1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Device driver for the PMU in Apple PowerBooks and PowerMacs.
4  *
5  * The VIA (versatile interface adapter) interfaces to the PMU,
6  * a 6805 microprocessor core whose primary function is to control
7  * battery charging and system power on the PowerBook 3400 and 2400.
8  * The PMU also controls the ADB (Apple Desktop Bus) which connects
9  * to the keyboard and mouse, as well as the non-volatile RAM
10  * and the RTC (real time clock) chip.
11  *
12  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
13  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
14  * Copyright (C) 2006-2007 Johannes Berg
15  *
16  * THIS DRIVER IS BECOMING A TOTAL MESS !
17  *  - Cleanup atomically disabling reply to PMU events after
18  *    a sleep or a freq. switch
19  *
20  */
21 #include <stdarg.h>
22 #include <linux/mutex.h>
23 #include <linux/types.h>
24 #include <linux/errno.h>
25 #include <linux/kernel.h>
26 #include <linux/delay.h>
27 #include <linux/sched/signal.h>
28 #include <linux/miscdevice.h>
29 #include <linux/blkdev.h>
30 #include <linux/pci.h>
31 #include <linux/slab.h>
32 #include <linux/poll.h>
33 #include <linux/adb.h>
34 #include <linux/pmu.h>
35 #include <linux/cuda.h>
36 #include <linux/module.h>
37 #include <linux/spinlock.h>
38 #include <linux/pm.h>
39 #include <linux/proc_fs.h>
40 #include <linux/seq_file.h>
41 #include <linux/init.h>
42 #include <linux/interrupt.h>
43 #include <linux/device.h>
44 #include <linux/syscore_ops.h>
45 #include <linux/freezer.h>
46 #include <linux/syscalls.h>
47 #include <linux/suspend.h>
48 #include <linux/cpu.h>
49 #include <linux/compat.h>
50 #include <linux/of_address.h>
51 #include <linux/of_irq.h>
52 #include <linux/uaccess.h>
53 #include <linux/pgtable.h>
54 #include <asm/machdep.h>
55 #include <asm/io.h>
56 #include <asm/sections.h>
57 #include <asm/irq.h>
58 #ifdef CONFIG_PPC_PMAC
59 #include <asm/pmac_feature.h>
60 #include <asm/pmac_pfunc.h>
61 #include <asm/pmac_low_i2c.h>
62 #include <asm/prom.h>
63 #include <asm/mmu_context.h>
64 #include <asm/cputable.h>
65 #include <asm/time.h>
66 #include <asm/backlight.h>
67 #else
68 #include <asm/macintosh.h>
69 #include <asm/macints.h>
70 #include <asm/mac_via.h>
71 #endif
72 
73 #include "via-pmu-event.h"
74 
75 /* Some compile options */
76 #undef DEBUG_SLEEP
77 
78 /* How many iterations between battery polls */
79 #define BATTERY_POLLING_COUNT	2
80 
81 static DEFINE_MUTEX(pmu_info_proc_mutex);
82 
83 /* VIA registers - spaced 0x200 bytes apart */
84 #define RS		0x200		/* skip between registers */
85 #define B		0		/* B-side data */
86 #define A		RS		/* A-side data */
87 #define DIRB		(2*RS)		/* B-side direction (1=output) */
88 #define DIRA		(3*RS)		/* A-side direction (1=output) */
89 #define T1CL		(4*RS)		/* Timer 1 ctr/latch (low 8 bits) */
90 #define T1CH		(5*RS)		/* Timer 1 counter (high 8 bits) */
91 #define T1LL		(6*RS)		/* Timer 1 latch (low 8 bits) */
92 #define T1LH		(7*RS)		/* Timer 1 latch (high 8 bits) */
93 #define T2CL		(8*RS)		/* Timer 2 ctr/latch (low 8 bits) */
94 #define T2CH		(9*RS)		/* Timer 2 counter (high 8 bits) */
95 #define SR		(10*RS)		/* Shift register */
96 #define ACR		(11*RS)		/* Auxiliary control register */
97 #define PCR		(12*RS)		/* Peripheral control register */
98 #define IFR		(13*RS)		/* Interrupt flag register */
99 #define IER		(14*RS)		/* Interrupt enable register */
100 #define ANH		(15*RS)		/* A-side data, no handshake */
101 
102 /* Bits in B data register: both active low */
103 #ifdef CONFIG_PPC_PMAC
104 #define TACK		0x08		/* Transfer acknowledge (input) */
105 #define TREQ		0x10		/* Transfer request (output) */
106 #else
107 #define TACK		0x02
108 #define TREQ		0x04
109 #endif
110 
111 /* Bits in ACR */
112 #define SR_CTRL		0x1c		/* Shift register control bits */
113 #define SR_EXT		0x0c		/* Shift on external clock */
114 #define SR_OUT		0x10		/* Shift out if 1 */
115 
116 /* Bits in IFR and IER */
117 #define IER_SET		0x80		/* set bits in IER */
118 #define IER_CLR		0		/* clear bits in IER */
119 #define SR_INT		0x04		/* Shift register full/empty */
120 #define CB2_INT		0x08
121 #define CB1_INT		0x10		/* transition on CB1 input */
122 
123 static volatile enum pmu_state {
124 	uninitialized = 0,
125 	idle,
126 	sending,
127 	intack,
128 	reading,
129 	reading_intr,
130 	locked,
131 } pmu_state;
132 
133 static volatile enum int_data_state {
134 	int_data_empty,
135 	int_data_fill,
136 	int_data_ready,
137 	int_data_flush
138 } int_data_state[2] = { int_data_empty, int_data_empty };
139 
140 static struct adb_request *current_req;
141 static struct adb_request *last_req;
142 static struct adb_request *req_awaiting_reply;
143 static unsigned char interrupt_data[2][32];
144 static int interrupt_data_len[2];
145 static int int_data_last;
146 static unsigned char *reply_ptr;
147 static int data_index;
148 static int data_len;
149 static volatile int adb_int_pending;
150 static volatile int disable_poll;
151 static int pmu_kind = PMU_UNKNOWN;
152 static int pmu_fully_inited;
153 static int pmu_has_adb;
154 #ifdef CONFIG_PPC_PMAC
155 static volatile unsigned char __iomem *via1;
156 static volatile unsigned char __iomem *via2;
157 static struct device_node *vias;
158 static struct device_node *gpio_node;
159 #endif
160 static unsigned char __iomem *gpio_reg;
161 static int gpio_irq = 0;
162 static int gpio_irq_enabled = -1;
163 static volatile int pmu_suspended;
164 static spinlock_t pmu_lock;
165 static u8 pmu_intr_mask;
166 static int pmu_version;
167 static int drop_interrupts;
168 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
169 static int option_lid_wakeup = 1;
170 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
171 static unsigned long async_req_locks;
172 
173 #define NUM_IRQ_STATS 13
174 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
175 
176 static struct proc_dir_entry *proc_pmu_root;
177 static struct proc_dir_entry *proc_pmu_info;
178 static struct proc_dir_entry *proc_pmu_irqstats;
179 static struct proc_dir_entry *proc_pmu_options;
180 static int option_server_mode;
181 
182 int pmu_battery_count;
183 static int pmu_cur_battery;
184 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
185 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
186 static int query_batt_timer = BATTERY_POLLING_COUNT;
187 static struct adb_request batt_req;
188 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
189 
190 int asleep;
191 
192 #ifdef CONFIG_ADB
193 static int adb_dev_map;
194 static int pmu_adb_flags;
195 
196 static int pmu_probe(void);
197 static int pmu_init(void);
198 static int pmu_send_request(struct adb_request *req, int sync);
199 static int pmu_adb_autopoll(int devs);
200 static int pmu_adb_reset_bus(void);
201 #endif /* CONFIG_ADB */
202 
203 static int init_pmu(void);
204 static void pmu_start(void);
205 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
206 static irqreturn_t gpio1_interrupt(int irq, void *arg);
207 static int pmu_info_proc_show(struct seq_file *m, void *v);
208 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
209 static int pmu_battery_proc_show(struct seq_file *m, void *v);
210 static void pmu_pass_intr(unsigned char *data, int len);
211 static const struct proc_ops pmu_options_proc_ops;
212 
213 #ifdef CONFIG_ADB
214 const struct adb_driver via_pmu_driver = {
215 	.name         = "PMU",
216 	.probe        = pmu_probe,
217 	.init         = pmu_init,
218 	.send_request = pmu_send_request,
219 	.autopoll     = pmu_adb_autopoll,
220 	.poll         = pmu_poll_adb,
221 	.reset_bus    = pmu_adb_reset_bus,
222 };
223 #endif /* CONFIG_ADB */
224 
225 extern void low_sleep_handler(void);
226 extern void enable_kernel_altivec(void);
227 extern void enable_kernel_fp(void);
228 
229 #ifdef DEBUG_SLEEP
230 int pmu_polled_request(struct adb_request *req);
231 void pmu_blink(int n);
232 #endif
233 
234 /*
235  * This table indicates for each PMU opcode:
236  * - the number of data bytes to be sent with the command, or -1
237  *   if a length byte should be sent,
238  * - the number of response bytes which the PMU will return, or
239  *   -1 if it will send a length byte.
