Gitiles
Code Review Sign In
192.168.1.100 / T800 / b04a402ae4328aad41335d93cebd3484973ab7c2 / . / src / kernel / linux / v4.19 / drivers / macintosh / via-pmu.c
blob: d72c450aebe5c3aa79bf8322d93507aef8ad990c [file] [log] [blame]
xjb04a4022021-11-25 15:01:52 +0800[diff] [blame^]1// SPDX-License-Identifier: GPL-2.0
2/*
3 * Device driver for the PMU in Apple PowerBooks and PowerMacs.
4 *
5 * The VIA (versatile interface adapter) interfaces to the PMU,
6 * a 6805 microprocessor core whose primary function is to control
7 * battery charging and system power on the PowerBook 3400 and 2400.
8 * The PMU also controls the ADB (Apple Desktop Bus) which connects
9 * to the keyboard and mouse, as well as the non-volatile RAM
10 * and the RTC (real time clock) chip.
11 *
12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
14 * Copyright (C) 2006-2007 Johannes Berg
15 *
16 * THIS DRIVER IS BECOMING A TOTAL MESS !
17 * - Cleanup atomically disabling reply to PMU events after
18 * a sleep or a freq. switch
19 *
20 */
21#include <stdarg.h>
22#include <linux/mutex.h>
23#include <linux/types.h>
24#include <linux/errno.h>
25#include <linux/kernel.h>
26#include <linux/delay.h>
27#include <linux/sched/signal.h>
28#include <linux/miscdevice.h>
29#include <linux/blkdev.h>
30#include <linux/pci.h>
31#include <linux/slab.h>
32#include <linux/poll.h>
33#include <linux/adb.h>
34#include <linux/pmu.h>
35#include <linux/cuda.h>
36#include <linux/module.h>
37#include <linux/spinlock.h>
38#include <linux/pm.h>
39#include <linux/proc_fs.h>
40#include <linux/seq_file.h>
41#include <linux/init.h>
42#include <linux/interrupt.h>
43#include <linux/device.h>
44#include <linux/syscore_ops.h>
45#include <linux/freezer.h>
46#include <linux/syscalls.h>
47#include <linux/suspend.h>
48#include <linux/cpu.h>
49#include <linux/compat.h>
50#include <linux/of_address.h>
51#include <linux/of_irq.h>
52#include <linux/uaccess.h>
53#include <asm/machdep.h>
54#include <asm/io.h>
55#include <asm/pgtable.h>
56#include <asm/sections.h>
57#include <asm/irq.h>
58#ifdef CONFIG_PPC_PMAC
59#include <asm/pmac_feature.h>
60#include <asm/pmac_pfunc.h>
61#include <asm/pmac_low_i2c.h>
62#include <asm/prom.h>
63#include <asm/mmu_context.h>
64#include <asm/cputable.h>
65#include <asm/time.h>
66#include <asm/backlight.h>
67#else
68#include <asm/macintosh.h>
69#include <asm/macints.h>
70#include <asm/mac_via.h>
71#endif
72
73#include "via-pmu-event.h"
74
75/* Some compile options */
76#undef DEBUG_SLEEP
77
78/* Misc minor number allocated for /dev/pmu */
79#define PMU_MINOR 154
80
81/* How many iterations between battery polls */
82#define BATTERY_POLLING_COUNT 2
83
84static DEFINE_MUTEX(pmu_info_proc_mutex);
85
86/* VIA registers - spaced 0x200 bytes apart */
87#define RS 0x200 /* skip between registers */
88#define B 0 /* B-side data */
89#define A RS /* A-side data */
90#define DIRB (2*RS) /* B-side direction (1=output) */
91#define DIRA (3*RS) /* A-side direction (1=output) */
92#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
93#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
94#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
95#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
96#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
97#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
98#define SR (10*RS) /* Shift register */
99#define ACR (11*RS) /* Auxiliary control register */
100#define PCR (12*RS) /* Peripheral control register */
101#define IFR (13*RS) /* Interrupt flag register */
102#define IER (14*RS) /* Interrupt enable register */
103#define ANH (15*RS) /* A-side data, no handshake */
104
105/* Bits in B data register: both active low */
106#ifdef CONFIG_PPC_PMAC
107#define TACK 0x08 /* Transfer acknowledge (input) */
108#define TREQ 0x10 /* Transfer request (output) */
109#else
110#define TACK 0x02
111#define TREQ 0x04
112#endif
113
114/* Bits in ACR */
115#define SR_CTRL 0x1c /* Shift register control bits */
116#define SR_EXT 0x0c /* Shift on external clock */
117#define SR_OUT 0x10 /* Shift out if 1 */
118
119/* Bits in IFR and IER */
120#define IER_SET 0x80 /* set bits in IER */
121#define IER_CLR 0 /* clear bits in IER */
122#define SR_INT 0x04 /* Shift register full/empty */
123#define CB2_INT 0x08
124#define CB1_INT 0x10 /* transition on CB1 input */
125
126static volatile enum pmu_state {
127 uninitialized = 0,
128 idle,
129 sending,
130 intack,
131 reading,
132 reading_intr,
133 locked,
134} pmu_state;
135
136static volatile enum int_data_state {
137 int_data_empty,
138 int_data_fill,
139 int_data_ready,
140 int_data_flush
141} int_data_state[2] = { int_data_empty, int_data_empty };
142
143static struct adb_request *current_req;
144static struct adb_request *last_req;
145static struct adb_request *req_awaiting_reply;
146static unsigned char interrupt_data[2][32];
147static int interrupt_data_len[2];
148static int int_data_last;
149static unsigned char *reply_ptr;
150static int data_index;
151static int data_len;
152static volatile int adb_int_pending;
153static volatile int disable_poll;
154static int pmu_kind = PMU_UNKNOWN;
155static int pmu_fully_inited;
156static int pmu_has_adb;
157#ifdef CONFIG_PPC_PMAC
158static volatile unsigned char __iomem *via1;
159static volatile unsigned char __iomem *via2;
160static struct device_node *vias;
161static struct device_node *gpio_node;
162#endif
163static unsigned char __iomem *gpio_reg;
164static int gpio_irq = 0;
165static int gpio_irq_enabled = -1;
166static volatile int pmu_suspended;
167static spinlock_t pmu_lock;
168static u8 pmu_intr_mask;
169static int pmu_version;
170static int drop_interrupts;
171#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
172static int option_lid_wakeup = 1;
173#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
174static unsigned long async_req_locks;
175
176#define NUM_IRQ_STATS 13
177static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
178
179static struct proc_dir_entry *proc_pmu_root;
180static struct proc_dir_entry *proc_pmu_info;
181static struct proc_dir_entry *proc_pmu_irqstats;
182static struct proc_dir_entry *proc_pmu_options;
183static int option_server_mode;
184
185int pmu_battery_count;
186int pmu_cur_battery;
187unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
188struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
189static int query_batt_timer = BATTERY_POLLING_COUNT;
190static struct adb_request batt_req;
191static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
192
193int __fake_sleep;
194int asleep;
195
196#ifdef CONFIG_ADB
197static int adb_dev_map;
198static int pmu_adb_flags;
199
200static int pmu_probe(void);
201static int pmu_init(void);
202static int pmu_send_request(struct adb_request *req, int sync);
203static int pmu_adb_autopoll(int devs);
204static int pmu_adb_reset_bus(void);
205#endif /* CONFIG_ADB */
206
207static int init_pmu(void);
208static void pmu_start(void);
209static irqreturn_t via_pmu_interrupt(int irq, void *arg);
210static irqreturn_t gpio1_interrupt(int irq, void *arg);
211static int pmu_info_proc_show(struct seq_file *m, void *v);
212static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
213static int pmu_battery_proc_show(struct seq_file *m, void *v);
214static void pmu_pass_intr(unsigned char *data, int len);
215static const struct file_operations pmu_options_proc_fops;
216
217#ifdef CONFIG_ADB
218const struct adb_driver via_pmu_driver = {
219 .name = "PMU",
220 .probe = pmu_probe,
221 .init = pmu_init,
222 .send_request = pmu_send_request,
223 .autopoll = pmu_adb_autopoll,
224 .poll = pmu_poll_adb,
225 .reset_bus = pmu_adb_reset_bus,
226};
227#endif /* CONFIG_ADB */
228
229extern void low_sleep_handler(void);
230extern void enable_kernel_altivec(void);
231extern void enable_kernel_fp(void);
232
233#ifdef DEBUG_SLEEP
234int pmu_polled_request(struct adb_request *req);
235void pmu_blink(int n);
236#endif
237
238/*
239 * This table indicates for each PMU opcode:
240 * - the number of data bytes to be sent with the command, or -1
241 * if a length byte should be sent,
242 * - the number of response bytes which the PMU will return, or
243 * -1 if it will send a length byte.
