tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Device driver for the via-pmu on Apple Powermacs.
3 *
4 * The VIA (versatile interface adapter) interfaces to the PMU,
5 * a 6805 microprocessor core whose primary function is to control
6 * battery charging and system power on the PowerBook 3400 and 2400.
7 * The PMU also controls the ADB (Apple Desktop Bus) which connects
8 * to the keyboard and mouse, as well as the non-volatile RAM
9 * and the RTC (real time clock) chip.
10 *
11 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
12 * Copyright (C) 2001-2002 Benjamin Herrenschmidt
13 *
14 * THIS DRIVER IS BECOMING A TOTAL MESS !
15 * - Cleanup atomically disabling reply to PMU events after
16 * a sleep or a freq. switch
17 * - Move sleep code out of here to pmac_pm, merge into new
18 * common PM infrastructure
19 * - Save/Restore PCI space properly
20 *
21 */
22#include <stdarg.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.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/smp_lock.h>
37#include <linux/module.h>
38#include <linux/spinlock.h>
39#include <linux/pm.h>
40#include <linux/proc_fs.h>
41#include <linux/init.h>
42#include <linux/interrupt.h>
43#include <linux/device.h>
44#include <linux/sysdev.h>
45#include <linux/suspend.h>
46#include <linux/syscalls.h>
47#include <linux/cpu.h>
48#include <asm/prom.h>
49#include <asm/machdep.h>
50#include <asm/io.h>
51#include <asm/pgtable.h>
52#include <asm/system.h>
53#include <asm/sections.h>
54#include <asm/irq.h>
55#include <asm/pmac_feature.h>
56#include <asm/pmac_pfunc.h>
57#include <asm/pmac_low_i2c.h>
58#include <asm/uaccess.h>
59#include <asm/mmu_context.h>
60#include <asm/cputable.h>
61#include <asm/time.h>
62#include <asm/backlight.h>
63
64#include "via-pmu-event.h"
65
66/* Some compile options */
67#undef SUSPEND_USES_PMU
68#define DEBUG_SLEEP
69#undef HACKED_PCI_SAVE
70
71/* Misc minor number allocated for /dev/pmu */
72#define PMU_MINOR 154
73
74/* How many iterations between battery polls */
75#define BATTERY_POLLING_COUNT 2
76
77static volatile unsigned char __iomem *via;
78
79/* VIA registers - spaced 0x200 bytes apart */
80#define RS 0x200 /* skip between registers */
81#define B 0 /* B-side data */
82#define A RS /* A-side data */
83#define DIRB (2*RS) /* B-side direction (1=output) */
84#define DIRA (3*RS) /* A-side direction (1=output) */
85#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */
86#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */
87#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */
88#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */
89#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */
90#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */
91#define SR (10*RS) /* Shift register */
92#define ACR (11*RS) /* Auxiliary control register */
93#define PCR (12*RS) /* Peripheral control register */
94#define IFR (13*RS) /* Interrupt flag register */
95#define IER (14*RS) /* Interrupt enable register */
96#define ANH (15*RS) /* A-side data, no handshake */
97
98/* Bits in B data register: both active low */
99#define TACK 0x08 /* Transfer acknowledge (input) */
100#define TREQ 0x10 /* Transfer request (output) */
101
102/* Bits in ACR */
103#define SR_CTRL 0x1c /* Shift register control bits */
104#define SR_EXT 0x0c /* Shift on external clock */
105#define SR_OUT 0x10 /* Shift out if 1 */
106
107/* Bits in IFR and IER */
108#define IER_SET 0x80 /* set bits in IER */
109#define IER_CLR 0 /* clear bits in IER */
110#define SR_INT 0x04 /* Shift register full/empty */
111#define CB2_INT 0x08
112#define CB1_INT 0x10 /* transition on CB1 input */
113
114static volatile enum pmu_state {
115 idle,
116 sending,
117 intack,
118 reading,
119 reading_intr,
120 locked,
121} pmu_state;
122
123static volatile enum int_data_state {
124 int_data_empty,
125 int_data_fill,
126 int_data_ready,
127 int_data_flush
128} int_data_state[2] = { int_data_empty, int_data_empty };
129
130static struct adb_request *current_req;
131static struct adb_request *last_req;
132static struct adb_request *req_awaiting_reply;
133static unsigned char interrupt_data[2][32];
134static int interrupt_data_len[2];
135static int int_data_last;
136static unsigned char *reply_ptr;
137static int data_index;
138static int data_len;
139static volatile int adb_int_pending;
140static volatile int disable_poll;
141static struct device_node *vias;
142static int pmu_kind = PMU_UNKNOWN;
143static int pmu_fully_inited = 0;
144static int pmu_has_adb;
145static struct device_node *gpio_node;
146static unsigned char __iomem *gpio_reg = NULL;
147static int gpio_irq = NO_IRQ;
148static int gpio_irq_enabled = -1;
149static volatile int pmu_suspended = 0;
150static spinlock_t pmu_lock;
151static u8 pmu_intr_mask;
152static int pmu_version;
153static int drop_interrupts;
154#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
155static int option_lid_wakeup = 1;
156#endif /* CONFIG_PM && CONFIG_PPC32 */
157#if (defined(CONFIG_PM)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
158static int sleep_in_progress;
159#endif
160static unsigned long async_req_locks;
161static unsigned int pmu_irq_stats[11];
162
163static struct proc_dir_entry *proc_pmu_root;
164static struct proc_dir_entry *proc_pmu_info;
165static struct proc_dir_entry *proc_pmu_irqstats;
166static struct proc_dir_entry *proc_pmu_options;
167static int option_server_mode;
168
169int pmu_battery_count;
170int pmu_cur_battery;
171unsigned int pmu_power_flags;
172struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
173static int query_batt_timer = BATTERY_POLLING_COUNT;
174static struct adb_request batt_req;
175static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
176
177int __fake_sleep;
178int asleep;
179BLOCKING_NOTIFIER_HEAD(sleep_notifier_list);
180
181#ifdef CONFIG_ADB
182static int adb_dev_map = 0;
183static int pmu_adb_flags;
184
185static int pmu_probe(void);
186static int pmu_init(void);
187static int pmu_send_request(struct adb_request *req, int sync);
188static int pmu_adb_autopoll(int devs);
189static int pmu_adb_reset_bus(void);
190#endif /* CONFIG_ADB */
191
192static int init_pmu(void);
193static void pmu_start(void);
194static irqreturn_t via_pmu_interrupt(int irq, void *arg);
195static irqreturn_t gpio1_interrupt(int irq, void *arg);
196static int proc_get_info(char *page, char **start, off_t off,
197 int count, int *eof, void *data);
198static int proc_get_irqstats(char *page, char **start, off_t off,
199 int count, int *eof, void *data);
200static void pmu_pass_intr(unsigned char *data, int len);
201static int proc_get_batt(char *page, char **start, off_t off,
202 int count, int *eof, void *data);
203static int proc_read_options(char *page, char **start, off_t off,
204 int count, int *eof, void *data);
205static int proc_write_options(struct file *file, const char __user *buffer,
206 unsigned long count, void *data);
207
208#ifdef CONFIG_ADB
209struct adb_driver via_pmu_driver = {
210 "PMU",
211 pmu_probe,
212 pmu_init,
213 pmu_send_request,
214 pmu_adb_autopoll,
215 pmu_poll_adb,
216 pmu_adb_reset_bus
217};
218#endif /* CONFIG_ADB */
219
220extern void low_sleep_handler(void);
221extern void enable_kernel_altivec(void);
222extern void enable_kernel_fp(void);
223
224#ifdef DEBUG_SLEEP
225int pmu_polled_request(struct adb_request *req);
226int pmu_wink(struct adb_request *req);
227#endif
228
229/*
230 * This table indicates for each PMU opcode:
231 * - the number of data bytes to be sent with the command, or -1
232 * if a length byte should be sent,
233 * - the number of response bytes which the PMU will return, or
234 * -1 if it will send a length byte.
235 */
236static const s8 pmu_data_len[256][2] = {
237/* 0 1 2 3 4 5 6 7 */
238/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
239/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
240/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
241/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
242/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
243/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
244/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
245/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
246/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
247/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
248/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
249/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
250/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
251/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
252/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
253/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
254/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
255/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
256/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
257/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
258/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
259/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
260/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
261/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
262/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
263/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
264/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
265/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
266/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
267/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
268/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
269/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
270};
271
272static char *pbook_type[] = {
273 "Unknown PowerBook",
274 "PowerBook 2400/3400/3500(G3)",
275 "PowerBook G3 Series",
276 "1999 PowerBook G3",
277 "Core99"
278};
279
280int __init find_via_pmu(void)
281{
282 u64 taddr;
283 const u32 *reg;
284
285 if (via != 0)
286 return 1;
287 vias = of_find_node_by_name(NULL, "via-pmu");
288 if (vias == NULL)
289 return 0;
290
291 reg = get_property(vias, "reg", NULL);
292 if (reg == NULL) {
293 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
294 goto fail;
295 }
296 taddr = of_translate_address(vias, reg);
297 if (taddr == OF_BAD_ADDR) {
298 printk(KERN_ERR "via-pmu: Can't translate address !\n");
299 goto fail;
300 }
301
302 spin_lock_init(&pmu_lock);
303
304 pmu_has_adb = 1;
305
306 pmu_intr_mask = PMU_INT_PCEJECT |
307 PMU_INT_SNDBRT |
308 PMU_INT_ADB |
309 PMU_INT_TICK;
310
311 if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
312 || device_is_compatible(vias->parent, "ohare")))
313 pmu_kind = PMU_OHARE_BASED;
314 else if (device_is_compatible(vias->parent, "paddington"))
315 pmu_kind = PMU_PADDINGTON_BASED;
316 else if (device_is_compatible(vias->parent, "heathrow"))
317 pmu_kind = PMU_HEATHROW_BASED;
318 else if (device_is_compatible(vias->parent, "Keylargo")
319 || device_is_compatible(vias->parent, "K2-Keylargo")) {
320 struct device_node *gpiop;
321 u64 gaddr = OF_BAD_ADDR;
322
323 pmu_kind = PMU_KEYLARGO_BASED;
324 pmu_has_adb = (find_type_devices("adb") != NULL);
325 pmu_intr_mask = PMU_INT_PCEJECT |
326 PMU_INT_SNDBRT |
327 PMU_INT_ADB |
328 PMU_INT_TICK |
329 PMU_INT_ENVIRONMENT;
330
331 gpiop = of_find_node_by_name(NULL, "gpio");
332 if (gpiop) {
333 reg = get_property(gpiop, "reg", NULL);
334 if (reg)
335 gaddr = of_translate_address(gpiop, reg);
336 if (gaddr != OF_BAD_ADDR)
337 gpio_reg = ioremap(gaddr, 0x10);
338 }
339 if (gpio_reg == NULL) {
340 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
341 goto fail_gpio;
342 }
343 } else
344 pmu_kind = PMU_UNKNOWN;
345
346 via = ioremap(taddr, 0x2000);
347 if (via == NULL) {
348 printk(KERN_ERR "via-pmu: Can't map address !\n");
349 goto fail;
350 }
351
352 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
353 out_8(&via[IFR], 0x7f); /* clear IFR */
354
355 pmu_state = idle;
356
357 if (!init_pmu()) {
358 via = NULL;
359 return 0;
360 }
361
362 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
363 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
364
365 sys_ctrler = SYS_CTRLER_PMU;
366
367 return 1;
368 fail:
369 of_node_put(vias);
370 iounmap(gpio_reg);
371 gpio_reg = NULL;
372 fail_gpio:
373 vias = NULL;
374 return 0;
375}
376
377#ifdef CONFIG_ADB
378static int pmu_probe(void)
379{
380 return vias == NULL? -ENODEV: 0;
381}
382
383static int __init pmu_init(void)
384{
385 if (vias == NULL)
386 return -ENODEV;
387 return 0;
388}
389#endif /* CONFIG_ADB */
390
391/*
392 * We can't wait until pmu_init gets called, that happens too late.