240  */
241 static const s8 pmu_data_len[256][2] = {
242 /*	   0	   1	   2	   3	   4	   5	   6	   7  */
243 /*00*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
244 /*08*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
245 /*10*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
246 /*18*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
247 /*20*/	{-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
248 /*28*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
249 /*30*/	{ 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250 /*38*/	{ 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
251 /*40*/	{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*48*/	{ 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
253 /*50*/	{ 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
254 /*58*/	{ 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
255 /*60*/	{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*68*/	{ 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
257 /*70*/	{ 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
258 /*78*/	{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
259 /*80*/	{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260 /*88*/	{ 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
261 /*90*/	{ 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262 /*98*/	{ 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
263 /*a0*/	{ 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
264 /*a8*/	{ 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
265 /*b0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266 /*b8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
267 /*c0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
268 /*c8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
269 /*d0*/	{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
270 /*d8*/	{ 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
271 /*e0*/	{-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
272 /*e8*/	{ 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
273 /*f0*/	{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
274 /*f8*/	{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
275 };
276 
277 static char *pbook_type[] = {
278 	"Unknown PowerBook",
279 	"PowerBook 2400/3400/3500(G3)",
280 	"PowerBook G3 Series",
281 	"1999 PowerBook G3",
282 	"Core99"
283 };
284 
find_via_pmu(void)285 int __init find_via_pmu(void)
286 {
287 #ifdef CONFIG_PPC_PMAC
288 	u64 taddr;
289 	const u32 *reg;
290 
291 	if (pmu_state != uninitialized)
292 		return 1;
293 	vias = of_find_node_by_name(NULL, "via-pmu");
294 	if (vias == NULL)
295 		return 0;
296 
297 	reg = of_get_property(vias, "reg", NULL);
298 	if (reg == NULL) {
299 		printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
300 		goto fail;
301 	}
302 	taddr = of_translate_address(vias, reg);
303 	if (taddr == OF_BAD_ADDR) {
304 		printk(KERN_ERR "via-pmu: Can't translate address !\n");
305 		goto fail;
306 	}
307 
308 	spin_lock_init(&pmu_lock);
309 
310 	pmu_has_adb = 1;
311 
312 	pmu_intr_mask =	PMU_INT_PCEJECT |
313 			PMU_INT_SNDBRT |
314 			PMU_INT_ADB |
315 			PMU_INT_TICK;
316 
317 	if (of_node_name_eq(vias->parent, "ohare") ||
318 	    of_device_is_compatible(vias->parent, "ohare"))
319 		pmu_kind = PMU_OHARE_BASED;
320 	else if (of_device_is_compatible(vias->parent, "paddington"))
321 		pmu_kind = PMU_PADDINGTON_BASED;
322 	else if (of_device_is_compatible(vias->parent, "heathrow"))
323 		pmu_kind = PMU_HEATHROW_BASED;
324 	else if (of_device_is_compatible(vias->parent, "Keylargo")
325 		 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
326 		struct device_node *gpiop;
327 		struct device_node *adbp;
328 		u64 gaddr = OF_BAD_ADDR;
329 
330 		pmu_kind = PMU_KEYLARGO_BASED;
331 		adbp = of_find_node_by_type(NULL, "adb");
332 		pmu_has_adb = (adbp != NULL);
333 		of_node_put(adbp);
334 		pmu_intr_mask =	PMU_INT_PCEJECT |
335 				PMU_INT_SNDBRT |
336 				PMU_INT_ADB |
337 				PMU_INT_TICK |
338 				PMU_INT_ENVIRONMENT;
339 
340 		gpiop = of_find_node_by_name(NULL, "gpio");
341 		if (gpiop) {
342 			reg = of_get_property(gpiop, "reg", NULL);
343 			if (reg)
344 				gaddr = of_translate_address(gpiop, reg);
345 			if (gaddr != OF_BAD_ADDR)
346 				gpio_reg = ioremap(gaddr, 0x10);
347 			of_node_put(gpiop);
348 		}
349 		if (gpio_reg == NULL) {
350 			printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
351 			goto fail;
352 		}
353 	} else
354 		pmu_kind = PMU_UNKNOWN;
355 
356 	via1 = via2 = ioremap(taddr, 0x2000);
357 	if (via1 == NULL) {
358 		printk(KERN_ERR "via-pmu: Can't map address !\n");
359 		goto fail_via_remap;
360 	}
361 
362 	out_8(&via1[IER], IER_CLR | 0x7f);	/* disable all intrs */
363 	out_8(&via1[IFR], 0x7f);			/* clear IFR */
364 
365 	pmu_state = idle;
366 
367 	if (!init_pmu())
368 		goto fail_init;
369 
370 	sys_ctrler = SYS_CTRLER_PMU;
371 
372 	return 1;
373 
374  fail_init:
375 	iounmap(via1);
376 	via1 = via2 = NULL;
377  fail_via_remap:
378 	iounmap(gpio_reg);
379 	gpio_reg = NULL;
380  fail:
381 	of_node_put(vias);
382 	vias = NULL;
383 	pmu_state = uninitialized;
384 	return 0;
385 #else
386 	if (macintosh_config->adb_type != MAC_ADB_PB2)
387 		return 0;
388 
389 	pmu_kind = PMU_UNKNOWN;
390 
391 	spin_lock_init(&pmu_lock);
392 
393 	pmu_has_adb = 1;
394 
395 	pmu_intr_mask =	PMU_INT_PCEJECT |
396 			PMU_INT_SNDBRT |
397 			PMU_INT_ADB |
398 			PMU_INT_TICK;
399 
400 	pmu_state = idle;
401 
402 	if (!init_pmu()) {
403 		pmu_state = uninitialized;
404 		return 0;
405 	}
406 
407 	return 1;
408 #endif /* !CONFIG_PPC_PMAC */
409 }
410 
411 #ifdef CONFIG_ADB
pmu_probe(void)412 static int pmu_probe(void)
413 {
414 	return pmu_state == uninitialized ? -ENODEV : 0;
415 }
416 
pmu_init(void)417 static int pmu_init(void)
418 {
419 	return pmu_state == uninitialized ? -ENODEV : 0;
420 }
421 #endif /* CONFIG_ADB */
422 
423 /*
424  * We can't wait until pmu_init gets called, that happens too late.
425  * It happens after IDE and SCSI initialization, which can take a few
426  * seconds, and by that time the PMU could have given up on us and
427  * turned us off.
428  * Thus this is called with arch_initcall rather than device_initcall.
429  */
via_pmu_start(void)430 static int __init via_pmu_start(void)
431 {
432 	unsigned int __maybe_unused irq;
433 
434 	if (pmu_state == uninitialized)
435 		return -ENODEV;
436 
437 	batt_req.complete = 1;
438 
439 #ifdef CONFIG_PPC_PMAC
440 	irq = irq_of_parse_and_map(vias, 0);
441 	if (!irq) {
442 		printk(KERN_ERR "via-pmu: can't map interrupt\n");
443 		return -ENODEV;
444 	}
445 	/* We set IRQF_NO_SUSPEND because we don't want the interrupt
446 	 * to be disabled between the 2 passes of driver suspend, we
447 	 * control our own disabling for that one
448 	 */
449 	if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
450 			"VIA-PMU", (void *)0)) {
451 		printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
452 		return -ENODEV;
453 	}
454 
455 	if (pmu_kind == PMU_KEYLARGO_BASED) {
456 		gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
457 		if (gpio_node == NULL)
458 			gpio_node = of_find_node_by_name(NULL,
459 							 "pmu-interrupt");
460 		if (gpio_node)
461 			gpio_irq = irq_of_parse_and_map(gpio_node, 0);
462 
463 		if (gpio_irq) {
464 			if (request_irq(gpio_irq, gpio1_interrupt,
465 					IRQF_NO_SUSPEND, "GPIO1 ADB",
466 					(void *)0))
467 				printk(KERN_ERR "pmu: can't get irq %d"
468 				       " (GPIO1)\n", gpio_irq);
469 			else
470 				gpio_irq_enabled = 1;
471 		}
472 	}
473 
474 	/* Enable interrupts */
475 	out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
476 #else
477 	if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
478 			"VIA-PMU-SR", NULL)) {
479 		pr_err("%s: couldn't get SR irq\n", __func__);
480 		return -ENODEV;
481 	}
482 	if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
483 			"VIA-PMU-CL", NULL)) {
484 		pr_err("%s: couldn't get CL irq\n", __func__);
485 		free_irq(IRQ_MAC_ADB_SR, NULL);
486 		return -ENODEV;
487 	}
488 #endif /* !CONFIG_PPC_PMAC */
489 
490 	pmu_fully_inited = 1;
491 
492 	/* Make sure PMU settle down before continuing. This is _very_ important
493 	 * since the IDE probe may shut interrupts down for quite a bit of time. If
494 	 * a PMU communication is pending while this happens, the PMU may timeout
495 	 * Not that on Core99 machines, the PMU keeps sending us environement
496 	 * messages, we should find a way to either fix IDE or make it call
497 	 * pmu_suspend() before masking interrupts. This can also happens while
498 	 * scolling with some fbdevs.
499 	 */
500 	do {
501 		pmu_poll();
502 	} while (pmu_state != idle);
503 
504 	return 0;
505 }
506 
507 arch_initcall(via_pmu_start);
508 
509 /*
510  * This has to be done after pci_init, which is a subsys_initcall.
511  */
via_pmu_dev_init(void)512 static int __init via_pmu_dev_init(void)
513 {
514 	if (pmu_state == uninitialized)
515 		return -ENODEV;
516 
517 #ifdef CONFIG_PMAC_BACKLIGHT
518 	/* Initialize backlight */
519 	pmu_backlight_init();
520 #endif
521 
522 #ifdef CONFIG_PPC32
523   	if (of_machine_is_compatible("AAPL,3400/2400") ||
524   		of_machine_is_compatible("AAPL,3500")) {
525 		int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
526 			NULL, PMAC_MB_INFO_MODEL, 0);
527 		pmu_battery_count = 1;
528 		if (mb == PMAC_TYPE_COMET)
529 			pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
530 		else
531 			pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
532 	} else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
533 		of_machine_is_compatible("PowerBook1,1")) {
534 		pmu_battery_count = 2;
535 		pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
536 		pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
537 	} else {
538 		struct device_node* prim =
539 			of_find_node_by_name(NULL, "power-mgt");
540 		const u32 *prim_info = NULL;
541 		if (prim)
542 			prim_info = of_get_property(prim, "prim-info", NULL);
543 		if (prim_info) {
544 			/* Other stuffs here yet unknown */
545 			pmu_battery_count = (prim_info[6] >> 16) & 0xff;
546 			pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
547 			if (pmu_battery_count > 1)
548 				pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
549 		}
550 		of_node_put(prim);
551 	}
552 #endif /* CONFIG_PPC32 */
553 
554 	/* Create /proc/pmu */
555 	proc_pmu_root = proc_mkdir("pmu", NULL);
556 	if (proc_pmu_root) {
557 		long i;
558 
559 		for (i=0; i<pmu_battery_count; i++) {
560 			char title[16];
561 			sprintf(title, "battery_%ld", i);
562 			proc_pmu_batt[i] = proc_create_single_data(title, 0,
563 					proc_pmu_root, pmu_battery_proc_show,
564 					(void *)i);
