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Merge branch 'x86-timers-for-linus' of git://git.kernel.org/pub/scm/linux/kernel...
[mirror_ubuntu-hirsute-kernel.git] / drivers / macintosh / via-pmu.c
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 <asm/machdep.h>
54 #include <asm/io.h>
55 #include <asm/pgtable.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 /* Misc minor number allocated for /dev/pmu */
79 #define PMU_MINOR 154
80
81 /* How many iterations between battery polls */
82 #define BATTERY_POLLING_COUNT 2
83
84 static DEFINE_MUTEX(pmu_info_proc_mutex);
85
86 /* VIA registers - spaced 0x200 bytes apart */
87 #define RS 0x200 /* skip between registers */
88 #define B 0 /* B-side data */
89 #define A RS /* A-side data */
90 #define DIRB (2*RS) /* B-side direction (1=output) */
91 #define DIRA (3*RS) /* A-side direction (1=output) */
92 #define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
93 #define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
94 #define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
95 #define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
96 #define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
97 #define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
98 #define SR (10*RS) /* Shift register */
99 #define ACR (11*RS) /* Auxiliary control register */
100 #define PCR (12*RS) /* Peripheral control register */
101 #define IFR (13*RS) /* Interrupt flag register */
102 #define IER (14*RS) /* Interrupt enable register */
103 #define ANH (15*RS) /* A-side data, no handshake */
104
105 /* Bits in B data register: both active low */
106 #ifdef CONFIG_PPC_PMAC
107 #define TACK 0x08 /* Transfer acknowledge (input) */
108 #define TREQ 0x10 /* Transfer request (output) */
109 #else
110 #define TACK 0x02
111 #define TREQ 0x04
112 #endif
113
114 /* Bits in ACR */
115 #define SR_CTRL 0x1c /* Shift register control bits */
116 #define SR_EXT 0x0c /* Shift on external clock */
117 #define SR_OUT 0x10 /* Shift out if 1 */
118
119 /* Bits in IFR and IER */
120 #define IER_SET 0x80 /* set bits in IER */
121 #define IER_CLR 0 /* clear bits in IER */
122 #define SR_INT 0x04 /* Shift register full/empty */
123 #define CB2_INT 0x08
124 #define CB1_INT 0x10 /* transition on CB1 input */
125
126 static volatile enum pmu_state {
127 uninitialized = 0,
128 idle,
129 sending,
130 intack,
131 reading,
132 reading_intr,
133 locked,
134 } pmu_state;
135
136 static volatile enum int_data_state {
137 int_data_empty,
138 int_data_fill,
139 int_data_ready,
140 int_data_flush
141 } int_data_state[2] = { int_data_empty, int_data_empty };
142
143 static struct adb_request *current_req;
144 static struct adb_request *last_req;
145 static struct adb_request *req_awaiting_reply;
146 static unsigned char interrupt_data[2][32];
147 static int interrupt_data_len[2];
148 static int int_data_last;
149 static unsigned char *reply_ptr;
150 static int data_index;
151 static int data_len;
152 static volatile int adb_int_pending;
153 static volatile int disable_poll;
154 static int pmu_kind = PMU_UNKNOWN;
155 static int pmu_fully_inited;
156 static int pmu_has_adb;
157 #ifdef CONFIG_PPC_PMAC
158 static volatile unsigned char __iomem *via1;
159 static volatile unsigned char __iomem *via2;
160 static struct device_node *vias;
161 static struct device_node *gpio_node;
162 #endif
163 static unsigned char __iomem *gpio_reg;
164 static int gpio_irq = 0;
165 static int gpio_irq_enabled = -1;
166 static volatile int pmu_suspended;
167 static spinlock_t pmu_lock;
168 static u8 pmu_intr_mask;
169 static int pmu_version;
170 static int drop_interrupts;
171 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
172 static int option_lid_wakeup = 1;
173 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
174 static unsigned long async_req_locks;
175
176 #define NUM_IRQ_STATS 13
177 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
178
179 static struct proc_dir_entry *proc_pmu_root;
180 static struct proc_dir_entry *proc_pmu_info;
181 static struct proc_dir_entry *proc_pmu_irqstats;
182 static struct proc_dir_entry *proc_pmu_options;
183 static int option_server_mode;
184
185 int pmu_battery_count;
186 int pmu_cur_battery;
187 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
188 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
189 static int query_batt_timer = BATTERY_POLLING_COUNT;
190 static struct adb_request batt_req;
191 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
192
193 int __fake_sleep;
194 int asleep;
195
196 #ifdef CONFIG_ADB
197 static int adb_dev_map;
198 static int pmu_adb_flags;
199
200 static int pmu_probe(void);
201 static int pmu_init(void);
202 static int pmu_send_request(struct adb_request *req, int sync);
203 static int pmu_adb_autopoll(int devs);
204 static int pmu_adb_reset_bus(void);
205 #endif /* CONFIG_ADB */
206
207 static int init_pmu(void);
208 static void pmu_start(void);
209 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
210 static irqreturn_t gpio1_interrupt(int irq, void *arg);
211 static int pmu_info_proc_show(struct seq_file *m, void *v);
212 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
213 static int pmu_battery_proc_show(struct seq_file *m, void *v);
214 static void pmu_pass_intr(unsigned char *data, int len);
215 static const struct file_operations pmu_options_proc_fops;
216
217 #ifdef CONFIG_ADB
218 const struct adb_driver via_pmu_driver = {
219 .name = "PMU",
220 .probe = pmu_probe,
221 .init = pmu_init,
222 .send_request = pmu_send_request,
223 .autopoll = pmu_adb_autopoll,
224 .poll = pmu_poll_adb,
225 .reset_bus = pmu_adb_reset_bus,
226 };
227 #endif /* CONFIG_ADB */
228
229 extern void low_sleep_handler(void);
230 extern void enable_kernel_altivec(void);
231 extern void enable_kernel_fp(void);
232
233 #ifdef DEBUG_SLEEP
234 int pmu_polled_request(struct adb_request *req);
235 void pmu_blink(int n);
236 #endif
237
238 /*
239 * This table indicates for each PMU opcode:
240 * - the number of data bytes to be sent with the command, or -1
241 * if a length byte should be sent,
242 * - the number of response bytes which the PMU will return, or
243 * -1 if it will send a length byte.
244 */
245 static const s8 pmu_data_len[256][2] = {
246 /* 0 1 2 3 4 5 6 7 */
247 /*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
248 /*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
249 /*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250 /*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
251 /*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
252 /*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
253 /*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254 /*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
255 /*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256 /*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
257 /*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
258 /*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
259 /*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260 /*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
261 /*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262 /*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
263 /*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
264 /*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
265 /*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266 /*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
267 /*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
268 /*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
269 /*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
270 /*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271 /*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
272 /*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
273 /*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
274 /*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
275 /*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
276 /*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
277 /*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
278 /*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
279 };
280
281 static char *pbook_type[] = {
282 "Unknown PowerBook",
283 "PowerBook 2400/3400/3500(G3)",
284 "PowerBook G3 Series",
285 "1999 PowerBook G3",
286 "Core99"
287 };
288
289 int __init find_via_pmu(void)
290 {
291 #ifdef CONFIG_PPC_PMAC
292 u64 taddr;
293 const u32 *reg;
294
295 if (pmu_state != uninitialized)
296 return 1;
297 vias = of_find_node_by_name(NULL, "via-pmu");
298 if (vias == NULL)
299 return 0;
300
301 reg = of_get_property(vias, "reg", NULL);
302 if (reg == NULL) {
303 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
304 goto fail;
305 }
306 taddr = of_translate_address(vias, reg);
307 if (taddr == OF_BAD_ADDR) {
308 printk(KERN_ERR "via-pmu: Can't translate address !\n");
309 goto fail;
310 }
311
312 spin_lock_init(&pmu_lock);
313
314 pmu_has_adb = 1;
315
316 pmu_intr_mask = PMU_INT_PCEJECT |
317 PMU_INT_SNDBRT |
318 PMU_INT_ADB |
319 PMU_INT_TICK;
320
321 if (of_node_name_eq(vias->parent, "ohare") ||
322 of_device_is_compatible(vias->parent, "ohare"))
323 pmu_kind = PMU_OHARE_BASED;
324 else if (of_device_is_compatible(vias->parent, "paddington"))
325 pmu_kind = PMU_PADDINGTON_BASED;
326 else if (of_device_is_compatible(vias->parent, "heathrow"))
327 pmu_kind = PMU_HEATHROW_BASED;
328 else if (of_device_is_compatible(vias->parent, "Keylargo")
329 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
330 struct device_node *gpiop;
331 struct device_node *adbp;
332 u64 gaddr = OF_BAD_ADDR;
333
334 pmu_kind = PMU_KEYLARGO_BASED;
335 adbp = of_find_node_by_type(NULL, "adb");
336 pmu_has_adb = (adbp != NULL);
337 of_node_put(adbp);
338 pmu_intr_mask = PMU_INT_PCEJECT |
339 PMU_INT_SNDBRT |
340 PMU_INT_ADB |
341 PMU_INT_TICK |
342 PMU_INT_ENVIRONMENT;
343
344 gpiop = of_find_node_by_name(NULL, "gpio");
345 if (gpiop) {
346 reg = of_get_property(gpiop, "reg", NULL);
347 if (reg)
348 gaddr = of_translate_address(gpiop, reg);
349 if (gaddr != OF_BAD_ADDR)
350 gpio_reg = ioremap(gaddr, 0x10);
351 of_node_put(gpiop);
352 }
353 if (gpio_reg == NULL) {
354 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
355 goto fail;
356 }
357 } else
358 pmu_kind = PMU_UNKNOWN;
359
360 via1 = via2 = ioremap(taddr, 0x2000);
361 if (via1 == NULL) {
362 printk(KERN_ERR "via-pmu: Can't map address !\n");
363 goto fail_via_remap;
364 }
365
366 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
367 out_8(&via1[IFR], 0x7f); /* clear IFR */
368
369 pmu_state = idle;
370
371 if (!init_pmu())
372 goto fail_init;
373
374 sys_ctrler = SYS_CTRLER_PMU;
375
376 return 1;
377
378 fail_init:
379 iounmap(via1);
380 via1 = via2 = NULL;
381 fail_via_remap:
382 iounmap(gpio_reg);
383 gpio_reg = NULL;
384 fail:
385 of_node_put(vias);
386 vias = NULL;
387 pmu_state = uninitialized;
388 return 0;
389 #else
390 if (macintosh_config->adb_type != MAC_ADB_PB2)
391 return 0;
392
393 pmu_kind = PMU_UNKNOWN;
394
395 spin_lock_init(&pmu_lock);
396
397 pmu_has_adb = 1;
398
399 pmu_intr_mask = PMU_INT_PCEJECT |
400 PMU_INT_SNDBRT |
401 PMU_INT_ADB |
402 PMU_INT_TICK;
403
404 pmu_state = idle;
405
406 if (!init_pmu()) {
407 pmu_state = uninitialized;
408 return 0;
409 }
410
411 return 1;
412 #endif /* !CONFIG_PPC_PMAC */
413 }
414
415 #ifdef CONFIG_ADB
416 static int pmu_probe(void)
417 {
418 return pmu_state == uninitialized ? -ENODEV : 0;
419 }
420
421 static int pmu_init(void)
422 {
423 return pmu_state == uninitialized ? -ENODEV : 0;
424 }
425 #endif /* CONFIG_ADB */
426
427 /*
428 * We can't wait until pmu_init gets called, that happens too late.