244 */
245static const s8 pmu_data_len[256][2] = {
246/* 0 1 2 3 4 5 6 7 */
247/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
248/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
249/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
250/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
251/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
252/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
253/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
254/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
255/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
256/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
257/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
258/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
259/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
260/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
261/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
262/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
263/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
264/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
265/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
266/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
267/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
268/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
269/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
270/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
271/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
272/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
273/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
274/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
275/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
276/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
277/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
278/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
279};
280
281static char *pbook_type[] = {
282 "Unknown PowerBook",
283 "PowerBook 2400/3400/3500(G3)",
284 "PowerBook G3 Series",
285 "1999 PowerBook G3",
286 "Core99"
287};
288
289int __init find_via_pmu(void)
290{
291#ifdef CONFIG_PPC_PMAC
292 u64 taddr;
293 const u32 *reg;
294
295 if (pmu_state != uninitialized)
296 return 1;
297 vias = of_find_node_by_name(NULL, "via-pmu");
298 if (vias == NULL)
299 return 0;
300
301 reg = of_get_property(vias, "reg", NULL);
302 if (reg == NULL) {
303 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
304 goto fail;
305 }
306 taddr = of_translate_address(vias, reg);
307 if (taddr == OF_BAD_ADDR) {
308 printk(KERN_ERR "via-pmu: Can't translate address !\n");
309 goto fail;
310 }
311
312 spin_lock_init(&pmu_lock);
313
314 pmu_has_adb = 1;
315
316 pmu_intr_mask = PMU_INT_PCEJECT |
317 PMU_INT_SNDBRT |
318 PMU_INT_ADB |
319 PMU_INT_TICK;
320
321 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
322 || of_device_is_compatible(vias->parent, "ohare")))
323 pmu_kind = PMU_OHARE_BASED;
324 else if (of_device_is_compatible(vias->parent, "paddington"))
325 pmu_kind = PMU_PADDINGTON_BASED;
326 else if (of_device_is_compatible(vias->parent, "heathrow"))
327 pmu_kind = PMU_HEATHROW_BASED;
328 else if (of_device_is_compatible(vias->parent, "Keylargo")
329 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
330 struct device_node *gpiop;
331 struct device_node *adbp;
332 u64 gaddr = OF_BAD_ADDR;
333
334 pmu_kind = PMU_KEYLARGO_BASED;
335 adbp = of_find_node_by_type(NULL, "adb");
336 pmu_has_adb = (adbp != NULL);
337 of_node_put(adbp);
338 pmu_intr_mask = PMU_INT_PCEJECT |
339 PMU_INT_SNDBRT |
340 PMU_INT_ADB |
341 PMU_INT_TICK |
342 PMU_INT_ENVIRONMENT;
343
344 gpiop = of_find_node_by_name(NULL, "gpio");
345 if (gpiop) {
346 reg = of_get_property(gpiop, "reg", NULL);
347 if (reg)
348 gaddr = of_translate_address(gpiop, reg);
349 if (gaddr != OF_BAD_ADDR)
350 gpio_reg = ioremap(gaddr, 0x10);
351 of_node_put(gpiop);
352 }
353 if (gpio_reg == NULL) {
354 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
355 goto fail;
356 }
357 } else
358 pmu_kind = PMU_UNKNOWN;
359
360 via1 = via2 = ioremap(taddr, 0x2000);
361 if (via1 == NULL) {
362 printk(KERN_ERR "via-pmu: Can't map address !\n");
363 goto fail_via_remap;
364 }
365
366 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
367 out_8(&via1[IFR], 0x7f); /* clear IFR */
368
369 pmu_state = idle;
370
371 if (!init_pmu())
372 goto fail_init;
373
374 sys_ctrler = SYS_CTRLER_PMU;
375
376 return 1;
377
378 fail_init:
379 iounmap(via1);
380 via1 = via2 = NULL;
381 fail_via_remap:
382 iounmap(gpio_reg);
383 gpio_reg = NULL;
384 fail:
385 of_node_put(vias);
386 vias = NULL;
387 pmu_state = uninitialized;
388 return 0;
389#else
390 if (macintosh_config->adb_type != MAC_ADB_PB2)
391 return 0;
392
393 pmu_kind = PMU_UNKNOWN;
394
395 spin_lock_init(&pmu_lock);
396
397 pmu_has_adb = 1;
398
399 pmu_intr_mask = PMU_INT_PCEJECT |
400 PMU_INT_SNDBRT |
401 PMU_INT_ADB |
402 PMU_INT_TICK;
403
404 pmu_state = idle;
405
406 if (!init_pmu()) {
407 pmu_state = uninitialized;
408 return 0;
409 }
410
411 return 1;
412#endif /* !CONFIG_PPC_PMAC */
413}
414
415#ifdef CONFIG_ADB
416static int pmu_probe(void)
417{
418 return pmu_state == uninitialized ? -ENODEV : 0;
419}
420
421static int pmu_init(void)
422{
423 return pmu_state == uninitialized ? -ENODEV : 0;
424}
425#endif /* CONFIG_ADB */
426
427/*
428 * We can't wait until pmu_init gets called, that happens too late.
429 * It happens after IDE and SCSI initialization, which can take a few
430 * seconds, and by that time the PMU could have given up on us and
431 * turned us off.
432 * Thus this is called with arch_initcall rather than device_initcall.
433 */
434static int __init via_pmu_start(void)
435{
436 unsigned int __maybe_unused irq;
437
438 if (pmu_state == uninitialized)
439 return -ENODEV;
440
441 batt_req.complete = 1;
442
443#ifdef CONFIG_PPC_PMAC
444 irq = irq_of_parse_and_map(vias, 0);
445 if (!irq) {
446 printk(KERN_ERR "via-pmu: can't map interrupt\n");
447 return -ENODEV;
448 }
449 /* We set IRQF_NO_SUSPEND because we don't want the interrupt
450 * to be disabled between the 2 passes of driver suspend, we
451 * control our own disabling for that one
452 */
453 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
454 "VIA-PMU", (void *)0)) {
455 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
456 return -ENODEV;
457 }
458
459 if (pmu_kind == PMU_KEYLARGO_BASED) {
460 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
461 if (gpio_node == NULL)
462 gpio_node = of_find_node_by_name(NULL,
463 "pmu-interrupt");
464 if (gpio_node)
465 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
466
467 if (gpio_irq) {
468 if (request_irq(gpio_irq, gpio1_interrupt,
469 IRQF_NO_SUSPEND, "GPIO1 ADB",
470 (void *)0))
471 printk(KERN_ERR "pmu: can't get irq %d"
472 " (GPIO1)\n", gpio_irq);
473 else
474 gpio_irq_enabled = 1;
475 }
476 }
477
478 /* Enable interrupts */
479 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
480#else
481 if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
482 "VIA-PMU-SR", NULL)) {
483 pr_err("%s: couldn't get SR irq\n", __func__);
484 return -ENODEV;
485 }
486 if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
487 "VIA-PMU-CL", NULL)) {
488 pr_err("%s: couldn't get CL irq\n", __func__);
489 free_irq(IRQ_MAC_ADB_SR, NULL);
490 return -ENODEV;
491 }
492#endif /* !CONFIG_PPC_PMAC */
493
494 pmu_fully_inited = 1;
495
496 /* Make sure PMU settle down before continuing. This is _very_ important
497 * since the IDE probe may shut interrupts down for quite a bit of time. If
498 * a PMU communication is pending while this happens, the PMU may timeout
499 * Not that on Core99 machines, the PMU keeps sending us environement
500 * messages, we should find a way to either fix IDE or make it call
501 * pmu_suspend() before masking interrupts. This can also happens while
502 * scolling with some fbdevs.
503 */
504 do {
505 pmu_poll();
506 } while (pmu_state != idle);
507
508 return 0;
509}
510
511arch_initcall(via_pmu_start);
512
513/*
514 * This has to be done after pci_init, which is a subsys_initcall.
515 */
516static int __init via_pmu_dev_init(void)
517{
518 if (pmu_state == uninitialized)
519 return -ENODEV;
520
521#ifdef CONFIG_PMAC_BACKLIGHT
522 /* Initialize backlight */
523 pmu_backlight_init();
524#endif
525
526#ifdef CONFIG_PPC32
527 if (of_machine_is_compatible("AAPL,3400/2400") ||
528 of_machine_is_compatible("AAPL,3500")) {
529 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
530 NULL, PMAC_MB_INFO_MODEL, 0);
531 pmu_battery_count = 1;
532 if (mb == PMAC_TYPE_COMET)
533 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
534 else
535 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
536 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
537 of_machine_is_compatible("PowerBook1,1")) {
538 pmu_battery_count = 2;
539 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
540 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
541 } else {
542 struct device_node* prim =
543 of_find_node_by_name(NULL, "power-mgt");
544 const u32 *prim_info = NULL;
545 if (prim)
546 prim_info = of_get_property(prim, "prim-info", NULL);
547 if (prim_info) {
548 /* Other stuffs here yet unknown */
549 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
550 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
551 if (pmu_battery_count > 1)
552 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
553 }
554 of_node_put(prim);
555 }
556#endif /* CONFIG_PPC32 */
557
558 /* Create /proc/pmu */
559 proc_pmu_root = proc_mkdir("pmu", NULL);
560 if (proc_pmu_root) {
561 long i;
562
