2666 lines · c
1// SPDX-License-Identifier: GPL-2.02/*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 control7 * battery charging and system power on the PowerBook 3400 and 2400.8 * The PMU also controls the ADB (Apple Desktop Bus) which connects9 * to the keyboard and mouse, as well as the non-volatile RAM10 * and the RTC (real time clock) chip.11 *12 * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.13 * Copyright (C) 2001-2002 Benjamin Herrenschmidt14 * Copyright (C) 2006-2007 Johannes Berg15 *16 * THIS DRIVER IS BECOMING A TOTAL MESS !17 * - Cleanup atomically disabling reply to PMU events after18 * a sleep or a freq. switch19 *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_PMAC59#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#else67#include <asm/macintosh.h>68#include <asm/macints.h>69#include <asm/mac_via.h>70#endif71 72#include "via-pmu-event.h"73 74/* Some compile options */75#undef DEBUG_SLEEP76 77/* How many iterations between battery polls */78#define BATTERY_POLLING_COUNT 279 80static DEFINE_MUTEX(pmu_info_proc_mutex);81 82/* VIA registers - spaced 0x200 bytes apart */83#define RS 0x200 /* skip between registers */84#define B 0 /* B-side data */85#define A RS /* A-side data */86#define DIRB (2*RS) /* B-side direction (1=output) */87#define DIRA (3*RS) /* A-side direction (1=output) */88#define T1CL (4*RS) /* Timer 1 ctr/latch (low 8 bits) */89#define T1CH (5*RS) /* Timer 1 counter (high 8 bits) */90#define T1LL (6*RS) /* Timer 1 latch (low 8 bits) */91#define T1LH (7*RS) /* Timer 1 latch (high 8 bits) */92#define T2CL (8*RS) /* Timer 2 ctr/latch (low 8 bits) */93#define T2CH (9*RS) /* Timer 2 counter (high 8 bits) */94#define SR (10*RS) /* Shift register */95#define ACR (11*RS) /* Auxiliary control register */96#define PCR (12*RS) /* Peripheral control register */97#define IFR (13*RS) /* Interrupt flag register */98#define IER (14*RS) /* Interrupt enable register */99#define ANH (15*RS) /* A-side data, no handshake */100 101/* Bits in B data register: both active low */102#ifdef CONFIG_PPC_PMAC103#define TACK 0x08 /* Transfer acknowledge (input) */104#define TREQ 0x10 /* Transfer request (output) */105#else106#define TACK 0x02107#define TREQ 0x04108#endif109 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 0x08120#define CB1_INT 0x10 /* transition on CB1 input */121 122static volatile enum pmu_state {123 uninitialized = 0,124 idle,125 sending,126 intack,127 reading,128 reading_intr,129 locked,130} pmu_state;131 132static volatile enum int_data_state {133 int_data_empty,134 int_data_fill,135 int_data_ready,136 int_data_flush137} int_data_state[2] = { int_data_empty, int_data_empty };138 139static struct adb_request *current_req;140static struct adb_request *last_req;141static struct adb_request *req_awaiting_reply;142static unsigned char interrupt_data[2][32];143static int interrupt_data_len[2];144static int int_data_last;145static unsigned char *reply_ptr;146static int data_index;147static int data_len;148static volatile int adb_int_pending;149static volatile int disable_poll;150static int pmu_kind = PMU_UNKNOWN;151static int pmu_fully_inited;152static int pmu_has_adb;153#ifdef CONFIG_PPC_PMAC154static volatile unsigned char __iomem *via1;155static volatile unsigned char __iomem *via2;156static struct device_node *vias;157static struct device_node *gpio_node;158#endif159static unsigned char __iomem *gpio_reg;160static int gpio_irq = 0;161static int gpio_irq_enabled = -1;162static volatile int pmu_suspended;163static DEFINE_SPINLOCK(pmu_lock);164static u8 pmu_intr_mask;165static int pmu_version;166static int drop_interrupts;167#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)168static int option_lid_wakeup = 1;169#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */170static unsigned long async_req_locks;171 