429 * It happens after IDE and SCSI initialization, which can take a few
430 * seconds, and by that time the PMU could have given up on us and
431 * turned us off.
432 * Thus this is called with arch_initcall rather than device_initcall.
433 */
434 static int __init via_pmu_start(void)
435 {
436 unsigned int __maybe_unused irq;
437
438 if (pmu_state == uninitialized)
439 return -ENODEV;
440
441 batt_req.complete = 1;
442
443 #ifdef CONFIG_PPC_PMAC
444 irq = irq_of_parse_and_map(vias, 0);
445 if (!irq) {
446 printk(KERN_ERR "via-pmu: can't map interrupt\n");
447 return -ENODEV;
448 }
449 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
450 * to be disabled between the 2 passes of driver suspend, we
451 * control our own disabling for that one
452 */
453 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
454 "VIA-PMU", (void *)0)) {
455 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
456 return -ENODEV;
457 }
458
459 if (pmu_kind == PMU_KEYLARGO_BASED) {
460 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
461 if (gpio_node == NULL)
462 gpio_node = of_find_node_by_name(NULL,
463 "pmu-interrupt");
464 if (gpio_node)
465 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
466
467 if (gpio_irq) {
468 if (request_irq(gpio_irq, gpio1_interrupt,
469 IRQF_NO_SUSPEND, "GPIO1 ADB",
470 (void *)0))
471 printk(KERN_ERR "pmu: can't get irq %d"
472 " (GPIO1)\n", gpio_irq);
473 else
474 gpio_irq_enabled = 1;
475 }
476 }
477
478 /* Enable interrupts */
479 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
480 #else
481 if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
482 "VIA-PMU-SR", NULL)) {
483 pr_err("%s: couldn't get SR irq\n", __func__);
484 return -ENODEV;
485 }
486 if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
487 "VIA-PMU-CL", NULL)) {
488 pr_err("%s: couldn't get CL irq\n", __func__);
489 free_irq(IRQ_MAC_ADB_SR, NULL);
490 return -ENODEV;
491 }
492 #endif /* !CONFIG_PPC_PMAC */
493
494 pmu_fully_inited = 1;
495
496 /* Make sure PMU settle down before continuing. This is _very_ important
497 * since the IDE probe may shut interrupts down for quite a bit of time. If
498 * a PMU communication is pending while this happens, the PMU may timeout
499 * Not that on Core99 machines, the PMU keeps sending us environement
500 * messages, we should find a way to either fix IDE or make it call
501 * pmu_suspend() before masking interrupts. This can also happens while
502 * scolling with some fbdevs.
503 */
504 do {
505 pmu_poll();
506 } while (pmu_state != idle);
507
508 return 0;
509 }
510
511 arch_initcall(via_pmu_start);
512
513 /*
514 * This has to be done after pci_init, which is a subsys_initcall.
515 */
516 static int __init via_pmu_dev_init(void)
517 {
518 if (pmu_state == uninitialized)
519 return -ENODEV;
520
521 #ifdef CONFIG_PMAC_BACKLIGHT
522 /* Initialize backlight */
523 pmu_backlight_init();
524 #endif
525
526 #ifdef CONFIG_PPC32
527 if (of_machine_is_compatible("AAPL,3400/2400") ||
528 of_machine_is_compatible("AAPL,3500")) {
529 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
530 NULL, PMAC_MB_INFO_MODEL, 0);
531 pmu_battery_count = 1;
532 if (mb == PMAC_TYPE_COMET)
533 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
534 else
535 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
536 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
537 of_machine_is_compatible("PowerBook1,1")) {
538 pmu_battery_count = 2;
539 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
540 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
541 } else {
542 struct device_node* prim =
543 of_find_node_by_name(NULL, "power-mgt");
544 const u32 *prim_info = NULL;
545 if (prim)
546 prim_info = of_get_property(prim, "prim-info", NULL);
547 if (prim_info) {
548 /* Other stuffs here yet unknown */
549 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
550 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
551 if (pmu_battery_count > 1)
552 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
553 }
554 of_node_put(prim);
555 }
556 #endif /* CONFIG_PPC32 */
557
558 /* Create /proc/pmu */
559 proc_pmu_root = proc_mkdir("pmu", NULL);
560 if (proc_pmu_root) {
561 long i;
562
563 for (i=0; i<pmu_battery_count; i++) {
564 char title[16];
565 sprintf(title, "battery_%ld", i);
566 proc_pmu_batt[i] = proc_create_single_data(title, 0,
567 proc_pmu_root, pmu_battery_proc_show,
568 (void *)i);
569 }
570
571 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
572 pmu_info_proc_show);
573 proc_pmu_irqstats = proc_create_single("interrupts", 0,
574 proc_pmu_root, pmu_irqstats_proc_show);
575 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
576 &pmu_options_proc_fops);
577 }
578 return 0;
579 }
580
581 device_initcall(via_pmu_dev_init);
582
583 static int
584 init_pmu(void)
585 {
586 int timeout;
587 struct adb_request req;
588
589 /* Negate TREQ. Set TACK to input and TREQ to output. */
590 out_8(&via2[B], in_8(&via2[B]) | TREQ);
591 out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
592
593 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
594 timeout = 100000;
595 while (!req.complete) {
596 if (--timeout < 0) {
597 printk(KERN_ERR "init_pmu: no response from PMU\n");
598 return 0;
599 }
600 udelay(10);
601 pmu_poll();
602 }
603
604 /* ack all pending interrupts */
605 timeout = 100000;
606 interrupt_data[0][0] = 1;
607 while (interrupt_data[0][0] || pmu_state != idle) {
608 if (--timeout < 0) {
609 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
610 return 0;
611 }
612 if (pmu_state == idle)
613 adb_int_pending = 1;
614 via_pmu_interrupt(0, NULL);
615 udelay(10);
616 }
617
618 /* Tell PMU we are ready. */
619 if (pmu_kind == PMU_KEYLARGO_BASED) {
620 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
621 while (!req.complete)
622 pmu_poll();
623 }
624
625 /* Read PMU version */
626 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
627 pmu_wait_complete(&req);
628 if (req.reply_len > 0)
629 pmu_version = req.reply[0];
630
631 /* Read server mode setting */
632 if (pmu_kind == PMU_KEYLARGO_BASED) {
633 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
634 PMU_PWR_GET_POWERUP_EVENTS);
635 pmu_wait_complete(&req);
636 if (req.reply_len == 2) {
637 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
638 option_server_mode = 1;
639 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
640 option_server_mode ? "enabled" : "disabled");
641 }
642 }
643
644 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
645 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
646
647 return 1;
648 }
649
650 int
651 pmu_get_model(void)
652 {
653 return pmu_kind;
654 }
655
656 static void pmu_set_server_mode(int server_mode)
657 {
658 struct adb_request req;
659
660 if (pmu_kind != PMU_KEYLARGO_BASED)
661 return;
662
663 option_server_mode = server_mode;
664 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
665 pmu_wait_complete(&req);
666 if (req.reply_len < 2)
667 return;
668 if (server_mode)
669 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
670 PMU_PWR_SET_POWERUP_EVENTS,
671 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
672 else
673 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
674 PMU_PWR_CLR_POWERUP_EVENTS,
675 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
676 pmu_wait_complete(&req);
677 }
678
679 /* This new version of the code for 2400/3400/3500 powerbooks
680 * is inspired from the implementation in gkrellm-pmu
681 */
682 static void
683 done_battery_state_ohare(struct adb_request* req)
684 {
685 #ifdef CONFIG_PPC_PMAC
686 /* format:
687 * [0] : flags
688 * 0x01 : AC indicator
689 * 0x02 : charging
690 * 0x04 : battery exist
691 * 0x08 :
692 * 0x10 :
693 * 0x20 : full charged
694 * 0x40 : pcharge reset
695 * 0x80 : battery exist
696 *
697 * [1][2] : battery voltage
698 * [3] : CPU temperature
699 * [4] : battery temperature
700 * [5] : current
701 * [6][7] : pcharge
702 * --tkoba
703 */
704 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
705 long pcharge, charge, vb, vmax, lmax;
706 long vmax_charging, vmax_charged;
707 long amperage, voltage, time, max;
708 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
709 NULL, PMAC_MB_INFO_MODEL, 0);
710
711 if (req->reply[0] & 0x01)
712 pmu_power_flags |= PMU_PWR_AC_PRESENT;
713 else
714 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
715
716 if (mb == PMAC_TYPE_COMET) {
717 vmax_charged = 189;
718 vmax_charging = 213;
719 lmax = 6500;
720 } else {
721 vmax_charged = 330;
722 vmax_charging = 330;
723 lmax = 6500;
724 }
725 vmax = vmax_charged;
726
727 /* If battery installed */
728 if (req->reply[0] & 0x04) {
729 bat_flags |= PMU_BATT_PRESENT;
730 if (req->reply[0] & 0x02)
731 bat_flags |= PMU_BATT_CHARGING;
732 vb = (req->reply[1] << 8) | req->reply[2];
733 voltage = (vb * 265 + 72665) / 10;
734 amperage = req->reply[5];
735 if ((req->reply[0] & 0x01) == 0) {
736 if (amperage > 200)
737 vb += ((amperage - 200) * 15)/100;