563 for (i=0; i<pmu_battery_count; i++) {
564 char title[16];
565 sprintf(title, "battery_%ld", i);
566 proc_pmu_batt[i] = proc_create_single_data(title, 0,
567 proc_pmu_root, pmu_battery_proc_show,
568 (void *)i);
569 }
570
571 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
572 pmu_info_proc_show);
573 proc_pmu_irqstats = proc_create_single("interrupts", 0,
574 proc_pmu_root, pmu_irqstats_proc_show);
575 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
576 &pmu_options_proc_fops);
577 }
578 return 0;
579}
580
581device_initcall(via_pmu_dev_init);
582
583static int
584init_pmu(void)
585{
586 int timeout;
587 struct adb_request req;
588
589 /* Negate TREQ. Set TACK to input and TREQ to output. */
590 out_8(&via2[B], in_8(&via2[B]) | TREQ);
591 out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
592
593 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
594 timeout = 100000;
595 while (!req.complete) {
596 if (--timeout < 0) {
597 printk(KERN_ERR "init_pmu: no response from PMU\n");
598 return 0;
599 }
600 udelay(10);
601 pmu_poll();
602 }
603
604 /* ack all pending interrupts */
605 timeout = 100000;
606 interrupt_data[0][0] = 1;
607 while (interrupt_data[0][0] || pmu_state != idle) {
608 if (--timeout < 0) {
609 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
610 return 0;
611 }
612 if (pmu_state == idle)
613 adb_int_pending = 1;
614 via_pmu_interrupt(0, NULL);
615 udelay(10);
616 }
617
618 /* Tell PMU we are ready. */
619 if (pmu_kind == PMU_KEYLARGO_BASED) {
620 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
621 while (!req.complete)
622 pmu_poll();
623 }
624
625 /* Read PMU version */
626 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
627 pmu_wait_complete(&req);
628 if (req.reply_len > 0)
629 pmu_version = req.reply[0];
630
631 /* Read server mode setting */
632 if (pmu_kind == PMU_KEYLARGO_BASED) {
633 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
634 PMU_PWR_GET_POWERUP_EVENTS);
635 pmu_wait_complete(&req);
636 if (req.reply_len == 2) {
637 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
638 option_server_mode = 1;
639 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
640 option_server_mode ? "enabled" : "disabled");
641 }
642 }
643
644 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
645 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
646
647 return 1;
648}
649
650int
651pmu_get_model(void)
652{
653 return pmu_kind;
654}
655
656static void pmu_set_server_mode(int server_mode)
657{
658 struct adb_request req;
659
660 if (pmu_kind != PMU_KEYLARGO_BASED)
661 return;
662
663 option_server_mode = server_mode;
664 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
665 pmu_wait_complete(&req);
666 if (req.reply_len < 2)
667 return;
668 if (server_mode)
669 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
670 PMU_PWR_SET_POWERUP_EVENTS,
671 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
672 else
673 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
674 PMU_PWR_CLR_POWERUP_EVENTS,
675 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
676 pmu_wait_complete(&req);
677}
678
679/* This new version of the code for 2400/3400/3500 powerbooks
680 * is inspired from the implementation in gkrellm-pmu
681 */
682static void
683done_battery_state_ohare(struct adb_request* req)
684{
685#ifdef CONFIG_PPC_PMAC
686 /* format:
687 * [0] : flags
688 * 0x01 : AC indicator
689 * 0x02 : charging
690 * 0x04 : battery exist
691 * 0x08 :
692 * 0x10 :
693 * 0x20 : full charged
694 * 0x40 : pcharge reset
695 * 0x80 : battery exist
696 *
697 * [1][2] : battery voltage
698 * [3] : CPU temperature
699 * [4] : battery temperature
700 * [5] : current
701 * [6][7] : pcharge
702 * --tkoba
703 */
704 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
705 long pcharge, charge, vb, vmax, lmax;
706 long vmax_charging, vmax_charged;
707 long amperage, voltage, time, max;
708 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
709 NULL, PMAC_MB_INFO_MODEL, 0);
710
711 if (req->reply[0] & 0x01)
712 pmu_power_flags |= PMU_PWR_AC_PRESENT;
713 else
714 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
715
716 if (mb == PMAC_TYPE_COMET) {
717 vmax_charged = 189;
718 vmax_charging = 213;
719 lmax = 6500;
720 } else {
721 vmax_charged = 330;
722 vmax_charging = 330;
723 lmax = 6500;
724 }
725 vmax = vmax_charged;
726
727 /* If battery installed */
728 if (req->reply[0] & 0x04) {
729 bat_flags |= PMU_BATT_PRESENT;
730 if (req->reply[0] & 0x02)
731 bat_flags |= PMU_BATT_CHARGING;
732 vb = (req->reply[1] << 8) | req->reply[2];
733 voltage = (vb * 265 + 72665) / 10;
734 amperage = req->reply[5];
735 if ((req->reply[0] & 0x01) == 0) {
736 if (amperage > 200)
737 vb += ((amperage - 200) * 15)/100;
738 } else if (req->reply[0] & 0x02) {
739 vb = (vb * 97) / 100;
740 vmax = vmax_charging;
741 }
742 charge = (100 * vb) / vmax;
743 if (req->reply[0] & 0x40) {
744 pcharge = (req->reply[6] << 8) + req->reply[7];
745 if (pcharge > lmax)
746 pcharge = lmax;
747 pcharge *= 100;
748 pcharge = 100 - pcharge / lmax;
749 if (pcharge < charge)
750 charge = pcharge;
751 }
752 if (amperage > 0)
753 time = (charge * 16440) / amperage;
754 else
755 time = 0;
756 max = 100;
757 amperage = -amperage;
758 } else
759 charge = max = amperage = voltage = time = 0;
760
761 pmu_batteries[pmu_cur_battery].flags = bat_flags;
762 pmu_batteries[pmu_cur_battery].charge = charge;
763 pmu_batteries[pmu_cur_battery].max_charge = max;
764 pmu_batteries[pmu_cur_battery].amperage = amperage;
765 pmu_batteries[pmu_cur_battery].voltage = voltage;
766 pmu_batteries[pmu_cur_battery].time_remaining = time;
767#endif /* CONFIG_PPC_PMAC */
768
769 clear_bit(0, &async_req_locks);
770}
771
772static void
773done_battery_state_smart(struct adb_request* req)
774{
775 /* format:
776 * [0] : format of this structure (known: 3,4,5)
777 * [1] : flags
778 *
779 * format 3 & 4:
780 *
781 * [2] : charge
782 * [3] : max charge
783 * [4] : current
784 * [5] : voltage
785 *
786 * format 5:
787 *
788 * [2][3] : charge
789 * [4][5] : max charge
790 * [6][7] : current
791 * [8][9] : voltage
792 */
793
794 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
795 int amperage;
796 unsigned int capa, max, voltage;
797
798 if (req->reply[1] & 0x01)
799 pmu_power_flags |= PMU_PWR_AC_PRESENT;
800 else
801 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
802
803
804 capa = max = amperage = voltage = 0;
805
806 if (req->reply[1] & 0x04) {
807 bat_flags |= PMU_BATT_PRESENT;
808 switch(req->reply[0]) {
809 case 3:
810 case 4: capa = req->reply[2];
811 max = req->reply[3];
812 amperage = *((signed char *)&req->reply[4]);
813 voltage = req->reply[5];
814 break;
815 case 5: capa = (req->reply[2] << 8) | req->reply[3];
816 max = (req->reply[4] << 8) | req->reply[5];
817 amperage = *((signed short *)&req->reply[6]);
818 voltage = (req->reply[8] << 8) | req->reply[9];
819 break;
820 default:
821 pr_warn("pmu.c: unrecognized battery info, "
822 "len: %d, %4ph\n", req->reply_len,
823 req->reply);
824 break;
825 }
826 }
827
828 if ((req->reply[1] & 0x01) && (amperage > 0))
829 bat_flags |= PMU_BATT_CHARGING;
830
831 pmu_batteries[pmu_cur_battery].flags = bat_flags;
832 pmu_batteries[pmu_cur_battery].charge = capa;
833 pmu_batteries[pmu_cur_battery].max_charge = max;
834 pmu_batteries[pmu_cur_battery].amperage = amperage;
835 pmu_batteries[pmu_cur_battery].voltage = voltage;
836 if (amperage) {
837 if ((req->reply[1] & 0x01) && (amperage > 0))
838 pmu_batteries[pmu_cur_battery].time_remaining
839 = ((max-capa) * 3600) / amperage;
840 else
841 pmu_batteries[pmu_cur_battery].time_remaining
842 = (capa * 3600) / (-amperage);
843 } else
844 pmu_batteries[pmu_cur_battery].time_remaining = 0;
845
846 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
847
848 clear_bit(0, &async_req_locks);
849}
850
851static void
852query_battery_state(void)
853{
854 if (test_and_set_bit(0, &async_req_locks))
855 return;
856 if (pmu_kind == PMU_OHARE_BASED)
857 pmu_request(&batt_req, done_battery_state_ohare,
858 1, PMU_BATTERY_STATE);
859 else
860 pmu_request(&batt_req, done_battery_state_smart,
861 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
862}
863
864static int pmu_info_proc_show(struct seq_file *m, void *v)
865{
866 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
867 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);
868 seq_printf(m, "AC Power : %d\n",
869 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
870 seq_printf(m, "Battery count : %d\n", pmu_battery_count);
871
872 return 0;
873}
874
875static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
876{
877 int i;
878 static const char *irq_names[NUM_IRQ_STATS] = {
879 "Unknown interrupt (type 0)",
880 "Unknown interrupt (type 1)",
881 "PC-Card eject button",
882 "Sound/Brightness button",
883 "ADB message",
884 "Battery state change",
885 "Environment interrupt",
886 "Tick timer",
887 "Ghost interrupt (zero len)",
888 "Empty interrupt (empty mask)",
889 "Max irqs in a row",
890 "Total CB1 triggered events",
891 "Total GPIO1 triggered events",
892 };
893
894 for (i = 0; i < NUM_IRQ_STATS; i++) {
895 seq_printf(m, " %2u: %10u (%s)\n",
896 i, pmu_irq_stats[i], irq_names[i]);
897 }
898 return 0;
899}
900
901static int pmu_battery_proc_show(struct seq_file *m, void *v)
902{
903 long batnum = (long)m->private;
904
905 seq_putc(m, '\n');
906 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);
907 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);
908 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
909 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);