393 * It happens after IDE and SCSI initialization, which can take a few
394 * seconds, and by that time the PMU could have given up on us and
395 * turned us off.
396 * Thus this is called with arch_initcall rather than device_initcall.
397 */
398static int __init via_pmu_start(void)
399{
400 unsigned int irq;
401
402 if (vias == NULL)
403 return -ENODEV;
404
405 batt_req.complete = 1;
406
407 irq = irq_of_parse_and_map(vias, 0);
408 if (irq == NO_IRQ) {
409 printk(KERN_ERR "via-pmu: can't map interruptn");
410 return -ENODEV;
411 }
412 if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
413 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
414 return -ENODEV;
415 }
416
417 if (pmu_kind == PMU_KEYLARGO_BASED) {
418 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
419 if (gpio_node == NULL)
420 gpio_node = of_find_node_by_name(NULL,
421 "pmu-interrupt");
422 if (gpio_node)
423 gpio_irq = irq_of_parse_and_map(gpio_node, 0);
424
425 if (gpio_irq != NO_IRQ) {
426 if (request_irq(gpio_irq, gpio1_interrupt, 0,
427 "GPIO1 ADB", (void *)0))
428 printk(KERN_ERR "pmu: can't get irq %d"
429 " (GPIO1)\n", gpio_irq);
430 else
431 gpio_irq_enabled = 1;
432 }
433 }
434
435 /* Enable interrupts */
436 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
437
438 pmu_fully_inited = 1;
439
440 /* Make sure PMU settle down before continuing. This is _very_ important
441 * since the IDE probe may shut interrupts down for quite a bit of time. If
442 * a PMU communication is pending while this happens, the PMU may timeout
443 * Not that on Core99 machines, the PMU keeps sending us environement
444 * messages, we should find a way to either fix IDE or make it call
445 * pmu_suspend() before masking interrupts. This can also happens while
446 * scolling with some fbdevs.
447 */
448 do {
449 pmu_poll();
450 } while (pmu_state != idle);
451
452 return 0;
453}
454
455arch_initcall(via_pmu_start);
456
457/*
458 * This has to be done after pci_init, which is a subsys_initcall.
459 */
460static int __init via_pmu_dev_init(void)
461{
462 if (vias == NULL)
463 return -ENODEV;
464
465#ifdef CONFIG_PMAC_BACKLIGHT
466 /* Initialize backlight */
467 pmu_backlight_init();
468#endif
469
470#ifdef CONFIG_PPC32
471 if (machine_is_compatible("AAPL,3400/2400") ||
472 machine_is_compatible("AAPL,3500")) {
473 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
474 NULL, PMAC_MB_INFO_MODEL, 0);
475 pmu_battery_count = 1;
476 if (mb == PMAC_TYPE_COMET)
477 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
478 else
479 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
480 } else if (machine_is_compatible("AAPL,PowerBook1998") ||
481 machine_is_compatible("PowerBook1,1")) {
482 pmu_battery_count = 2;
483 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
484 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
485 } else {
486 struct device_node* prim = find_devices("power-mgt");
487 const u32 *prim_info = NULL;
488 if (prim)
489 prim_info = get_property(prim, "prim-info", NULL);
490 if (prim_info) {
491 /* Other stuffs here yet unknown */
492 pmu_battery_count = (prim_info[6] >> 16) & 0xff;
493 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
494 if (pmu_battery_count > 1)
495 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
496 }
497 }
498#endif /* CONFIG_PPC32 */
499
500 /* Create /proc/pmu */
501 proc_pmu_root = proc_mkdir("pmu", NULL);
502 if (proc_pmu_root) {
503 long i;
504
505 for (i=0; i<pmu_battery_count; i++) {
506 char title[16];
507 sprintf(title, "battery_%ld", i);
508 proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
509 proc_get_batt, (void *)i);
510 }
511
512 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
513 proc_get_info, NULL);
514 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
515 proc_get_irqstats, NULL);
516 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
517 if (proc_pmu_options) {
518 proc_pmu_options->nlink = 1;
519 proc_pmu_options->read_proc = proc_read_options;
520 proc_pmu_options->write_proc = proc_write_options;
521 }
522 }
523 return 0;
524}
525
526device_initcall(via_pmu_dev_init);
527
528static int
529init_pmu(void)
530{
531 int timeout;
532 struct adb_request req;
533
534 out_8(&via[B], via[B] | TREQ); /* negate TREQ */
535 out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK); /* TACK in, TREQ out */
536
537 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
538 timeout = 100000;
539 while (!req.complete) {
540 if (--timeout < 0) {
541 printk(KERN_ERR "init_pmu: no response from PMU\n");
542 return 0;
543 }
544 udelay(10);
545 pmu_poll();
546 }
547
548 /* ack all pending interrupts */
549 timeout = 100000;
550 interrupt_data[0][0] = 1;
551 while (interrupt_data[0][0] || pmu_state != idle) {
552 if (--timeout < 0) {
553 printk(KERN_ERR "init_pmu: timed out acking intrs\n");
554 return 0;
555 }
556 if (pmu_state == idle)
557 adb_int_pending = 1;
558 via_pmu_interrupt(0, NULL);
559 udelay(10);
560 }
561
562 /* Tell PMU we are ready. */
563 if (pmu_kind == PMU_KEYLARGO_BASED) {
564 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
565 while (!req.complete)
566 pmu_poll();
567 }
568
569 /* Read PMU version */
570 pmu_request(&req, NULL, 1, PMU_GET_VERSION);
571 pmu_wait_complete(&req);
572 if (req.reply_len > 0)
573 pmu_version = req.reply[0];
574
575 /* Read server mode setting */
576 if (pmu_kind == PMU_KEYLARGO_BASED) {
577 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
578 PMU_PWR_GET_POWERUP_EVENTS);
579 pmu_wait_complete(&req);
580 if (req.reply_len == 2) {
581 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
582 option_server_mode = 1;
583 printk(KERN_INFO "via-pmu: Server Mode is %s\n",
584 option_server_mode ? "enabled" : "disabled");
585 }
586 }
587 return 1;
588}
589
590int
591pmu_get_model(void)
592{
593 return pmu_kind;
594}
595
596static void pmu_set_server_mode(int server_mode)
597{
598 struct adb_request req;
599
600 if (pmu_kind != PMU_KEYLARGO_BASED)
601 return;
602
603 option_server_mode = server_mode;
604 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
605 pmu_wait_complete(&req);
606 if (req.reply_len < 2)
607 return;
608 if (server_mode)
609 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
610 PMU_PWR_SET_POWERUP_EVENTS,
611 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
612 else
613 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
614 PMU_PWR_CLR_POWERUP_EVENTS,
615 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
616 pmu_wait_complete(&req);
617}
618
619/* This new version of the code for 2400/3400/3500 powerbooks
620 * is inspired from the implementation in gkrellm-pmu
621 */
622static void
623done_battery_state_ohare(struct adb_request* req)
624{
625 /* format:
626 * [0] : flags
627 * 0x01 : AC indicator
628 * 0x02 : charging
629 * 0x04 : battery exist
630 * 0x08 :
631 * 0x10 :
632 * 0x20 : full charged
633 * 0x40 : pcharge reset
634 * 0x80 : battery exist
635 *
636 * [1][2] : battery voltage
637 * [3] : CPU temperature
638 * [4] : battery temperature
639 * [5] : current
640 * [6][7] : pcharge
641 * --tkoba
642 */
643 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
644 long pcharge, charge, vb, vmax, lmax;
645 long vmax_charging, vmax_charged;
646 long amperage, voltage, time, max;
647 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
648 NULL, PMAC_MB_INFO_MODEL, 0);
649
650 if (req->reply[0] & 0x01)
651 pmu_power_flags |= PMU_PWR_AC_PRESENT;
652 else
653 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
654
655 if (mb == PMAC_TYPE_COMET) {
656 vmax_charged = 189;
657 vmax_charging = 213;
658 lmax = 6500;
659 } else {
660 vmax_charged = 330;
661 vmax_charging = 330;
662 lmax = 6500;
663 }
664 vmax = vmax_charged;
665
666 /* If battery installed */
667 if (req->reply[0] & 0x04) {
668 bat_flags |= PMU_BATT_PRESENT;
669 if (req->reply[0] & 0x02)
670 bat_flags |= PMU_BATT_CHARGING;
671 vb = (req->reply[1] << 8) | req->reply[2];
672 voltage = (vb * 265 + 72665) / 10;
673 amperage = req->reply[5];
674 if ((req->reply[0] & 0x01) == 0) {
675 if (amperage > 200)
676 vb += ((amperage - 200) * 15)/100;
677 } else if (req->reply[0] & 0x02) {
678 vb = (vb * 97) / 100;
679 vmax = vmax_charging;
680 }
681 charge = (100 * vb) / vmax;
682 if (req->reply[0] & 0x40) {
683 pcharge = (req->reply[6] << 8) + req->reply[7];
684 if (pcharge > lmax)
685 pcharge = lmax;
686 pcharge *= 100;
687 pcharge = 100 - pcharge / lmax;
688 if (pcharge < charge)
689 charge = pcharge;
690 }
691 if (amperage > 0)
692 time = (charge * 16440) / amperage;
693 else
694 time = 0;
695 max = 100;
696 amperage = -amperage;
697 } else
698 charge = max = amperage = voltage = time = 0;
699
700 pmu_batteries[pmu_cur_battery].flags = bat_flags;
701 pmu_batteries[pmu_cur_battery].charge = charge;
702 pmu_batteries[pmu_cur_battery].max_charge = max;
703 pmu_batteries[pmu_cur_battery].amperage = amperage;
704 pmu_batteries[pmu_cur_battery].voltage = voltage;
705 pmu_batteries[pmu_cur_battery].time_remaining = time;
706
707 clear_bit(0, &async_req_locks);
708}
709
710static void
711done_battery_state_smart(struct adb_request* req)
712{
713 /* format:
714 * [0] : format of this structure (known: 3,4,5)
715 * [1] : flags
716 *
717 * format 3 & 4:
718 *
719 * [2] : charge
720 * [3] : max charge
721 * [4] : current
722 * [5] : voltage
723 *
724 * format 5:
725 *
726 * [2][3] : charge
727 * [4][5] : max charge
728 * [6][7] : current
729 * [8][9] : voltage
730 */
731
732 unsigned int bat_flags = PMU_BATT_TYPE_SMART;
733 int amperage;
734 unsigned int capa, max, voltage;
735
736 if (req->reply[1] & 0x01)
737 pmu_power_flags |= PMU_PWR_AC_PRESENT;
738 else
739 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
740
741
742 capa = max = amperage = voltage = 0;
743
744 if (req->reply[1] & 0x04) {
745 bat_flags |= PMU_BATT_PRESENT;
746 switch(req->reply[0]) {
747 case 3:
748 case 4: capa = req->reply[2];
749 max = req->reply[3];
750 amperage = *((signed char *)&req->reply[4]);
751 voltage = req->reply[5];
752 break;
753 case 5: capa = (req->reply[2] << 8) | req->reply[3];
754 max = (req->reply[4] << 8) | req->reply[5];
755 amperage = *((signed short *)&req->reply[6]);
756 voltage = (req->reply[8] << 8) | req->reply[9];
757 break;
758 default:
759 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
760 req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
761 break;
762 }
763 }
764
765 if ((req->reply[1] & 0x01) && (amperage > 0))
766 bat_flags |= PMU_BATT_CHARGING;
767
768 pmu_batteries[pmu_cur_battery].flags = bat_flags;
769 pmu_batteries[pmu_cur_battery].charge = capa;
770 pmu_batteries[pmu_cur_battery].max_charge = max;
771 pmu_batteries[pmu_cur_battery].amperage = amperage;
772 pmu_batteries[pmu_cur_battery].voltage = voltage;
773 if (amperage) {
774 if ((req->reply[1] & 0x01) && (amperage > 0))
775 pmu_batteries[pmu_cur_battery].time_remaining
776 = ((max-capa) * 3600) / amperage;
777 else
778 pmu_batteries[pmu_cur_battery].time_remaining
779 = (capa * 3600) / (-amperage);
780 } else
781 pmu_batteries[pmu_cur_battery].time_remaining = 0;
782
783 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
784
785 clear_bit(0, &async_req_locks);
786}
787
788static void
789query_battery_state(void)
790{
791 if (test_and_set_bit(0, &async_req_locks))
792 return;
793 if (pmu_kind == PMU_OHARE_BASED)
794 pmu_request(&batt_req, done_battery_state_ohare,
795 1, PMU_BATTERY_STATE);
796 else
797 pmu_request(&batt_req, done_battery_state_smart,
798 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
799}
800
801static int
802proc_get_info(char *page, char **start, off_t off,
803 int count, int *eof, void *data)
804{
805 char* p = page;
806
807 p += sprintf(p, "PMU driver version : %d\n", PMU_DRIVER_VERSION);
808 p += sprintf(p, "PMU firmware version : %02x\n", pmu_version);
809 p += sprintf(p, "AC Power : %d\n",
810 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
811 p += sprintf(p, "Battery count : %d\n", pmu_battery_count);
812
813 return p - page;
814}
815
816static int
817proc_get_irqstats(char *page, char **start, off_t off,
818 int count, int *eof, void *data)
819{
820 int i;
821 char* p = page;
822 static const char *irq_names[] = {
823 "Total CB1 triggered events",
824 "Total GPIO1 triggered events",
825 "PC-Card eject button",
826 "Sound/Brightness button",
827 "ADB message",
828 "Battery state change",
829 "Environment interrupt",
830 "Tick timer",
831 "Ghost interrupt (zero len)",
832 "Empty interrupt (empty mask)",
833 "Max irqs in a row"
834 };
835
836 for (i=0; i<11; i++) {
837 p += sprintf(p, " %2u: %10u (%s)\n",
838 i, pmu_irq_stats[i], irq_names[i]);
839 }
840 return p - page;
841}
842
843static int
844proc_get_batt(char *page, char **start, off_t off,
845 int count, int *eof, void *data)
846{
847 long batnum = (long)data;
848 char *p = page;
849
850 p += sprintf(p, "\n");
851 p += sprintf(p, "flags : %08x\n",
852 pmu_batteries[batnum].flags);
853 p += sprintf(p, "charge : %d\n",
854 pmu_batteries[batnum].charge);
855 p += sprintf(p, "max_charge : %d\n",
856 pmu_batteries[batnum].max_charge);
857 p += sprintf(p, "current : %d\n",
858 pmu_batteries[batnum].amperage);
859 p += sprintf(p, "voltage : %d\n",
860 pmu_batteries[batnum].voltage);
861 p += sprintf(p, "time rem. : %d\n",
862 pmu_batteries[batnum].time_remaining);
863
864 return p - page;
865}
866
867static int
868proc_read_options(char *page, char **start, off_t off,
869 int count, int *eof, void *data)
870{
871 char *p = page;
872
873#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
874 if (pmu_kind == PMU_KEYLARGO_BASED &&
875 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
876 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
877#endif
878 if (pmu_kind == PMU_KEYLARGO_BASED)
879 p += sprintf(p, "server_mode=%d\n", option_server_mode);
880
881 return p - page;
882}
883
884static int
885proc_write_options(struct file *file, const char __user *buffer,
886 unsigned long count, void *data)
887{
888 char tmp[33];
889 char *label, *val;
890 unsigned long fcount = count;
891
892 if (!count)
893 return -EINVAL;
894 if (count > 32)
895 count = 32;
896 if (copy_from_user(tmp, buffer, count))
897 return -EFAULT;
898 tmp[count] = 0;
899
900 label = tmp;
901 while(*label == ' ')
902 label++;
903 val = label;
904 while(*val && (*val != '=')) {
905 if (*val == ' ')
906 *val = 0;
907 val++;
908 }
909 if ((*val) == 0)
910 return -EINVAL;
911 *(val++) = 0;
912 while(*val == ' ')
913 val++;
914#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
915 if (pmu_kind == PMU_KEYLARGO_BASED &&
916 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
917 if (!strcmp(label, "lid_wakeup"))
918 option_lid_wakeup = ((*val) == '1');
919#endif
920 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
921 int new_value;
922 new_value = ((*val) == '1');
923 if (new_value != option_server_mode)
924 pmu_set_server_mode(new_value);
925 }
926 return fcount;
927}
928
929#ifdef CONFIG_ADB
930/* Send an ADB command */
931static int
932pmu_send_request(struct adb_request *req, int sync)
933{
934 int i, ret;
935
936 if ((vias == NULL) || (!pmu_fully_inited)) {
937 req->complete = 1;
938 return -ENXIO;
939 }
940
941 ret = -EINVAL;
942
943 switch (req->data[0]) {
944 case PMU_PACKET:
945 for (i = 0; i < req->nbytes - 1; ++i)
946 req->data[i] = req->data[i+1];
947 --req->nbytes;
948 if (pmu_data_len[req->data[0]][1] != 0) {
949 req->reply[0] = ADB_RET_OK;
950 req->reply_len = 1;
951 } else
952 req->reply_len = 0;
953 ret = pmu_queue_request(req);
954 break;
955 case CUDA_PACKET:
956 switch (req->data[1]) {
957 case CUDA_GET_TIME:
958 if (req->nbytes != 2)
959 break;
960 req->data[0] = PMU_READ_RTC;
961 req->nbytes = 1;
962 req->reply_len = 3;
963 req->reply[0] = CUDA_PACKET;
964 req->reply[1] = 0;
965 req->reply[2] = CUDA_GET_TIME;
966 ret = pmu_queue_request(req);
967 break;
968 case CUDA_SET_TIME:
969 if (req->nbytes != 6)
970 break;
971 req->data[0] = PMU_SET_RTC;
972 req->nbytes = 5;
973 for (i = 1; i <= 4; ++i)
974 req->data[i] = req->data[i+1];
975 req->reply_len = 3;
976 req->reply[0] = CUDA_PACKET;
977 req->reply[1] = 0;
978 req->reply[2] = CUDA_SET_TIME;
979 ret = pmu_queue_request(req);
980 break;
981 }
982 break;
983 case ADB_PACKET:
984 if (!pmu_has_adb)
985 return -ENXIO;
986 for (i = req->nbytes - 1; i > 1; --i)
987 req->data[i+2] = req->data[i];
988 req->data[3] = req->nbytes - 2;
989 req->data[2] = pmu_adb_flags;
990 /*req->data[1] = req->data[1];*/
991 req->data[0] = PMU_ADB_CMD;
992 req->nbytes += 2;
993 req->reply_expected = 1;
994 req->reply_len = 0;
995 ret = pmu_queue_request(req);
996 break;
997 }
998 if (ret) {
999 req->complete = 1;
1000 return ret;
1001 }
1002
1003 if (sync)
1004 while (!req->complete)
1005 pmu_poll();
1006
1007 return 0;
1008}
1009
1010/* Enable/disable autopolling */
1011static int
1012pmu_adb_autopoll(int devs)
1013{
1014 struct adb_request req;
1015
1016 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1017 return -ENXIO;
1018
1019 if (devs) {
1020 adb_dev_map = devs;
1021 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1022 adb_dev_map >> 8, adb_dev_map);
1023 pmu_adb_flags = 2;
1024 } else {
1025 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1026 pmu_adb_flags = 0;
1027 }
1028 while (!req.complete)
1029 pmu_poll();
1030 return 0;
1031}
1032
1033/* Reset the ADB bus */
1034static int
1035pmu_adb_reset_bus(void)
1036{
1037 struct adb_request req;
1038 int save_autopoll = adb_dev_map;
1039
1040 if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1041 return -ENXIO;
1042
1043 /* anyone got a better idea?? */
1044 pmu_adb_autopoll(0);
1045
1046 req.nbytes = 5;
1047 req.done = NULL;
1048 req.data[0] = PMU_ADB_CMD;
1049 req.data[1] = 0;
1050 req.data[2] = ADB_BUSRESET;
1051 req.data[3] = 0;
1052 req.data[4] = 0;
1053 req.reply_len = 0;
1054 req.reply_expected = 1;
1055 if (pmu_queue_request(&req) != 0) {
1056 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1057 return -EIO;
1058 }
1059 pmu_wait_complete(&req);
1060
1061 if (save_autopoll != 0)
1062 pmu_adb_autopoll(save_autopoll);
1063
1064 return 0;
1065}
1066#endif /* CONFIG_ADB */
1067
1068/* Construct and send a pmu request */
1069int
1070pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1071 int nbytes, ...)