565 		}
566 
567 		proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
568 				pmu_info_proc_show);
569 		proc_pmu_irqstats = proc_create_single("interrupts", 0,
570 				proc_pmu_root, pmu_irqstats_proc_show);
571 		proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
572 						&pmu_options_proc_ops);
573 	}
574 	return 0;
575 }
576 
577 device_initcall(via_pmu_dev_init);
578 
579 static int
init_pmu(void)580 init_pmu(void)
581 {
582 	int timeout;
583 	struct adb_request req;
584 
585 	/* Negate TREQ. Set TACK to input and TREQ to output. */
586 	out_8(&via2[B], in_8(&via2[B]) | TREQ);
587 	out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
588 
589 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
590 	timeout =  100000;
591 	while (!req.complete) {
592 		if (--timeout < 0) {
593 			printk(KERN_ERR "init_pmu: no response from PMU\n");
594 			return 0;
595 		}
596 		udelay(10);
597 		pmu_poll();
598 	}
599 
600 	/* ack all pending interrupts */
601 	timeout = 100000;
602 	interrupt_data[0][0] = 1;
603 	while (interrupt_data[0][0] || pmu_state != idle) {
604 		if (--timeout < 0) {
605 			printk(KERN_ERR "init_pmu: timed out acking intrs\n");
606 			return 0;
607 		}
608 		if (pmu_state == idle)
609 			adb_int_pending = 1;
610 		via_pmu_interrupt(0, NULL);
611 		udelay(10);
612 	}
613 
614 	/* Tell PMU we are ready.  */
615 	if (pmu_kind == PMU_KEYLARGO_BASED) {
616 		pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
617 		while (!req.complete)
618 			pmu_poll();
619 	}
620 
621 	/* Read PMU version */
622 	pmu_request(&req, NULL, 1, PMU_GET_VERSION);
623 	pmu_wait_complete(&req);
624 	if (req.reply_len > 0)
625 		pmu_version = req.reply[0];
626 
627 	/* Read server mode setting */
628 	if (pmu_kind == PMU_KEYLARGO_BASED) {
629 		pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
630 			    PMU_PWR_GET_POWERUP_EVENTS);
631 		pmu_wait_complete(&req);
632 		if (req.reply_len == 2) {
633 			if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
634 				option_server_mode = 1;
635 			printk(KERN_INFO "via-pmu: Server Mode is %s\n",
636 			       option_server_mode ? "enabled" : "disabled");
637 		}
638 	}
639 
640 	printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
641 	       PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
642 
643 	return 1;
644 }
645 
646 int
pmu_get_model(void)647 pmu_get_model(void)
648 {
649 	return pmu_kind;
650 }
651 
pmu_set_server_mode(int server_mode)652 static void pmu_set_server_mode(int server_mode)
653 {
654 	struct adb_request req;
655 
656 	if (pmu_kind != PMU_KEYLARGO_BASED)
657 		return;
658 
659 	option_server_mode = server_mode;
660 	pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
661 	pmu_wait_complete(&req);
662 	if (req.reply_len < 2)
663 		return;
664 	if (server_mode)
665 		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
666 			    PMU_PWR_SET_POWERUP_EVENTS,
667 			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
668 	else
669 		pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
670 			    PMU_PWR_CLR_POWERUP_EVENTS,
671 			    req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
672 	pmu_wait_complete(&req);
673 }
674 
675 /* This new version of the code for 2400/3400/3500 powerbooks
676  * is inspired from the implementation in gkrellm-pmu
677  */
678 static void
done_battery_state_ohare(struct adb_request * req)679 done_battery_state_ohare(struct adb_request* req)
680 {
681 #ifdef CONFIG_PPC_PMAC
682 	/* format:
683 	 *  [0]    :  flags
684 	 *    0x01 :  AC indicator
685 	 *    0x02 :  charging
686 	 *    0x04 :  battery exist
687 	 *    0x08 :
688 	 *    0x10 :
689 	 *    0x20 :  full charged
690 	 *    0x40 :  pcharge reset
691 	 *    0x80 :  battery exist
692 	 *
693 	 *  [1][2] :  battery voltage
694 	 *  [3]    :  CPU temperature
695 	 *  [4]    :  battery temperature
696 	 *  [5]    :  current
697 	 *  [6][7] :  pcharge
698 	 *              --tkoba
699 	 */
700 	unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
701 	long pcharge, charge, vb, vmax, lmax;
702 	long vmax_charging, vmax_charged;
703 	long amperage, voltage, time, max;
704 	int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
705 			NULL, PMAC_MB_INFO_MODEL, 0);
706 
707 	if (req->reply[0] & 0x01)
708 		pmu_power_flags |= PMU_PWR_AC_PRESENT;
709 	else
710 		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
711 
712 	if (mb == PMAC_TYPE_COMET) {
713 		vmax_charged = 189;
714 		vmax_charging = 213;
715 		lmax = 6500;
716 	} else {
717 		vmax_charged = 330;
718 		vmax_charging = 330;
719 		lmax = 6500;
720 	}
721 	vmax = vmax_charged;
722 
723 	/* If battery installed */
724 	if (req->reply[0] & 0x04) {
725 		bat_flags |= PMU_BATT_PRESENT;
726 		if (req->reply[0] & 0x02)
727 			bat_flags |= PMU_BATT_CHARGING;
728 		vb = (req->reply[1] << 8) | req->reply[2];
729 		voltage = (vb * 265 + 72665) / 10;
730 		amperage = req->reply[5];
731 		if ((req->reply[0] & 0x01) == 0) {
732 			if (amperage > 200)
733 				vb += ((amperage - 200) * 15)/100;
734 		} else if (req->reply[0] & 0x02) {
735 			vb = (vb * 97) / 100;
736 			vmax = vmax_charging;
737 		}
738 		charge = (100 * vb) / vmax;
739 		if (req->reply[0] & 0x40) {
740 			pcharge = (req->reply[6] << 8) + req->reply[7];
741 			if (pcharge > lmax)
742 				pcharge = lmax;
743 			pcharge *= 100;
744 			pcharge = 100 - pcharge / lmax;
745 			if (pcharge < charge)
746 				charge = pcharge;
747 		}
748 		if (amperage > 0)
749 			time = (charge * 16440) / amperage;
750 		else
751 			time = 0;
752 		max = 100;
753 		amperage = -amperage;
754 	} else
755 		charge = max = amperage = voltage = time = 0;
756 
757 	pmu_batteries[pmu_cur_battery].flags = bat_flags;
758 	pmu_batteries[pmu_cur_battery].charge = charge;
759 	pmu_batteries[pmu_cur_battery].max_charge = max;
760 	pmu_batteries[pmu_cur_battery].amperage = amperage;
761 	pmu_batteries[pmu_cur_battery].voltage = voltage;
762 	pmu_batteries[pmu_cur_battery].time_remaining = time;
763 #endif /* CONFIG_PPC_PMAC */
764 
765 	clear_bit(0, &async_req_locks);
766 }
767 
768 static void
done_battery_state_smart(struct adb_request * req)769 done_battery_state_smart(struct adb_request* req)
770 {
771 	/* format:
772 	 *  [0] : format of this structure (known: 3,4,5)
773 	 *  [1] : flags
774 	 *
775 	 *  format 3 & 4:
776 	 *
777 	 *  [2] : charge
778 	 *  [3] : max charge
779 	 *  [4] : current
780 	 *  [5] : voltage
781 	 *
782 	 *  format 5:
783 	 *
784 	 *  [2][3] : charge
785 	 *  [4][5] : max charge
786 	 *  [6][7] : current
787 	 *  [8][9] : voltage
788 	 */
789 
790 	unsigned int bat_flags = PMU_BATT_TYPE_SMART;
791 	int amperage;
792 	unsigned int capa, max, voltage;
793 
794 	if (req->reply[1] & 0x01)
795 		pmu_power_flags |= PMU_PWR_AC_PRESENT;
796 	else
797 		pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
798 
799 
800 	capa = max = amperage = voltage = 0;
801 
802 	if (req->reply[1] & 0x04) {
803 		bat_flags |= PMU_BATT_PRESENT;
804 		switch(req->reply[0]) {
805 			case 3:
806 			case 4: capa = req->reply[2];
807 				max = req->reply[3];
808 				amperage = *((signed char *)&req->reply[4]);
809 				voltage = req->reply[5];
810 				break;
811 			case 5: capa = (req->reply[2] << 8) | req->reply[3];
812 				max = (req->reply[4] << 8) | req->reply[5];
813 				amperage = *((signed short *)&req->reply[6]);
814 				voltage = (req->reply[8] << 8) | req->reply[9];
815 				break;
816 			default:
817 				pr_warn("pmu.c: unrecognized battery info, "
818 					"len: %d, %4ph\n", req->reply_len,
819 							   req->reply);
820 				break;
821 		}
822 	}
823 
824 	if ((req->reply[1] & 0x01) && (amperage > 0))
825 		bat_flags |= PMU_BATT_CHARGING;
826 
827 	pmu_batteries[pmu_cur_battery].flags = bat_flags;
828 	pmu_batteries[pmu_cur_battery].charge = capa;
829 	pmu_batteries[pmu_cur_battery].max_charge = max;
830 	pmu_batteries[pmu_cur_battery].amperage = amperage;
831 	pmu_batteries[pmu_cur_battery].voltage = voltage;
832 	if (amperage) {
833 		if ((req->reply[1] & 0x01) && (amperage > 0))
834 			pmu_batteries[pmu_cur_battery].time_remaining
835 				= ((max-capa) * 3600) / amperage;
836 		else
837 			pmu_batteries[pmu_cur_battery].time_remaining
838 				= (capa * 3600) / (-amperage);
839 	} else
840 		pmu_batteries[pmu_cur_battery].time_remaining = 0;
841 
842 	pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
843 
844 	clear_bit(0, &async_req_locks);
845 }
846 
847 static void
query_battery_state(void)848 query_battery_state(void)
849 {
850 	if (test_and_set_bit(0, &async_req_locks))
851 		return;
852 	if (pmu_kind == PMU_OHARE_BASED)
853 		pmu_request(&batt_req, done_battery_state_ohare,
854 			1, PMU_BATTERY_STATE);
855 	else
856 		pmu_request(&batt_req, done_battery_state_smart,
857 			2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
858 }
859 
pmu_info_proc_show(struct seq_file * m,void * v)860 static int pmu_info_proc_show(struct seq_file *m, void *v)
861 {
862 	seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
863 	seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
864 	seq_printf(m, "AC Power               : %d\n",
865 		((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
866 	seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
867 
868 	return 0;
869 }
870 
pmu_irqstats_proc_show(struct seq_file * m,void * v)871 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
872 {
873 	int i;
874 	static const char *irq_names[NUM_IRQ_STATS] = {
875 		"Unknown interrupt (type 0)",
876 		"Unknown interrupt (type 1)",
877 		"PC-Card eject button",
878 		"Sound/Brightness button",
879 		"ADB message",
880 		"Battery state change",
881 		"Environment interrupt",
882 		"Tick timer",
883 		"Ghost interrupt (zero len)",
884 		"Empty interrupt (empty mask)",
885 		"Max irqs in a row",
886 		"Total CB1 triggered events",
887 		"Total GPIO1 triggered events",
888         };
889 
890 	for (i = 0; i < NUM_IRQ_STATS; i++) {
891 		seq_printf(m, " %2u: %10u (%s)\n",
892 			     i, pmu_irq_stats[i], irq_names[i]);
893 	}
894 	return 0;
895 }
896 
pmu_battery_proc_show(struct seq_file * m,void * v)897 static int pmu_battery_proc_show(struct seq_file *m, void *v)
898 {
899 	long batnum = (long)m->private;
900 
901 	seq_putc(m, '\n');
902 	seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
903 	seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
904 	seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
905 	seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
906 	seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
907 	seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
908 	return 0;
909 }
910 
pmu_options_proc_show(struct seq_file * m,void * v)911 static int pmu_options_proc_show(struct seq_file *m, void *v)