738 } else if (req->reply[0] & 0x02) {
739 vb = (vb * 97) / 100;
740 vmax = vmax_charging;
741 }
742 charge = (100 * vb) / vmax;
743 if (req->reply[0] & 0x40) {
744 pcharge = (req->reply[6] << 8) + req->reply[7];
745 if (pcharge > lmax)
746 pcharge = lmax;
747 pcharge *= 100;
748 pcharge = 100 - pcharge / lmax;
749 if (pcharge < charge)
750 charge = pcharge;
751 }
752 if (amperage > 0)
753 time = (charge * 16440) / amperage;
754 else
755 time = 0;
756 max = 100;
757 amperage = -amperage;
758 } else
759 charge = max = amperage = voltage = time = 0;
760
761 pmu_batteries[pmu_cur_battery].flags = bat_flags;
762 pmu_batteries[pmu_cur_battery].charge = charge;
763 pmu_batteries[pmu_cur_battery].max_charge = max;
764 pmu_batteries[pmu_cur_battery].amperage = amperage;
765 pmu_batteries[pmu_cur_battery].voltage = voltage;
766 pmu_batteries[pmu_cur_battery].time_remaining = time;
767 #endif /* CONFIG_PPC_PMAC */
768
769 clear_bit(0, &async_req_locks);
770 }
771
772 static void
773 done_battery_state_smart(struct adb_request* req)
774 {
775 /* format:
776 * [0] : format of this structure (known: 3,4,5)
777 * [1] : flags
778 *
779 * format 3 & 4:
780 *
781 * [2] : charge
782 * [3] : max charge
783 * [4] : current
784 * [5] : voltage
785 *
786 * format 5:
787 *
788 * [2][3] : charge
789 * [4][5] : max charge
790 * [6][7] : current
791 * [8][9] : voltage
792 */
793
794 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
795 int amperage;
796 unsigned int capa, max, voltage;
797
798 if (req->reply[1] & 0x01)
799 pmu_power_flags |= PMU_PWR_AC_PRESENT;
800 else
801 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
802
803
804 capa = max = amperage = voltage = 0;
805
806 if (req->reply[1] & 0x04) {
807 bat_flags |= PMU_BATT_PRESENT;
808 switch(req->reply[0]) {
809 case 3:
810 case 4: capa = req->reply[2];
811 max = req->reply[3];
812 amperage = *((signed char *)&req->reply[4]);
813 voltage = req->reply[5];
814 break;
815 case 5: capa = (req->reply[2] << 8) | req->reply[3];
816 max = (req->reply[4] << 8) | req->reply[5];
817 amperage = *((signed short *)&req->reply[6]);
818 voltage = (req->reply[8] << 8) | req->reply[9];
819 break;
820 default:
821 pr_warn("pmu.c: unrecognized battery info, "
822 "len: %d, %4ph\n", req->reply_len,
823 req->reply);
824 break;
825 }
826 }
827
828 if ((req->reply[1] & 0x01) && (amperage > 0))
829 bat_flags |= PMU_BATT_CHARGING;
830
831 pmu_batteries[pmu_cur_battery].flags = bat_flags;
832 pmu_batteries[pmu_cur_battery].charge = capa;
833 pmu_batteries[pmu_cur_battery].max_charge = max;
834 pmu_batteries[pmu_cur_battery].amperage = amperage;
835 pmu_batteries[pmu_cur_battery].voltage = voltage;
836 if (amperage) {
837 if ((req->reply[1] & 0x01) && (amperage > 0))
838 pmu_batteries[pmu_cur_battery].time_remaining
839 = ((max-capa) * 3600) / amperage;
840 else
841 pmu_batteries[pmu_cur_battery].time_remaining
842 = (capa * 3600) / (-amperage);
843 } else
844 pmu_batteries[pmu_cur_battery].time_remaining = 0;
845
846 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
847
848 clear_bit(0, &async_req_locks);
849 }
850
851 static void
852 query_battery_state(void)
853 {
854 if (test_and_set_bit(0, &async_req_locks))
855 return;
856 if (pmu_kind == PMU_OHARE_BASED)
857 pmu_request(&batt_req, done_battery_state_ohare,
858 1, PMU_BATTERY_STATE);
859 else
860 pmu_request(&batt_req, done_battery_state_smart,
861 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
862 }
863
864 static int pmu_info_proc_show(struct seq_file *m, void *v)
865 {
866 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
867 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
868 seq_printf(m, "AC Power : %d\n",
869 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
870 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
871
872 return 0;
873 }
874
875 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
876 {
877 int i;
878 static const char *irq_names[NUM_IRQ_STATS] = {
879 "Unknown interrupt (type 0)",
880 "Unknown interrupt (type 1)",
881 "PC-Card eject button",
882 "Sound/Brightness button",
883 "ADB message",
884 "Battery state change",
885 "Environment interrupt",
886 "Tick timer",
887 "Ghost interrupt (zero len)",
888 "Empty interrupt (empty mask)",
889 "Max irqs in a row",
890 "Total CB1 triggered events",
891 "Total GPIO1 triggered events",
892 };
893
894 for (i = 0; i < NUM_IRQ_STATS; i++) {
895 seq_printf(m, " %2u: %10u (%s)\n",
896 i, pmu_irq_stats[i], irq_names[i]);
897 }
898 return 0;
899 }
900
901 static int pmu_battery_proc_show(struct seq_file *m, void *v)
902 {
903 long batnum = (long)m->private;
904
905 seq_putc(m, '\n');
906 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
907 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
908 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
909 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
910 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
911 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
912 return 0;
913 }
914
915 static int pmu_options_proc_show(struct seq_file *m, void *v)
916 {
917 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
918 if (pmu_kind == PMU_KEYLARGO_BASED &&
919 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
920 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
921 #endif
922 if (pmu_kind == PMU_KEYLARGO_BASED)
923 seq_printf(m, "server_mode=%d\n", option_server_mode);
924
925 return 0;
926 }
927
928 static int pmu_options_proc_open(struct inode *inode, struct file *file)
929 {
930 return single_open(file, pmu_options_proc_show, NULL);
931 }
932
933 static ssize_t pmu_options_proc_write(struct file *file,
934 const char __user *buffer, size_t count, loff_t *pos)
935 {
936 char tmp[33];
937 char *label, *val;
938 size_t fcount = count;
939
940 if (!count)
941 return -EINVAL;
942 if (count > 32)
943 count = 32;
944 if (copy_from_user(tmp, buffer, count))
945 return -EFAULT;
946 tmp[count] = 0;
947
948 label = tmp;
949 while(*label == ' ')
950 label++;
951 val = label;
952 while(*val && (*val != '=')) {
953 if (*val == ' ')
954 *val = 0;
955 val++;
956 }
957 if ((*val) == 0)
958 return -EINVAL;
959 *(val++) = 0;
960 while(*val == ' ')
961 val++;
962 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
963 if (pmu_kind == PMU_KEYLARGO_BASED &&
964 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
965 if (!strcmp(label, "lid_wakeup"))
966 option_lid_wakeup = ((*val) == '1');
967 #endif
968 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
969 int new_value;
970 new_value = ((*val) == '1');
971 if (new_value != option_server_mode)
972 pmu_set_server_mode(new_value);
973 }
974 return fcount;
975 }
976
977 static const struct file_operations pmu_options_proc_fops = {
978 .owner = THIS_MODULE,
979 .open = pmu_options_proc_open,
980 .read = seq_read,
981 .llseek = seq_lseek,
982 .release = single_release,
983 .write = pmu_options_proc_write,
984 };
985
986 #ifdef CONFIG_ADB
987 /* Send an ADB command */
988 static int pmu_send_request(struct adb_request *req, int sync)
989 {
990 int i, ret;
991
992 if (pmu_state == uninitialized || !pmu_fully_inited) {
993 req->complete = 1;
994 return -ENXIO;
995 }
996
997 ret = -EINVAL;
998
999 switch (req->data[0]) {
1000 case PMU_PACKET:
1001 for (i = 0; i < req->nbytes - 1; ++i)
1002 req->data[i] = req->data[i+1];
1003 --req->nbytes;
1004 if (pmu_data_len[req->data[0]][1] != 0) {
1005 req->reply[0] = ADB_RET_OK;
1006 req->reply_len = 1;
1007 } else
1008 req->reply_len = 0;
1009 ret = pmu_queue_request(req);
1010 break;
1011 case CUDA_PACKET:
1012 switch (req->data[1]) {
1013 case CUDA_GET_TIME:
1014 if (req->nbytes != 2)
1015 break;
1016 req->data[0] = PMU_READ_RTC;
1017 req->nbytes = 1;
1018 req->reply_len = 3;
1019 req->reply[0] = CUDA_PACKET;
1020 req->reply[1] = 0;
1021 req->reply[2] = CUDA_GET_TIME;
1022 ret = pmu_queue_request(req);
1023 break;
1024 case CUDA_SET_TIME:
1025 if (req->nbytes != 6)
1026 break;
1027 req->data[0] = PMU_SET_RTC;
1028 req->nbytes = 5;
1029 for (i = 1; i <= 4; ++i)
1030 req->data[i] = req->data[i+1];
1031 req->reply_len = 3;
1032 req->reply[0] = CUDA_PACKET;
1033 req->reply[1] = 0;
1034 req->reply[2] = CUDA_SET_TIME;
1035 ret = pmu_queue_request(req);
1036 break;
1037 }
1038 break;
1039 case ADB_PACKET:
1040 if (!pmu_has_adb)
1041 return -ENXIO;
1042 for (i = req->nbytes - 1; i > 1; --i)
1043 req->data[i+2] = req->data[i];
1044 req->data[3] = req->nbytes - 2;
1045 req->data[2] = pmu_adb_flags;
1046 /*req->data[1] = req->data[1];*/
1047 req->data[0] = PMU_ADB_CMD;
1048 req->nbytes += 2;
1049 req->reply_expected = 1;
1050 req->reply_len = 0;
1051 ret = pmu_queue_request(req);
1052 break;
1053 }
1054 if (ret) {
1055 req->complete = 1;
1056 return ret;
1057 }
1058
1059 if (sync)
1060 while (!req->complete)
1061 pmu_poll();
1062
1063 return 0;
1064 }
1065
1066 /* Enable/disable autopolling */
1067 static int __pmu_adb_autopoll(int devs)
1068 {
