC_GET_MODEL32	_IOR('B', 3, compat_size_t)
2363 #define PMU_IOC_HAS_ADB32	_IOR('B', 4, compat_size_t)
2364 #define PMU_IOC_CAN_SLEEP32	_IOR('B', 5, compat_size_t)
2365 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2366 
2367 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2368 {
2369 	switch (cmd) {
2370 	case PMU_IOC_SLEEP:
2371 		break;
2372 	case PMU_IOC_GET_BACKLIGHT32:
2373 		cmd = PMU_IOC_GET_BACKLIGHT;
2374 		break;
2375 	case PMU_IOC_SET_BACKLIGHT32:
2376 		cmd = PMU_IOC_SET_BACKLIGHT;
2377 		break;
2378 	case PMU_IOC_GET_MODEL32:
2379 		cmd = PMU_IOC_GET_MODEL;
2380 		break;
2381 	case PMU_IOC_HAS_ADB32:
2382 		cmd = PMU_IOC_HAS_ADB;
2383 		break;
2384 	case PMU_IOC_CAN_SLEEP32:
2385 		cmd = PMU_IOC_CAN_SLEEP;
2386 		break;
2387 	case PMU_IOC_GRAB_BACKLIGHT32:
2388 		cmd = PMU_IOC_GRAB_BACKLIGHT;
2389 		break;
2390 	default:
2391 		return -ENOIOCTLCMD;
2392 	}
2393 	return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2394 }
2395 #endif
2396 
2397 static const struct file_operations pmu_device_fops = {
2398 	.read		= pmu_read,
2399 	.write		= pmu_write,
2400 	.poll		= pmu_fpoll,
2401 	.unlocked_ioctl	= pmu_unlocked_ioctl,
2402 #ifdef CONFIG_COMPAT
2403 	.compat_ioctl	= compat_pmu_ioctl,
2404 #endif
2405 	.open		= pmu_open,
2406 	.release	= pmu_release,
2407 	.llseek		= noop_llseek,
2408 };
2409 
2410 static struct miscdevice pmu_device = {
2411 	PMU_MINOR, "pmu", &pmu_device_fops
2412 };
2413 
2414 static int pmu_device_init(void)
2415 {
2416 	if (!via)
2417 		return 0;
2418 	if (misc_register(&pmu_device) < 0)
2419 		printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2420 	return 0;
2421 }
2422 device_initcall(pmu_device_init);
2423 
2424 
2425 #ifdef DEBUG_SLEEP
2426 static inline void
2427 polled_handshake(volatile unsigned char __iomem *via)
2428 {
2429 	via[B] &= ~TREQ; eieio();
2430 	while ((via[B] & TACK) != 0)
2431 		;
2432 	via[B] |= TREQ; eieio();
2433 	while ((via[B] & TACK) == 0)
2434 		;
2435 }
2436 
2437 static inline void
2438 polled_send_byte(volatile unsigned char __iomem *via, int x)
2439 {
2440 	via[ACR] |= SR_OUT | SR_EXT; eieio();
2441 	via[SR] = x; eieio();
2442 	polled_handshake(via);
2443 }
2444 
2445 static inline int
2446 polled_recv_byte(volatile unsigned char __iomem *via)
2447 {
2448 	int x;
2449 
2450 	via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2451 	x = via[SR]; eieio();
2452 	polled_handshake(via);
2453 	x = via[SR]; eieio();
2454 	return x;
2455 }
2456 
2457 int
2458 pmu_polled_request(struct adb_request *req)
2459 {
2460 	unsigned long flags;
2461 	int i, l, c;
2462 	volatile unsigned char __iomem *v = via;
2463 
2464 	req->complete = 1;
2465 	c = req->data[0];
2466 	l = pmu_data_len[c][0];
2467 	if (l >= 0 && req->nbytes != l + 1)
2468 		return -EINVAL;
2469 
2470 	local_irq_save(flags);
2471 	while (pmu_state != idle)
2472 		pmu_poll();
2473 
2474 	while ((via[B] & TACK) == 0)
2475 		;
2476 	polled_send_byte(v, c);
2477 	if (l < 0) {
2478 		l = req->nbytes - 1;
2479 		polled_send_byte(v, l);