172#define NUM_IRQ_STATS 13173static unsigned int pmu_irq_stats[NUM_IRQ_STATS];174 175static struct proc_dir_entry *proc_pmu_root;176static struct proc_dir_entry *proc_pmu_info;177static struct proc_dir_entry *proc_pmu_irqstats;178static struct proc_dir_entry *proc_pmu_options;179static int option_server_mode;180 181int pmu_battery_count;182static int pmu_cur_battery;183unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;184struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];185static int query_batt_timer = BATTERY_POLLING_COUNT;186static struct adb_request batt_req;187static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];188 189int asleep;190 191#ifdef CONFIG_ADB192static int adb_dev_map;193static int pmu_adb_flags;194 195static int pmu_probe(void);196static int pmu_init(void);197static int pmu_send_request(struct adb_request *req, int sync);198static int pmu_adb_autopoll(int devs);199static int pmu_adb_reset_bus(void);200#endif /* CONFIG_ADB */201 202static int init_pmu(void);203static void pmu_start(void);204static irqreturn_t via_pmu_interrupt(int irq, void *arg);205static irqreturn_t gpio1_interrupt(int irq, void *arg);206#ifdef CONFIG_PROC_FS207static int pmu_info_proc_show(struct seq_file *m, void *v);208static int pmu_irqstats_proc_show(struct seq_file *m, void *v);209static int pmu_battery_proc_show(struct seq_file *m, void *v);210#endif211static void pmu_pass_intr(unsigned char *data, int len);212static const struct proc_ops pmu_options_proc_ops;213 214#ifdef CONFIG_ADB215const struct adb_driver via_pmu_driver = {216 .name = "PMU",217 .probe = pmu_probe,218 .init = pmu_init,219 .send_request = pmu_send_request,220 .autopoll = pmu_adb_autopoll,221 .poll = pmu_poll_adb,222 .reset_bus = pmu_adb_reset_bus,223};224#endif /* CONFIG_ADB */225 226extern void low_sleep_handler(void);227extern void enable_kernel_altivec(void);228extern void enable_kernel_fp(void);229 230#ifdef DEBUG_SLEEP231int pmu_polled_request(struct adb_request *req);232void pmu_blink(int n);233#endif234 235/*236 * This table indicates for each PMU opcode:237 * - the number of data bytes to be sent with the command, or -1238 * if a length byte should be sent,239 * - the number of response bytes which the PMU will return, or240 * -1 if it will send a length byte.241 */242static const s8 pmu_data_len[256][2] = {243/* 0 1 2 3 4 5 6 7 */244/*00*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},245/*08*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},246/*10*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},247/*18*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},248/*20*/ {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},249/*28*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},250/*30*/ { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},251/*38*/ { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},252/*40*/ { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},253/*48*/ { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},254/*50*/ { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},255/*58*/ { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},256/*60*/ { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},257/*68*/ { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},258/*70*/ { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},259/*78*/ { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},260/*80*/ { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},261/*88*/ { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},262/*90*/ { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},263/*98*/ { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},264/*a0*/ { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},265/*a8*/ { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},266/*b0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},267/*b8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},268/*c0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},269/*c8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},270/*d0*/ { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},271/*d8*/ { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},272/*e0*/ {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},273/*e8*/ { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},274/*f0*/ {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},275/*f8*/ {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},276};277 278static char *pbook_type[] = {279 "Unknown PowerBook",280 "PowerBook 2400/3400/3500(G3)",281 "PowerBook G3 Series",282 "1999 PowerBook G3",283 "Core99"284};285 286int __init find_via_pmu(void)287{288#ifdef CONFIG_PPC_PMAC289 int err;290 u64 taddr;291 struct resource res;292 293 if (pmu_state != uninitialized)294 return 1;295 vias = of_find_node_by_name(NULL, "via-pmu");296 if (vias == NULL)297 return 0;298 299 err = of_address_to_resource(vias, 0, &res);300 if (err) {301 printk(KERN_ERR "via-pmu: Error getting \"reg\" property !\n");302 goto fail;303 }304 taddr = res.start;305 306 pmu_has_adb = 1;307 308 pmu_intr_mask = PMU_INT_PCEJECT |309 PMU_INT_SNDBRT |310 PMU_INT_ADB |311 PMU_INT_TICK;312 313 if (of_node_name_eq(vias->parent, "ohare") ||314 of_device_is_compatible(vias->parent, "ohare"))315 pmu_kind = PMU_OHARE_BASED;316 else if (of_device_is_compatible(vias->parent, "paddington"))317 pmu_kind = PMU_PADDINGTON_BASED;318 else if (of_device_is_compatible(vias->parent, "heathrow"))319 pmu_kind = PMU_HEATHROW_BASED;320 else if (of_device_is_compatible(vias->parent, "Keylargo")321 || of_device_is_compatible(vias->parent, "K2-Keylargo")) {322 struct device_node *gpiop;323 struct device_node *adbp;324 325 pmu_kind = PMU_KEYLARGO_BASED;326 adbp = of_find_node_by_type(NULL, "adb");327 pmu_has_adb = (adbp != NULL);328 of_node_put(adbp);329 pmu_intr_mask = PMU_INT_PCEJECT |330 PMU_INT_SNDBRT |331 PMU_INT_ADB |332 PMU_INT_TICK |333 PMU_INT_ENVIRONMENT;334 335 gpiop = of_find_node_by_name(NULL, "gpio");336 if (gpiop) {337 if (!of_address_to_resource(gpiop, 0, &res))338 gpio_reg = ioremap(res.start, 0x10);339 of_node_put(gpiop);340 }341 if (gpio_reg == NULL) {342 printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");343 goto fail;344 }345 } else346 pmu_kind = PMU_UNKNOWN;347 348 via1 = via2 = ioremap(taddr, 0x2000);349 if (via1 == NULL) {350 printk(KERN_ERR "via-pmu: Can't map address !\n");351 goto fail_via_remap;352 }353 354 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */355 out_8(&via1[IFR], 0x7f); /* clear IFR */356 357 pmu_state = idle;358 359 if (!init_pmu())360 goto fail_init;361 362 sys_ctrler = SYS_CTRLER_PMU;363 364 return 1;365 366 fail_init:367 iounmap(via1);368 via1 = via2 = NULL;369 fail_via_remap:370 iounmap(gpio_reg);371 gpio_reg = NULL;372 fail:373 of_node_put(vias);374 vias = NULL;375 pmu_state = uninitialized;376 return 0;377#else378 if (macintosh_config->adb_type != MAC_ADB_PB2)379 return 0;380 381 pmu_kind = PMU_UNKNOWN;382 383 pmu_has_adb = 1;384 385 pmu_intr_mask = PMU_INT_PCEJECT |386 PMU_INT_SNDBRT |387 PMU_INT_ADB |388 PMU_INT_TICK;389 390 pmu_state = idle;391 392 if (!init_pmu()) {393 pmu_state = uninitialized;394 return 0;395 }396 397 return 1;398#endif /* !CONFIG_PPC_PMAC */399}400 401#ifdef CONFIG_ADB402static int pmu_probe(void)403{404 return pmu_state == uninitialized ? -ENODEV : 0;405}406 407static int pmu_init(void)408{409 return pmu_state == uninitialized ? -ENODEV : 0;410}411#endif /* CONFIG_ADB */412 413/*414 * We can't wait until pmu_init gets called, that happens too late.415 * It happens after IDE and SCSI initialization, which can take a few416 * seconds, and by that time