1069 struct adb_request req;
1070
1071 if (devs) {
1072 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1073 adb_dev_map >> 8, adb_dev_map);
1074 pmu_adb_flags = 2;
1075 } else {
1076 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1077 pmu_adb_flags = 0;
1078 }
1079 while (!req.complete)
1080 pmu_poll();
1081 return 0;
1082 }
1083
1084 static int pmu_adb_autopoll(int devs)
1085 {
1086 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1087 return -ENXIO;
1088
1089 adb_dev_map = devs;
1090 return __pmu_adb_autopoll(devs);
1091 }
1092
1093 /* Reset the ADB bus */
1094 static int pmu_adb_reset_bus(void)
1095 {
1096 struct adb_request req;
1097 int save_autopoll = adb_dev_map;
1098
1099 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1100 return -ENXIO;
1101
1102 /* anyone got a better idea?? */
1103 __pmu_adb_autopoll(0);
1104
1105 req.nbytes = 4;
1106 req.done = NULL;
1107 req.data[0] = PMU_ADB_CMD;
1108 req.data[1] = ADB_BUSRESET;
1109 req.data[2] = 0;
1110 req.data[3] = 0;
1111 req.data[4] = 0;
1112 req.reply_len = 0;
1113 req.reply_expected = 1;
1114 if (pmu_queue_request(&req) != 0) {
1115 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1116 return -EIO;
1117 }
1118 pmu_wait_complete(&req);
1119
1120 if (save_autopoll != 0)
1121 __pmu_adb_autopoll(save_autopoll);
1122
1123 return 0;
1124 }
1125 #endif /* CONFIG_ADB */
1126
1127 /* Construct and send a pmu request */
1128 int
1129 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1130 int nbytes, ...)
1131 {
1132 va_list list;
1133 int i;
1134
1135 if (pmu_state == uninitialized)
1136 return -ENXIO;
1137
1138 if (nbytes < 0 || nbytes > 32) {
1139 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1140 req->complete = 1;
1141 return -EINVAL;
1142 }
1143 req->nbytes = nbytes;
1144 req->done = done;
1145 va_start(list, nbytes);
1146 for (i = 0; i < nbytes; ++i)
1147 req->data[i] = va_arg(list, int);
1148 va_end(list);
1149 req->reply_len = 0;
1150 req->reply_expected = 0;
1151 return pmu_queue_request(req);
1152 }
1153
1154 int
1155 pmu_queue_request(struct adb_request *req)
1156 {
1157 unsigned long flags;
1158 int nsend;
1159
1160 if (pmu_state == uninitialized) {
1161 req->complete = 1;
1162 return -ENXIO;
1163 }
1164 if (req->nbytes <= 0) {
1165 req->complete = 1;
1166 return 0;
1167 }
1168 nsend = pmu_data_len[req->data[0]][0];
1169 if (nsend >= 0 && req->nbytes != nsend + 1) {
1170 req->complete = 1;
1171 return -EINVAL;
1172 }
1173
1174 req->next = NULL;
1175 req->sent = 0;
1176 req->complete = 0;
1177
1178 spin_lock_irqsave(&pmu_lock, flags);
1179 if (current_req) {
1180 last_req->next = req;
1181 last_req = req;
1182 } else {
1183 current_req = req;
1184 last_req = req;
1185 if (pmu_state == idle)
1186 pmu_start();
1187 }
1188 spin_unlock_irqrestore(&pmu_lock, flags);
1189
1190 return 0;
1191 }
1192
1193 static inline void
1194 wait_for_ack(void)
1195 {
1196 /* Sightly increased the delay, I had one occurrence of the message
1197 * reported
1198 */
1199 int timeout = 4000;
1200 while ((in_8(&via2[B]) & TACK) == 0) {
1201 if (--timeout < 0) {
1202 printk(KERN_ERR "PMU not responding (!ack)\n");
1203 return;
1204 }
1205 udelay(10);
1206 }
1207 }
1208
1209 /* New PMU seems to be very sensitive to those timings, so we make sure
1210 * PCI is flushed immediately */
1211 static inline void
1212 send_byte(int x)
1213 {
1214 out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1215 out_8(&via1[SR], x);
1216 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */
1217 (void)in_8(&via2[B]);
1218 }
1219
1220 static inline void
1221 recv_byte(void)
1222 {
1223 out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1224 in_8(&via1[SR]); /* resets SR */
1225 out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1226 (void)in_8(&via2[B]);
1227 }
1228
1229 static inline void
1230 pmu_done(struct adb_request *req)
1231 {
1232 void (*done)(struct adb_request *) = req->done;
1233 mb();
1234 req->complete = 1;
1235 /* Here, we assume that if the request has a done member, the
1236 * struct request will survive to setting req->complete to 1
1237 */
1238 if (done)
1239 (*done)(req);
1240 }
1241
1242 static void
1243 pmu_start(void)
1244 {
1245 struct adb_request *req;
1246
1247 /* assert pmu_state == idle */
1248 /* get the packet to send */
1249 req = current_req;
1250 if (!req || pmu_state != idle
1251 || (/*req->reply_expected && */req_awaiting_reply))
1252 return;
1253
1254 pmu_state = sending;
1255 data_index = 1;
1256 data_len = pmu_data_len[req->data[0]][0];
1257
1258 /* Sounds safer to make sure ACK is high before writing. This helped
1259 * kill a problem with ADB and some iBooks
1260 */
1261 wait_for_ack();
1262 /* set the shift register to shift out and send a byte */
1263 send_byte(req->data[0]);
1264 }
1265
1266 void
1267 pmu_poll(void)
1268 {
1269 if (pmu_state == uninitialized)
1270 return;
1271 if (disable_poll)
1272 return;
1273 via_pmu_interrupt(0, NULL);
1274 }
1275
1276 void
1277 pmu_poll_adb(void)
1278 {
1279 if (pmu_state == uninitialized)
1280 return;
1281 if (disable_poll)
1282 return;
1283 /* Kicks ADB read when PMU is suspended */
1284 adb_int_pending = 1;
1285 do {
1286 via_pmu_interrupt(0, NULL);
1287 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1288 || req_awaiting_reply));
1289 }
1290
1291 void
1292 pmu_wait_complete(struct adb_request *req)
1293 {
1294 if (pmu_state == uninitialized)
1295 return;
1296 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1297 via_pmu_interrupt(0, NULL);
1298 }
1299
1300 /* This function loops until the PMU is idle and prevents it from
1301 * anwsering to ADB interrupts. pmu_request can still be called.
1302 * This is done to avoid spurrious shutdowns when we know we'll have
1303 * interrupts switched off for a long time
1304 */
1305 void
1306 pmu_suspend(void)
1307 {
1308 unsigned long flags;
1309
1310 if (pmu_state == uninitialized)
1311 return;
1312
1313 spin_lock_irqsave(&pmu_lock, flags);
1314 pmu_suspended++;
1315 if (pmu_suspended > 1) {
1316 spin_unlock_irqrestore(&pmu_lock, flags);
1317 return;
1318 }
1319
1320 do {
1321 spin_unlock_irqrestore(&pmu_lock, flags);
1322 if (req_awaiting_reply)
1323 adb_int_pending = 1;
1324 via_pmu_interrupt(0, NULL);
1325 spin_lock_irqsave(&pmu_lock, flags);
1326 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1327 if (gpio_irq >= 0)
1328 disable_irq_nosync(gpio_irq);
1329 out_8(&via1[IER], CB1_INT | IER_CLR);
1330 spin_unlock_irqrestore(&pmu_lock, flags);
1331 break;
1332 }
1333 } while (1);
1334 }
1335
1336 void
1337 pmu_resume(void)
1338 {
1339 unsigned long flags;
1340
1341 if (pmu_state == uninitialized || pmu_suspended < 1)
1342 return;
1343
1344 spin_lock_irqsave(&pmu_lock, flags);
1345 pmu_suspended--;
1346 if (pmu_suspended > 0) {
1347 spin_unlock_irqrestore(&pmu_lock, flags);
1348 return;
1349 }
1350 adb_int_pending = 1;
1351 if (gpio_irq >= 0)
1352 enable_irq(gpio_irq);
1353 out_8(&via1[IER], CB1_INT | IER_SET);
1354 spin_unlock_irqrestore(&pmu_lock, flags);
1355 pmu_poll();
1356 }
1357
1358 /* Interrupt data could be the result data from an ADB cmd */
1359 static void
1360 pmu_handle_data(unsigned char *data, int len)
1361 {
1362 unsigned char ints;
1363 int idx;
1364 int i = 0;
1365
1366 asleep = 0;
1367 if (drop_interrupts || len < 1) {
1368 adb_int_pending = 0;
1369 pmu_irq_stats[8]++;
1370 return;
1371 }
1372
1373 /* Get PMU interrupt mask */
1374 ints = data[0];
1375
1376 /* Record zero interrupts for stats */
1377 if (ints == 0)
1378 pmu_irq_stats[9]++;
1379
1380 /* Hack to deal with ADB autopoll flag */
1381 if (ints & PMU_INT_ADB)
1382 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1383
1384 next:
1385 if (ints == 0) {
1386 if (i > pmu_irq_stats[10])
1387 pmu_irq_stats[10] = i;
1388 return;
1389 }
1390 i++;
1391
1392 idx = ffs(ints) - 1;
1393 ints &= ~BIT(idx);
1394
1395 pmu_irq_stats[idx]++;
1396
1397 /* Note: for some reason, we get an interrupt with len=1,
1398 * data[0]==0 after each normal ADB interrupt, at least
1399 * on the Pismo. Still investigating... --BenH
1400 */
1401 switch (BIT(idx)) {
1402 case PMU_INT_ADB:
1403 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1404 struct adb_request *req = req_awaiting_reply;
1405 if (!req) {
1406 printk(KERN_ERR "PMU: extra ADB reply\n");
1407 return;
1408 }
1409 req_awaiting_reply = NULL;
1410 if (len <= 2)
1411 req->reply_len = 0;
1412 else {
1413 memcpy(req->reply, data + 1, len - 1);
1414 req->reply_len = len - 1;
1415 }
1416 pmu_done(req);
1417 } else {
1418 #ifdef CONFIG_XMON
1419 if (len == 4 && data[1] == 0x2c) {
1420 extern int xmon_wants_key, xmon_adb_keycode;
1421 if (xmon_wants_key) {
1422 xmon_adb_keycode = data[2];
1423 return;
1424 }
1425 }
1426 #endif /* CONFIG_XMON */
1427 #ifdef CONFIG_ADB
1428 /*
1429 * XXX On the [23]400 the PMU gives us an up
1430 * event for keycodes 0x74 or 0x75 when the PC
1431 * card eject buttons are released, so we
1432 * ignore those events.