1072{
1073 va_list list;
1074 int i;
1075
1076 if (vias == NULL)
1077 return -ENXIO;
1078
1079 if (nbytes < 0 || nbytes > 32) {
1080 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1081 req->complete = 1;
1082 return -EINVAL;
1083 }
1084 req->nbytes = nbytes;
1085 req->done = done;
1086 va_start(list, nbytes);
1087 for (i = 0; i < nbytes; ++i)
1088 req->data[i] = va_arg(list, int);
1089 va_end(list);
1090 req->reply_len = 0;
1091 req->reply_expected = 0;
1092 return pmu_queue_request(req);
1093}
1094
1095int
1096pmu_queue_request(struct adb_request *req)
1097{
1098 unsigned long flags;
1099 int nsend;
1100
1101 if (via == NULL) {
1102 req->complete = 1;
1103 return -ENXIO;
1104 }
1105 if (req->nbytes <= 0) {
1106 req->complete = 1;
1107 return 0;
1108 }
1109 nsend = pmu_data_len[req->data[0]][0];
1110 if (nsend >= 0 && req->nbytes != nsend + 1) {
1111 req->complete = 1;
1112 return -EINVAL;
1113 }
1114
1115 req->next = NULL;
1116 req->sent = 0;
1117 req->complete = 0;
1118
1119 spin_lock_irqsave(&pmu_lock, flags);
1120 if (current_req != 0) {
1121 last_req->next = req;
1122 last_req = req;
1123 } else {
1124 current_req = req;
1125 last_req = req;
1126 if (pmu_state == idle)
1127 pmu_start();
1128 }
1129 spin_unlock_irqrestore(&pmu_lock, flags);
1130
1131 return 0;
1132}
1133
1134static inline void
1135wait_for_ack(void)
1136{
1137 /* Sightly increased the delay, I had one occurrence of the message
1138 * reported
1139 */
1140 int timeout = 4000;
1141 while ((in_8(&via[B]) & TACK) == 0) {
1142 if (--timeout < 0) {
1143 printk(KERN_ERR "PMU not responding (!ack)\n");
1144 return;
1145 }
1146 udelay(10);
1147 }
1148}
1149
1150/* New PMU seems to be very sensitive to those timings, so we make sure
1151 * PCI is flushed immediately */
1152static inline void
1153send_byte(int x)
1154{
1155 volatile unsigned char __iomem *v = via;
1156
1157 out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1158 out_8(&v[SR], x);
1159 out_8(&v[B], in_8(&v[B]) & ~TREQ); /* assert TREQ */
1160 (void)in_8(&v[B]);
1161}
1162
1163static inline void
1164recv_byte(void)
1165{
1166 volatile unsigned char __iomem *v = via;
1167
1168 out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1169 in_8(&v[SR]); /* resets SR */
1170 out_8(&v[B], in_8(&v[B]) & ~TREQ);
1171 (void)in_8(&v[B]);
1172}
1173
1174static inline void
1175pmu_done(struct adb_request *req)
1176{
1177 void (*done)(struct adb_request *) = req->done;
1178 mb();
1179 req->complete = 1;
1180 /* Here, we assume that if the request has a done member, the
1181 * struct request will survive to setting req->complete to 1
1182 */
1183 if (done)
1184 (*done)(req);
1185}
1186
1187static void
1188pmu_start(void)
1189{
1190 struct adb_request *req;
1191
1192 /* assert pmu_state == idle */
1193 /* get the packet to send */
1194 req = current_req;
1195 if (req == 0 || pmu_state != idle
1196 || (/*req->reply_expected && */req_awaiting_reply))
1197 return;
1198
1199 pmu_state = sending;
1200 data_index = 1;
1201 data_len = pmu_data_len[req->data[0]][0];
1202
1203 /* Sounds safer to make sure ACK is high before writing. This helped
1204 * kill a problem with ADB and some iBooks
1205 */
1206 wait_for_ack();
1207 /* set the shift register to shift out and send a byte */
1208 send_byte(req->data[0]);
1209}
1210
1211void
1212pmu_poll(void)
1213{
1214 if (!via)
1215 return;
1216 if (disable_poll)
1217 return;
1218 via_pmu_interrupt(0, NULL);
1219}
1220
1221void
1222pmu_poll_adb(void)
1223{
1224 if (!via)
1225 return;
1226 if (disable_poll)
1227 return;
1228 /* Kicks ADB read when PMU is suspended */
1229 adb_int_pending = 1;
1230 do {
1231 via_pmu_interrupt(0, NULL);
1232 } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1233 || req_awaiting_reply));
1234}
1235
1236void
1237pmu_wait_complete(struct adb_request *req)
1238{
1239 if (!via)
1240 return;
1241 while((pmu_state != idle && pmu_state != locked) || !req->complete)
1242 via_pmu_interrupt(0, NULL);
1243}
1244
1245/* This function loops until the PMU is idle and prevents it from
1246 * anwsering to ADB interrupts. pmu_request can still be called.
1247 * This is done to avoid spurrious shutdowns when we know we'll have
1248 * interrupts switched off for a long time
1249 */
1250void
1251pmu_suspend(void)
1252{
1253 unsigned long flags;
1254#ifdef SUSPEND_USES_PMU
1255 struct adb_request *req;
1256#endif
1257 if (!via)
1258 return;
1259
1260 spin_lock_irqsave(&pmu_lock, flags);
1261 pmu_suspended++;
1262 if (pmu_suspended > 1) {
1263 spin_unlock_irqrestore(&pmu_lock, flags);
1264 return;
1265 }
1266
1267 do {
1268 spin_unlock_irqrestore(&pmu_lock, flags);
1269 if (req_awaiting_reply)
1270 adb_int_pending = 1;
1271 via_pmu_interrupt(0, NULL);
1272 spin_lock_irqsave(&pmu_lock, flags);
1273 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1274#ifdef SUSPEND_USES_PMU
1275 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1276 spin_unlock_irqrestore(&pmu_lock, flags);
1277 while(!req.complete)
1278 pmu_poll();
1279#else /* SUSPEND_USES_PMU */
1280 if (gpio_irq >= 0)
1281 disable_irq_nosync(gpio_irq);
1282 out_8(&via[IER], CB1_INT | IER_CLR);
1283 spin_unlock_irqrestore(&pmu_lock, flags);
1284#endif /* SUSPEND_USES_PMU */
1285 break;
1286 }
1287 } while (1);
1288}
1289
1290void
1291pmu_resume(void)
1292{
1293 unsigned long flags;
1294
1295 if (!via || (pmu_suspended < 1))
1296 return;
1297
1298 spin_lock_irqsave(&pmu_lock, flags);
1299 pmu_suspended--;
1300 if (pmu_suspended > 0) {
1301 spin_unlock_irqrestore(&pmu_lock, flags);
1302 return;
1303 }
1304 adb_int_pending = 1;
1305#ifdef SUSPEND_USES_PMU
1306 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1307 spin_unlock_irqrestore(&pmu_lock, flags);
1308 while(!req.complete)
1309 pmu_poll();
1310#else /* SUSPEND_USES_PMU */
1311 if (gpio_irq >= 0)
1312 enable_irq(gpio_irq);
1313 out_8(&via[IER], CB1_INT | IER_SET);
1314 spin_unlock_irqrestore(&pmu_lock, flags);
1315 pmu_poll();
1316#endif /* SUSPEND_USES_PMU */
1317}
1318
1319/* Interrupt data could be the result data from an ADB cmd */
1320static void
1321pmu_handle_data(unsigned char *data, int len)
1322{
1323 unsigned char ints, pirq;
1324 int i = 0;
1325
1326 asleep = 0;
1327 if (drop_interrupts || len < 1) {
1328 adb_int_pending = 0;
1329 pmu_irq_stats[8]++;
1330 return;
1331 }
1332
1333 /* Get PMU interrupt mask */
1334 ints = data[0];
1335
1336 /* Record zero interrupts for stats */
1337 if (ints == 0)
1338 pmu_irq_stats[9]++;
1339
1340 /* Hack to deal with ADB autopoll flag */
1341 if (ints & PMU_INT_ADB)
1342 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1343
1344next:
1345
1346 if (ints == 0) {
1347 if (i > pmu_irq_stats[10])
1348 pmu_irq_stats[10] = i;
1349 return;
1350 }
1351
1352 for (pirq = 0; pirq < 8; pirq++)
1353 if (ints & (1 << pirq))
1354 break;
1355 pmu_irq_stats[pirq]++;
1356 i++;
1357 ints &= ~(1 << pirq);
1358
1359 /* Note: for some reason, we get an interrupt with len=1,
1360 * data[0]==0 after each normal ADB interrupt, at least
1361 * on the Pismo. Still investigating... --BenH
1362 */
1363 if ((1 << pirq) & PMU_INT_ADB) {
1364 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1365 struct adb_request *req = req_awaiting_reply;
1366 if (req == 0) {
1367 printk(KERN_ERR "PMU: extra ADB reply\n");
1368 return;
1369 }
1370 req_awaiting_reply = NULL;
1371 if (len <= 2)
1372 req->reply_len = 0;
1373 else {
1374 memcpy(req->reply, data + 1, len - 1);
1375 req->reply_len = len - 1;
1376 }
1377 pmu_done(req);
1378 } else {
1379 if (len == 4 && data[1] == 0x2c) {
1380 extern int xmon_wants_key, xmon_adb_keycode;
1381 if (xmon_wants_key) {
1382 xmon_adb_keycode = data[2];
1383 return;
1384 }
1385 }
1386#ifdef CONFIG_ADB
1387 /*
1388 * XXX On the [23]400 the PMU gives us an up
1389 * event for keycodes 0x74 or 0x75 when the PC
1390 * card eject buttons are released, so we
1391 * ignore those events.