912 {
913 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
914 	if (pmu_kind == PMU_KEYLARGO_BASED &&
915 	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
916 		seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
917 #endif
918 	if (pmu_kind == PMU_KEYLARGO_BASED)
919 		seq_printf(m, "server_mode=%d\n", option_server_mode);
920 
921 	return 0;
922 }
923 
pmu_options_proc_open(struct inode * inode,struct file * file)924 static int pmu_options_proc_open(struct inode *inode, struct file *file)
925 {
926 	return single_open(file, pmu_options_proc_show, NULL);
927 }
928 
pmu_options_proc_write(struct file * file,const char __user * buffer,size_t count,loff_t * pos)929 static ssize_t pmu_options_proc_write(struct file *file,
930 		const char __user *buffer, size_t count, loff_t *pos)
931 {
932 	char tmp[33];
933 	char *label, *val;
934 	size_t fcount = count;
935 
936 	if (!count)
937 		return -EINVAL;
938 	if (count > 32)
939 		count = 32;
940 	if (copy_from_user(tmp, buffer, count))
941 		return -EFAULT;
942 	tmp[count] = 0;
943 
944 	label = tmp;
945 	while(*label == ' ')
946 		label++;
947 	val = label;
948 	while(*val && (*val != '=')) {
949 		if (*val == ' ')
950 			*val = 0;
951 		val++;
952 	}
953 	if ((*val) == 0)
954 		return -EINVAL;
955 	*(val++) = 0;
956 	while(*val == ' ')
957 		val++;
958 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
959 	if (pmu_kind == PMU_KEYLARGO_BASED &&
960 	    pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
961 		if (!strcmp(label, "lid_wakeup"))
962 			option_lid_wakeup = ((*val) == '1');
963 #endif
964 	if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
965 		int new_value;
966 		new_value = ((*val) == '1');
967 		if (new_value != option_server_mode)
968 			pmu_set_server_mode(new_value);
969 	}
970 	return fcount;
971 }
972 
973 static const struct proc_ops pmu_options_proc_ops = {
974 	.proc_open	= pmu_options_proc_open,
975 	.proc_read	= seq_read,
976 	.proc_lseek	= seq_lseek,
977 	.proc_release	= single_release,
978 	.proc_write	= pmu_options_proc_write,
979 };
980 
981 #ifdef CONFIG_ADB
982 /* Send an ADB command */
pmu_send_request(struct adb_request * req,int sync)983 static int pmu_send_request(struct adb_request *req, int sync)
984 {
985 	int i, ret;
986 
987 	if (pmu_state == uninitialized || !pmu_fully_inited) {
988 		req->complete = 1;
989 		return -ENXIO;
990 	}
991 
992 	ret = -EINVAL;
993 
994 	switch (req->data[0]) {
995 	case PMU_PACKET:
996 		for (i = 0; i < req->nbytes - 1; ++i)
997 			req->data[i] = req->data[i+1];
998 		--req->nbytes;
999 		if (pmu_data_len[req->data[0]][1] != 0) {
1000 			req->reply[0] = ADB_RET_OK;
1001 			req->reply_len = 1;
1002 		} else
1003 			req->reply_len = 0;
1004 		ret = pmu_queue_request(req);
1005 		break;
1006 	case CUDA_PACKET:
1007 		switch (req->data[1]) {
1008 		case CUDA_GET_TIME:
1009 			if (req->nbytes != 2)
1010 				break;
1011 			req->data[0] = PMU_READ_RTC;
1012 			req->nbytes = 1;
1013 			req->reply_len = 3;
1014 			req->reply[0] = CUDA_PACKET;
1015 			req->reply[1] = 0;
1016 			req->reply[2] = CUDA_GET_TIME;
1017 			ret = pmu_queue_request(req);
1018 			break;
1019 		case CUDA_SET_TIME:
1020 			if (req->nbytes != 6)
1021 				break;
1022 			req->data[0] = PMU_SET_RTC;
1023 			req->nbytes = 5;
1024 			for (i = 1; i <= 4; ++i)
1025 				req->data[i] = req->data[i+1];
1026 			req->reply_len = 3;
1027 			req->reply[0] = CUDA_PACKET;
1028 			req->reply[1] = 0;
1029 			req->reply[2] = CUDA_SET_TIME;
1030 			ret = pmu_queue_request(req);
1031 			break;
1032 		}
1033 		break;
1034 	case ADB_PACKET:
1035 	    	if (!pmu_has_adb)
1036     			return -ENXIO;
1037 		for (i = req->nbytes - 1; i > 1; --i)
1038 			req->data[i+2] = req->data[i];
1039 		req->data[3] = req->nbytes - 2;
1040 		req->data[2] = pmu_adb_flags;
1041 		/*req->data[1] = req->data[1];*/
1042 		req->data[0] = PMU_ADB_CMD;
1043 		req->nbytes += 2;
1044 		req->reply_expected = 1;
1045 		req->reply_len = 0;
1046 		ret = pmu_queue_request(req);
1047 		break;
1048 	}
1049 	if (ret) {
1050 		req->complete = 1;
1051 		return ret;
1052 	}
1053 
1054 	if (sync)
1055 		while (!req->complete)
1056 			pmu_poll();
1057 
1058 	return 0;
1059 }
1060 
1061 /* Enable/disable autopolling */
__pmu_adb_autopoll(int devs)1062 static int __pmu_adb_autopoll(int devs)
1063 {
1064 	struct adb_request req;
1065 
1066 	if (devs) {
1067 		pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1068 			    adb_dev_map >> 8, adb_dev_map);
1069 		pmu_adb_flags = 2;
1070 	} else {
1071 		pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1072 		pmu_adb_flags = 0;
1073 	}
1074 	while (!req.complete)
1075 		pmu_poll();
1076 	return 0;
1077 }
1078 
pmu_adb_autopoll(int devs)1079 static int pmu_adb_autopoll(int devs)
1080 {
1081 	if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1082 		return -ENXIO;
1083 
1084 	adb_dev_map = devs;
1085 	return __pmu_adb_autopoll(devs);
1086 }
1087 
1088 /* Reset the ADB bus */
pmu_adb_reset_bus(void)1089 static int pmu_adb_reset_bus(void)
1090 {
1091 	struct adb_request req;
1092 	int save_autopoll = adb_dev_map;
1093 
1094 	if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1095 		return -ENXIO;
1096 
1097 	/* anyone got a better idea?? */
1098 	__pmu_adb_autopoll(0);
1099 
1100 	req.nbytes = 4;
1101 	req.done = NULL;
1102 	req.data[0] = PMU_ADB_CMD;
1103 	req.data[1] = ADB_BUSRESET;
1104 	req.data[2] = 0;
1105 	req.data[3] = 0;
1106 	req.data[4] = 0;
1107 	req.reply_len = 0;
1108 	req.reply_expected = 1;
1109 	if (pmu_queue_request(&req) != 0) {
1110 		printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1111 		return -EIO;
1112 	}
1113 	pmu_wait_complete(&req);
1114 
1115 	if (save_autopoll != 0)
1116 		__pmu_adb_autopoll(save_autopoll);
1117 
1118 	return 0;
1119 }
1120 #endif /* CONFIG_ADB */
1121 
1122 /* Construct and send a pmu request */
1123 int
pmu_request(struct adb_request * req,void (* done)(struct adb_request *),int nbytes,...)1124 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1125 	    int nbytes, ...)
1126 {
1127 	va_list list;
1128 	int i;
1129 
1130 	if (pmu_state == uninitialized)
1131 		return -ENXIO;
1132 
1133 	if (nbytes < 0 || nbytes > 32) {
1134 		printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1135 		req->complete = 1;
1136 		return -EINVAL;
1137 	}
1138 	req->nbytes = nbytes;
1139 	req->done = done;
1140 	va_start(list, nbytes);
1141 	for (i = 0; i < nbytes; ++i)
1142 		req->data[i] = va_arg(list, int);
1143 	va_end(list);
1144 	req->reply_len = 0;
1145 	req->reply_expected = 0;
1146 	return pmu_queue_request(req);
1147 }
1148 
1149 int
pmu_queue_request(struct adb_request * req)1150 pmu_queue_request(struct adb_request *req)
1151 {
1152 	unsigned long flags;
1153 	int nsend;
1154 
1155 	if (pmu_state == uninitialized) {
1156 		req->complete = 1;
1157 		return -ENXIO;
1158 	}
1159 	if (req->nbytes <= 0) {
1160 		req->complete = 1;
1161 		return 0;
1162 	}
1163 	nsend = pmu_data_len[req->data[0]][0];
1164 	if (nsend >= 0 && req->nbytes != nsend + 1) {
1165 		req->complete = 1;
1166 		return -EINVAL;
1167 	}
1168 
1169 	req->next = NULL;
1170 	req->sent = 0;
1171 	req->complete = 0;
1172 
1173 	spin_lock_irqsave(&pmu_lock, flags);
1174 	if (current_req) {
1175 		last_req->next = req;
1176 		last_req = req;
1177 	} else {
1178 		current_req = req;
1179 		last_req = req;
1180 		if (pmu_state == idle)
1181 			pmu_start();
1182 	}
1183 	spin_unlock_irqrestore(&pmu_lock, flags);
1184 
1185 	return 0;
1186 }
1187 
1188 static inline void
wait_for_ack(void)1189 wait_for_ack(void)
1190 {
1191 	/* Sightly increased the delay, I had one occurrence of the message
1192 	 * reported
1193 	 */
1194 	int timeout = 4000;
1195 	while ((in_8(&via2[B]) & TACK) == 0) {
1196 		if (--timeout < 0) {
1197 			printk(KERN_ERR "PMU not responding (!ack)\n");
1198 			return;
1199 		}
1200 		udelay(10);
1201 	}
1202 }
1203 
1204 /* New PMU seems to be very sensitive to those timings, so we make sure
1205  * PCI is flushed immediately */
1206 static inline void
send_byte(int x)1207 send_byte(int x)
1208 {
1209 	out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1210 	out_8(&via1[SR], x);
1211 	out_8(&via2[B], in_8(&via2[B]) & ~TREQ);	/* assert TREQ */
1212 	(void)in_8(&via2[B]);
1213 }
1214 
1215 static inline void
recv_byte(void)1216 recv_byte(void)
1217 {
1218 	out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1219 	in_8(&via1[SR]);		/* resets SR */
1220 	out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1221 	(void)in_8(&via2[B]);
1222 }
1223 
1224 static inline void
pmu_done(struct adb_request * req)1225 pmu_done(struct adb_request *req)
1226 {
1227 	void (*done)(struct adb_request *) = req->done;
1228 	mb();
1229 	req->complete = 1;
1230     	/* Here, we assume that if the request has a done member, the
1231     	 * struct request will survive to setting req->complete to 1
1232     	 */
1233 	if (done)
1234 		(*done)(req);
1235 }
1236 
1237 static void
pmu_start(void)1238 pmu_start(void)
1239 {
1240 	struct adb_request *req;
1241 
1242 	/* assert pmu_state == idle */
1243 	/* get the packet to send */
1244 	req = current_req;
1245 	if (!req || pmu_state != idle
1246 	    || (/*req->reply_expected && */req_awaiting_reply))
1247 		return;
1248 
1249 	pmu_state = sending;
1250 	data_index = 1;
1251 	data_len = pmu_data_len[req->data[0]][0];
1252 
1253 	/* Sounds safer to make sure ACK is high before writing. This helped
1254 	 * kill a problem with ADB and some iBooks
1255 	 */
1256 	wait_for_ack();
1257 	/* set the shift register to shift out and send a byte */
1258 	send_byte(req->data[0]);
1259 }
1260 
1261 void
pmu_poll(void)1262 pmu_poll(void)
1263 {
1264 	if (pmu_state == uninitialized)
1265 		return;
1266 	if (disable_poll)
1267 		return;
1268 	via_pmu_interrupt(0, NULL);
1269 }
1270 
1271 void
pmu_poll_adb(void)1272 pmu_poll_adb(void)
1273 {
1274 	if (pmu_state == uninitialized)
1275 		return;
1276 	if (disable_poll)
1277 		return;
1278 	/* Kicks ADB read when PMU is suspended */
1279 	adb_int_pending = 1;
1280 	do {
1281 		via_pmu_interrupt(0, NULL);
1282 	} while (pmu_suspended && (adb_int_pending || pmu_state != idle
1283 		|| req_awaiting_reply));
1284 }
1285 
1286 void
pmu_wait_complete(struct adb_request * req)1287 pmu_wait_complete(struct adb_request *req)
1288 {
1289 	if (pmu_state == uninitialized)
1290 		return;
1291 	while((pmu_state != idle && pmu_state != locked) || !req->complete)
1292 		via_pmu_interrupt(0, NULL);
1293 }
1294 
1295 /* This function loops until the PMU is idle and prevents it from
1296  * anwsering to ADB interrupts. pmu_request can still be called.