1433 */
1434 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1435 && data[1] == 0x2c && data[3] == 0xff
1436 && (data[2] & ~1) == 0xf4))
1437 adb_input(data+1, len-1, 1);
1438 #endif /* CONFIG_ADB */
1439 }
1440 break;
1441
1442 /* Sound/brightness button pressed */
1443 case PMU_INT_SNDBRT:
1444 #ifdef CONFIG_PMAC_BACKLIGHT
1445 if (len == 3)
1446 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1447 #endif
1448 break;
1449
1450 /* Tick interrupt */
1451 case PMU_INT_TICK:
1452 /* Environment or tick interrupt, query batteries */
1453 if (pmu_battery_count) {
1454 if ((--query_batt_timer) == 0) {
1455 query_battery_state();
1456 query_batt_timer = BATTERY_POLLING_COUNT;
1457 }
1458 }
1459 break;
1460
1461 case PMU_INT_ENVIRONMENT:
1462 if (pmu_battery_count)
1463 query_battery_state();
1464 pmu_pass_intr(data, len);
1465 /* len == 6 is probably a bad check. But how do I
1466 * know what PMU versions send what events here? */
1467 if (len == 6) {
1468 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1469 via_pmu_event(PMU_EVT_LID, data[1]&1);
1470 }
1471 break;
1472
1473 default:
1474 pmu_pass_intr(data, len);
1475 }
1476 goto next;
1477 }
1478
1479 static struct adb_request*
1480 pmu_sr_intr(void)
1481 {
1482 struct adb_request *req;
1483 int bite = 0;
1484
1485 if (in_8(&via2[B]) & TREQ) {
1486 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1487 return NULL;
1488 }
1489 /* The ack may not yet be low when we get the interrupt */
1490 while ((in_8(&via2[B]) & TACK) != 0)
1491 ;
1492
1493 /* if reading grab the byte, and reset the interrupt */
1494 if (pmu_state == reading || pmu_state == reading_intr)
1495 bite = in_8(&via1[SR]);
1496
1497 /* reset TREQ and wait for TACK to go high */
1498 out_8(&via2[B], in_8(&via2[B]) | TREQ);
1499 wait_for_ack();
1500
1501 switch (pmu_state) {
1502 case sending:
1503 req = current_req;
1504 if (data_len < 0) {
1505 data_len = req->nbytes - 1;
1506 send_byte(data_len);
1507 break;
1508 }
1509 if (data_index <= data_len) {
1510 send_byte(req->data[data_index++]);
1511 break;
1512 }
1513 req->sent = 1;
1514 data_len = pmu_data_len[req->data[0]][1];
1515 if (data_len == 0) {
1516 pmu_state = idle;
1517 current_req = req->next;
1518 if (req->reply_expected)
1519 req_awaiting_reply = req;
1520 else
1521 return req;
1522 } else {
1523 pmu_state = reading;
1524 data_index = 0;
1525 reply_ptr = req->reply + req->reply_len;
1526 recv_byte();
1527 }
1528 break;
1529
1530 case intack:
1531 data_index = 0;
1532 data_len = -1;
1533 pmu_state = reading_intr;
1534 reply_ptr = interrupt_data[int_data_last];
1535 recv_byte();
1536 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1537 enable_irq(gpio_irq);
1538 gpio_irq_enabled = 1;
1539 }
1540 break;
1541
1542 case reading:
1543 case reading_intr:
1544 if (data_len == -1) {
1545 data_len = bite;
1546 if (bite > 32)
1547 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1548 } else if (data_index < 32) {
1549 reply_ptr[data_index++] = bite;
1550 }
1551 if (data_index < data_len) {
1552 recv_byte();
1553 break;
1554 }
1555
1556 if (pmu_state == reading_intr) {
1557 pmu_state = idle;
1558 int_data_state[int_data_last] = int_data_ready;
1559 interrupt_data_len[int_data_last] = data_len;
1560 } else {
1561 req = current_req;
1562 /*
1563 * For PMU sleep and freq change requests, we lock the
1564 * PMU until it's explicitly unlocked. This avoids any
1565 * spurrious event polling getting in
1566 */
1567 current_req = req->next;
1568 req->reply_len += data_index;
1569 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1570 pmu_state = locked;
1571 else
1572 pmu_state = idle;
1573 return req;
1574 }
1575 break;
1576
1577 default:
1578 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1579 pmu_state);
1580 }
1581 return NULL;
1582 }
1583
1584 static irqreturn_t
1585 via_pmu_interrupt(int irq, void *arg)
1586 {
1587 unsigned long flags;
1588 int intr;
1589 int nloop = 0;
1590 int int_data = -1;
1591 struct adb_request *req = NULL;
1592 int handled = 0;
1593
1594 /* This is a bit brutal, we can probably do better */
1595 spin_lock_irqsave(&pmu_lock, flags);
1596 ++disable_poll;
1597
1598 for (;;) {
1599 /* On 68k Macs, VIA interrupts are dispatched individually.
1600 * Unless we are polling, the relevant IRQ flag has already
1601 * been cleared.
1602 */
1603 intr = 0;
1604 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1605 intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1606 out_8(&via1[IFR], intr);
1607 }
1608 #ifndef CONFIG_PPC_PMAC
1609 switch (irq) {
1610 case IRQ_MAC_ADB_CL:
1611 intr = CB1_INT;
1612 break;
1613 case IRQ_MAC_ADB_SR:
1614 intr = SR_INT;
1615 break;
1616 }
1617 #endif
1618 if (intr == 0)
1619 break;
1620 handled = 1;
1621 if (++nloop > 1000) {
1622 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1623 "intr=%x, ier=%x pmu_state=%d\n",
1624 intr, in_8(&via1[IER]), pmu_state);
1625 break;
1626 }
1627 if (intr & CB1_INT) {
1628 adb_int_pending = 1;
1629 pmu_irq_stats[11]++;
1630 }
1631 if (intr & SR_INT) {
1632 req = pmu_sr_intr();
1633 if (req)
1634 break;
1635 }
1636 #ifndef CONFIG_PPC_PMAC
1637 break;
1638 #endif
1639 }
1640
1641 recheck:
1642 if (pmu_state == idle) {
1643 if (adb_int_pending) {
1644 if (int_data_state[0] == int_data_empty)
1645 int_data_last = 0;
1646 else if (int_data_state[1] == int_data_empty)
1647 int_data_last = 1;
1648 else
1649 goto no_free_slot;
1650 pmu_state = intack;
1651 int_data_state[int_data_last] = int_data_fill;
1652 /* Sounds safer to make sure ACK is high before writing.
