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