1392 */
1393 if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1394 && data[1] == 0x2c && data[3] == 0xff
1395 && (data[2] & ~1) == 0xf4))
1396 adb_input(data+1, len-1, 1);
1397#endif /* CONFIG_ADB */
1398 }
1399 }
1400 /* Sound/brightness button pressed */
1401 else if ((1 << pirq) & PMU_INT_SNDBRT) {
1402#ifdef CONFIG_PMAC_BACKLIGHT
1403 if (len == 3)
1404 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1405#endif
1406 }
1407 /* Tick interrupt */
1408 else if ((1 << pirq) & PMU_INT_TICK) {
1409 /* Environement or tick interrupt, query batteries */
1410 if (pmu_battery_count) {
1411 if ((--query_batt_timer) == 0) {
1412 query_battery_state();
1413 query_batt_timer = BATTERY_POLLING_COUNT;
1414 }
1415 }
1416 }
1417 else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1418 if (pmu_battery_count)
1419 query_battery_state();
1420 pmu_pass_intr(data, len);
1421 /* len == 6 is probably a bad check. But how do I
1422 * know what PMU versions send what events here? */
1423 if (len == 6) {
1424 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1425 via_pmu_event(PMU_EVT_LID, data[1]&1);
1426 }
1427 } else {
1428 pmu_pass_intr(data, len);
1429 }
1430 goto next;
1431}
1432
1433static struct adb_request*
1434pmu_sr_intr(void)
1435{
1436 struct adb_request *req;
1437 int bite = 0;
1438
1439 if (via[B] & TREQ) {
1440 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1441 out_8(&via[IFR], SR_INT);
1442 return NULL;
1443 }
1444 /* The ack may not yet be low when we get the interrupt */
1445 while ((in_8(&via[B]) & TACK) != 0)
1446 ;
1447
1448 /* if reading grab the byte, and reset the interrupt */
1449 if (pmu_state == reading || pmu_state == reading_intr)
1450 bite = in_8(&via[SR]);
1451
1452 /* reset TREQ and wait for TACK to go high */
1453 out_8(&via[B], in_8(&via[B]) | TREQ);
1454 wait_for_ack();
1455
1456 switch (pmu_state) {
1457 case sending:
1458 req = current_req;
1459 if (data_len < 0) {
1460 data_len = req->nbytes - 1;
1461 send_byte(data_len);
1462 break;
1463 }
1464 if (data_index <= data_len) {
1465 send_byte(req->data[data_index++]);
1466 break;
1467 }
1468 req->sent = 1;
1469 data_len = pmu_data_len[req->data[0]][1];
1470 if (data_len == 0) {
1471 pmu_state = idle;
1472 current_req = req->next;
1473 if (req->reply_expected)
1474 req_awaiting_reply = req;
1475 else
1476 return req;
1477 } else {
1478 pmu_state = reading;
1479 data_index = 0;
1480 reply_ptr = req->reply + req->reply_len;
1481 recv_byte();
1482 }
1483 break;
1484
1485 case intack:
1486 data_index = 0;
1487 data_len = -1;
1488 pmu_state = reading_intr;
1489 reply_ptr = interrupt_data[int_data_last];
1490 recv_byte();
1491 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1492 enable_irq(gpio_irq);
1493 gpio_irq_enabled = 1;
1494 }
1495 break;
1496
1497 case reading:
1498 case reading_intr:
1499 if (data_len == -1) {
1500 data_len = bite;
1501 if (bite > 32)
1502 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1503 } else if (data_index < 32) {
1504 reply_ptr[data_index++] = bite;
1505 }
1506 if (data_index < data_len) {
1507 recv_byte();
1508 break;
1509 }
1510
1511 if (pmu_state == reading_intr) {
1512 pmu_state = idle;
1513 int_data_state[int_data_last] = int_data_ready;
1514 interrupt_data_len[int_data_last] = data_len;
1515 } else {
1516 req = current_req;
1517 /*
1518 * For PMU sleep and freq change requests, we lock the
1519 * PMU until it's explicitely unlocked. This avoids any
1520 * spurrious event polling getting in
1521 */
1522 current_req = req->next;
1523 req->reply_len += data_index;
1524 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1525 pmu_state = locked;
1526 else
1527 pmu_state = idle;
1528 return req;
1529 }
1530 break;
1531
1532 default:
1533 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1534 pmu_state);
1535 }
1536 return NULL;
1537}
1538
1539static irqreturn_t
1540via_pmu_interrupt(int irq, void *arg)
1541{
1542 unsigned long flags;
1543 int intr;
1544 int nloop = 0;
1545 int int_data = -1;
1546 struct adb_request *req = NULL;
1547 int handled = 0;
1548
1549 /* This is a bit brutal, we can probably do better */
1550 spin_lock_irqsave(&pmu_lock, flags);
1551 ++disable_poll;
1552
1553 for (;;) {
1554 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1555 if (intr == 0)
1556 break;
1557 handled = 1;
1558 if (++nloop > 1000) {
1559 printk(KERN_DEBUG "PMU: stuck in intr loop, "
1560 "intr=%x, ier=%x pmu_state=%d\n",
1561 intr, in_8(&via[IER]), pmu_state);
1562 break;
1563 }
1564 out_8(&via[IFR], intr);
1565 if (intr & CB1_INT) {
1566 adb_int_pending = 1;
1567 pmu_irq_stats[0]++;
1568 }
1569 if (intr & SR_INT) {
1570 req = pmu_sr_intr();
1571 if (req)
1572 break;
1573 }
1574 }
1575
1576recheck:
1577 if (pmu_state == idle) {
1578 if (adb_int_pending) {
1579 if (int_data_state[0] == int_data_empty)
1580 int_data_last = 0;
1581 else if (int_data_state[1] == int_data_empty)
1582 int_data_last = 1;
1583 else
1584 goto no_free_slot;
1585 pmu_state = intack;
1586 int_data_state[int_data_last] = int_data_fill;
1587 /* Sounds safer to make sure ACK is high before writing.
1588 * This helped kill a problem with ADB and some iBooks
1589 */
1590 wait_for_ack();
1591 send_byte(PMU_INT_ACK);
1592 adb_int_pending = 0;
1593 } else if (current_req)
1594 pmu_start();
1595 }
1596no_free_slot:
1597 /* Mark the oldest buffer for flushing */
1598 if (int_data_state[!int_data_last] == int_data_ready) {
1599 int_data_state[!int_data_last] = int_data_flush;
1600 int_data = !int_data_last;
1601 } else if (int_data_state[int_data_last] == int_data_ready) {
1602 int_data_state[int_data_last] = int_data_flush;
1603 int_data = int_data_last;
1604 }
1605 --disable_poll;
1606 spin_unlock_irqrestore(&pmu_lock, flags);
1607
1608 /* Deal with completed PMU requests outside of the lock */
1609 if (req) {
1610 pmu_done(req);
1611 req = NULL;
1612 }
1613
1614 /* Deal with interrupt datas outside of the lock */
1615 if (int_data >= 0) {
1616 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1617 spin_lock_irqsave(&pmu_lock, flags);
1618 ++disable_poll;
1619 int_data_state[int_data] = int_data_empty;
1620 int_data = -1;
1621 goto recheck;
1622 }
1623
1624 return IRQ_RETVAL(handled);
1625}
1626
1627void
1628pmu_unlock(void)
1629{
1630 unsigned long flags;
1631
1632 spin_lock_irqsave(&pmu_lock, flags);
1633 if (pmu_state == locked)
1634 pmu_state = idle;
1635 adb_int_pending = 1;
1636 spin_unlock_irqrestore(&pmu_lock, flags);
1637}
1638
1639
1640static irqreturn_t
1641gpio1_interrupt(int irq, void *arg)
1642{
1643 unsigned long flags;
1644
1645 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1646 spin_lock_irqsave(&pmu_lock, flags);
1647 if (gpio_irq_enabled > 0) {
1648 disable_irq_nosync(gpio_irq);
1649 gpio_irq_enabled = 0;
1650 }
1651 pmu_irq_stats[1]++;
1652 adb_int_pending = 1;
1653 spin_unlock_irqrestore(&pmu_lock, flags);
1654 via_pmu_interrupt(0, NULL);
1655 return IRQ_HANDLED;
1656 }
1657 return IRQ_NONE;
1658}
1659
1660void
1661pmu_enable_irled(int on)
1662{
1663 struct adb_request req;
1664
1665 if (vias == NULL)
1666 return ;
1667 if (pmu_kind == PMU_KEYLARGO_BASED)
1668 return ;
1669
1670 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1671 (on ? PMU_POW_ON : PMU_POW_OFF));
1672 pmu_wait_complete(&req);
1673}
1674
1675void
1676pmu_restart(void)
1677{
1678 struct adb_request req;
1679
1680 if (via == NULL)
1681 return;
1682
1683 local_irq_disable();
1684
1685 drop_interrupts = 1;
1686
1687 if (pmu_kind != PMU_KEYLARGO_BASED) {
1688 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1689 PMU_INT_TICK );
1690 while(!req.complete)
1691 pmu_poll();
1692 }
1693
1694 pmu_request(&req, NULL, 1, PMU_RESET);
1695 pmu_wait_complete(&req);
1696 for (;;)
1697 ;
1698}
1699
1700void
1701pmu_shutdown(void)
1702{
1703 struct adb_request req;
1704
1705 if (via == NULL)
1706 return;
1707
1708 local_irq_disable();
1709
1710 drop_interrupts = 1;
1711
1712 if (pmu_kind != PMU_KEYLARGO_BASED) {
1713 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1714 PMU_INT_TICK );
1715 pmu_wait_complete(&req);
1716 } else {
1717 /* Disable server mode on shutdown or we'll just
1718 * wake up again
1719 */
1720 pmu_set_server_mode(0);
1721 }
1722
1723 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1724 'M', 'A', 'T', 'T');
1725 pmu_wait_complete(&req);
1726 for (;;)
1727 ;
1728}
1729
1730int
1731pmu_present(void)
1732{
1733 return via != 0;
1734}
1735
1736#ifdef CONFIG_PM
1737
1738static LIST_HEAD(sleep_notifiers);
1739
1740int
1741pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
1742{
1743 struct list_head *list;
1744 struct pmu_sleep_notifier *notifier;
1745
1746 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1747 list = list->next) {
1748 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1749 if (n->priority > notifier->priority)
1750 break;
1751 }
1752 __list_add(&n->list, list->prev, list);
1753 return 0;
1754}
1755EXPORT_SYMBOL(pmu_register_sleep_notifier);
1756
1757int
1758pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
1759{
1760 if (n->list.next == 0)
1761 return -ENOENT;
1762 list_del(&n->list);
1763 n->list.next = NULL;
1764 return 0;
1765}
1766EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
1767#endif /* CONFIG_PM */
1768
1769#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
1770
1771/* Sleep is broadcast last-to-first */
1772static int
1773broadcast_sleep(int when, int fallback)
1774{
1775 int ret = PBOOK_SLEEP_OK;
1776 struct list_head *list;
1777 struct pmu_sleep_notifier *notifier;
1778
1779 for (list = sleep_notifiers.prev; list != &sleep_notifiers;
1780 list = list->prev) {
1781 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1782 ret = notifier->notifier_call(notifier, when);
1783 if (ret != PBOOK_SLEEP_OK) {
1784 printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
1785 when, notifier, notifier->notifier_call);
1786 for (; list != &sleep_notifiers; list = list->next) {
1787 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1788 notifier->notifier_call(notifier, fallback);
1789 }
1790 return ret;
1791 }
1792 }
1793 return ret;
1794}
1795
1796/* Wake is broadcast first-to-last */
1797static int
1798broadcast_wake(void)
1799{
1800 int ret = PBOOK_SLEEP_OK;
1801 struct list_head *list;
1802 struct pmu_sleep_notifier *notifier;
1803
1804 for (list = sleep_notifiers.next; list != &sleep_notifiers;
1805 list = list->next) {
1806 notifier = list_entry(list, struct pmu_sleep_notifier, list);
1807 notifier->notifier_call(notifier, PBOOK_WAKE);
1808 }
1809 return ret;
1810}
1811
1812/*
1813 * This struct is used to store config register values for
1814 * PCI devices which may get powered off when we sleep.