1653 * This helped kill a problem with ADB and some iBooks
1654 */
1655 wait_for_ack();
1656 send_byte(PMU_INT_ACK);
1657 adb_int_pending = 0;
1658 } else if (current_req)
1659 pmu_start();
1660 }
1661 no_free_slot:
1662 /* Mark the oldest buffer for flushing */
1663 if (int_data_state[!int_data_last] == int_data_ready) {
1664 int_data_state[!int_data_last] = int_data_flush;
1665 int_data = !int_data_last;
1666 } else if (int_data_state[int_data_last] == int_data_ready) {
1667 int_data_state[int_data_last] = int_data_flush;
1668 int_data = int_data_last;
1669 }
1670 --disable_poll;
1671 spin_unlock_irqrestore(&pmu_lock, flags);
1672
1673 /* Deal with completed PMU requests outside of the lock */
1674 if (req) {
1675 pmu_done(req);
1676 req = NULL;
1677 }
1678
1679 /* Deal with interrupt datas outside of the lock */
1680 if (int_data >= 0) {
1681 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1682 spin_lock_irqsave(&pmu_lock, flags);
1683 ++disable_poll;
1684 int_data_state[int_data] = int_data_empty;
1685 int_data = -1;
1686 goto recheck;
1687 }
1688
1689 return IRQ_RETVAL(handled);
1690 }
1691
1692 void
1693 pmu_unlock(void)
1694 {
1695 unsigned long flags;
1696
1697 spin_lock_irqsave(&pmu_lock, flags);
1698 if (pmu_state == locked)
1699 pmu_state = idle;
1700 adb_int_pending = 1;
1701 spin_unlock_irqrestore(&pmu_lock, flags);
1702 }
1703
1704
1705 static __maybe_unused irqreturn_t
1706 gpio1_interrupt(int irq, void *arg)
1707 {
1708 unsigned long flags;
1709
1710 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1711 spin_lock_irqsave(&pmu_lock, flags);
1712 if (gpio_irq_enabled > 0) {
1713 disable_irq_nosync(gpio_irq);
1714 gpio_irq_enabled = 0;
1715 }
1716 pmu_irq_stats[12]++;
1717 adb_int_pending = 1;
1718 spin_unlock_irqrestore(&pmu_lock, flags);
1719 via_pmu_interrupt(0, NULL);
1720 return IRQ_HANDLED;
1721 }
1722 return IRQ_NONE;
1723 }
1724
1725 void
1726 pmu_enable_irled(int on)
1727 {
1728 struct adb_request req;
1729
1730 if (pmu_state == uninitialized)
1731 return ;
1732 if (pmu_kind == PMU_KEYLARGO_BASED)
1733 return ;
1734
1735 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1736 (on ? PMU_POW_ON : PMU_POW_OFF));
1737 pmu_wait_complete(&req);
1738 }
1739
1740 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1741 #define RTC_OFFSET 2082844800
1742
1743 time64_t pmu_get_time(void)
1744 {
1745 struct adb_request req;
1746 u32 now;
1747
1748 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1749 return 0;
1750 pmu_wait_complete(&req);
1751 if (req.reply_len != 4)
1752 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1753 now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1754 (req.reply[2] << 8) + req.reply[3];
1755 return (time64_t)now - RTC_OFFSET;
1756 }
1757
1758 int pmu_set_rtc_time(struct rtc_time *tm)
1759 {
1760 u32 now;
1761 struct adb_request req;
1762
1763 now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1764 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1765 now >> 24, now >> 16, now >> 8, now) < 0)
1766 return -ENXIO;
1767 pmu_wait_complete(&req);
1768 if (req.reply_len != 0)
1769 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1770 return 0;
1771 }
1772
1773 void
1774 pmu_restart(void)
1775 {
1776 struct adb_request req;
1777
1778 if (pmu_state == uninitialized)
1779 return;
1780
1781 local_irq_disable();
1782
1783 drop_interrupts = 1;
1784
1785 if (pmu_kind != PMU_KEYLARGO_BASED) {
1786 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1787 PMU_INT_TICK );
1788 while(!req.complete)
1789 pmu_poll();
1790 }
1791
1792 pmu_request(&req, NULL, 1, PMU_RESET);
1793 pmu_wait_complete(&req);
1794 for (;;)
1795 ;
1796 }
1797
1798 void
1799 pmu_shutdown(void)
1800 {
1801 struct adb_request req;
1802
1803 if (pmu_state == uninitialized)
1804 return;
1805
1806 local_irq_disable();
1807
1808 drop_interrupts = 1;
1809
1810 if (pmu_kind != PMU_KEYLARGO_BASED) {
1811 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1812 PMU_INT_TICK );
1813 pmu_wait_complete(&req);
1814 } else {
1815 /* Disable server mode on shutdown or we'll just
1816 * wake up again
1817 */
1818 pmu_set_server_mode(0);
1819 }
1820
1821 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1822 'M', 'A', 'T', 'T');
1823 pmu_wait_complete(&req);
1824 for (;;)
1825 ;
1826 }
1827
1828 int
1829 pmu_present(void)
1830 {
1831 return pmu_state != uninitialized;
1832 }
1833
1834 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1835 /*
1836 * Put the powerbook to sleep.
1837 */
1838
1839 static u32 save_via[8];
1840
1841 static void
1842 save_via_state(void)
1843 {
1844 save_via[0] = in_8(&via1[ANH]);
1845 save_via[1] = in_8(&via1[DIRA]);
1846 save_via[2] = in_8(&via1[B]);
1847 save_via[3] = in_8(&via1[DIRB]);
1848 save_via[4] = in_8(&via1[PCR]);
1849 save_via[5] = in_8(&via1[ACR]);
1850 save_via[6] = in_8(&via1[T1CL]);
1851 save_via[7] = in_8(&via1[T1CH]);
1852 }
1853 static void
1854 restore_via_state(void)
1855 {
1856 out_8(&via1[ANH], save_via[0]);
1857 out_8(&via1[DIRA], save_via[1]);
1858 out_8(&via1[B], save_via[2]);
1859 out_8(&via1[DIRB], save_via[3]);
1860 out_8(&via1[PCR], save_via[4]);
1861 out_8(&via1[ACR], save_via[5]);
1862 out_8(&via1[T1CL], save_via[6]);
1863 out_8(&via1[T1CH], save_via[7]);
1864 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
1865 out_8(&via1[IFR], 0x7f); /* clear IFR */
1866 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1867 }
1868
1869 #define GRACKLE_PM (1<<7)
1870 #define GRACKLE_DOZE (1<<5)
1871 #define GRACKLE_NAP (1<<4)
1872 #define GRACKLE_SLEEP (1<<3)
1873
1874 static int powerbook_sleep_grackle(void)
1875 {
1876 unsigned long save_l2cr;
1877 unsigned short pmcr1;
1878 struct adb_request req;
1879 struct pci_dev *grackle;
1880
1881 grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1882 if (!grackle)
1883 return -ENODEV;
1884
1885 /* Turn off various things. Darwin does some retry tests here... */
1886 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1887 pmu_wait_complete(&req);
1888 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1889 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1890 pmu_wait_complete(&req);
1891
1892 /* For 750, save backside cache setting and disable it */
1893 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1894
1895 if (!__fake_sleep) {
1896 /* Ask the PMU to put us to sleep */
1897 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1898 pmu_wait_complete(&req);
1899 }
1900
1901 /* The VIA is supposed not to be restored correctly*/
1902 save_via_state();
1903 /* We shut down some HW */
1904 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1905
1906 pci_read_config_word(grackle, 0x70, &pmcr1);
1907 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1908 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1909 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1910 pci_write_config_word(grackle, 0x70, pmcr1);
1911
1912 /* Call low-level ASM sleep handler */
1913 if (__fake_sleep)
1914 mdelay(5000);
1915 else
1916 low_sleep_handler();
1917
1918 /* We're awake again, stop grackle PM */
1919 pci_read_config_word(grackle, 0x70, &pmcr1);
1920 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1921 pci_write_config_word(grackle, 0x70, pmcr1);
1922
1923 pci_dev_put(grackle);
1924
1925 /* Make sure the PMU is idle */
1926 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1927 restore_via_state();
1928
1929 /* Restore L2 cache */
1930 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1931 _set_L2CR(save_l2cr);
1932
1933 /* Restore userland MMU context */
1934 switch_mmu_context(NULL, current->active_mm, NULL);
1935
1936 /* Power things up */
1937 pmu_unlock();
1938 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1939 pmu_wait_complete(&req);
1940 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1941 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1942 pmu_wait_complete(&req);
1943 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1944 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1945 pmu_wait_complete(&req);
1946
1947 return 0;
1948 }
1949
1950 static int
1951 powerbook_sleep_Core99(void)
1952 {
1953 unsigned long save_l2cr;
1954 unsigned long save_l3cr;
1955 struct adb_request req;
1956
1957 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1958 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1959 return -ENOSYS;
1960 }
1961
1962 if (num_online_cpus() > 1 || cpu_is_offline(0))
1963 return -EAGAIN;
1964
1965 /* Stop environment and ADB interrupts */
1966 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1967 pmu_wait_complete(&req);
1968
1969 /* Tell PMU what events will wake us up */
1970 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1971 0xff, 0xff);
1972 pmu_wait_complete(&req);
1973 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1974 0, PMU_PWR_WAKEUP_KEY |
1975 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1976 pmu_wait_complete(&req);
1977
1978 /* Save the state of the L2 and L3 caches */
1979 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1980 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1981
1982 if (!__fake_sleep) {
1983 /* Ask the PMU to put us to sleep */
1984 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1985 pmu_wait_complete(&req);
1986 }
1987
1988 /* The VIA is supposed not to be restored correctly*/
1989 save_via_state();
1990
1991 /* Shut down various ASICs. There's a chance that we can no longer
1992 * talk to the PMU after this, so I moved it to _after_ sending the
1993 * sleep command to it. Still need to be checked.