1297  * This is done to avoid spurrious shutdowns when we know we'll have
1298  * interrupts switched off for a long time
1299  */
1300 void
pmu_suspend(void)1301 pmu_suspend(void)
1302 {
1303 	unsigned long flags;
1304 
1305 	if (pmu_state == uninitialized)
1306 		return;
1307 
1308 	spin_lock_irqsave(&pmu_lock, flags);
1309 	pmu_suspended++;
1310 	if (pmu_suspended > 1) {
1311 		spin_unlock_irqrestore(&pmu_lock, flags);
1312 		return;
1313 	}
1314 
1315 	do {
1316 		spin_unlock_irqrestore(&pmu_lock, flags);
1317 		if (req_awaiting_reply)
1318 			adb_int_pending = 1;
1319 		via_pmu_interrupt(0, NULL);
1320 		spin_lock_irqsave(&pmu_lock, flags);
1321 		if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1322 			if (gpio_irq >= 0)
1323 				disable_irq_nosync(gpio_irq);
1324 			out_8(&via1[IER], CB1_INT | IER_CLR);
1325 			spin_unlock_irqrestore(&pmu_lock, flags);
1326 			break;
1327 		}
1328 	} while (1);
1329 }
1330 
1331 void
pmu_resume(void)1332 pmu_resume(void)
1333 {
1334 	unsigned long flags;
1335 
1336 	if (pmu_state == uninitialized || pmu_suspended < 1)
1337 		return;
1338 
1339 	spin_lock_irqsave(&pmu_lock, flags);
1340 	pmu_suspended--;
1341 	if (pmu_suspended > 0) {
1342 		spin_unlock_irqrestore(&pmu_lock, flags);
1343 		return;
1344 	}
1345 	adb_int_pending = 1;
1346 	if (gpio_irq >= 0)
1347 		enable_irq(gpio_irq);
1348 	out_8(&via1[IER], CB1_INT | IER_SET);
1349 	spin_unlock_irqrestore(&pmu_lock, flags);
1350 	pmu_poll();
1351 }
1352 
1353 /* Interrupt data could be the result data from an ADB cmd */
1354 static void
pmu_handle_data(unsigned char * data,int len)1355 pmu_handle_data(unsigned char *data, int len)
1356 {
1357 	unsigned char ints;
1358 	int idx;
1359 	int i = 0;
1360 
1361 	asleep = 0;
1362 	if (drop_interrupts || len < 1) {
1363 		adb_int_pending = 0;
1364 		pmu_irq_stats[8]++;
1365 		return;
1366 	}
1367 
1368 	/* Get PMU interrupt mask */
1369 	ints = data[0];
1370 
1371 	/* Record zero interrupts for stats */
1372 	if (ints == 0)
1373 		pmu_irq_stats[9]++;
1374 
1375 	/* Hack to deal with ADB autopoll flag */
1376 	if (ints & PMU_INT_ADB)
1377 		ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1378 
1379 next:
1380 	if (ints == 0) {
1381 		if (i > pmu_irq_stats[10])
1382 			pmu_irq_stats[10] = i;
1383 		return;
1384 	}
1385 	i++;
1386 
1387 	idx = ffs(ints) - 1;
1388 	ints &= ~BIT(idx);
1389 
1390 	pmu_irq_stats[idx]++;
1391 
1392 	/* Note: for some reason, we get an interrupt with len=1,
1393 	 * data[0]==0 after each normal ADB interrupt, at least
1394 	 * on the Pismo. Still investigating...  --BenH
1395 	 */
1396 	switch (BIT(idx)) {
1397 	case PMU_INT_ADB:
1398 		if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1399 			struct adb_request *req = req_awaiting_reply;
1400 			if (!req) {
1401 				printk(KERN_ERR "PMU: extra ADB reply\n");
1402 				return;
1403 			}
1404 			req_awaiting_reply = NULL;
1405 			if (len <= 2)
1406 				req->reply_len = 0;
1407 			else {
1408 				memcpy(req->reply, data + 1, len - 1);
1409 				req->reply_len = len - 1;
1410 			}
1411 			pmu_done(req);
1412 		} else {
1413 #ifdef CONFIG_XMON
1414 			if (len == 4 && data[1] == 0x2c) {
1415 				extern int xmon_wants_key, xmon_adb_keycode;
1416 				if (xmon_wants_key) {
1417 					xmon_adb_keycode = data[2];
1418 					return;
1419 				}
1420 			}
1421 #endif /* CONFIG_XMON */
1422 #ifdef CONFIG_ADB
1423 			/*
1424 			 * XXX On the [23]400 the PMU gives us an up
1425 			 * event for keycodes 0x74 or 0x75 when the PC
1426 			 * card eject buttons are released, so we
1427 			 * ignore those events.
1428 			 */
1429 			if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1430 			      && data[1] == 0x2c && data[3] == 0xff
1431 			      && (data[2] & ~1) == 0xf4))
1432 				adb_input(data+1, len-1, 1);
1433 #endif /* CONFIG_ADB */
1434 		}
1435 		break;
1436 
1437 	/* Sound/brightness button pressed */
1438 	case PMU_INT_SNDBRT:
1439 #ifdef CONFIG_PMAC_BACKLIGHT
1440 		if (len == 3)
1441 			pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1442 #endif
1443 		break;
1444 
1445 	/* Tick interrupt */
1446 	case PMU_INT_TICK:
1447 		/* Environment or tick interrupt, query batteries */
1448 		if (pmu_battery_count) {
1449 			if ((--query_batt_timer) == 0) {
1450 				query_battery_state();
1451 				query_batt_timer = BATTERY_POLLING_COUNT;
1452 			}
1453 		}
1454 		break;
1455 
1456 	case PMU_INT_ENVIRONMENT:
1457 		if (pmu_battery_count)
1458 			query_battery_state();
1459 		pmu_pass_intr(data, len);
1460 		/* len == 6 is probably a bad check. But how do I
1461 		 * know what PMU versions send what events here? */
1462 		if (len == 6) {
1463 			via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1464 			via_pmu_event(PMU_EVT_LID, data[1]&1);
1465 		}
1466 		break;
1467 
1468 	default:
1469 	       pmu_pass_intr(data, len);
1470 	}
1471 	goto next;
1472 }
1473 
1474 static struct adb_request*
pmu_sr_intr(void)1475 pmu_sr_intr(void)
1476 {
1477 	struct adb_request *req;
1478 	int bite = 0;
1479 
1480 	if (in_8(&via2[B]) & TREQ) {
1481 		printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1482 		return NULL;
1483 	}
1484 	/* The ack may not yet be low when we get the interrupt */
1485 	while ((in_8(&via2[B]) & TACK) != 0)
1486 			;
1487 
1488 	/* if reading grab the byte, and reset the interrupt */
1489 	if (pmu_state == reading || pmu_state == reading_intr)
1490 		bite = in_8(&via1[SR]);
1491 
1492 	/* reset TREQ and wait for TACK to go high */
1493 	out_8(&via2[B], in_8(&via2[B]) | TREQ);
1494 	wait_for_ack();
1495 
1496 	switch (pmu_state) {
1497 	case sending:
1498 		req = current_req;
1499 		if (data_len < 0) {
1500 			data_len = req->nbytes - 1;
1501 			send_byte(data_len);
1502 			break;
1503 		}
1504 		if (data_index <= data_len) {
1505 			send_byte(req->data[data_index++]);
1506 			break;
1507 		}
1508 		req->sent = 1;
1509 		data_len = pmu_data_len[req->data[0]][1];
1510 		if (data_len == 0) {
1511 			pmu_state = idle;
1512 			current_req = req->next;
1513 			if (req->reply_expected)
1514 				req_awaiting_reply = req;
1515 			else
1516 				return req;
1517 		} else {
1518 			pmu_state = reading;
1519 			data_index = 0;
1520 			reply_ptr = req->reply + req->reply_len;
1521 			recv_byte();
1522 		}
1523 		break;
1524 
1525 	case intack:
1526 		data_index = 0;
1527 		data_len = -1;
1528 		pmu_state = reading_intr;
1529 		reply_ptr = interrupt_data[int_data_last];
1530 		recv_byte();
1531 		if (gpio_irq >= 0 && !gpio_irq_enabled) {
1532 			enable_irq(gpio_irq);
1533 			gpio_irq_enabled = 1;
1534 		}
1535 		break;
1536 
1537 	case reading:
1538 	case reading_intr:
1539 		if (data_len == -1) {
1540 			data_len = bite;
1541 			if (bite > 32)
1542 				printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1543 		} else if (data_index < 32) {
1544 			reply_ptr[data_index++] = bite;
1545 		}
1546 		if (data_index < data_len) {
1547 			recv_byte();
1548 			break;
1549 		}
1550 
1551 		if (pmu_state == reading_intr) {
1552 			pmu_state = idle;
1553 			int_data_state[int_data_last] = int_data_ready;
1554 			interrupt_data_len[int_data_last] = data_len;
1555 		} else {
1556 			req = current_req;
1557 			/*
1558 			 * For PMU sleep and freq change requests, we lock the
1559 			 * PMU until it's explicitly unlocked. This avoids any
1560 			 * spurrious event polling getting in
1561 			 */
1562 			current_req = req->next;
1563 			req->reply_len += data_index;
1564 			if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1565 				pmu_state = locked;
1566 			else
1567 				pmu_state = idle;
1568 			return req;
1569 		}
1570 		break;
1571 
1572 	default:
1573 		printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1574 		       pmu_state);
1575 	}
1576 	return NULL;
1577 }
1578 
1579 static irqreturn_t
via_pmu_interrupt(int irq,void * arg)1580 via_pmu_interrupt(int irq, void *arg)
1581 {
1582 	unsigned long flags;
1583 	int intr;
1584 	int nloop = 0;
1585 	int int_data = -1;
1586 	struct adb_request *req = NULL;
1587 	int handled = 0;
1588 
1589 	/* This is a bit brutal, we can probably do better */
1590 	spin_lock_irqsave(&pmu_lock, flags);
1591 	++disable_poll;
1592 
1593 	for (;;) {
1594 		/* On 68k Macs, VIA interrupts are dispatched individually.
1595 		 * Unless we are polling, the relevant IRQ flag has already
1596 		 * been cleared.
1597 		 */
1598 		intr = 0;
1599 		if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1600 			intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1601 			out_8(&via1[IFR], intr);
1602 		}
1603 #ifndef CONFIG_PPC_PMAC
1604 		switch (irq) {
1605 		case IRQ_MAC_ADB_CL:
1606 			intr = CB1_INT;
1607 			break;
1608 		case IRQ_MAC_ADB_SR:
1609 			intr = SR_INT;
1610 			break;
1611 		}
1612 #endif
1613 		if (intr == 0)
1614 			break;
1615 		handled = 1;
1616 		if (++nloop > 1000) {
1617 			printk(KERN_DEBUG "PMU: stuck in intr loop, "
1618 			       "intr=%x, ier=%x pmu_state=%d\n",
1619 			       intr, in_8(&via1[IER]), pmu_state);
1620 			break;
1621 		}
1622 		if (intr & CB1_INT) {
1623 			adb_int_pending = 1;
1624 			pmu_irq_stats[11]++;
1625 		}
1626 		if (intr & SR_INT) {
1627 			req = pmu_sr_intr();
1628 			if (req)
1629 				break;
1630 		}
1631 #ifndef CONFIG_PPC_PMAC
1632 		break;
1633 #endif
1634 	}
1635 
1636 recheck:
1637 	if (pmu_state == idle) {
1638 		if (adb_int_pending) {
1639 			if (int_data_state[0] == int_data_empty)
1640 				int_data_last = 0;
1641 			else if (int_data_state[1] == int_data_empty)
1642 				int_data_last = 1;
1643 			else
1644 				goto no_free_slot;
1645 			pmu_state = intack;
1646 			int_data_state[int_data_last] = int_data_fill;
1647 			/* Sounds safer to make sure ACK is high before writing.