1815 */
1816static struct pci_save {
1817#ifndef HACKED_PCI_SAVE
1818 u16 command;
1819 u16 cache_lat;
1820 u16 intr;
1821 u32 rom_address;
1822#else
1823 u32 config[16];
1824#endif
1825} *pbook_pci_saves;
1826static int pbook_npci_saves;
1827
1828static void
1829pbook_alloc_pci_save(void)
1830{
1831 int npci;
1832 struct pci_dev *pd = NULL;
1833
1834 npci = 0;
1835 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1836 ++npci;
1837 }
1838 if (npci == 0)
1839 return;
1840 pbook_pci_saves = (struct pci_save *)
1841 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
1842 pbook_npci_saves = npci;
1843}
1844
1845static void
1846pbook_free_pci_save(void)
1847{
1848 if (pbook_pci_saves == NULL)
1849 return;
1850 kfree(pbook_pci_saves);
1851 pbook_pci_saves = NULL;
1852 pbook_npci_saves = 0;
1853}
1854
1855static void
1856pbook_pci_save(void)
1857{
1858 struct pci_save *ps = pbook_pci_saves;
1859 struct pci_dev *pd = NULL;
1860 int npci = pbook_npci_saves;
1861
1862 if (ps == NULL)
1863 return;
1864
1865 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1866 if (npci-- == 0) {
1867 pci_dev_put(pd);
1868 return;
1869 }
1870#ifndef HACKED_PCI_SAVE
1871 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
1872 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
1873 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
1874 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
1875#else
1876 int i;
1877 for (i=1;i<16;i++)
1878 pci_read_config_dword(pd, i<<4, &ps->config[i]);
1879#endif
1880 ++ps;
1881 }
1882}
1883
1884/* For this to work, we must take care of a few things: If gmac was enabled
1885 * during boot, it will be in the pci dev list. If it's disabled at this point
1886 * (and it will probably be), then you can't access it's config space.
1887 */
1888static void
1889pbook_pci_restore(void)
1890{
1891 u16 cmd;
1892 struct pci_save *ps = pbook_pci_saves - 1;
1893 struct pci_dev *pd = NULL;
1894 int npci = pbook_npci_saves;
1895 int j;
1896
1897 while ((pd = pci_get_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
1898#ifdef HACKED_PCI_SAVE
1899 int i;
1900 if (npci-- == 0) {
1901 pci_dev_put(pd);
1902 return;
1903 }
1904 ps++;
1905 for (i=2;i<16;i++)
1906 pci_write_config_dword(pd, i<<4, ps->config[i]);
1907 pci_write_config_dword(pd, 4, ps->config[1]);
1908#else
1909 if (npci-- == 0)
1910 return;
1911 ps++;
1912 if (ps->command == 0)
1913 continue;
1914 pci_read_config_word(pd, PCI_COMMAND, &cmd);
1915 if ((ps->command & ~cmd) == 0)
1916 continue;
1917 switch (pd->hdr_type) {
1918 case PCI_HEADER_TYPE_NORMAL:
1919 for (j = 0; j < 6; ++j)
1920 pci_write_config_dword(pd,
1921 PCI_BASE_ADDRESS_0 + j*4,
1922 pd->resource[j].start);
1923 pci_write_config_dword(pd, PCI_ROM_ADDRESS,
1924 ps->rom_address);
1925 pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
1926 ps->cache_lat);
1927 pci_write_config_word(pd, PCI_INTERRUPT_LINE,
1928 ps->intr);
1929 pci_write_config_word(pd, PCI_COMMAND, ps->command);
1930 break;
1931 }
1932#endif
1933 }
1934}
1935
1936#ifdef DEBUG_SLEEP
1937/* N.B. This doesn't work on the 3400 */
1938void
1939pmu_blink(int n)
1940{
1941 struct adb_request req;
1942
1943 memset(&req, 0, sizeof(req));
1944
1945 for (; n > 0; --n) {
1946 req.nbytes = 4;
1947 req.done = NULL;
1948 req.data[0] = 0xee;
1949 req.data[1] = 4;
1950 req.data[2] = 0;
1951 req.data[3] = 1;
1952 req.reply[0] = ADB_RET_OK;
1953 req.reply_len = 1;
1954 req.reply_expected = 0;
1955 pmu_polled_request(&req);
1956 mdelay(50);
1957 req.nbytes = 4;
1958 req.done = NULL;
1959 req.data[0] = 0xee;
1960 req.data[1] = 4;
1961 req.data[2] = 0;
1962 req.data[3] = 0;
1963 req.reply[0] = ADB_RET_OK;
1964 req.reply_len = 1;
1965 req.reply_expected = 0;
1966 pmu_polled_request(&req);
1967 mdelay(50);
1968 }
1969 mdelay(50);
1970}
1971#endif
1972
1973/*
1974 * Put the powerbook to sleep.
1975 */
1976
1977static u32 save_via[8];
1978
1979static void
1980save_via_state(void)
1981{
1982 save_via[0] = in_8(&via[ANH]);
1983 save_via[1] = in_8(&via[DIRA]);
1984 save_via[2] = in_8(&via[B]);
1985 save_via[3] = in_8(&via[DIRB]);
1986 save_via[4] = in_8(&via[PCR]);
1987 save_via[5] = in_8(&via[ACR]);
1988 save_via[6] = in_8(&via[T1CL]);
1989 save_via[7] = in_8(&via[T1CH]);
1990}
1991static void
1992restore_via_state(void)
1993{
1994 out_8(&via[ANH], save_via[0]);
1995 out_8(&via[DIRA], save_via[1]);
1996 out_8(&via[B], save_via[2]);
1997 out_8(&via[DIRB], save_via[3]);
1998 out_8(&via[PCR], save_via[4]);
1999 out_8(&via[ACR], save_via[5]);
2000 out_8(&via[T1CL], save_via[6]);
2001 out_8(&via[T1CH], save_via[7]);
2002 out_8(&via[IER], IER_CLR | 0x7f); /* disable all intrs */
2003 out_8(&via[IFR], 0x7f); /* clear IFR */
2004 out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2005}
2006
2007extern void pmu_backlight_set_sleep(int sleep);
2008
2009static int
2010pmac_suspend_devices(void)
2011{
2012 int ret;
2013
2014 pm_prepare_console();
2015
2016 /* Notify old-style device drivers & userland */
2017 ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2018 if (ret != PBOOK_SLEEP_OK) {
2019 printk(KERN_ERR "Sleep rejected by drivers\n");
2020 return -EBUSY;
2021 }
2022
2023 /* Sync the disks. */
2024 /* XXX It would be nice to have some way to ensure that
2025 * nobody is dirtying any new buffers while we wait. That
2026 * could be achieved using the refrigerator for processes
2027 * that swsusp uses
2028 */
2029 sys_sync();
2030
2031 /* Sleep can fail now. May not be very robust but useful for debugging */
2032 ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2033 if (ret != PBOOK_SLEEP_OK) {
2034 printk(KERN_ERR "Driver sleep failed\n");
2035 return -EBUSY;
2036 }
2037
2038 /* Send suspend call to devices, hold the device core's dpm_sem */
2039 ret = device_suspend(PMSG_SUSPEND);
2040 if (ret) {
2041 broadcast_wake();
2042 printk(KERN_ERR "Driver sleep failed\n");
2043 return -EBUSY;
2044 }
2045
2046#ifdef CONFIG_PMAC_BACKLIGHT
2047 /* Tell backlight code not to muck around with the chip anymore */
2048 pmu_backlight_set_sleep(1);
2049#endif
2050
2051 /* Call platform functions marked "on sleep" */
2052 pmac_pfunc_i2c_suspend();
2053 pmac_pfunc_base_suspend();
2054
2055 /* Stop preemption */
2056 preempt_disable();
2057
2058 /* Make sure the decrementer won't interrupt us */
2059 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2060 /* Make sure any pending DEC interrupt occurring while we did
2061 * the above didn't re-enable the DEC */
2062 mb();
2063 asm volatile("mtdec %0" : : "r" (0x7fffffff));
2064
2065 /* We can now disable MSR_EE. This code of course works properly only
2066 * on UP machines... For SMP, if we ever implement sleep, we'll have to
2067 * stop the "other" CPUs way before we do all that stuff.
2068 */
2069 local_irq_disable();
2070
2071 /* Broadcast power down irq
2072 * This isn't that useful in most cases (only directly wired devices can
2073 * use this but still... This will take care of sysdev's as well, so
2074 * we exit from here with local irqs disabled and PIC off.