910 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);
911 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);
912 return 0;
913}
914
915static int pmu_options_proc_show(struct seq_file *m, void *v)
916{
917#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
918 if (pmu_kind == PMU_KEYLARGO_BASED &&
919 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
920 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
921#endif
922 if (pmu_kind == PMU_KEYLARGO_BASED)
923 seq_printf(m, "server_mode=%d\n", option_server_mode);
924
925 return 0;
926}
927
928static int pmu_options_proc_open(struct inode *inode, struct file *file)
929{
930 return single_open(file, pmu_options_proc_show, NULL);
931}
932
933static ssize_t pmu_options_proc_write(struct file *file,
934 const char __user *buffer, size_t count, loff_t *pos)
935{
936 char tmp[33];
937 char *label, *val;
938 size_t fcount = count;
939
940 if (!count)
941 return -EINVAL;
942 if (count > 32)
943 count = 32;
944 if (copy_from_user(tmp, buffer, count))
945 return -EFAULT;
946 tmp[count] = 0;
947
948 label = tmp;
949 while(*label == ' ')
950 label++;
951 val = label;
952 while(*val && (*val != '=')) {
953 if (*val == ' ')
954 *val = 0;
955 val++;
956 }
957 if ((*val) == 0)
958 return -EINVAL;
959 *(val++) = 0;
960 while(*val == ' ')
961 val++;
962#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
963 if (pmu_kind == PMU_KEYLARGO_BASED &&
964 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
965 if (!strcmp(label, "lid_wakeup"))
966 option_lid_wakeup = ((*val) == '1');
967#endif
968 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
969 int new_value;
970 new_value = ((*val) == '1');
971 if (new_value != option_server_mode)
972 pmu_set_server_mode(new_value);
973 }
974 return fcount;
975}
976
977static const struct file_operations pmu_options_proc_fops = {
978 .owner = THIS_MODULE,
979 .open = pmu_options_proc_open,
980 .read = seq_read,
981 .llseek = seq_lseek,
982 .release = single_release,
983 .write = pmu_options_proc_write,
984};
985
986#ifdef CONFIG_ADB
987/* Send an ADB command */
988static int pmu_send_request(struct adb_request *req, int sync)
989{
990 int i, ret;
991
992 if (pmu_state == uninitialized || !pmu_fully_inited) {
993 req->complete = 1;
994 return -ENXIO;
995 }
996
997 ret = -EINVAL;
998
999 switch (req->data[0]) {
1000 case PMU_PACKET:
1001 for (i = 0; i < req->nbytes - 1; ++i)
1002 req->data[i] = req->data[i+1];
1003 --req->nbytes;
1004 if (pmu_data_len[req->data[0]][1] != 0) {
1005 req->reply[0] = ADB_RET_OK;
1006 req->reply_len = 1;
1007 } else
1008 req->reply_len = 0;
1009 ret = pmu_queue_request(req);
1010 break;
1011 case CUDA_PACKET:
1012 switch (req->data[1]) {
1013 case CUDA_GET_TIME:
1014 if (req->nbytes != 2)
1015 break;
1016 req->data[0] = PMU_READ_RTC;
1017 req->nbytes = 1;
1018 req->reply_len = 3;
1019 req->reply[0] = CUDA_PACKET;
1020 req->reply[1] = 0;
1021 req->reply[2] = CUDA_GET_TIME;
1022 ret = pmu_queue_request(req);
1023 break;
1024 case CUDA_SET_TIME:
1025 if (req->nbytes != 6)
1026 break;
1027 req->data[0] = PMU_SET_RTC;
1028 req->nbytes = 5;
1029 for (i = 1; i <= 4; ++i)
1030 req->data[i] = req->data[i+1];
1031 req->reply_len = 3;
1032 req->reply[0] = CUDA_PACKET;
1033 req->reply[1] = 0;
1034 req->reply[2] = CUDA_SET_TIME;
1035 ret = pmu_queue_request(req);
1036 break;
1037 }
1038 break;
1039 case ADB_PACKET:
1040 if (!pmu_has_adb)
1041 return -ENXIO;
1042 for (i = req->nbytes - 1; i > 1; --i)
1043 req->data[i+2] = req->data[i];
1044 req->data[3] = req->nbytes - 2;
1045 req->data[2] = pmu_adb_flags;
1046 /*req->data[1] = req->data[1];*/
1047 req->data[0] = PMU_ADB_CMD;
1048 req->nbytes += 2;
1049 req->reply_expected = 1;
1050 req->reply_len = 0;
1051 ret = pmu_queue_request(req);
1052 break;
1053 }
1054 if (ret) {
1055 req->complete = 1;
1056 return ret;
1057 }
1058
1059 if (sync)
1060 while (!req->complete)
1061 pmu_poll();
1062
1063 return 0;
1064}
1065
1066/* Enable/disable autopolling */
1067static int __pmu_adb_autopoll(int devs)
1068{
1069 struct adb_request req;
1070
1071 if (devs) {
1072 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1073 adb_dev_map >> 8, adb_dev_map);
1074 pmu_adb_flags = 2;
1075 } else {
1076 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1077 pmu_adb_flags = 0;
1078 }
1079 while (!req.complete)
1080 pmu_poll();
1081 return 0;
1082}
1083
1084static int pmu_adb_autopoll(int devs)
1085{
1086 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1087 return -ENXIO;
1088
1089 adb_dev_map = devs;
1090 return __pmu_adb_autopoll(devs);
1091}
1092
1093/* Reset the ADB bus */
1094static int pmu_adb_reset_bus(void)
1095{
1096 struct adb_request req;
1097 int save_autopoll = adb_dev_map;
1098
1099 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1100 return -ENXIO;
1101
1102 /* anyone got a better idea?? */
1103 __pmu_adb_autopoll(0);
1104
1105 req.nbytes = 4;
1106 req.done = NULL;
1107 req.data[0] = PMU_ADB_CMD;
1108 req.data[1] = ADB_BUSRESET;
1109 req.data[2] = 0;
1110 req.data[3] = 0;
1111 req.data[4] = 0;
1112 req.reply_len = 0;
1113 req.reply_expected = 1;
1114 if (pmu_queue_request(&req) != 0) {
1115 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1116 return -EIO;
1117 }
1118 pmu_wait_complete(&req);
1119
1120 if (save_autopoll != 0)
1121 __pmu_adb_autopoll(save_autopoll);
1122
1123 return 0;
1124}
1125#endif /* CONFIG_ADB */
1126
1127/* Construct and send a pmu request */
1128int
1129pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1130 int nbytes, ...)
1131{
1132 va_list list;
1133 int i;
1134
1135 if (pmu_state == uninitialized)
1136 return -ENXIO;
1137
1138 if (nbytes < 0 || nbytes > 32) {
1139 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1140 req->complete = 1;
1141 return -EINVAL;
1142 }
1143 req->nbytes = nbytes;
1144 req->done = done;
1145 va_start(list, nbytes);
1146 for (i = 0; i < nbytes; ++i)
1147 req->data[i] = va_arg(list, int);
1148 va_end(list);
1149 req->reply_len = 0;
1150 req->reply_expected = 0;
1151 return pmu_queue_request(req);
1152}
1153
1154int
1155pmu_queue_request(struct adb_request *req)
1156{
1157 unsigned long flags;
1158 int nsend;
1159
1160 if (pmu_state == uninitialized) {
1161 req->complete = 1;
1162 return -ENXIO;
1163 }
1164 if (req->nbytes <= 0) {
1165 req->complete = 1;
1166 return 0;
1167 }
1168 nsend = pmu_data_len[req->data[0]][0];
1169 if (nsend >= 0 && req->nbytes != nsend + 1) {
1170 req->complete = 1;
1171 return -EINVAL;
1172 }
1173
1174 req->next = NULL;
1175 req->sent = 0;
1176 req->complete = 0;
1177
1178 spin_lock_irqsave(&pmu_lock, flags);
1179 if (current_req) {
1180 last_req->next = req;
1181 last_req = req;
1182 } else {
1183 current_req = req;
1184 last_req = req;
1185 if (pmu_state == idle)
1186 pmu_start();
1187 }
1188 spin_unlock_irqrestore(&pmu_lock, flags);
1189
1190 return 0;
1191}
1192
1193static inline void
1194wait_for_ack(void)
1195{
1196 /* Sightly increased the delay, I had one occurrence of the message
1197 * reported
1198 */
1199 int timeout = 4000;
1200 while ((in_8(&via2[B]) & TACK) == 0) {
1201 if (--timeout < 0) {
1202 printk(KERN_ERR "PMU not responding (!ack)\n");
1203 return;
1204 }
1205 udelay(10);
1206 }
1207}
1208
1209/* New PMU seems to be very sensitive to those timings, so we make sure
1210 * PCI is flushed immediately */
1211static inline void
1212send_byte(int x)
1213{
1214 out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1215 out_8(&via1[SR], x);
1216 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */
1217 (void)in_8(&via2[B]);
1218}
1219
1220static inline void
1221recv_byte(void)
1222{
1223 out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1224 in_8(&via1[SR]); /* resets SR */
1225 out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1226 (void)in_8(&via2[B]);
1227}
1228
1229static inline void
1230pmu_done(struct adb_request *req)
1231{
1232 void (*done)(struct adb_request *) = req->done;
1233 mb();
1234 req->complete = 1;
1235 /* Here, we assume that if the request has a done member, the
1236 * struct request will survive to setting req->complete to 1
1237 */
1238 if (done)
1239 (*done)(req);
1240}
1241
1242static void
1243pmu_start(void)
1244{
1245 struct adb_request *req;
1246
1247 /* assert pmu_state == idle */
1248 /* get the packet to send */
1249 req = current_req;
1250 if (!req || pmu_state != idle
1251 || (/*req->reply_expected && */req_awaiting_reply))
1252 return;
1253
1254 pmu_state = sending;
1255 data_index = 1;
1256 data_len = pmu_data_len[req->data[0]][0];
1257
1258 /* Sounds safer to make sure ACK is high before writing. This helped
1259 * kill a problem with ADB and some iBooks
1260 */
1261 wait_for_ack();
1262 /* set the shift register to shift out and send a byte */
1263 send_byte(req->data[0]);
1264}
1265
1266void
1267pmu_poll(void)
1268{
1269 if (pmu_state == uninitialized)
1270 return;
1271 if (disable_poll)
1272 return;
1273 via_pmu_interrupt(0, NULL);
1274}
1275
1276void
1277pmu_poll_adb(void)
1278{
1279 if (pmu_state == uninitialized)
1280 return;
1281 if (disable_poll)
1282 return;
1283 /* Kicks ADB read when PMU is suspended */
1284 adb_int_pending = 1;
1285 do {
1286 via_pmu_interrupt(0, NULL);
1287 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1288 || req_awaiting_reply));
1289}
1290
1291void
1292pmu_wait_complete(struct adb_request *req)
1293{
1294 if (pmu_state == uninitialized)
1295 return;
1296 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1297 via_pmu_interrupt(0, NULL);
1298}
1299
1300/* This function loops until the PMU is idle and prevents it from
1301 * anwsering to ADB interrupts. pmu_request can still be called.