2480 	}
2481 	for (i = 1; i <= l; ++i)
2482 		polled_send_byte(v, req->data[i]);
2483 
2484 	l = pmu_data_len[c][1];
2485 	if (l < 0)
2486 		l = polled_recv_byte(v);
2487 	for (i = 0; i < l; ++i)
2488 		req->reply[i + req->reply_len] = polled_recv_byte(v);
2489 
2490 	if (req->done)
2491 		(*req->done)(req);
2492 
2493 	local_irq_restore(flags);
2494 	return 0;
2495 }
2496 
2497 /* N.B. This doesn't work on the 3400 */
2498 void pmu_blink(int n)
2499 {
2500 	struct adb_request req;
2501 
2502 	memset(&req, 0, sizeof(req));
2503 
2504 	for (; n > 0; --n) {
2505 		req.nbytes = 4;
2506 		req.done = NULL;
2507 		req.data[0] = 0xee;
2508 		req.data[1] = 4;
2509 		req.data[2] = 0;
2510 		req.data[3] = 1;
2511 		req.reply[0] = ADB_RET_OK;
2512 		req.reply_len = 1;
2513 		req.reply_expected = 0;
2514 		pmu_polled_request(&req);
2515 		mdelay(50);
2516 		req.nbytes = 4;
2517 		req.done = NULL;
2518 		req.data[0] = 0xee;
2519 		req.data[1] = 4;
2520 		req.data[2] = 0;
2521 		req.data[3] = 0;
2522 		req.reply[0] = ADB_RET_OK;
2523 		req.reply_len = 1;
2524 		req.reply_expected = 0;
2525 		pmu_polled_request(&req);
2526 		mdelay(50);
2527 	}
2528 	mdelay(50);
2529 }
2530 #endif /* DEBUG_SLEEP */
2531 
2532 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2533 int pmu_sys_suspended;
2534 
2535 static int pmu_syscore_suspend(void)
2536 {
2537 	/* Suspend PMU event interrupts */
2538 	pmu_suspend();
2539 	pmu_sys_suspended = 1;
2540 
2541 #ifdef CONFIG_PMAC_BACKLIGHT
2542 	/* Tell backlight code not to muck around with the chip anymore */
2543 	pmu_backlight_set_sleep(1);
2544 #endif
2545 
2546 	return 0;
2547 }
2548 
2549 static void pmu_syscore_resume(void)
2550 {
2551 	struct adb_request req;
2552 
2553 	if (!pmu_sys_suspended)
2554 		return;
2555 
2556 	/* Tell PMU we are ready */
2557 	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2558 	pmu_wait_complete(&req);
2559 
2560 #ifdef CONFIG_PMAC_BACKLIGHT
2561 	/* Tell backlight code it can use the chip again */
2562 	pmu_backlight_set_sleep(0);
2563 #endif
2564 	/* Resume PMU event interrupts */
2565 	pmu_resume();
2566 	pmu_sys_suspended = 0;
2567 }
2568 
2569 static struct syscore_ops pmu_syscore_ops = {
2570 	.suspend = pmu_syscore_suspend,
2571 	.resume = pmu_syscore_resume,
2572 };
2573 
2574 static int pmu_syscore_register(void)
2575 {
2576 	register_syscore_ops(&pmu_syscore_ops);
2577 
2578 	return 0;
2579 }
2580 subsys_initcall(pmu_syscore_register);
2581 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2582 
2583 EXPORT_SYMBOL(pmu_request);
2584 EXPORT_SYMBOL(pmu_queue_request);
2585 EXPORT_SYMBOL(pmu_poll);
2586 EXPORT_SYMBOL(pmu_poll_adb);
2587 EXPORT_SYMBOL(pmu_wait_complete);
2588 EXPORT_SYMBOL(pmu_suspend);
2589 EXPORT_SYMBOL(pmu_resume);
2590 EXPORT_SYMBOL(pmu_unlock);
2591 #if defined(CONFIG_PPC32)
2592 EXPORT_SYMBOL(pmu_enable_irled);
2593 EXPORT_SYMBOL(pmu_battery_count);
2594 EXPORT_SYMBOL(pmu_batteries);
2595 EXPORT_SYMBOL(pmu_power_flags);
2596 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2597 
2598