2075 */
2076 ret = device_power_down(PMSG_SUSPEND);
2077 if (ret) {
2078 wakeup_decrementer();
2079 local_irq_enable();
2080 preempt_enable();
2081 device_resume();
2082 broadcast_wake();
2083 printk(KERN_ERR "Driver powerdown failed\n");
2084 return -EBUSY;
2085 }
2086
2087 /* Wait for completion of async requests */
2088 while (!batt_req.complete)
2089 pmu_poll();
2090
2091 /* Giveup the lazy FPU & vec so we don't have to back them
2092 * up from the low level code
2093 */
2094 enable_kernel_fp();
2095
2096#ifdef CONFIG_ALTIVEC
2097 if (cpu_has_feature(CPU_FTR_ALTIVEC))
2098 enable_kernel_altivec();
2099#endif /* CONFIG_ALTIVEC */
2100
2101 return 0;
2102}
2103
2104static int
2105pmac_wakeup_devices(void)
2106{
2107 mdelay(100);
2108
2109#ifdef CONFIG_PMAC_BACKLIGHT
2110 /* Tell backlight code it can use the chip again */
2111 pmu_backlight_set_sleep(0);
2112#endif
2113
2114 /* Power back up system devices (including the PIC) */
2115 device_power_up();
2116
2117 /* Force a poll of ADB interrupts */
2118 adb_int_pending = 1;
2119 via_pmu_interrupt(0, NULL);
2120
2121 /* Restart jiffies & scheduling */
2122 wakeup_decrementer();
2123
2124 /* Re-enable local CPU interrupts */
2125 local_irq_enable();
2126 mdelay(10);
2127 preempt_enable();
2128
2129 /* Call platform functions marked "on wake" */
2130 pmac_pfunc_base_resume();
2131 pmac_pfunc_i2c_resume();
2132
2133 /* Resume devices */
2134 device_resume();
2135
2136 /* Notify old style drivers */
2137 broadcast_wake();
2138
2139 pm_restore_console();
2140
2141 return 0;
2142}
2143
2144#define GRACKLE_PM (1<<7)
2145#define GRACKLE_DOZE (1<<5)
2146#define GRACKLE_NAP (1<<4)
2147#define GRACKLE_SLEEP (1<<3)
2148
2149static int powerbook_sleep_grackle(void)
2150{
2151 unsigned long save_l2cr;
2152 unsigned short pmcr1;
2153 struct adb_request req;
2154 int ret;
2155 struct pci_dev *grackle;
2156
2157 grackle = pci_find_slot(0, 0);
2158 if (!grackle)
2159 return -ENODEV;
2160
2161 ret = pmac_suspend_devices();
2162 if (ret) {
2163 printk(KERN_ERR "Sleep rejected by devices\n");
2164 return ret;
2165 }
2166
2167 /* Turn off various things. Darwin does some retry tests here... */
2168 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2169 pmu_wait_complete(&req);
2170 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2171 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2172 pmu_wait_complete(&req);
2173
2174 /* For 750, save backside cache setting and disable it */
2175 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2176
2177 if (!__fake_sleep) {
2178 /* Ask the PMU to put us to sleep */
2179 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2180 pmu_wait_complete(&req);
2181 }
2182
2183 /* The VIA is supposed not to be restored correctly*/
2184 save_via_state();
2185 /* We shut down some HW */
2186 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2187
2188 pci_read_config_word(grackle, 0x70, &pmcr1);
2189 /* Apparently, MacOS uses NAP mode for Grackle ??? */
2190 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2191 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2192 pci_write_config_word(grackle, 0x70, pmcr1);
2193
2194 /* Call low-level ASM sleep handler */
2195 if (__fake_sleep)
2196 mdelay(5000);
2197 else
2198 low_sleep_handler();
2199
2200 /* We're awake again, stop grackle PM */
2201 pci_read_config_word(grackle, 0x70, &pmcr1);
2202 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2203 pci_write_config_word(grackle, 0x70, pmcr1);
2204
2205 /* Make sure the PMU is idle */
2206 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2207 restore_via_state();
2208
2209 /* Restore L2 cache */
2210 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2211 _set_L2CR(save_l2cr);
2212
2213 /* Restore userland MMU context */
2214 set_context(current->active_mm->context.id, current->active_mm->pgd);
2215
2216 /* Power things up */
2217 pmu_unlock();
2218 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2219 pmu_wait_complete(&req);
2220 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2221 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2222 pmu_wait_complete(&req);
2223 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2224 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2225 pmu_wait_complete(&req);
2226
2227 pmac_wakeup_devices();
2228
2229 return 0;
2230}
2231
2232static int
2233powerbook_sleep_Core99(void)
2234{
2235 unsigned long save_l2cr;
2236 unsigned long save_l3cr;
2237 struct adb_request req;
2238 int ret;
2239
2240 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2241 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2242 return -ENOSYS;
2243 }
2244
2245 if (num_online_cpus() > 1 || cpu_is_offline(0))
2246 return -EAGAIN;
2247
2248 ret = pmac_suspend_devices();
2249 if (ret) {
2250 printk(KERN_ERR "Sleep rejected by devices\n");
2251 return ret;
2252 }
2253
2254 /* Stop environment and ADB interrupts */
2255 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2256 pmu_wait_complete(&req);
2257
2258 /* Tell PMU what events will wake us up */
2259 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2260 0xff, 0xff);
2261 pmu_wait_complete(&req);
2262 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2263 0, PMU_PWR_WAKEUP_KEY |
2264 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2265 pmu_wait_complete(&req);
2266
2267 /* Save the state of the L2 and L3 caches */
2268 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */
2269 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */
2270
2271 if (!__fake_sleep) {
2272 /* Ask the PMU to put us to sleep */
2273 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2274 pmu_wait_complete(&req);
2275 }
2276
2277 /* The VIA is supposed not to be restored correctly*/
2278 save_via_state();
2279
2280 /* Shut down various ASICs. There's a chance that we can no longer
2281 * talk to the PMU after this, so I moved it to _after_ sending the
2282 * sleep command to it. Still need to be checked.
2283 */
2284 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2285
2286 /* Call low-level ASM sleep handler */
2287 if (__fake_sleep)
2288 mdelay(5000);
2289 else
2290 low_sleep_handler();
2291
2292 /* Restore Apple core ASICs state */
2293 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2294
2295 /* Restore VIA */
2296 restore_via_state();
2297
2298 /* tweak LPJ before cpufreq is there */
2299 loops_per_jiffy *= 2;
2300
2301 /* Restore video */
2302 pmac_call_early_video_resume();
2303
2304 /* Restore L2 cache */
2305 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2306 _set_L2CR(save_l2cr);
2307 /* Restore L3 cache */
2308 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2309 _set_L3CR(save_l3cr);
2310
2311 /* Restore userland MMU context */
2312 set_context(current->active_mm->context.id, current->active_mm->pgd);
2313
2314 /* Tell PMU we are ready */
2315 pmu_unlock();
2316 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2317 pmu_wait_complete(&req);
2318 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2319 pmu_wait_complete(&req);
2320
2321 /* Restore LPJ, cpufreq will adjust the cpu frequency */
2322 loops_per_jiffy /= 2;
2323
2324 pmac_wakeup_devices();
2325
2326 return 0;
2327}
2328
2329#define PB3400_MEM_CTRL 0xf8000000
2330#define PB3400_MEM_CTRL_SLEEP 0x70
2331
2332static int
2333powerbook_sleep_3400(void)
2334{
2335 int ret, i, x;
2336 unsigned int hid0;
2337 unsigned long p;
2338 struct adb_request sleep_req;
2339 void __iomem *mem_ctrl;
2340 unsigned int __iomem *mem_ctrl_sleep;
2341
2342 /* first map in the memory controller registers */
2343 mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2344 if (mem_ctrl == NULL) {
2345 printk("powerbook_sleep_3400: ioremap failed\n");
2346 return -ENOMEM;
2347 }
2348 mem_ctrl_sleep = mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2349
2350 /* Allocate room for PCI save */
2351 pbook_alloc_pci_save();
2352
2353 ret = pmac_suspend_devices();
2354 if (ret) {
2355 pbook_free_pci_save();
2356 printk(KERN_ERR "Sleep rejected by devices\n");
2357 return ret;
2358 }
2359
2360 /* Save the state of PCI config space for some slots */
2361 pbook_pci_save();
2362
2363 /* Set the memory controller to keep the memory refreshed
2364 while we're asleep */
2365 for (i = 0x403f; i >= 0x4000; --i) {
2366 out_be32(mem_ctrl_sleep, i);
2367 do {
2368 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2369 } while (x == 0);
2370 if (x >= 0x100)
2371 break;
2372 }
2373
2374 /* Ask the PMU to put us to sleep */
2375 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2376 while (!sleep_req.complete)
2377 mb();
2378
2379 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2380
2381 /* displacement-flush the L2 cache - necessary? */
2382 for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2383 i = *(volatile int *)p;
2384 asleep = 1;
2385
2386 /* Put the CPU into sleep mode */
2387 hid0 = mfspr(SPRN_HID0);
2388 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2389 mtspr(SPRN_HID0, hid0);
2390 mtmsr(mfmsr() | MSR_POW | MSR_EE);
2391 udelay(10);
2392
2393 /* OK, we're awake again, start restoring things */
2394 out_be32(mem_ctrl_sleep, 0x3f);
2395 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2396 pbook_pci_restore();
2397 pmu_unlock();
2398
2399 /* wait for the PMU interrupt sequence to complete */
2400 while (asleep)
2401 mb();
2402
2403 pmac_wakeup_devices();
2404 pbook_free_pci_save();
2405 iounmap(mem_ctrl);
2406
2407 return 0;
2408}
2409
2410#endif /* CONFIG_PM && CONFIG_PPC32 */
2411
2412/*
2413 * Support for /dev/pmu device
2414 */
2415#define RB_SIZE 0x10
2416struct pmu_private {
2417 struct list_head list;
2418 int rb_get;
2419 int rb_put;
2420 struct rb_entry {
2421 unsigned short len;
2422 unsigned char data[16];
2423 } rb_buf[RB_SIZE];
2424 wait_queue_head_t wait;
2425 spinlock_t lock;
2426#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2427 int backlight_locker;
2428#endif
2429};
2430
2431static LIST_HEAD(all_pmu_pvt);
2432static DEFINE_SPINLOCK(all_pvt_lock);
2433
2434static void
2435pmu_pass_intr(unsigned char *data, int len)
2436{
2437 struct pmu_private *pp;
2438 struct list_head *list;
2439 int i;
2440 unsigned long flags;
2441
2442 if (len > sizeof(pp->rb_buf[0].data))
2443 len = sizeof(pp->rb_buf[0].data);
2444 spin_lock_irqsave(&all_pvt_lock, flags);
2445 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2446 pp = list_entry(list, struct pmu_private, list);