1302 * This is done to avoid spurrious shutdowns when we know we'll have
1303 * interrupts switched off for a long time
1304 */
1305void
1306pmu_suspend(void)
1307{
1308 unsigned long flags;
1309
1310 if (pmu_state == uninitialized)
1311 return;
1312
1313 spin_lock_irqsave(&pmu_lock, flags);
1314 pmu_suspended++;
1315 if (pmu_suspended > 1) {
1316 spin_unlock_irqrestore(&pmu_lock, flags);
1317 return;
1318 }
1319
1320 do {
1321 spin_unlock_irqrestore(&pmu_lock, flags);
1322 if (req_awaiting_reply)
1323 adb_int_pending = 1;
1324 via_pmu_interrupt(0, NULL);
1325 spin_lock_irqsave(&pmu_lock, flags);
1326 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1327 if (gpio_irq >= 0)
1328 disable_irq_nosync(gpio_irq);
1329 out_8(&via1[IER], CB1_INT | IER_CLR);
1330 spin_unlock_irqrestore(&pmu_lock, flags);
1331 break;
1332 }
1333 } while (1);
1334}
1335
1336void
1337pmu_resume(void)
1338{
1339 unsigned long flags;
1340
1341 if (pmu_state == uninitialized || pmu_suspended < 1)
1342 return;
1343
1344 spin_lock_irqsave(&pmu_lock, flags);
1345 pmu_suspended--;
1346 if (pmu_suspended > 0) {
1347 spin_unlock_irqrestore(&pmu_lock, flags);
1348 return;
1349 }
1350 adb_int_pending = 1;
1351 if (gpio_irq >= 0)
1352 enable_irq(gpio_irq);
1353 out_8(&via1[IER], CB1_INT | IER_SET);
1354 spin_unlock_irqrestore(&pmu_lock, flags);
1355 pmu_poll();
1356}
1357
1358/* Interrupt data could be the result data from an ADB cmd */
1359static void
1360pmu_handle_data(unsigned char *data, int len)
1361{
1362 unsigned char ints;
1363 int idx;
1364 int i = 0;
1365
1366 asleep = 0;
1367 if (drop_interrupts || len < 1) {
1368 adb_int_pending = 0;
1369 pmu_irq_stats[8]++;
1370 return;
1371 }
1372
1373 /* Get PMU interrupt mask */
1374 ints = data[0];
1375
1376 /* Record zero interrupts for stats */
1377 if (ints == 0)
1378 pmu_irq_stats[9]++;
1379
1380 /* Hack to deal with ADB autopoll flag */
1381 if (ints & PMU_INT_ADB)
1382 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1383
1384next:
1385 if (ints == 0) {
1386 if (i > pmu_irq_stats[10])
1387 pmu_irq_stats[10] = i;
1388 return;
1389 }
1390 i++;
1391
1392 idx = ffs(ints) - 1;
1393 ints &= ~BIT(idx);
1394
1395 pmu_irq_stats[idx]++;
1396
1397 /* Note: for some reason, we get an interrupt with len=1,
1398 * data[0]==0 after each normal ADB interrupt, at least
1399 * on the Pismo. Still investigating... --BenH
1400 */
1401 switch (BIT(idx)) {
1402 case PMU_INT_ADB:
1403 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1404 struct adb_request *req = req_awaiting_reply;
1405 if (!req) {
1406 printk(KERN_ERR "PMU: extra ADB reply\n");
1407 return;
1408 }
1409 req_awaiting_reply = NULL;
1410 if (len <= 2)
1411 req->reply_len = 0;
1412 else {
1413 memcpy(req->reply, data + 1, len - 1);
1414 req->reply_len = len - 1;
1415 }
1416 pmu_done(req);
1417 } else {
1418#ifdef CONFIG_XMON
1419 if (len == 4 && data[1] == 0x2c) {
1420 extern int xmon_wants_key, xmon_adb_keycode;
1421 if (xmon_wants_key) {
1422 xmon_adb_keycode = data[2];
1423 return;
1424 }
1425 }
1426#endif /* CONFIG_XMON */
1427#ifdef CONFIG_ADB
1428 /*
1429 * XXX On the [23]400 the PMU gives us an up
1430 * event for keycodes 0x74 or 0x75 when the PC
1431 * card eject buttons are released, so we
1432 * ignore those events.
1433 */
1434 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1435 && data[1] == 0x2c && data[3] == 0xff
1436 && (data[2] & ~1) == 0xf4))
1437 adb_input(data+1, len-1, 1);
1438#endif /* CONFIG_ADB */
1439 }
1440 break;
1441
1442 /* Sound/brightness button pressed */
1443 case PMU_INT_SNDBRT:
1444#ifdef CONFIG_PMAC_BACKLIGHT
1445 if (len == 3)
1446 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1447#endif
1448 break;
1449
1450 /* Tick interrupt */
1451 case PMU_INT_TICK:
1452 /* Environment or tick interrupt, query batteries */
1453 if (pmu_battery_count) {
1454 if ((--query_batt_timer) == 0) {
1455 query_battery_state();
1456 query_batt_timer = BATTERY_POLLING_COUNT;
1457 }
1458 }
1459 break;
1460
1461 case PMU_INT_ENVIRONMENT:
1462 if (pmu_battery_count)
1463 query_battery_state();
1464 pmu_pass_intr(data, len);
1465 /* len == 6 is probably a bad check. But how do I
1466 * know what PMU versions send what events here? */
1467 if (len == 6) {
1468 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1469 via_pmu_event(PMU_EVT_LID, data[1]&1);
1470 }
1471 break;
1472
1473 default:
1474 pmu_pass_intr(data, len);
1475 }
1476 goto next;
1477}
1478
1479static struct adb_request*
1480pmu_sr_intr(void)
1481{
1482 struct adb_request *req;
1483 int bite = 0;
1484
1485 if (in_8(&via2[B]) & TREQ) {
1486 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1487 return NULL;
1488 }
1489 /* The ack may not yet be low when we get the interrupt */
1490 while ((in_8(&via2[B]) & TACK) != 0)
1491 ;
1492
1493 /* if reading grab the byte, and reset the interrupt */
1494 if (pmu_state == reading || pmu_state == reading_intr)
1495 bite = in_8(&via1[SR]);
1496
1497 /* reset TREQ and wait for TACK to go high */
1498 out_8(&via2[B], in_8(&via2[B]) | TREQ);
1499 wait_for_ack();
1500
1501 switch (pmu_state) {
1502 case sending:
1503 req = current_req;
1504 if (data_len < 0) {
1505 data_len = req->nbytes - 1;
1506 send_byte(data_len);
1507 break;
1508 }
1509 if (data_index <= data_len) {
1510 send_byte(req->data[data_index++]);
1511 break;
1512 }
1513 req->sent = 1;
1514 data_len = pmu_data_len[req->data[0]][1];
1515 if (data_len == 0) {
1516 pmu_state = idle;
1517 current_req = req->next;
1518 if (req->reply_expected)
1519 req_awaiting_reply = req;
1520 else
1521 return req;
1522 } else {
1523 pmu_state = reading;
1524 data_index = 0;
1525 reply_ptr = req->reply + req->reply_len;
1526 recv_byte();
1527 }
1528 break;
1529
1530 case intack:
1531 data_index = 0;
1532 data_len = -1;
1533 pmu_state = reading_intr;
1534 reply_ptr = interrupt_data[int_data_last];
1535 recv_byte();
1536 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1537 enable_irq(gpio_irq);
1538 gpio_irq_enabled = 1;
1539 }
1540 break;
1541
1542 case reading:
1543 case reading_intr:
1544 if (data_len == -1) {
1545 data_len = bite;
1546 if (bite > 32)
1547 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1548 } else if (data_index < 32) {
1549 reply_ptr[data_index++] = bite;
1550 }
1551 if (data_index < data_len) {
1552 recv_byte();
1553 break;
1554 }
1555
1556 if (pmu_state == reading_intr) {
1557 pmu_state = idle;
1558 int_data_state[int_data_last] = int_data_ready;
1559 interrupt_data_len[int_data_last] = data_len;
1560 } else {
1561 req = current_req;
1562 /*
1563 * For PMU sleep and freq change requests, we lock the
1564 * PMU until it's explicitly unlocked. This avoids any
1565 * spurrious event polling getting in
1566 */
1567 current_req = req->next;
1568 req->reply_len += data_index;
1569 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1570 pmu_state = locked;
1571 else
1572 pmu_state = idle;
1573 return req;
1574 }
1575 break;
1576
1577 default:
1578 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1579 pmu_state);
1580 }
1581 return NULL;
1582}
1583
1584static irqreturn_t
1585via_pmu_interrupt(int irq, void *arg)
1586{
1587 unsigned long flags;
1588 int intr;
1589 int nloop = 0;
1590 int int_data = -1;
1591 struct adb_request *req = NULL;
1592 int handled = 0;
1593
1594 /* This is a bit brutal, we can probably do better */
1595 spin_lock_irqsave(&pmu_lock, flags);
1596 ++disable_poll;
1597
1598 for (;;) {
1599 /* On 68k Macs, VIA interrupts are dispatched individually.
1600 * Unless we are polling, the relevant IRQ flag has already
1601 * been cleared.
1602 */
1603 intr = 0;
1604 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1605 intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1606 out_8(&via1[IFR], intr);
1607 }
1608#ifndef CONFIG_PPC_PMAC
1609 switch (irq) {
1610 case IRQ_MAC_ADB_CL:
1611 intr = CB1_INT;
1612 break;
1613 case IRQ_MAC_ADB_SR:
1614 intr = SR_INT;
1615 break;
1616 }
1617#endif
1618 if (intr == 0)
1619 break;
1620 handled = 1;
1621 if (++nloop > 1000) {
1622 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1623 "intr=%x, ier=%x pmu_state=%d\n",
1624 intr, in_8(&via1[IER]), pmu_state);
1625 break;
1626 }
1627 if (intr & CB1_INT) {
1628 adb_int_pending = 1;
1629 pmu_irq_stats[11]++;
1630 }
1631 if (intr & SR_INT) {
1632 req = pmu_sr_intr();
1633 if (req)
1634 break;
1635 }
1636#ifndef CONFIG_PPC_PMAC
1637 break;
1638#endif
1639 }
1640
1641recheck:
1642 if (pmu_state == idle) {
1643 if (adb_int_pending) {
1644 if (int_data_state[0] == int_data_empty)
1645 int_data_last = 0;
1646 else if (int_data_state[1] == int_data_empty)
1647 int_data_last = 1;
1648 else
1649 goto no_free_slot;
1650 pmu_state = intack;
1651 int_data_state[int_data_last] = int_data_fill;
1652 /* Sounds safer to make sure ACK is high before writing.