1648 			 * This helped kill a problem with ADB and some iBooks
1649 			 */
1650 			wait_for_ack();
1651 			send_byte(PMU_INT_ACK);
1652 			adb_int_pending = 0;
1653 		} else if (current_req)
1654 			pmu_start();
1655 	}
1656 no_free_slot:
1657 	/* Mark the oldest buffer for flushing */
1658 	if (int_data_state[!int_data_last] == int_data_ready) {
1659 		int_data_state[!int_data_last] = int_data_flush;
1660 		int_data = !int_data_last;
1661 	} else if (int_data_state[int_data_last] == int_data_ready) {
1662 		int_data_state[int_data_last] = int_data_flush;
1663 		int_data = int_data_last;
1664 	}
1665 	--disable_poll;
1666 	spin_unlock_irqrestore(&pmu_lock, flags);
1667 
1668 	/* Deal with completed PMU requests outside of the lock */
1669 	if (req) {
1670 		pmu_done(req);
1671 		req = NULL;
1672 	}
1673 
1674 	/* Deal with interrupt datas outside of the lock */
1675 	if (int_data >= 0) {
1676 		pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1677 		spin_lock_irqsave(&pmu_lock, flags);
1678 		++disable_poll;
1679 		int_data_state[int_data] = int_data_empty;
1680 		int_data = -1;
1681 		goto recheck;
1682 	}
1683 
1684 	return IRQ_RETVAL(handled);
1685 }
1686 
1687 void
pmu_unlock(void)1688 pmu_unlock(void)
1689 {
1690 	unsigned long flags;
1691 
1692 	spin_lock_irqsave(&pmu_lock, flags);
1693 	if (pmu_state == locked)
1694 		pmu_state = idle;
1695 	adb_int_pending = 1;
1696 	spin_unlock_irqrestore(&pmu_lock, flags);
1697 }
1698 
1699 
1700 static __maybe_unused irqreturn_t
gpio1_interrupt(int irq,void * arg)1701 gpio1_interrupt(int irq, void *arg)
1702 {
1703 	unsigned long flags;
1704 
1705 	if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1706 		spin_lock_irqsave(&pmu_lock, flags);
1707 		if (gpio_irq_enabled > 0) {
1708 			disable_irq_nosync(gpio_irq);
1709 			gpio_irq_enabled = 0;
1710 		}
1711 		pmu_irq_stats[12]++;
1712 		adb_int_pending = 1;
1713 		spin_unlock_irqrestore(&pmu_lock, flags);
1714 		via_pmu_interrupt(0, NULL);
1715 		return IRQ_HANDLED;
1716 	}
1717 	return IRQ_NONE;
1718 }
1719 
1720 void
pmu_enable_irled(int on)1721 pmu_enable_irled(int on)
1722 {
1723 	struct adb_request req;
1724 
1725 	if (pmu_state == uninitialized)
1726 		return ;
1727 	if (pmu_kind == PMU_KEYLARGO_BASED)
1728 		return ;
1729 
1730 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1731 	    (on ? PMU_POW_ON : PMU_POW_OFF));
1732 	pmu_wait_complete(&req);
1733 }
1734 
1735 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1736 #define RTC_OFFSET	2082844800
1737 
pmu_get_time(void)1738 time64_t pmu_get_time(void)
1739 {
1740 	struct adb_request req;
1741 	u32 now;
1742 
1743 	if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1744 		return 0;
1745 	pmu_wait_complete(&req);
1746 	if (req.reply_len != 4)
1747 		pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1748 	now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1749 	      (req.reply[2] << 8) + req.reply[3];
1750 	return (time64_t)now - RTC_OFFSET;
1751 }
1752 
pmu_set_rtc_time(struct rtc_time * tm)1753 int pmu_set_rtc_time(struct rtc_time *tm)
1754 {
1755 	u32 now;
1756 	struct adb_request req;
1757 
1758 	now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1759 	if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1760 	                now >> 24, now >> 16, now >> 8, now) < 0)
1761 		return -ENXIO;
1762 	pmu_wait_complete(&req);
1763 	if (req.reply_len != 0)
1764 		pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1765 	return 0;
1766 }
1767 
1768 void
pmu_restart(void)1769 pmu_restart(void)
1770 {
1771 	struct adb_request req;
1772 
1773 	if (pmu_state == uninitialized)
1774 		return;
1775 
1776 	local_irq_disable();
1777 
1778 	drop_interrupts = 1;
1779 
1780 	if (pmu_kind != PMU_KEYLARGO_BASED) {
1781 		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1782 						PMU_INT_TICK );
1783 		while(!req.complete)
1784 			pmu_poll();
1785 	}
1786 
1787 	pmu_request(&req, NULL, 1, PMU_RESET);
1788 	pmu_wait_complete(&req);
1789 	for (;;)
1790 		;
1791 }
1792 
1793 void
pmu_shutdown(void)1794 pmu_shutdown(void)
1795 {
1796 	struct adb_request req;
1797 
1798 	if (pmu_state == uninitialized)
1799 		return;
1800 
1801 	local_irq_disable();
1802 
1803 	drop_interrupts = 1;
1804 
1805 	if (pmu_kind != PMU_KEYLARGO_BASED) {
1806 		pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1807 						PMU_INT_TICK );
1808 		pmu_wait_complete(&req);
1809 	} else {
1810 		/* Disable server mode on shutdown or we'll just
1811 		 * wake up again
1812 		 */
1813 		pmu_set_server_mode(0);
1814 	}
1815 
1816 	pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1817 		    'M', 'A', 'T', 'T');
1818 	pmu_wait_complete(&req);
1819 	for (;;)
1820 		;
1821 }
1822 
1823 int
pmu_present(void)1824 pmu_present(void)
1825 {
1826 	return pmu_state != uninitialized;
1827 }
1828 
1829 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1830 /*
1831  * Put the powerbook to sleep.
1832  */
1833 
1834 static u32 save_via[8];
1835 static int __fake_sleep;
1836 
1837 static void
save_via_state(void)1838 save_via_state(void)
1839 {
1840 	save_via[0] = in_8(&via1[ANH]);
1841 	save_via[1] = in_8(&via1[DIRA]);
1842 	save_via[2] = in_8(&via1[B]);
1843 	save_via[3] = in_8(&via1[DIRB]);
1844 	save_via[4] = in_8(&via1[PCR]);
1845 	save_via[5] = in_8(&via1[ACR]);
1846 	save_via[6] = in_8(&via1[T1CL]);
1847 	save_via[7] = in_8(&via1[T1CH]);
1848 }
1849 static void
restore_via_state(void)1850 restore_via_state(void)
1851 {
1852 	out_8(&via1[ANH],  save_via[0]);
1853 	out_8(&via1[DIRA], save_via[1]);
1854 	out_8(&via1[B],    save_via[2]);
1855 	out_8(&via1[DIRB], save_via[3]);
1856 	out_8(&via1[PCR],  save_via[4]);
1857 	out_8(&via1[ACR],  save_via[5]);
1858 	out_8(&via1[T1CL], save_via[6]);
1859 	out_8(&via1[T1CH], save_via[7]);
1860 	out_8(&via1[IER], IER_CLR | 0x7f);	/* disable all intrs */
1861 	out_8(&via1[IFR], 0x7f);			/* clear IFR */
1862 	out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1863 }
1864 
1865 #define	GRACKLE_PM	(1<<7)
1866 #define GRACKLE_DOZE	(1<<5)
1867 #define	GRACKLE_NAP	(1<<4)
1868 #define	GRACKLE_SLEEP	(1<<3)
1869 
powerbook_sleep_grackle(void)1870 static int powerbook_sleep_grackle(void)
1871 {
1872 	unsigned long save_l2cr;
1873 	unsigned short pmcr1;
1874 	struct adb_request req;
1875 	struct pci_dev *grackle;
1876 
1877 	grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1878 	if (!grackle)
1879 		return -ENODEV;
1880 
1881 	/* Turn off various things. Darwin does some retry tests here... */
1882 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1883 	pmu_wait_complete(&req);
1884 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1885 		PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1886 	pmu_wait_complete(&req);
1887 
1888 	/* For 750, save backside cache setting and disable it */
1889 	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1890 
1891 	if (!__fake_sleep) {
1892 		/* Ask the PMU to put us to sleep */
1893 		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1894 		pmu_wait_complete(&req);
1895 	}
1896 
1897 	/* The VIA is supposed not to be restored correctly*/
1898 	save_via_state();
1899 	/* We shut down some HW */
1900 	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1901 
1902 	pci_read_config_word(grackle, 0x70, &pmcr1);
1903 	/* Apparently, MacOS uses NAP mode for Grackle ??? */
1904 	pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1905 	pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1906 	pci_write_config_word(grackle, 0x70, pmcr1);
1907 
1908 	/* Call low-level ASM sleep handler */
1909 	if (__fake_sleep)
1910 		mdelay(5000);
1911 	else
1912 		low_sleep_handler();
1913 
1914 	/* We're awake again, stop grackle PM */
1915 	pci_read_config_word(grackle, 0x70, &pmcr1);
1916 	pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1917 	pci_write_config_word(grackle, 0x70, pmcr1);
1918 
1919 	pci_dev_put(grackle);
1920 
1921 	/* Make sure the PMU is idle */
1922 	pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1923 	restore_via_state();
1924 
1925 	/* Restore L2 cache */
1926 	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1927  		_set_L2CR(save_l2cr);
1928 
1929 	/* Restore userland MMU context */
1930 	switch_mmu_context(NULL, current->active_mm, NULL);
1931 
1932 	/* Power things up */
1933 	pmu_unlock();
1934 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1935 	pmu_wait_complete(&req);
1936 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1937 			PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1938 	pmu_wait_complete(&req);
1939 	pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1940 			PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1941 	pmu_wait_complete(&req);
1942 
1943 	return 0;
1944 }
1945 
1946 static int
powerbook_sleep_Core99(void)1947 powerbook_sleep_Core99(void)
1948 {
1949 	unsigned long save_l2cr;
1950 	unsigned long save_l3cr;
1951 	struct adb_request req;
1952 
1953 	if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1954 		printk(KERN_ERR "Sleep mode not supported on this machine\n");
1955 		return -ENOSYS;
1956 	}
1957 
1958 	if (num_online_cpus() > 1 || cpu_is_offline(0))
1959 		return -EAGAIN;
1960 
1961 	/* Stop environment and ADB interrupts */
1962 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1963 	pmu_wait_complete(&req);
1964 
1965 	/* Tell PMU what events will wake us up */
1966 	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1967 		0xff, 0xff);
1968 	pmu_wait_complete(&req);
1969 	pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1970 		0, PMU_PWR_WAKEUP_KEY |
1971 		(option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1972 	pmu_wait_complete(&req);
1973 
1974 	/* Save the state of the L2 and L3 caches */
1975 	save_l3cr = _get_L3CR();	/* (returns -1 if not available) */
1976 	save_l2cr = _get_L2CR();	/* (returns -1 if not available) */
1977 
1978 	if (!__fake_sleep) {
1979 		/* Ask the PMU to put us to sleep */
1980 		pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1981 		pmu_wait_complete(&req);
1982 	}
1983 
1984 	/* The VIA is supposed not to be restored correctly*/
1985 	save_via_state();
1986 
1987 	/* Shut down various ASICs. There's a chance that we can no longer
1988 	 * talk to the PMU after this, so I moved it to _after_ sending the
1989 	 * sleep command to it. Still need to be checked.