1994 */
1995 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1996
1997 /* Call low-level ASM sleep handler */
1998 if (__fake_sleep)
1999 mdelay(5000);
2000 else
2001 low_sleep_handler();
2002
2003 /* Restore Apple core ASICs state */
2004 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2005
2006 /* Restore VIA */
2007 restore_via_state();
2008
2009 /* tweak LPJ before cpufreq is there */
2010 loops_per_jiffy *= 2;
2011
2012 /* Restore video */
2013 pmac_call_early_video_resume();
2014
2015 /* Restore L2 cache */
2016 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2017 _set_L2CR(save_l2cr);
2018 /* Restore L3 cache */
2019 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2020 _set_L3CR(save_l3cr);
2021
2022 /* Restore userland MMU context */
2023 switch_mmu_context(NULL, current->active_mm, NULL);
2024
2025 /* Tell PMU we are ready */
2026 pmu_unlock();
2027 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2028 pmu_wait_complete(&req);
2029 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2030 pmu_wait_complete(&req);
2031
2032 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2033 loops_per_jiffy /= 2;
2034
2035 return 0;
2036 }
2037
2038 #define PB3400_MEM_CTRL 0xf8000000
2039 #define PB3400_MEM_CTRL_SLEEP 0x70
2040
2041 static void __iomem *pb3400_mem_ctrl;
2042
2043 static void powerbook_sleep_init_3400(void)
2044 {
2045 /* map in the memory controller registers */
2046 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2047 if (pb3400_mem_ctrl == NULL)
2048 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2049 }
2050
2051 static int powerbook_sleep_3400(void)
2052 {
2053 int i, x;
2054 unsigned int hid0;
2055 unsigned long msr;
2056 struct adb_request sleep_req;
2057 unsigned int __iomem *mem_ctrl_sleep;
2058
2059 if (pb3400_mem_ctrl == NULL)
2060 return -ENOMEM;
2061 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2062
2063 /* Set the memory controller to keep the memory refreshed
2064 while we're asleep */
2065 for (i = 0x403f; i >= 0x4000; --i) {
2066 out_be32(mem_ctrl_sleep, i);
2067 do {
2068 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2069 } while (x == 0);
2070 if (x >= 0x100)
2071 break;
2072 }
2073
2074 /* Ask the PMU to put us to sleep */
2075 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2076 pmu_wait_complete(&sleep_req);
2077 pmu_unlock();
2078
2079 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2080
2081 asleep = 1;
2082
2083 /* Put the CPU into sleep mode */
2084 hid0 = mfspr(SPRN_HID0);
2085 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2086 mtspr(SPRN_HID0, hid0);
2087 local_irq_enable();
2088 msr = mfmsr() | MSR_POW;
2089 while (asleep) {
2090 mb();
2091 mtmsr(msr);
2092 isync();
2093 }
2094 local_irq_disable();
2095
2096 /* OK, we're awake again, start restoring things */
2097 out_be32(mem_ctrl_sleep, 0x3f);
2098 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2099
2100 return 0;
2101 }
2102
2103 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2104
2105 /*
2106 * Support for /dev/pmu device
2107 */
2108 #define RB_SIZE 0x10
2109 struct pmu_private {
2110 struct list_head list;
2111 int rb_get;
2112 int rb_put;
2113 struct rb_entry {
2114 unsigned short len;
2115 unsigned char data[16];
2116 } rb_buf[RB_SIZE];
2117 wait_queue_head_t wait;
2118 spinlock_t lock;
2119 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2120 int backlight_locker;
2121 #endif
2122 };
2123
2124 static LIST_HEAD(all_pmu_pvt);
2125 static DEFINE_SPINLOCK(all_pvt_lock);
2126
2127 static void
2128 pmu_pass_intr(unsigned char *data, int len)
2129 {
2130 struct pmu_private *pp;
2131 struct list_head *list;
2132 int i;
2133 unsigned long flags;
2134
2135 if (len > sizeof(pp->rb_buf[0].data))
2136 len = sizeof(pp->rb_buf[0].data);
2137 spin_lock_irqsave(&all_pvt_lock, flags);
2138 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2139 pp = list_entry(list, struct pmu_private, list);
2140 spin_lock(&pp->lock);
2141 i = pp->rb_put + 1;
2142 if (i >= RB_SIZE)
2143 i = 0;
2144 if (i != pp->rb_get) {
2145 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2146 rp->len = len;
2147 memcpy(rp->data, data, len);
2148 pp->rb_put = i;
2149 wake_up_interruptible(&pp->wait);
2150 }
2151 spin_unlock(&pp->lock);
2152 }
2153 spin_unlock_irqrestore(&all_pvt_lock, flags);
2154 }
2155
2156 static int
2157 pmu_open(struct inode *inode, struct file *file)
2158 {
2159 struct pmu_private *pp;
2160 unsigned long flags;
2161
2162 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2163 if (!pp)
2164 return -ENOMEM;
2165 pp->rb_get = pp->rb_put = 0;
2166 spin_lock_init(&pp->lock);
2167 init_waitqueue_head(&pp->wait);
2168 mutex_lock(&pmu_info_proc_mutex);
2169 spin_lock_irqsave(&all_pvt_lock, flags);
2170 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2171 pp->backlight_locker = 0;
2172 #endif
2173 list_add(&pp->list, &all_pmu_pvt);
2174 spin_unlock_irqrestore(&all_pvt_lock, flags);
2175 file->private_data = pp;
2176 mutex_unlock(&pmu_info_proc_mutex);
2177 return 0;
2178 }
2179
2180 static ssize_t
2181 pmu_read(struct file *file, char __user *buf,
2182 size_t count, loff_t *ppos)
2183 {
2184 struct pmu_private *pp = file->private_data;
2185 DECLARE_WAITQUEUE(wait, current);
2186 unsigned long flags;
2187 int ret = 0;
2188
2189 if (count < 1 || !pp)
2190 return -EINVAL;
2191 if (!access_ok(buf, count))
2192 return -EFAULT;
2193
2194 spin_lock_irqsave(&pp->lock, flags);
2195 add_wait_queue(&pp->wait, &wait);
2196 set_current_state(TASK_INTERRUPTIBLE);
2197
2198 for (;;) {
2199 ret = -EAGAIN;
2200 if (pp->rb_get != pp->rb_put) {
2201 int i = pp->rb_get;
2202 struct rb_entry *rp = &pp->rb_buf[i];
2203 ret = rp->len;
2204 spin_unlock_irqrestore(&pp->lock, flags);
2205 if (ret > count)
2206 ret = count;
2207 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2208 ret = -EFAULT;
2209 if (++i >= RB_SIZE)
2210 i = 0;
2211 spin_lock_irqsave(&pp->lock, flags);
2212 pp->rb_get = i;
2213 }
2214 if (ret >= 0)
2215 break;
2216 if (file->f_flags & O_NONBLOCK)
2217 break;
2218 ret = -ERESTARTSYS;
2219 if (signal_pending(current))
2220 break;
2221 spin_unlock_irqrestore(&pp->lock, flags);
2222 schedule();
2223 spin_lock_irqsave(&pp->lock, flags);
2224 }
2225 __set_current_state(TASK_RUNNING);
2226 remove_wait_queue(&pp->wait, &wait);
2227 spin_unlock_irqrestore(&pp->lock, flags);
2228
2229 return ret;
2230 }
2231
2232 static ssize_t
2233 pmu_write(struct file *file, const char __user *buf,
2234 size_t count, loff_t *ppos)
2235 {
2236 return 0;
2237 }
2238
2239 static __poll_t
2240 pmu_fpoll(struct file *filp, poll_table *wait)
2241 {
2242 struct pmu_private *pp = filp->private_data;
2243 __poll_t mask = 0;
2244 unsigned long flags;
2245
2246 if (!pp)
2247 return 0;
2248 poll_wait(filp, &pp->wait, wait);
2249 spin_lock_irqsave(&pp->lock, flags);
2250 if (pp->rb_get != pp->rb_put)
2251 mask |= EPOLLIN;
2252 spin_unlock_irqrestore(&pp->lock, flags);
2253 return mask;
2254 }
2255
2256 static int
2257 pmu_release(struct inode *inode, struct file *file)
2258 {
2259 struct pmu_private *pp = file->private_data;
2260 unsigned long flags;
2261
2262 if (pp) {
2263 file->private_data = NULL;
2264 spin_lock_irqsave(&all_pvt_lock, flags);
2265 list_del(&pp->list);
2266 spin_unlock_irqrestore(&all_pvt_lock, flags);
2267
2268 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2269 if (pp->backlight_locker)
2270 pmac_backlight_enable();
2271 #endif
2272
2273 kfree(pp);
2274 }
2275 return 0;
2276 }
2277
2278 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2279 static void pmac_suspend_disable_irqs(void)
2280 {
2281 /* Call platform functions marked "on sleep" */
2282 pmac_pfunc_i2c_suspend();
2283 pmac_pfunc_base_suspend();
2284 }
2285
2286 static int powerbook_sleep(suspend_state_t state)
2287 {
2288 int error = 0;
2289
2290 /* Wait for completion of async requests */
2291 while (!batt_req.complete)
2292 pmu_poll();
2293
2294 /* Giveup the lazy FPU & vec so we don't have to back them
2295 * up from the low level code
2296 */
2297 enable_kernel_fp();
2298
2299 #ifdef CONFIG_ALTIVEC
2300 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2301 enable_kernel_altivec();
2302 #endif /* CONFIG_ALTIVEC */
2303
2304 switch (pmu_kind) {
2305 case PMU_OHARE_BASED:
2306 error = powerbook_sleep_3400();
2307 break;
2308 case PMU_HEATHROW_BASED:
2309 case PMU_PADDINGTON_BASED:
2310 error = powerbook_sleep_grackle();
2311 break;
2312 case PMU_KEYLARGO_BASED:
2313 error = powerbook_sleep_Core99();
2314 break;
2315 default:
2316 return -ENOSYS;
2317 }
2318
2319 if (error)
2320 return error;
2321
2322 mdelay(100);
2323
2324 return 0;
2325 }
2326
2327 static void pmac_suspend_enable_irqs(void)
2328 {