1653 * This helped kill a problem with ADB and some iBooks
1654 */
1655 wait_for_ack();
1656 send_byte(PMU_INT_ACK);
1657 adb_int_pending = 0;
1658 } else if (current_req)
1659 pmu_start();
1660 }
1661no_free_slot:
1662 /* Mark the oldest buffer for flushing */
1663 if (int_data_state[!int_data_last] == int_data_ready) {
1664 int_data_state[!int_data_last] = int_data_flush;
1665 int_data = !int_data_last;
1666 } else if (int_data_state[int_data_last] == int_data_ready) {
1667 int_data_state[int_data_last] = int_data_flush;
1668 int_data = int_data_last;
1669 }
1670 --disable_poll;
1671 spin_unlock_irqrestore(&pmu_lock, flags);
1672
1673 /* Deal with completed PMU requests outside of the lock */
1674 if (req) {
1675 pmu_done(req);
1676 req = NULL;
1677 }
1678
1679 /* Deal with interrupt datas outside of the lock */
1680 if (int_data >= 0) {
1681 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1682 spin_lock_irqsave(&pmu_lock, flags);
1683 ++disable_poll;
1684 int_data_state[int_data] = int_data_empty;
1685 int_data = -1;
1686 goto recheck;
1687 }
1688
1689 return IRQ_RETVAL(handled);
1690}
1691
1692void
1693pmu_unlock(void)
1694{
1695 unsigned long flags;
1696
1697 spin_lock_irqsave(&pmu_lock, flags);
1698 if (pmu_state == locked)
1699 pmu_state = idle;
1700 adb_int_pending = 1;
1701 spin_unlock_irqrestore(&pmu_lock, flags);
1702}
1703
1704
1705static __maybe_unused irqreturn_t
1706gpio1_interrupt(int irq, void *arg)
1707{
1708 unsigned long flags;
1709
1710 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1711 spin_lock_irqsave(&pmu_lock, flags);
1712 if (gpio_irq_enabled > 0) {
1713 disable_irq_nosync(gpio_irq);
1714 gpio_irq_enabled = 0;
1715 }
1716 pmu_irq_stats[12]++;
1717 adb_int_pending = 1;
1718 spin_unlock_irqrestore(&pmu_lock, flags);
1719 via_pmu_interrupt(0, NULL);
1720 return IRQ_HANDLED;
1721 }
1722 return IRQ_NONE;
1723}
1724
1725void
1726pmu_enable_irled(int on)
1727{
1728 struct adb_request req;
1729
1730 if (pmu_state == uninitialized)
1731 return ;
1732 if (pmu_kind == PMU_KEYLARGO_BASED)
1733 return ;
1734
1735 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1736 (on ? PMU_POW_ON : PMU_POW_OFF));
1737 pmu_wait_complete(&req);
1738}
1739
1740void
1741pmu_restart(void)
1742{
1743 struct adb_request req;
1744
1745 if (pmu_state == uninitialized)
1746 return;
1747
1748 local_irq_disable();
1749
1750 drop_interrupts = 1;
1751
1752 if (pmu_kind != PMU_KEYLARGO_BASED) {
1753 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1754 PMU_INT_TICK );
1755 while(!req.complete)
1756 pmu_poll();
1757 }
1758
1759 pmu_request(&req, NULL, 1, PMU_RESET);
1760 pmu_wait_complete(&req);
1761 for (;;)
1762 ;
1763}
1764
1765void
1766pmu_shutdown(void)
1767{
1768 struct adb_request req;
1769
1770 if (pmu_state == uninitialized)
1771 return;
1772
1773 local_irq_disable();
1774
1775 drop_interrupts = 1;
1776
1777 if (pmu_kind != PMU_KEYLARGO_BASED) {
1778 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1779 PMU_INT_TICK );
1780 pmu_wait_complete(&req);
1781 } else {
1782 /* Disable server mode on shutdown or we'll just
1783 * wake up again
1784 */
1785 pmu_set_server_mode(0);
1786 }
1787
1788 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1789 'M', 'A', 'T', 'T');
1790 pmu_wait_complete(&req);
1791 for (;;)
1792 ;
1793}
1794
1795int
1796pmu_present(void)
1797{
1798 return pmu_state != uninitialized;
1799}
1800
1801#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1802/*
1803 * Put the powerbook to sleep.
1804 */
1805
1806static u32 save_via[8];
1807
1808static void
1809save_via_state(void)
1810{
1811 save_via[0] = in_8(&via1[ANH]);
1812 save_via[1] = in_8(&via1[DIRA]);
1813 save_via[2] = in_8(&via1[B]);
1814 save_via[3] = in_8(&via1[DIRB]);
1815 save_via[4] = in_8(&via1[PCR]);
1816 save_via[5] = in_8(&via1[ACR]);
1817 save_via[6] = in_8(&via1[T1CL]);
1818 save_via[7] = in_8(&via1[T1CH]);
1819}
1820static void
1821restore_via_state(void)
1822{
1823 out_8(&via1[ANH], save_via[0]);
1824 out_8(&via1[DIRA], save_via[1]);
1825 out_8(&via1[B], save_via[2]);
1826 out_8(&via1[DIRB], save_via[3]);
1827 out_8(&via1[PCR], save_via[4]);
1828 out_8(&via1[ACR], save_via[5]);
1829 out_8(&via1[T1CL], save_via[6]);
1830 out_8(&via1[T1CH], save_via[7]);
1831 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */
1832 out_8(&via1[IFR], 0x7f); /* clear IFR */
1833 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1834}
1835
1836#define GRACKLE_PM (1<<7)
1837#define GRACKLE_DOZE (1<<5)
1838#define GRACKLE_NAP (1<<4)
1839#define GRACKLE_SLEEP (1<<3)
1840
1841static int powerbook_sleep_grackle(void)
1842{
1843 unsigned long save_l2cr;
1844 unsigned short pmcr1;
1845 struct adb_request req;
1846 struct pci_dev *grackle;
1847
1848 grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1849 if (!grackle)
1850 return -ENODEV;
1851
1852 /* Turn off various things. Darwin does some retry tests here... */
1853 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1854 pmu_wait_complete(&req);
1855 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1856 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1857 pmu_wait_complete(&req);
1858
1859 /* For 750, save backside cache setting and disable it */
1860 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1861
1862 if (!__fake_sleep) {
1863 /* Ask the PMU to put us to sleep */
1864 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1865 pmu_wait_complete(&req);
1866 }
1867
1868 /* The VIA is supposed not to be restored correctly*/
1869 save_via_state();
1870 /* We shut down some HW */
1871 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1872
1873 pci_read_config_word(grackle, 0x70, &pmcr1);
1874 /* Apparently, MacOS uses NAP mode for Grackle ??? */
1875 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1876 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1877 pci_write_config_word(grackle, 0x70, pmcr1);
1878
1879 /* Call low-level ASM sleep handler */
1880 if (__fake_sleep)
1881 mdelay(5000);
1882 else
1883 low_sleep_handler();
1884
1885 /* We're awake again, stop grackle PM */
1886 pci_read_config_word(grackle, 0x70, &pmcr1);
1887 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1888 pci_write_config_word(grackle, 0x70, pmcr1);
1889
1890 pci_dev_put(grackle);
1891
1892 /* Make sure the PMU is idle */
1893 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1894 restore_via_state();
1895
1896 /* Restore L2 cache */
1897 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1898 _set_L2CR(save_l2cr);
1899
1900 /* Restore userland MMU context */
1901 switch_mmu_context(NULL, current->active_mm, NULL);
1902
1903 /* Power things up */
1904 pmu_unlock();
1905 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1906 pmu_wait_complete(&req);
1907 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1908 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1909 pmu_wait_complete(&req);
1910 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1911 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1912 pmu_wait_complete(&req);
1913
1914 return 0;
1915}
1916
1917static int
1918powerbook_sleep_Core99(void)
1919{
1920 unsigned long save_l2cr;
1921 unsigned long save_l3cr;
1922 struct adb_request req;
1923
1924 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1925 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1926 return -ENOSYS;
1927 }
1928
1929 if (num_online_cpus() > 1 || cpu_is_offline(0))
1930 return -EAGAIN;
1931
1932 /* Stop environment and ADB interrupts */
1933 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1934 pmu_wait_complete(&req);
1935
1936 /* Tell PMU what events will wake us up */
1937 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1938 0xff, 0xff);
1939 pmu_wait_complete(&req);
1940 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1941 0, PMU_PWR_WAKEUP_KEY |
1942 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1943 pmu_wait_complete(&req);
1944
1945 /* Save the state of the L2 and L3 caches */
1946 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
1947 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
1948
1949 if (!__fake_sleep) {
1950 /* Ask the PMU to put us to sleep */
1951 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1952 pmu_wait_complete(&req);
1953 }
1954
1955 /* The VIA is supposed not to be restored correctly*/
1956 save_via_state();
1957
1958 /* Shut down various ASICs. There's a chance that we can no longer
1959 * talk to the PMU after this, so I moved it to _after_ sending the
1960 * sleep command to it. Still need to be checked.