1990 	 */
1991 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1992 
1993 	/* Call low-level ASM sleep handler */
1994 	if (__fake_sleep)
1995 		mdelay(5000);
1996 	else
1997 		low_sleep_handler();
1998 
1999 	/* Restore Apple core ASICs state */
2000 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2001 
2002 	/* Restore VIA */
2003 	restore_via_state();
2004 
2005 	/* tweak LPJ before cpufreq is there */
2006 	loops_per_jiffy *= 2;
2007 
2008 	/* Restore video */
2009 	pmac_call_early_video_resume();
2010 
2011 	/* Restore L2 cache */
2012 	if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2013  		_set_L2CR(save_l2cr);
2014 	/* Restore L3 cache */
2015 	if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2016  		_set_L3CR(save_l3cr);
2017 
2018 	/* Restore userland MMU context */
2019 	switch_mmu_context(NULL, current->active_mm, NULL);
2020 
2021 	/* Tell PMU we are ready */
2022 	pmu_unlock();
2023 	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2024 	pmu_wait_complete(&req);
2025 	pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2026 	pmu_wait_complete(&req);
2027 
2028 	/* Restore LPJ, cpufreq will adjust the cpu frequency */
2029 	loops_per_jiffy /= 2;
2030 
2031 	return 0;
2032 }
2033 
2034 #define PB3400_MEM_CTRL		0xf8000000
2035 #define PB3400_MEM_CTRL_SLEEP	0x70
2036 
2037 static void __iomem *pb3400_mem_ctrl;
2038 
powerbook_sleep_init_3400(void)2039 static void powerbook_sleep_init_3400(void)
2040 {
2041 	/* map in the memory controller registers */
2042 	pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2043 	if (pb3400_mem_ctrl == NULL)
2044 		printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2045 }
2046 
powerbook_sleep_3400(void)2047 static int powerbook_sleep_3400(void)
2048 {
2049 	int i, x;
2050 	unsigned int hid0;
2051 	unsigned long msr;
2052 	struct adb_request sleep_req;
2053 	unsigned int __iomem *mem_ctrl_sleep;
2054 
2055 	if (pb3400_mem_ctrl == NULL)
2056 		return -ENOMEM;
2057 	mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2058 
2059 	/* Set the memory controller to keep the memory refreshed
2060 	   while we're asleep */
2061 	for (i = 0x403f; i >= 0x4000; --i) {
2062 		out_be32(mem_ctrl_sleep, i);
2063 		do {
2064 			x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2065 		} while (x == 0);
2066 		if (x >= 0x100)
2067 			break;
2068 	}
2069 
2070 	/* Ask the PMU to put us to sleep */
2071 	pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2072 	pmu_wait_complete(&sleep_req);
2073 	pmu_unlock();
2074 
2075 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2076 
2077 	asleep = 1;
2078 
2079 	/* Put the CPU into sleep mode */
2080 	hid0 = mfspr(SPRN_HID0);
2081 	hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2082 	mtspr(SPRN_HID0, hid0);
2083 	local_irq_enable();
2084 	msr = mfmsr() | MSR_POW;
2085 	while (asleep) {
2086 		mb();
2087 		mtmsr(msr);
2088 		isync();
2089 	}
2090 	local_irq_disable();
2091 
2092 	/* OK, we're awake again, start restoring things */
2093 	out_be32(mem_ctrl_sleep, 0x3f);
2094 	pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2095 
2096 	return 0;
2097 }
2098 
2099 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2100 
2101 /*
2102  * Support for /dev/pmu device
2103  */
2104 #define RB_SIZE		0x10
2105 struct pmu_private {
2106 	struct list_head list;
2107 	int	rb_get;
2108 	int	rb_put;
2109 	struct rb_entry {
2110 		unsigned short len;
2111 		unsigned char data[16];
2112 	}	rb_buf[RB_SIZE];
2113 	wait_queue_head_t wait;
2114 	spinlock_t lock;
2115 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2116 	int	backlight_locker;
2117 #endif
2118 };
2119 
2120 static LIST_HEAD(all_pmu_pvt);
2121 static DEFINE_SPINLOCK(all_pvt_lock);
2122 
2123 static void
pmu_pass_intr(unsigned char * data,int len)2124 pmu_pass_intr(unsigned char *data, int len)
2125 {
2126 	struct pmu_private *pp;
2127 	struct list_head *list;
2128 	int i;
2129 	unsigned long flags;
2130 
2131 	if (len > sizeof(pp->rb_buf[0].data))
2132 		len = sizeof(pp->rb_buf[0].data);
2133 	spin_lock_irqsave(&all_pvt_lock, flags);
2134 	for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2135 		pp = list_entry(list, struct pmu_private, list);
2136 		spin_lock(&pp->lock);
2137 		i = pp->rb_put + 1;
2138 		if (i >= RB_SIZE)
2139 			i = 0;
2140 		if (i != pp->rb_get) {
2141 			struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2142 			rp->len = len;
2143 			memcpy(rp->data, data, len);
2144 			pp->rb_put = i;
2145 			wake_up_interruptible(&pp->wait);
2146 		}
2147 		spin_unlock(&pp->lock);
2148 	}
2149 	spin_unlock_irqrestore(&all_pvt_lock, flags);
2150 }
2151 
2152 static int
pmu_open(struct inode * inode,struct file * file)2153 pmu_open(struct inode *inode, struct file *file)
2154 {
2155 	struct pmu_private *pp;
2156 	unsigned long flags;
2157 
2158 	pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2159 	if (!pp)
2160 		return -ENOMEM;
2161 	pp->rb_get = pp->rb_put = 0;
2162 	spin_lock_init(&pp->lock);
2163 	init_waitqueue_head(&pp->wait);
2164 	mutex_lock(&pmu_info_proc_mutex);
2165 	spin_lock_irqsave(&all_pvt_lock, flags);
2166 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2167 	pp->backlight_locker = 0;
2168 #endif
2169 	list_add(&pp->list, &all_pmu_pvt);
2170 	spin_unlock_irqrestore(&all_pvt_lock, flags);
2171 	file->private_data = pp;
2172 	mutex_unlock(&pmu_info_proc_mutex);
2173 	return 0;
2174 }
2175 
2176 static ssize_t
pmu_read(struct file * file,char __user * buf,size_t count,loff_t * ppos)2177 pmu_read(struct file *file, char __user *buf,
2178 			size_t count, loff_t *ppos)
2179 {
2180 	struct pmu_private *pp = file->private_data;
2181 	DECLARE_WAITQUEUE(wait, current);
2182 	unsigned long flags;
2183 	int ret = 0;
2184 
2185 	if (count < 1 || !pp)
2186 		return -EINVAL;
2187 
2188 	spin_lock_irqsave(&pp->lock, flags);
2189 	add_wait_queue(&pp->wait, &wait);
2190 	set_current_state(TASK_INTERRUPTIBLE);
2191 
2192 	for (;;) {
2193 		ret = -EAGAIN;
2194 		if (pp->rb_get != pp->rb_put) {
2195 			int i = pp->rb_get;
2196 			struct rb_entry *rp = &pp->rb_buf[i];
2197 			ret = rp->len;
2198 			spin_unlock_irqrestore(&pp->lock, flags);
2199 			if (ret > count)
2200 				ret = count;
2201 			if (ret > 0 && copy_to_user(buf, rp->data, ret))
2202 				ret = -EFAULT;
2203 			if (++i >= RB_SIZE)
2204 				i = 0;
2205 			spin_lock_irqsave(&pp->lock, flags);
2206 			pp->rb_get = i;
2207 		}
2208 		if (ret >= 0)
2209 			break;
2210 		if (file->f_flags & O_NONBLOCK)
2211 			break;
2212 		ret = -ERESTARTSYS;
2213 		if (signal_pending(current))
2214 			break;
2215 		spin_unlock_irqrestore(&pp->lock, flags);
2216 		schedule();
2217 		spin_lock_irqsave(&pp->lock, flags);
2218 	}
2219 	__set_current_state(TASK_RUNNING);
2220 	remove_wait_queue(&pp->wait, &wait);
2221 	spin_unlock_irqrestore(&pp->lock, flags);
2222 
2223 	return ret;
2224 }
2225 
2226 static ssize_t
pmu_write(struct file * file,const char __user * buf,size_t count,loff_t * ppos)2227 pmu_write(struct file *file, const char __user *buf,
2228 			 size_t count, loff_t *ppos)
2229 {
2230 	return 0;
2231 }
2232 
2233 static __poll_t
pmu_fpoll(struct file * filp,poll_table * wait)2234 pmu_fpoll(struct file *filp, poll_table *wait)
2235 {
2236 	struct pmu_private *pp = filp->private_data;
2237 	__poll_t mask = 0;
2238 	unsigned long flags;
2239 
2240 	if (!pp)
2241 		return 0;
2242 	poll_wait(filp, &pp->wait, wait);
2243 	spin_lock_irqsave(&pp->lock, flags);
2244 	if (pp->rb_get != pp->rb_put)
2245 		mask |= EPOLLIN;
2246 	spin_unlock_irqrestore(&pp->lock, flags);
2247 	return mask;
2248 }
2249 
2250 static int
pmu_release(struct inode * inode,struct file * file)2251 pmu_release(struct inode *inode, struct file *file)
2252 {
2253 	struct pmu_private *pp = file->private_data;
2254 	unsigned long flags;
2255 
2256 	if (pp) {
2257 		file->private_data = NULL;
2258 		spin_lock_irqsave(&all_pvt_lock, flags);
2259 		list_del(&pp->list);
2260 		spin_unlock_irqrestore(&all_pvt_lock, flags);
2261 
2262 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2263 		if (pp->backlight_locker)
2264 			pmac_backlight_enable();
2265 #endif
2266 
2267 		kfree(pp);
2268 	}
2269 	return 0;
2270 }
2271 
2272 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
pmac_suspend_disable_irqs(void)2273 static void pmac_suspend_disable_irqs(void)
2274 {
2275 	/* Call platform functions marked "on sleep" */
2276 	pmac_pfunc_i2c_suspend();
2277 	pmac_pfunc_base_suspend();
2278 }
2279 
powerbook_sleep(suspend_state_t state)2280 static int powerbook_sleep(suspend_state_t state)
2281 {
2282 	int error = 0;
2283 
2284 	/* Wait for completion of async requests */
2285 	while (!batt_req.complete)
2286 		pmu_poll();
2287 
2288 	/* Giveup the lazy FPU & vec so we don't have to back them
2289 	 * up from the low level code
2290 	 */
2291 	enable_kernel_fp();
2292 
2293 #ifdef CONFIG_ALTIVEC
2294 	if (cpu_has_feature(CPU_FTR_ALTIVEC))
2295 		enable_kernel_altivec();
2296 #endif /* CONFIG_ALTIVEC */
2297 
2298 	switch (pmu_kind) {
2299 	case PMU_OHARE_BASED:
2300 		error = powerbook_sleep_3400();
2301 		break;
2302 	case PMU_HEATHROW_BASED:
2303 	case PMU_PADDINGTON_BASED:
2304 		error = powerbook_sleep_grackle();
2305 		break;
2306 	case PMU_KEYLARGO_BASED:
2307 		error = powerbook_sleep_Core99();
2308 		break;
2309 	default:
2310 		return -ENOSYS;
2311 	}
2312 
2313 	if (error)
2314 		return error;
2315 
2316 	mdelay(100);
2317 
2318 	return 0;
2319 }
2320 
pmac_suspend_enable_irqs(void)2321 static void pmac_suspend_enable_irqs(void)