2329 /* Force a poll of ADB interrupts */
2330 adb_int_pending = 1;
2331 via_pmu_interrupt(0, NULL);
2332
2333 mdelay(10);
2334
2335 /* Call platform functions marked "on wake" */
2336 pmac_pfunc_base_resume();
2337 pmac_pfunc_i2c_resume();
2338 }
2339
2340 static int pmu_sleep_valid(suspend_state_t state)
2341 {
2342 return state == PM_SUSPEND_MEM
2343 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2344 }
2345
2346 static const struct platform_suspend_ops pmu_pm_ops = {
2347 .enter = powerbook_sleep,
2348 .valid = pmu_sleep_valid,
2349 };
2350
2351 static int register_pmu_pm_ops(void)
2352 {
2353 if (pmu_kind == PMU_OHARE_BASED)
2354 powerbook_sleep_init_3400();
2355 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2356 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2357 suspend_set_ops(&pmu_pm_ops);
2358
2359 return 0;
2360 }
2361
2362 device_initcall(register_pmu_pm_ops);
2363 #endif
2364
2365 static int pmu_ioctl(struct file *filp,
2366 u_int cmd, u_long arg)
2367 {
2368 __u32 __user *argp = (__u32 __user *)arg;
2369 int error = -EINVAL;
2370
2371 switch (cmd) {
2372 #ifdef CONFIG_PPC_PMAC
2373 case PMU_IOC_SLEEP:
2374 if (!capable(CAP_SYS_ADMIN))
2375 return -EACCES;
2376 return pm_suspend(PM_SUSPEND_MEM);
2377 case PMU_IOC_CAN_SLEEP:
2378 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2379 return put_user(0, argp);
2380 else
2381 return put_user(1, argp);
2382 #endif
2383
2384 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2385 /* Compatibility ioctl's for backlight */
2386 case PMU_IOC_GET_BACKLIGHT:
2387 {
2388 int brightness;
2389
2390 brightness = pmac_backlight_get_legacy_brightness();
2391 if (brightness < 0)
2392 return brightness;
2393 else
2394 return put_user(brightness, argp);
2395
2396 }
2397 case PMU_IOC_SET_BACKLIGHT:
2398 {
2399 int brightness;
2400
2401 error = get_user(brightness, argp);
2402 if (error)
2403 return error;
2404
2405 return pmac_backlight_set_legacy_brightness(brightness);
2406 }
2407 #ifdef CONFIG_INPUT_ADBHID
2408 case PMU_IOC_GRAB_BACKLIGHT: {
2409 struct pmu_private *pp = filp->private_data;
2410
2411 if (pp->backlight_locker)
2412 return 0;
2413
2414 pp->backlight_locker = 1;
2415 pmac_backlight_disable();
2416
2417 return 0;
2418 }
2419 #endif /* CONFIG_INPUT_ADBHID */
2420 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2421
2422 case PMU_IOC_GET_MODEL:
2423 return put_user(pmu_kind, argp);
2424 case PMU_IOC_HAS_ADB:
2425 return put_user(pmu_has_adb, argp);
2426 }
2427 return error;
2428 }
2429
2430 static long pmu_unlocked_ioctl(struct file *filp,
2431 u_int cmd, u_long arg)
2432 {
2433 int ret;
2434
2435 mutex_lock(&pmu_info_proc_mutex);
2436 ret = pmu_ioctl(filp, cmd, arg);
2437 mutex_unlock(&pmu_info_proc_mutex);
2438
2439 return ret;
2440 }
2441
2442 #ifdef CONFIG_COMPAT
2443 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2444 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2445 #define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2446 #define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2447 #define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2448 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2449
2450 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2451 {
2452 switch (cmd) {
2453 case PMU_IOC_SLEEP:
2454 break;
2455 case PMU_IOC_GET_BACKLIGHT32:
2456 cmd = PMU_IOC_GET_BACKLIGHT;
2457 break;
2458 case PMU_IOC_SET_BACKLIGHT32:
2459 cmd = PMU_IOC_SET_BACKLIGHT;
2460 break;
2461 case PMU_IOC_GET_MODEL32:
2462 cmd = PMU_IOC_GET_MODEL;
2463 break;
2464 case PMU_IOC_HAS_ADB32:
2465 cmd = PMU_IOC_HAS_ADB;
2466 break;
2467 case PMU_IOC_CAN_SLEEP32:
2468 cmd = PMU_IOC_CAN_SLEEP;
2469 break;
2470 case PMU_IOC_GRAB_BACKLIGHT32:
2471 cmd = PMU_IOC_GRAB_BACKLIGHT;
2472 break;
2473 default:
2474 return -ENOIOCTLCMD;
2475 }
2476 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2477 }
2478 #endif
2479
2480 static const struct file_operations pmu_device_fops = {
2481 .read = pmu_read,
2482 .write = pmu_write,
2483 .poll = pmu_fpoll,
2484 .unlocked_ioctl = pmu_unlocked_ioctl,
2485 #ifdef CONFIG_COMPAT
2486 .compat_ioctl = compat_pmu_ioctl,
2487 #endif
2488 .open = pmu_open,
2489 .release = pmu_release,
2490 .llseek = noop_llseek,
2491 };
2492
2493 static struct miscdevice pmu_device = {
2494 PMU_MINOR, "pmu", &pmu_device_fops
2495 };
2496
2497 static int pmu_device_init(void)
2498 {
2499 if (pmu_state == uninitialized)
2500 return 0;
2501 if (misc_register(&pmu_device) < 0)
2502 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2503 return 0;
2504 }
2505 device_initcall(pmu_device_init);
2506
2507
2508 #ifdef DEBUG_SLEEP
2509 static inline void
2510 polled_handshake(void)
2511 {
2512 via2[B] &= ~TREQ; eieio();
2513 while ((via2[B] & TACK) != 0)
2514 ;
2515 via2[B] |= TREQ; eieio();
2516 while ((via2[B] & TACK) == 0)
2517 ;
2518 }
2519
2520 static inline void
2521 polled_send_byte(int x)
2522 {
2523 via1[ACR] |= SR_OUT | SR_EXT; eieio();
2524 via1[SR] = x; eieio();
2525 polled_handshake();
2526 }
2527
2528 static inline int
2529 polled_recv_byte(void)
2530 {
2531 int x;
2532
2533 via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2534 x = via1[SR]; eieio();
2535 polled_handshake();
2536 x = via1[SR]; eieio();
2537 return x;
2538 }
2539
2540 int
2541 pmu_polled_request(struct adb_request *req)
2542 {
2543 unsigned long flags;
2544 int i, l, c;
2545
2546 req->complete = 1;
2547 c = req->data[0];
2548 l = pmu_data_len[c][0];
2549 if (l >= 0 && req->nbytes != l + 1)
2550 return -EINVAL;
2551
2552 local_irq_save(flags);
2553 while (pmu_state != idle)
2554 pmu_poll();
2555
2556 while ((via2[B] & TACK) == 0)
2557 ;
2558 polled_send_byte(c);
2559 if (l < 0) {
2560 l = req->nbytes - 1;
2561 polled_send_byte(l);
2562 }
2563 for (i = 1; i <= l; ++i)
2564 polled_send_byte(req->data[i]);
2565
2566 l = pmu_data_len[c][1];
2567 if (l < 0)
2568 l = polled_recv_byte();
2569 for (i = 0; i < l; ++i)
2570 req->reply[i + req->reply_len] = polled_recv_byte();
2571
2572 if (req->done)
2573 (*req->done)(req);
2574
2575 local_irq_restore(flags);
2576 return 0;
2577 }
2578
2579 /* N.B. This doesn't work on the 3400 */
2580 void pmu_blink(int n)
2581 {
2582 struct adb_request req;
2583
2584 memset(&req, 0, sizeof(req));
2585
2586 for (; n > 0; --n) {
2587 req.nbytes = 4;
2588 req.done = NULL;
2589 req.data[0] = 0xee;
2590 req.data[1] = 4;
2591 req.data[2] = 0;
2592 req.data[3] = 1;
2593 req.reply[0] = ADB_RET_OK;
2594 req.reply_len = 1;
2595 req.reply_expected = 0;
2596 pmu_polled_request(&req);
2597 mdelay(50);
2598 req.nbytes = 4;
2599 req.done = NULL;
2600 req.data[0] = 0xee;
2601 req.data[1] = 4;
2602 req.data[2] = 0;
2603 req.data[3] = 0;
2604 req.reply[0] = ADB_RET_OK;
2605 req.reply_len = 1;
2606 req.reply_expected = 0;
2607 pmu_polled_request(&req);
2608 mdelay(50);
2609 }
2610 mdelay(50);
2611 }
2612 #endif /* DEBUG_SLEEP */
2613
2614 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2615 int pmu_sys_suspended;
2616
2617 static int pmu_syscore_suspend(void)
2618 {
2619 /* Suspend PMU event interrupts */
2620 pmu_suspend();
2621 pmu_sys_suspended = 1;
2622
2623 #ifdef CONFIG_PMAC_BACKLIGHT
2624 /* Tell backlight code not to muck around with the chip anymore */
2625 pmu_backlight_set_sleep(1);
2626 #endif
2627
2628 return 0;
2629 }
2630
2631 static void pmu_syscore_resume(void)
2632 {
2633 struct adb_request req;
2634
2635 if (!pmu_sys_suspended)
2636 return;
2637
2638 /* Tell PMU we are ready */
2639 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2640 pmu_wait_complete(&req);
2641
2642 #ifdef CONFIG_PMAC_BACKLIGHT
2643 /* Tell backlight code it can use the chip again */
2644 pmu_backlight_set_sleep(0);
2645 #endif
2646 /* Resume PMU event interrupts */
2647 pmu_resume();
2648 pmu_sys_suspended = 0;
2649 }
2650
2651 static struct syscore_ops pmu_syscore_ops = {
2652 .suspend = pmu_syscore_suspend,
2653 .resume = pmu_syscore_resume,
2654 };
2655
2656 static int pmu_syscore_register(void)
2657 {
2658 register_syscore_ops(&pmu_syscore_ops);
2659
2660 return 0;
2661 }
2662 subsys_initcall(pmu_syscore_register);
2663 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2664
2665 EXPORT_SYMBOL(pmu_request);
2666 EXPORT_SYMBOL(pmu_queue_request);
2667 EXPORT_SYMBOL(pmu_poll);
2668 EXPORT_SYMBOL(pmu_poll_adb);
2669 EXPORT_SYMBOL(pmu_wait_complete);
2670 EXPORT_SYMBOL(pmu_suspend);
2671 EXPORT_SYMBOL(pmu_resume);
2672 EXPORT_SYMBOL(pmu_unlock);
2673 #if defined(CONFIG_PPC32)
2674 EXPORT_SYMBOL(pmu_enable_irled);
2675 EXPORT_SYMBOL(pmu_battery_count);
2676 EXPORT_SYMBOL(pmu_batteries);
2677 EXPORT_SYMBOL(pmu_power_flags);
2678 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2679
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