1961 */
1962 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1963
1964 /* Call low-level ASM sleep handler */
1965 if (__fake_sleep)
1966 mdelay(5000);
1967 else
1968 low_sleep_handler();
1969
1970 /* Restore Apple core ASICs state */
1971 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1972
1973 /* Restore VIA */
1974 restore_via_state();
1975
1976 /* tweak LPJ before cpufreq is there */
1977 loops_per_jiffy *= 2;
1978
1979 /* Restore video */
1980 pmac_call_early_video_resume();
1981
1982 /* Restore L2 cache */
1983 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1984 _set_L2CR(save_l2cr);
1985 /* Restore L3 cache */
1986 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1987 _set_L3CR(save_l3cr);
1988
1989 /* Restore userland MMU context */
1990 switch_mmu_context(NULL, current->active_mm, NULL);
1991
1992 /* Tell PMU we are ready */
1993 pmu_unlock();
1994 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1995 pmu_wait_complete(&req);
1996 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1997 pmu_wait_complete(&req);
1998
1999 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2000 loops_per_jiffy /= 2;
2001
2002 return 0;
2003}
2004
2005#define PB3400_MEM_CTRL 0xf8000000
2006#define PB3400_MEM_CTRL_SLEEP 0x70
2007
2008static void __iomem *pb3400_mem_ctrl;
2009
2010static void powerbook_sleep_init_3400(void)
2011{
2012 /* map in the memory controller registers */
2013 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2014 if (pb3400_mem_ctrl == NULL)
2015 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2016}
2017
2018static int powerbook_sleep_3400(void)
2019{
2020 int i, x;
2021 unsigned int hid0;
2022 unsigned long msr;
2023 struct adb_request sleep_req;
2024 unsigned int __iomem *mem_ctrl_sleep;
2025
2026 if (pb3400_mem_ctrl == NULL)
2027 return -ENOMEM;
2028 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2029
2030 /* Set the memory controller to keep the memory refreshed
2031 while we're asleep */
2032 for (i = 0x403f; i >= 0x4000; --i) {
2033 out_be32(mem_ctrl_sleep, i);
2034 do {
2035 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2036 } while (x == 0);
2037 if (x >= 0x100)
2038 break;
2039 }
2040
2041 /* Ask the PMU to put us to sleep */
2042 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2043 pmu_wait_complete(&sleep_req);
2044 pmu_unlock();
2045
2046 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2047
2048 asleep = 1;
2049
2050 /* Put the CPU into sleep mode */
2051 hid0 = mfspr(SPRN_HID0);
2052 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2053 mtspr(SPRN_HID0, hid0);
2054 local_irq_enable();
2055 msr = mfmsr() | MSR_POW;
2056 while (asleep) {
2057 mb();
2058 mtmsr(msr);
2059 isync();
2060 }
2061 local_irq_disable();
2062
2063 /* OK, we're awake again, start restoring things */
2064 out_be32(mem_ctrl_sleep, 0x3f);
2065 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2066
2067 return 0;
2068}
2069
2070#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2071
2072/*
2073 * Support for /dev/pmu device
2074 */
2075#define RB_SIZE 0x10
2076struct pmu_private {
2077 struct list_head list;
2078 int rb_get;
2079 int rb_put;
2080 struct rb_entry {
2081 unsigned short len;
2082 unsigned char data[16];
2083 } rb_buf[RB_SIZE];
2084 wait_queue_head_t wait;
2085 spinlock_t lock;
2086#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2087 int backlight_locker;
2088#endif
2089};
2090
2091static LIST_HEAD(all_pmu_pvt);
2092static DEFINE_SPINLOCK(all_pvt_lock);
2093
2094static void
2095pmu_pass_intr(unsigned char *data, int len)
2096{
2097 struct pmu_private *pp;
2098 struct list_head *list;
2099 int i;
2100 unsigned long flags;
2101
2102 if (len > sizeof(pp->rb_buf[0].data))
2103 len = sizeof(pp->rb_buf[0].data);
2104 spin_lock_irqsave(&all_pvt_lock, flags);
2105 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2106 pp = list_entry(list, struct pmu_private, list);
2107 spin_lock(&pp->lock);
2108 i = pp->rb_put + 1;
2109 if (i >= RB_SIZE)
2110 i = 0;
2111 if (i != pp->rb_get) {
2112 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2113 rp->len = len;
2114 memcpy(rp->data, data, len);
2115 pp->rb_put = i;
2116 wake_up_interruptible(&pp->wait);
2117 }
2118 spin_unlock(&pp->lock);
2119 }
2120 spin_unlock_irqrestore(&all_pvt_lock, flags);
2121}
2122
2123static int
2124pmu_open(struct inode *inode, struct file *file)
2125{
2126 struct pmu_private *pp;
2127 unsigned long flags;
2128
2129 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2130 if (!pp)
2131 return -ENOMEM;
2132 pp->rb_get = pp->rb_put = 0;
2133 spin_lock_init(&pp->lock);
2134 init_waitqueue_head(&pp->wait);
2135 mutex_lock(&pmu_info_proc_mutex);
2136 spin_lock_irqsave(&all_pvt_lock, flags);
2137#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2138 pp->backlight_locker = 0;
2139#endif
2140 list_add(&pp->list, &all_pmu_pvt);
2141 spin_unlock_irqrestore(&all_pvt_lock, flags);
2142 file->private_data = pp;
2143 mutex_unlock(&pmu_info_proc_mutex);
2144 return 0;
2145}
2146
2147static ssize_t
2148pmu_read(struct file *file, char __user *buf,
2149 size_t count, loff_t *ppos)
2150{
2151 struct pmu_private *pp = file->private_data;
2152 DECLARE_WAITQUEUE(wait, current);
2153 unsigned long flags;
2154 int ret = 0;
2155
2156 if (count < 1 || !pp)
2157 return -EINVAL;
2158 if (!access_ok(VERIFY_WRITE, buf, count))
2159 return -EFAULT;
2160
2161 spin_lock_irqsave(&pp->lock, flags);
2162 add_wait_queue(&pp->wait, &wait);
2163 set_current_state(TASK_INTERRUPTIBLE);
2164
2165 for (;;) {
2166 ret = -EAGAIN;
2167 if (pp->rb_get != pp->rb_put) {
2168 int i = pp->rb_get;
2169 struct rb_entry *rp = &pp->rb_buf[i];
2170 ret = rp->len;
2171 spin_unlock_irqrestore(&pp->lock, flags);
2172 if (ret > count)
2173 ret = count;
2174 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2175 ret = -EFAULT;
2176 if (++i >= RB_SIZE)
2177 i = 0;
2178 spin_lock_irqsave(&pp->lock, flags);
2179 pp->rb_get = i;
2180 }
2181 if (ret >= 0)
2182 break;
2183 if (file->f_flags & O_NONBLOCK)
2184 break;
2185 ret = -ERESTARTSYS;
2186 if (signal_pending(current))
2187 break;
2188 spin_unlock_irqrestore(&pp->lock, flags);
2189 schedule();
2190 spin_lock_irqsave(&pp->lock, flags);
2191 }
2192 __set_current_state(TASK_RUNNING);
2193 remove_wait_queue(&pp->wait, &wait);
2194 spin_unlock_irqrestore(&pp->lock, flags);
2195
2196 return ret;
2197}
2198
2199static ssize_t
2200pmu_write(struct file *file, const char __user *buf,
2201 size_t count, loff_t *ppos)
2202{
2203 return 0;
2204}
2205
2206static __poll_t
2207pmu_fpoll(struct file *filp, poll_table *wait)
2208{
2209 struct pmu_private *pp = filp->private_data;
2210 __poll_t mask = 0;
2211 unsigned long flags;
2212
2213 if (!pp)
2214 return 0;
2215 poll_wait(filp, &pp->wait, wait);
2216 spin_lock_irqsave(&pp->lock, flags);
2217 if (pp->rb_get != pp->rb_put)
2218 mask |= EPOLLIN;
2219 spin_unlock_irqrestore(&pp->lock, flags);
2220 return mask;
2221}
2222
2223static int
2224pmu_release(struct inode *inode, struct file *file)
2225{
2226 struct pmu_private *pp = file->private_data;
2227 unsigned long flags;
2228
2229 if (pp) {
2230 file->private_data = NULL;
2231 spin_lock_irqsave(&all_pvt_lock, flags);
2232 list_del(&pp->list);
2233 spin_unlock_irqrestore(&all_pvt_lock, flags);
2234
2235#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2236 if (pp->backlight_locker)
2237 pmac_backlight_enable();
2238#endif
2239
2240 kfree(pp);
2241 }
2242 return 0;
2243}
2244
2245#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2246static void pmac_suspend_disable_irqs(void)
2247{
2248 /* Call platform functions marked "on sleep" */
2249 pmac_pfunc_i2c_suspend();
2250 pmac_pfunc_base_suspend();
2251}
2252
2253static int powerbook_sleep(suspend_state_t state)
2254{
2255 int error = 0;
2256
2257 /* Wait for completion of async requests */
2258 while (!batt_req.complete)
2259 pmu_poll();
2260
2261 /* Giveup the lazy FPU & vec so we don't have to back them
2262 * up from the low level code
2263 */
2264 enable_kernel_fp();
2265
2266#ifdef CONFIG_ALTIVEC
2267 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2268 enable_kernel_altivec();
2269#endif /* CONFIG_ALTIVEC */
2270
2271 switch (pmu_kind) {
2272 case PMU_OHARE_BASED:
2273 error = powerbook_sleep_3400();
2274 break;
2275 case PMU_HEATHROW_BASED:
2276 case PMU_PADDINGTON_BASED:
2277 error = powerbook_sleep_grackle();
2278 break;
2279 case PMU_KEYLARGO_BASED:
2280 error = powerbook_sleep_Core99();
2281 break;
2282 default:
2283 return -ENOSYS;
2284 }
2285
2286 if (error)
2287 return error;
2288
2289 mdelay(100);
2290
2291 return 0;
2292}
2293