2447 spin_lock(&pp->lock);
2448 i = pp->rb_put + 1;
2449 if (i >= RB_SIZE)
2450 i = 0;
2451 if (i != pp->rb_get) {
2452 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2453 rp->len = len;
2454 memcpy(rp->data, data, len);
2455 pp->rb_put = i;
2456 wake_up_interruptible(&pp->wait);
2457 }
2458 spin_unlock(&pp->lock);
2459 }
2460 spin_unlock_irqrestore(&all_pvt_lock, flags);
2461}
2462
2463static int
2464pmu_open(struct inode *inode, struct file *file)
2465{
2466 struct pmu_private *pp;
2467 unsigned long flags;
2468
2469 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2470 if (pp == 0)
2471 return -ENOMEM;
2472 pp->rb_get = pp->rb_put = 0;
2473 spin_lock_init(&pp->lock);
2474 init_waitqueue_head(&pp->wait);
2475 spin_lock_irqsave(&all_pvt_lock, flags);
2476#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2477 pp->backlight_locker = 0;
2478#endif
2479 list_add(&pp->list, &all_pmu_pvt);
2480 spin_unlock_irqrestore(&all_pvt_lock, flags);
2481 file->private_data = pp;
2482 return 0;
2483}
2484
2485static ssize_t
2486pmu_read(struct file *file, char __user *buf,
2487 size_t count, loff_t *ppos)
2488{
2489 struct pmu_private *pp = file->private_data;
2490 DECLARE_WAITQUEUE(wait, current);
2491 unsigned long flags;
2492 int ret = 0;
2493
2494 if (count < 1 || pp == 0)
2495 return -EINVAL;
2496 if (!access_ok(VERIFY_WRITE, buf, count))
2497 return -EFAULT;
2498
2499 spin_lock_irqsave(&pp->lock, flags);
2500 add_wait_queue(&pp->wait, &wait);
2501 current->state = TASK_INTERRUPTIBLE;
2502
2503 for (;;) {
2504 ret = -EAGAIN;
2505 if (pp->rb_get != pp->rb_put) {
2506 int i = pp->rb_get;
2507 struct rb_entry *rp = &pp->rb_buf[i];
2508 ret = rp->len;
2509 spin_unlock_irqrestore(&pp->lock, flags);
2510 if (ret > count)
2511 ret = count;
2512 if (ret > 0 && copy_to_user(buf, rp->data, ret))
2513 ret = -EFAULT;
2514 if (++i >= RB_SIZE)
2515 i = 0;
2516 spin_lock_irqsave(&pp->lock, flags);
2517 pp->rb_get = i;
2518 }
2519 if (ret >= 0)
2520 break;
2521 if (file->f_flags & O_NONBLOCK)
2522 break;
2523 ret = -ERESTARTSYS;
2524 if (signal_pending(current))
2525 break;
2526 spin_unlock_irqrestore(&pp->lock, flags);
2527 schedule();
2528 spin_lock_irqsave(&pp->lock, flags);
2529 }
2530 current->state = TASK_RUNNING;
2531 remove_wait_queue(&pp->wait, &wait);
2532 spin_unlock_irqrestore(&pp->lock, flags);
2533
2534 return ret;
2535}
2536
2537static ssize_t
2538pmu_write(struct file *file, const char __user *buf,
2539 size_t count, loff_t *ppos)
2540{
2541 return 0;
2542}
2543
2544static unsigned int
2545pmu_fpoll(struct file *filp, poll_table *wait)
2546{
2547 struct pmu_private *pp = filp->private_data;
2548 unsigned int mask = 0;
2549 unsigned long flags;
2550
2551 if (pp == 0)
2552 return 0;
2553 poll_wait(filp, &pp->wait, wait);
2554 spin_lock_irqsave(&pp->lock, flags);
2555 if (pp->rb_get != pp->rb_put)
2556 mask |= POLLIN;
2557 spin_unlock_irqrestore(&pp->lock, flags);
2558 return mask;
2559}
2560
2561static int
2562pmu_release(struct inode *inode, struct file *file)
2563{
2564 struct pmu_private *pp = file->private_data;
2565 unsigned long flags;
2566
2567 lock_kernel();
2568 if (pp != 0) {
2569 file->private_data = NULL;
2570 spin_lock_irqsave(&all_pvt_lock, flags);
2571 list_del(&pp->list);
2572 spin_unlock_irqrestore(&all_pvt_lock, flags);
2573
2574#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2575 if (pp->backlight_locker)
2576 pmac_backlight_enable();
2577#endif
2578
2579 kfree(pp);
2580 }
2581 unlock_kernel();
2582 return 0;
2583}
2584
2585static int
2586pmu_ioctl(struct inode * inode, struct file *filp,
2587 u_int cmd, u_long arg)
2588{
2589 __u32 __user *argp = (__u32 __user *)arg;
2590 int error = -EINVAL;
2591
2592 switch (cmd) {
2593#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2594 case PMU_IOC_SLEEP:
2595 if (!capable(CAP_SYS_ADMIN))
2596 return -EACCES;
2597 if (sleep_in_progress)
2598 return -EBUSY;
2599 sleep_in_progress = 1;
2600 switch (pmu_kind) {
2601 case PMU_OHARE_BASED:
2602 error = powerbook_sleep_3400();
2603 break;
2604 case PMU_HEATHROW_BASED:
2605 case PMU_PADDINGTON_BASED:
2606 error = powerbook_sleep_grackle();
2607 break;
2608 case PMU_KEYLARGO_BASED:
2609 error = powerbook_sleep_Core99();
2610 break;
2611 default:
2612 error = -ENOSYS;
2613 }
2614 sleep_in_progress = 0;
2615 break;
2616 case PMU_IOC_CAN_SLEEP:
2617 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2618 return put_user(0, argp);
2619 else
2620 return put_user(1, argp);
2621#endif /* CONFIG_PM && CONFIG_PPC32 */
2622
2623#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2624 /* Compatibility ioctl's for backlight */
2625 case PMU_IOC_GET_BACKLIGHT:
2626 {
2627 int brightness;
2628
2629 if (sleep_in_progress)
2630 return -EBUSY;
2631
2632 brightness = pmac_backlight_get_legacy_brightness();
2633 if (brightness < 0)
2634 return brightness;
2635 else
2636 return put_user(brightness, argp);
2637
2638 }
2639 case PMU_IOC_SET_BACKLIGHT:
2640 {
2641 int brightness;
2642
2643 if (sleep_in_progress)
2644 return -EBUSY;
2645
2646 error = get_user(brightness, argp);
2647 if (error)
2648 return error;
2649
2650 return pmac_backlight_set_legacy_brightness(brightness);
2651 }
2652#ifdef CONFIG_INPUT_ADBHID
2653 case PMU_IOC_GRAB_BACKLIGHT: {
2654 struct pmu_private *pp = filp->private_data;
2655
2656 if (pp->backlight_locker)
2657 return 0;
2658
2659 pp->backlight_locker = 1;
2660 pmac_backlight_disable();
2661
2662 return 0;
2663 }
2664#endif /* CONFIG_INPUT_ADBHID */
2665#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2666
2667 case PMU_IOC_GET_MODEL:
2668 return put_user(pmu_kind, argp);
2669 case PMU_IOC_HAS_ADB:
2670 return put_user(pmu_has_adb, argp);
2671 }
2672 return error;
2673}
2674
2675static struct file_operations pmu_device_fops = {
2676 .read = pmu_read,
2677 .write = pmu_write,
2678 .poll = pmu_fpoll,
2679 .ioctl = pmu_ioctl,
2680 .open = pmu_open,
2681 .release = pmu_release,
2682};
2683
2684static struct miscdevice pmu_device = {
2685 PMU_MINOR, "pmu", &pmu_device_fops
2686};
2687
2688static int pmu_device_init(void)
2689{
2690 if (!via)
2691 return 0;
2692 if (misc_register(&pmu_device) < 0)
2693 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2694 return 0;
2695}
2696device_initcall(pmu_device_init);
2697
2698
2699#ifdef DEBUG_SLEEP
2700static inline void
2701polled_handshake(volatile unsigned char __iomem *via)
2702{
2703 via[B] &= ~TREQ; eieio();
2704 while ((via[B] & TACK) != 0)
2705 ;
2706 via[B] |= TREQ; eieio();
2707 while ((via[B] & TACK) == 0)
2708 ;
2709}
2710
2711static inline void
2712polled_send_byte(volatile unsigned char __iomem *via, int x)
2713{
2714 via[ACR] |= SR_OUT | SR_EXT; eieio();
2715 via[SR] = x; eieio();
2716 polled_handshake(via);
2717}
2718
2719static inline int
2720polled_recv_byte(volatile unsigned char __iomem *via)
2721{
2722 int x;
2723
2724 via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2725 x = via[SR]; eieio();
2726 polled_handshake(via);
2727 x = via[SR]; eieio();
2728 return x;
2729}
2730
2731int
2732pmu_polled_request(struct adb_request *req)
2733{
2734 unsigned long flags;
2735 int i, l, c;
2736 volatile unsigned char __iomem *v = via;
2737
2738 req->complete = 1;
2739 c = req->data[0];
2740 l = pmu_data_len[c][0];
2741 if (l >= 0 && req->nbytes != l + 1)
2742 return -EINVAL;
2743
2744 local_irq_save(flags);
2745 while (pmu_state != idle)
2746 pmu_poll();
2747
2748 while ((via[B] & TACK) == 0)
2749 ;
2750 polled_send_byte(v, c);
2751 if (l < 0) {
2752 l = req->nbytes - 1;
2753 polled_send_byte(v, l);
2754 }
2755 for (i = 1; i <= l; ++i)
2756 polled_send_byte(v, req->data[i]);
2757
2758 l = pmu_data_len[c][1];
2759 if (l < 0)
2760 l = polled_recv_byte(v);
2761 for (i = 0; i < l; ++i)
2762 req->reply[i + req->reply_len] = polled_recv_byte(v);
2763
2764 if (req->done)
2765 (*req->done)(req);
2766
2767 local_irq_restore(flags);
2768 return 0;
2769}
2770#endif /* DEBUG_SLEEP */
2771
2772
2773/* FIXME: This is a temporary set of callbacks to enable us
2774 * to do suspend-to-disk.
2775 */
2776
2777#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2778
2779static int pmu_sys_suspended = 0;
2780
2781static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2782{
2783 if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2784 return 0;
2785
2786 /* Suspend PMU event interrupts */
2787 pmu_suspend();
2788
2789 pmu_sys_suspended = 1;
2790 return 0;
2791}
2792
2793static int pmu_sys_resume(struct sys_device *sysdev)
2794{
2795 struct adb_request req;
2796
2797 if (!pmu_sys_suspended)
2798 return 0;
2799
2800 /* Tell PMU we are ready */
2801 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2802 pmu_wait_complete(&req);
2803
2804 /* Resume PMU event interrupts */
2805 pmu_resume();
2806
2807 pmu_sys_suspended = 0;
2808
2809 return 0;
2810}
2811
2812#endif /* CONFIG_PM && CONFIG_PPC32 */
2813
2814static struct sysdev_class pmu_sysclass = {
2815 set_kset_name("pmu"),
2816};
2817
2818static struct sys_device device_pmu = {
2819 .id = 0,
2820 .cls = &pmu_sysclass,
2821};
2822
2823static struct sysdev_driver driver_pmu = {
2824#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2825 .suspend = &pmu_sys_suspend,
2826 .resume = &pmu_sys_resume,
2827#endif /* CONFIG_PM && CONFIG_PPC32 */
2828};
2829
2830static int __init init_pmu_sysfs(void)
2831{
2832 int rc;
2833
2834 rc = sysdev_class_register(&pmu_sysclass);
2835 if (rc) {
2836 printk(KERN_ERR "Failed registering PMU sys class\n");
2837 return -ENODEV;
2838 }
2839 rc = sysdev_register(&device_pmu);
2840 if (rc) {
2841 printk(KERN_ERR "Failed registering PMU sys device\n");
2842 return -ENODEV;
2843 }
2844 rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2845 if (rc) {
2846 printk(KERN_ERR "Failed registering PMU sys driver\n");
2847 return -ENODEV;
2848 }
2849 return 0;
2850}
2851
2852subsys_initcall(init_pmu_sysfs);
2853
2854EXPORT_SYMBOL(pmu_request);
2855EXPORT_SYMBOL(pmu_queue_request);
2856EXPORT_SYMBOL(pmu_poll);
2857EXPORT_SYMBOL(pmu_poll_adb);
2858EXPORT_SYMBOL(pmu_wait_complete);
2859EXPORT_SYMBOL(pmu_suspend);
2860EXPORT_SYMBOL(pmu_resume);
2861EXPORT_SYMBOL(pmu_unlock);
2862#if defined(CONFIG_PM) && defined(CONFIG_PPC32)
2863EXPORT_SYMBOL(pmu_enable_irled);
2864EXPORT_SYMBOL(pmu_battery_count);
2865EXPORT_SYMBOL(pmu_batteries);
2866EXPORT_SYMBOL(pmu_power_flags);
2867#endif /* CONFIG_PM && CONFIG_PPC32 */
2868