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