2294static void pmac_suspend_enable_irqs(void)
2295{
2296 /* Force a poll of ADB interrupts */
2297 adb_int_pending = 1;
2298 via_pmu_interrupt(0, NULL);
2299
2300 mdelay(10);
2301
2302 /* Call platform functions marked "on wake" */
2303 pmac_pfunc_base_resume();
2304 pmac_pfunc_i2c_resume();
2305}
2306
2307static int pmu_sleep_valid(suspend_state_t state)
2308{
2309 return state == PM_SUSPEND_MEM
2310 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2311}
2312
2313static const struct platform_suspend_ops pmu_pm_ops = {
2314 .enter = powerbook_sleep,
2315 .valid = pmu_sleep_valid,
2316};
2317
2318static int register_pmu_pm_ops(void)
2319{
2320 if (pmu_kind == PMU_OHARE_BASED)
2321 powerbook_sleep_init_3400();
2322 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2323 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2324 suspend_set_ops(&pmu_pm_ops);
2325
2326 return 0;
2327}
2328
2329device_initcall(register_pmu_pm_ops);
2330#endif
2331
2332static int pmu_ioctl(struct file *filp,
2333 u_int cmd, u_long arg)
2334{
2335 __u32 __user *argp = (__u32 __user *)arg;
2336 int error = -EINVAL;
2337
2338 switch (cmd) {
2339#ifdef CONFIG_PPC_PMAC
2340 case PMU_IOC_SLEEP:
2341 if (!capable(CAP_SYS_ADMIN))
2342 return -EACCES;
2343 return pm_suspend(PM_SUSPEND_MEM);
2344 case PMU_IOC_CAN_SLEEP:
2345 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2346 return put_user(0, argp);
2347 else
2348 return put_user(1, argp);
2349#endif
2350
2351#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2352 /* Compatibility ioctl's for backlight */
2353 case PMU_IOC_GET_BACKLIGHT:
2354 {
2355 int brightness;
2356
2357 brightness = pmac_backlight_get_legacy_brightness();
2358 if (brightness < 0)
2359 return brightness;
2360 else
2361 return put_user(brightness, argp);
2362
2363 }
2364 case PMU_IOC_SET_BACKLIGHT:
2365 {
2366 int brightness;
2367
2368 error = get_user(brightness, argp);
2369 if (error)
2370 return error;
2371
2372 return pmac_backlight_set_legacy_brightness(brightness);
2373 }
2374#ifdef CONFIG_INPUT_ADBHID
2375 case PMU_IOC_GRAB_BACKLIGHT: {
2376 struct pmu_private *pp = filp->private_data;
2377
2378 if (pp->backlight_locker)
2379 return 0;
2380
2381 pp->backlight_locker = 1;
2382 pmac_backlight_disable();
2383
2384 return 0;
2385 }
2386#endif /* CONFIG_INPUT_ADBHID */
2387#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2388
2389 case PMU_IOC_GET_MODEL:
2390 return put_user(pmu_kind, argp);
2391 case PMU_IOC_HAS_ADB:
2392 return put_user(pmu_has_adb, argp);
2393 }
2394 return error;
2395}
2396
2397static long pmu_unlocked_ioctl(struct file *filp,
2398 u_int cmd, u_long arg)
2399{
2400 int ret;
2401
2402 mutex_lock(&pmu_info_proc_mutex);
2403 ret = pmu_ioctl(filp, cmd, arg);
2404 mutex_unlock(&pmu_info_proc_mutex);
2405
2406 return ret;
2407}
2408
2409#ifdef CONFIG_COMPAT
2410#define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2411#define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2412#define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)
2413#define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)
2414#define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)
2415#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2416
2417static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2418{
2419 switch (cmd) {
2420 case PMU_IOC_SLEEP:
2421 break;
2422 case PMU_IOC_GET_BACKLIGHT32:
2423 cmd = PMU_IOC_GET_BACKLIGHT;
2424 break;
2425 case PMU_IOC_SET_BACKLIGHT32:
2426 cmd = PMU_IOC_SET_BACKLIGHT;
2427 break;
2428 case PMU_IOC_GET_MODEL32:
2429 cmd = PMU_IOC_GET_MODEL;
2430 break;
2431 case PMU_IOC_HAS_ADB32:
2432 cmd = PMU_IOC_HAS_ADB;
2433 break;
2434 case PMU_IOC_CAN_SLEEP32:
2435 cmd = PMU_IOC_CAN_SLEEP;
2436 break;
2437 case PMU_IOC_GRAB_BACKLIGHT32:
2438 cmd = PMU_IOC_GRAB_BACKLIGHT;
2439 break;
2440 default:
2441 return -ENOIOCTLCMD;
2442 }
2443 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2444}
2445#endif
2446
2447static const struct file_operations pmu_device_fops = {
2448 .read = pmu_read,
2449 .write = pmu_write,
2450 .poll = pmu_fpoll,
2451 .unlocked_ioctl = pmu_unlocked_ioctl,
2452#ifdef CONFIG_COMPAT
2453 .compat_ioctl = compat_pmu_ioctl,
2454#endif
2455 .open = pmu_open,
2456 .release = pmu_release,
2457 .llseek = noop_llseek,
2458};
2459
2460static struct miscdevice pmu_device = {
2461 PMU_MINOR, "pmu", &pmu_device_fops
2462};
2463
2464static int pmu_device_init(void)
2465{
2466 if (pmu_state == uninitialized)
2467 return 0;
2468 if (misc_register(&pmu_device) < 0)
2469 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2470 return 0;
2471}
2472device_initcall(pmu_device_init);
2473
2474
2475#ifdef DEBUG_SLEEP
2476static inline void
2477polled_handshake(void)
2478{
2479 via2[B] &= ~TREQ; eieio();
2480 while ((via2[B] & TACK) != 0)
2481 ;
2482 via2[B] |= TREQ; eieio();
2483 while ((via2[B] & TACK) == 0)
2484 ;
2485}
2486
2487static inline void
2488polled_send_byte(int x)
2489{
2490 via1[ACR] |= SR_OUT | SR_EXT; eieio();
2491 via1[SR] = x; eieio();
2492 polled_handshake();
2493}
2494
2495static inline int
2496polled_recv_byte(void)
2497{
2498 int x;
2499
2500 via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2501 x = via1[SR]; eieio();
2502 polled_handshake();
2503 x = via1[SR]; eieio();
2504 return x;
2505}
2506
2507int
2508pmu_polled_request(struct adb_request *req)
2509{
2510 unsigned long flags;
2511 int i, l, c;
2512
2513 req->complete = 1;
2514 c = req->data[0];
2515 l = pmu_data_len[c][0];
2516 if (l >= 0 && req->nbytes != l + 1)
2517 return -EINVAL;
2518
2519 local_irq_save(flags);
2520 while (pmu_state != idle)
2521 pmu_poll();
2522
2523 while ((via2[B] & TACK) == 0)
2524 ;
2525 polled_send_byte(c);
2526 if (l < 0) {
2527 l = req->nbytes - 1;
2528 polled_send_byte(l);
2529 }
2530 for (i = 1; i <= l; ++i)
2531 polled_send_byte(req->data[i]);
2532
2533 l = pmu_data_len[c][1];
2534 if (l < 0)
2535 l = polled_recv_byte();
2536 for (i = 0; i < l; ++i)
2537 req->reply[i + req->reply_len] = polled_recv_byte();
2538
2539 if (req->done)
2540 (*req->done)(req);
2541
2542 local_irq_restore(flags);
2543 return 0;
2544}
2545
2546/* N.B. This doesn't work on the 3400 */
2547void pmu_blink(int n)
2548{
2549 struct adb_request req;
2550
2551 memset(&req, 0, sizeof(req));
2552
2553 for (; n > 0; --n) {
2554 req.nbytes = 4;
2555 req.done = NULL;
2556 req.data[0] = 0xee;
2557 req.data[1] = 4;
2558 req.data[2] = 0;
2559 req.data[3] = 1;
2560 req.reply[0] = ADB_RET_OK;
2561 req.reply_len = 1;
2562 req.reply_expected = 0;
2563 pmu_polled_request(&req);
2564 mdelay(50);
2565 req.nbytes = 4;
2566 req.done = NULL;
2567 req.data[0] = 0xee;
2568 req.data[1] = 4;
2569 req.data[2] = 0;
2570 req.data[3] = 0;
2571 req.reply[0] = ADB_RET_OK;
2572 req.reply_len = 1;
2573 req.reply_expected = 0;
2574 pmu_polled_request(&req);
2575 mdelay(50);
2576 }
2577 mdelay(50);
2578}
2579#endif /* DEBUG_SLEEP */
2580
2581#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2582int pmu_sys_suspended;
2583
2584static int pmu_syscore_suspend(void)
2585{
2586 /* Suspend PMU event interrupts */
2587 pmu_suspend();
2588 pmu_sys_suspended = 1;
2589
2590#ifdef CONFIG_PMAC_BACKLIGHT
2591 /* Tell backlight code not to muck around with the chip anymore */
2592 pmu_backlight_set_sleep(1);
2593#endif
2594
2595 return 0;
2596}
2597
2598static void pmu_syscore_resume(void)
2599{
2600 struct adb_request req;
2601
2602 if (!pmu_sys_suspended)
2603 return;
2604
2605 /* Tell PMU we are ready */
2606 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2607 pmu_wait_complete(&req);
2608
2609#ifdef CONFIG_PMAC_BACKLIGHT
2610 /* Tell backlight code it can use the chip again */
2611 pmu_backlight_set_sleep(0);
2612#endif
2613 /* Resume PMU event interrupts */
2614 pmu_resume();
2615 pmu_sys_suspended = 0;
2616}
2617
2618static struct syscore_ops pmu_syscore_ops = {
2619 .suspend = pmu_syscore_suspend,
2620 .resume = pmu_syscore_resume,
2621};
2622
2623static int pmu_syscore_register(void)
2624{
2625 register_syscore_ops(&pmu_syscore_ops);
2626
2627 return 0;
2628}
2629subsys_initcall(pmu_syscore_register);
2630#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2631
2632EXPORT_SYMBOL(pmu_request);
2633EXPORT_SYMBOL(pmu_queue_request);
2634EXPORT_SYMBOL(pmu_poll);
2635EXPORT_SYMBOL(pmu_poll_adb);
2636EXPORT_SYMBOL(pmu_wait_complete);
2637EXPORT_SYMBOL(pmu_suspend);
2638EXPORT_SYMBOL(pmu_resume);
2639EXPORT_SYMBOL(pmu_unlock);
2640#if defined(CONFIG_PPC32)
2641EXPORT_SYMBOL(pmu_enable_irled);
2642EXPORT_SYMBOL(pmu_battery_count);
2643EXPORT_SYMBOL(pmu_batteries);
2644EXPORT_SYMBOL(pmu_power_flags);
2645#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2646