2322 {
2323 	/* Force a poll of ADB interrupts */
2324 	adb_int_pending = 1;
2325 	via_pmu_interrupt(0, NULL);
2326 
2327 	mdelay(10);
2328 
2329 	/* Call platform functions marked "on wake" */
2330 	pmac_pfunc_base_resume();
2331 	pmac_pfunc_i2c_resume();
2332 }
2333 
pmu_sleep_valid(suspend_state_t state)2334 static int pmu_sleep_valid(suspend_state_t state)
2335 {
2336 	return state == PM_SUSPEND_MEM
2337 		&& (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2338 }
2339 
2340 static const struct platform_suspend_ops pmu_pm_ops = {
2341 	.enter = powerbook_sleep,
2342 	.valid = pmu_sleep_valid,
2343 };
2344 
register_pmu_pm_ops(void)2345 static int register_pmu_pm_ops(void)
2346 {
2347 	if (pmu_kind == PMU_OHARE_BASED)
2348 		powerbook_sleep_init_3400();
2349 	ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2350 	ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2351 	suspend_set_ops(&pmu_pm_ops);
2352 
2353 	return 0;
2354 }
2355 
2356 device_initcall(register_pmu_pm_ops);
2357 #endif
2358 
pmu_ioctl(struct file * filp,u_int cmd,u_long arg)2359 static int pmu_ioctl(struct file *filp,
2360 		     u_int cmd, u_long arg)
2361 {
2362 	__u32 __user *argp = (__u32 __user *)arg;
2363 	int error = -EINVAL;
2364 
2365 	switch (cmd) {
2366 #ifdef CONFIG_PPC_PMAC
2367 	case PMU_IOC_SLEEP:
2368 		if (!capable(CAP_SYS_ADMIN))
2369 			return -EACCES;
2370 		return pm_suspend(PM_SUSPEND_MEM);
2371 	case PMU_IOC_CAN_SLEEP:
2372 		if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2373 			return put_user(0, argp);
2374 		else
2375 			return put_user(1, argp);
2376 #endif
2377 
2378 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2379 	/* Compatibility ioctl's for backlight */
2380 	case PMU_IOC_GET_BACKLIGHT:
2381 	{
2382 		int brightness;
2383 
2384 		brightness = pmac_backlight_get_legacy_brightness();
2385 		if (brightness < 0)
2386 			return brightness;
2387 		else
2388 			return put_user(brightness, argp);
2389 
2390 	}
2391 	case PMU_IOC_SET_BACKLIGHT:
2392 	{
2393 		int brightness;
2394 
2395 		error = get_user(brightness, argp);
2396 		if (error)
2397 			return error;
2398 
2399 		return pmac_backlight_set_legacy_brightness(brightness);
2400 	}
2401 #ifdef CONFIG_INPUT_ADBHID
2402 	case PMU_IOC_GRAB_BACKLIGHT: {
2403 		struct pmu_private *pp = filp->private_data;
2404 
2405 		if (pp->backlight_locker)
2406 			return 0;
2407 
2408 		pp->backlight_locker = 1;
2409 		pmac_backlight_disable();
2410 
2411 		return 0;
2412 	}
2413 #endif /* CONFIG_INPUT_ADBHID */
2414 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2415 
2416 	case PMU_IOC_GET_MODEL:
2417 	    	return put_user(pmu_kind, argp);
2418 	case PMU_IOC_HAS_ADB:
2419 		return put_user(pmu_has_adb, argp);
2420 	}
2421 	return error;
2422 }
2423 
pmu_unlocked_ioctl(struct file * filp,u_int cmd,u_long arg)2424 static long pmu_unlocked_ioctl(struct file *filp,
2425 			       u_int cmd, u_long arg)
2426 {
2427 	int ret;
2428 
2429 	mutex_lock(&pmu_info_proc_mutex);
2430 	ret = pmu_ioctl(filp, cmd, arg);
2431 	mutex_unlock(&pmu_info_proc_mutex);
2432 
2433 	return ret;
2434 }
2435 
2436 #ifdef CONFIG_COMPAT
2437 #define PMU_IOC_GET_BACKLIGHT32	_IOR('B', 1, compat_size_t)
2438 #define PMU_IOC_SET_BACKLIGHT32	_IOW('B', 2, compat_size_t)
2439 #define PMU_IOC_GET_MODEL32	_IOR('B', 3, compat_size_t)
2440 #define PMU_IOC_HAS_ADB32	_IOR('B', 4, compat_size_t)
2441 #define PMU_IOC_CAN_SLEEP32	_IOR('B', 5, compat_size_t)
2442 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2443 
compat_pmu_ioctl(struct file * filp,u_int cmd,u_long arg)2444 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2445 {
2446 	switch (cmd) {
2447 	case PMU_IOC_SLEEP:
2448 		break;
2449 	case PMU_IOC_GET_BACKLIGHT32:
2450 		cmd = PMU_IOC_GET_BACKLIGHT;
2451 		break;
2452 	case PMU_IOC_SET_BACKLIGHT32:
2453 		cmd = PMU_IOC_SET_BACKLIGHT;
2454 		break;
2455 	case PMU_IOC_GET_MODEL32:
2456 		cmd = PMU_IOC_GET_MODEL;
2457 		break;
2458 	case PMU_IOC_HAS_ADB32:
2459 		cmd = PMU_IOC_HAS_ADB;
2460 		break;
2461 	case PMU_IOC_CAN_SLEEP32:
2462 		cmd = PMU_IOC_CAN_SLEEP;
2463 		break;
2464 	case PMU_IOC_GRAB_BACKLIGHT32:
2465 		cmd = PMU_IOC_GRAB_BACKLIGHT;
2466 		break;
2467 	default:
2468 		return -ENOIOCTLCMD;
2469 	}
2470 	return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2471 }
2472 #endif
2473 
2474 static const struct file_operations pmu_device_fops = {
2475 	.read		= pmu_read,
2476 	.write		= pmu_write,
2477 	.poll		= pmu_fpoll,
2478 	.unlocked_ioctl	= pmu_unlocked_ioctl,
2479 #ifdef CONFIG_COMPAT
2480 	.compat_ioctl	= compat_pmu_ioctl,
2481 #endif
2482 	.open		= pmu_open,
2483 	.release	= pmu_release,
2484 	.llseek		= noop_llseek,
2485 };
2486 
2487 static struct miscdevice pmu_device = {
2488 	PMU_MINOR, "pmu", &pmu_device_fops
2489 };
2490 
pmu_device_init(void)2491 static int pmu_device_init(void)
2492 {
2493 	if (pmu_state == uninitialized)
2494 		return 0;
2495 	if (misc_register(&pmu_device) < 0)
2496 		printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2497 	return 0;
2498 }
2499 device_initcall(pmu_device_init);
2500 
2501 
2502 #ifdef DEBUG_SLEEP
2503 static inline void
polled_handshake(void)2504 polled_handshake(void)
2505 {
2506 	via2[B] &= ~TREQ; eieio();
2507 	while ((via2[B] & TACK) != 0)
2508 		;
2509 	via2[B] |= TREQ; eieio();
2510 	while ((via2[B] & TACK) == 0)
2511 		;
2512 }
2513 
2514 static inline void
polled_send_byte(int x)2515 polled_send_byte(int x)
2516 {
2517 	via1[ACR] |= SR_OUT | SR_EXT; eieio();
2518 	via1[SR] = x; eieio();
2519 	polled_handshake();
2520 }
2521 
2522 static inline int
polled_recv_byte(void)2523 polled_recv_byte(void)
2524 {
2525 	int x;
2526 
2527 	via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2528 	x = via1[SR]; eieio();
2529 	polled_handshake();
2530 	x = via1[SR]; eieio();
2531 	return x;
2532 }
2533 
2534 int
pmu_polled_request(struct adb_request * req)2535 pmu_polled_request(struct adb_request *req)
2536 {
2537 	unsigned long flags;
2538 	int i, l, c;
2539 
2540 	req->complete = 1;
2541 	c = req->data[0];
2542 	l = pmu_data_len[c][0];
2543 	if (l >= 0 && req->nbytes != l + 1)
2544 		return -EINVAL;
2545 
2546 	local_irq_save(flags);
2547 	while (pmu_state != idle)
2548 		pmu_poll();
2549 
2550 	while ((via2[B] & TACK) == 0)
2551 		;
2552 	polled_send_byte(c);
2553 	if (l < 0) {
2554 		l = req->nbytes - 1;
2555 		polled_send_byte(l);
2556 	}
2557 	for (i = 1; i <= l; ++i)
2558 		polled_send_byte(req->data[i]);
2559 
2560 	l = pmu_data_len[c][1];
2561 	if (l < 0)
2562 		l = polled_recv_byte();
2563 	for (i = 0; i < l; ++i)
2564 		req->reply[i + req->reply_len] = polled_recv_byte();
2565 
2566 	if (req->done)
2567 		(*req->done)(req);
2568 
2569 	local_irq_restore(flags);
2570 	return 0;
2571 }
2572 
2573 /* N.B. This doesn't work on the 3400 */
pmu_blink(int n)2574 void pmu_blink(int n)
2575 {
2576 	struct adb_request req;
2577 
2578 	memset(&req, 0, sizeof(req));
2579 
2580 	for (; n > 0; --n) {
2581 		req.nbytes = 4;
2582 		req.done = NULL;
2583 		req.data[0] = 0xee;
2584 		req.data[1] = 4;
2585 		req.data[2] = 0;
2586 		req.data[3] = 1;
2587 		req.reply[0] = ADB_RET_OK;
2588 		req.reply_len = 1;
2589 		req.reply_expected = 0;
2590 		pmu_polled_request(&req);
2591 		mdelay(50);
2592 		req.nbytes = 4;
2593 		req.done = NULL;
2594 		req.data[0] = 0xee;
2595 		req.data[1] = 4;
2596 		req.data[2] = 0;
2597 		req.data[3] = 0;
2598 		req.reply[0] = ADB_RET_OK;
2599 		req.reply_len = 1;
2600 		req.reply_expected = 0;
2601 		pmu_polled_request(&req);
2602 		mdelay(50);
2603 	}
2604 	mdelay(50);
2605 }
2606 #endif /* DEBUG_SLEEP */
2607 
2608 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2609 int pmu_sys_suspended;
2610 
pmu_syscore_suspend(void)2611 static int pmu_syscore_suspend(void)
2612 {
2613 	/* Suspend PMU event interrupts */
2614 	pmu_suspend();
2615 	pmu_sys_suspended = 1;
2616 
2617 #ifdef CONFIG_PMAC_BACKLIGHT
2618 	/* Tell backlight code not to muck around with the chip anymore */
2619 	pmu_backlight_set_sleep(1);
2620 #endif
2621 
2622 	return 0;
2623 }
2624 
pmu_syscore_resume(void)2625 static void pmu_syscore_resume(void)
2626 {
2627 	struct adb_request req;
2628 
2629 	if (!pmu_sys_suspended)
2630 		return;
2631 
2632 	/* Tell PMU we are ready */
2633 	pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2634 	pmu_wait_complete(&req);
2635 
2636 #ifdef CONFIG_PMAC_BACKLIGHT
2637 	/* Tell backlight code it can use the chip again */
2638 	pmu_backlight_set_sleep(0);
2639 #endif
2640 	/* Resume PMU event interrupts */
2641 	pmu_resume();
2642 	pmu_sys_suspended = 0;
2643 }
2644 
2645 static struct syscore_ops pmu_syscore_ops = {
2646 	.suspend = pmu_syscore_suspend,
2647 	.resume = pmu_syscore_resume,
2648 };
2649 
pmu_syscore_register(void)2650 static int pmu_syscore_register(void)
2651 {
2652 	register_syscore_ops(&pmu_syscore_ops);
2653 
2654 	return 0;
2655 }
2656 subsys_initcall(pmu_syscore_register);
2657 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2658 
2659 EXPORT_SYMBOL(pmu_request);
2660 EXPORT_SYMBOL(pmu_queue_request);
2661 EXPORT_SYMBOL(pmu_poll);
2662 EXPORT_SYMBOL(pmu_poll_adb);
2663 EXPORT_SYMBOL(pmu_wait_complete);
2664 EXPORT_SYMBOL(pmu_suspend);
2665 EXPORT_SYMBOL(pmu_resume);
2666 EXPORT_SYMBOL(pmu_unlock);
2667 #if defined(CONFIG_PPC32)
2668 EXPORT_SYMBOL(pmu_enable_irled);
2669 EXPORT_SYMBOL(pmu_battery_count);
2670 EXPORT_SYMBOL(pmu_batteries);
2671 EXPORT_SYMBOL(pmu_power_flags);
2672 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2673 
2674