the PMU could have given up on us and417 * turned us off.418 * Thus this is called with arch_initcall rather than device_initcall.419 */420static int __init via_pmu_start(void)421{422 unsigned int __maybe_unused irq;423 424 if (pmu_state == uninitialized)425 return -ENODEV;426 427 batt_req.complete = 1;428 429#ifdef CONFIG_PPC_PMAC430 irq = irq_of_parse_and_map(vias, 0);431 if (!irq) {432 printk(KERN_ERR "via-pmu: can't map interrupt\n");433 return -ENODEV;434 }435 /* We set IRQF_NO_SUSPEND because we don't want the interrupt436 * to be disabled between the 2 passes of driver suspend, we437 * control our own disabling for that one438 */439 if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,440 "VIA-PMU", (void *)0)) {441 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);442 return -ENODEV;443 }444 445 if (pmu_kind == PMU_KEYLARGO_BASED) {446 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");447 if (gpio_node == NULL)448 gpio_node = of_find_node_by_name(NULL,449 "pmu-interrupt");450 if (gpio_node)451 gpio_irq = irq_of_parse_and_map(gpio_node, 0);452 453 if (gpio_irq) {454 if (request_irq(gpio_irq, gpio1_interrupt,455 IRQF_NO_SUSPEND, "GPIO1 ADB",456 (void *)0))457 printk(KERN_ERR "pmu: can't get irq %d"458 " (GPIO1)\n", gpio_irq);459 else460 gpio_irq_enabled = 1;461 }462 }463 464 /* Enable interrupts */465 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);466#else467 if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,468 "VIA-PMU-SR", NULL)) {469 pr_err("%s: couldn't get SR irq\n", __func__);470 return -ENODEV;471 }472 if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,473 "VIA-PMU-CL", NULL)) {474 pr_err("%s: couldn't get CL irq\n", __func__);475 free_irq(IRQ_MAC_ADB_SR, NULL);476 return -ENODEV;477 }478#endif /* !CONFIG_PPC_PMAC */479 480 pmu_fully_inited = 1;481 482 /* Make sure PMU settle down before continuing. This is _very_ important483 * since the IDE probe may shut interrupts down for quite a bit of time. If484 * a PMU communication is pending while this happens, the PMU may timeout485 * Not that on Core99 machines, the PMU keeps sending us environement486 * messages, we should find a way to either fix IDE or make it call487 * pmu_suspend() before masking interrupts. This can also happens while488 * scolling with some fbdevs.489 */490 do {491 pmu_poll();492 } while (pmu_state != idle);493 494 return 0;495}496 497arch_initcall(via_pmu_start);498 499/*500 * This has to be done after pci_init, which is a subsys_initcall.501 */502static int __init via_pmu_dev_init(void)503{504 if (pmu_state == uninitialized)505 return -ENODEV;506 507#ifdef CONFIG_PMAC_BACKLIGHT508 /* Initialize backlight */509 pmu_backlight_init();510#endif511 512#ifdef CONFIG_PPC32513 if (of_machine_is_compatible("AAPL,3400/2400") ||514 of_machine_is_compatible("AAPL,3500")) {515 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,516 NULL, PMAC_MB_INFO_MODEL, 0);517 pmu_battery_count = 1;518 if (mb == PMAC_TYPE_COMET)519 pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;520 else521 pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;522 } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||523 of_machine_is_compatible("PowerBook1,1")) {524 pmu_battery_count = 2;525 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;526 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;527 } else {528 struct device_node* prim =529 of_find_node_by_name(NULL, "power-mgt");530 const u32 *prim_info = NULL;531 if (prim)532 prim_info = of_get_property(prim, "prim-info", NULL);533 if (prim_info) {534 /* Other stuffs here yet unknown */535 pmu_battery_count = (prim_info[6] >> 16) & 0xff;536 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;537 if (pmu_battery_count > 1)538 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;539 }540 of_node_put(prim);541 }542#endif /* CONFIG_PPC32 */543 544 /* Create /proc/pmu */545 proc_pmu_root = proc_mkdir("pmu", NULL);546 if (proc_pmu_root) {547 long i;548 549 for (i=0; i<pmu_battery_count; i++) {550 char title[16];551 sprintf(title, "battery_%ld", i);552 proc_pmu_batt[i] = proc_create_single_data(title, 0,553 proc_pmu_root, pmu_battery_proc_show,554 (void *)i);555 }556 557 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,558 pmu_info_proc_show);559 proc_pmu_irqstats = proc_create_single("interrupts", 0,560 proc_pmu_root, pmu_irqstats_proc_show);561 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,562 &pmu_options_proc_ops);563 }564 return 0;565}566 567device_initcall(via_pmu_dev_init);568 569static int570init_pmu(void)571{572 int timeout;573 struct adb_request req;574 575 /* Negate TREQ. Set TACK to input and TREQ to output. */576 out_8(&via2[B], in_8(&via2[B]) | TREQ);577 out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);578 579 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);580 timeout = 100000;581 while (!req.complete) {582 if (--timeout < 0) {583 printk(KERN_ERR "init_pmu: no response from PMU\n");584 return 0;585 }586 udelay(10);587 pmu_poll();588 }589 590 /* ack all pending interrupts */591 timeout = 100000;592 interrupt_data[0][0] = 1;593 while (interrupt_data[0][0] || pmu_state != idle) {594 if (--timeout < 0) {595 printk(KERN_ERR "init_pmu: timed out acking intrs\n");596 return 0;597 }598 if (pmu_state == idle)599 adb_int_pending = 1;600 via_pmu_interrupt(0, NULL);601 udelay(10);602 }603 604 /* Tell PMU we are ready. */605 if (pmu_kind == PMU_KEYLARGO_BASED) {606 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);607 while (!req.complete)608 pmu_poll();609 }610 611 /* Read PMU version */612 pmu_request(&req, NULL, 1, PMU_GET_VERSION);613 pmu_wait_complete(&req);614 if (req.reply_len > 0)615 pmu_version = req.reply[0];616 617 /* Read server mode setting */618 if (pmu_kind == PMU_KEYLARGO_BASED) {619 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,620 PMU_PWR_GET_POWERUP_EVENTS);621 pmu_wait_complete(&req);622 if (req.reply_len == 2) {623 if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)624 option_server_mode = 1;625 printk(KERN_INFO "via-pmu: Server Mode is %s\n",626 option_server_mode ? "enabled" : "disabled");627 }628 }629 630 printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",631 PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);632 633 return 1;634}635 636int637pmu_get_model(void)638{639 return pmu_kind;640}641 642static void pmu_set_server_mode(int server_mode)643{644 struct adb_request req;645 646 if (pmu_kind != PMU_KEYLARGO_BASED)647 return;648 649 option_server_mode = server_mode;650 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);651 pmu_wait_complete(&req);652 if (req.reply_len < 2)653 return;654 if (server_mode)655 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,656 PMU_PWR_SET_POWERUP_EVENTS,657 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 658 else659 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,660 PMU_PWR_CLR_POWERUP_EVENTS,661 req.reply[0], PMU_PWR_WAKEUP_AC_INSERT); 662 pmu_wait_complete(&req);663}664 665/* This new version of the code for 2400/3400/3500 powerbooks666 * is inspired from the implementation in gkrellm-pmu667 */668static void669done_battery_state_ohare(struct adb_request* req)670{671#ifdef CONFIG_PPC_PMAC672 /* format:673 * [0] : flags674 * 0x01 : AC indicator675 * 0x02 : charging676 * 0x04 : battery exist677 * 0x08 : 678 * 0x10 : 679 * 0x20 : full charged680 * 0x40 : pcharge reset681 * 0x80 : battery exist682 *683 * [1][2] : battery voltage684 * [3] : CPU temperature685 * [4] : battery temperature686 * [5] : current687 * [6][7] : pcharge688 * --tkoba689 */690 unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;691 long pcharge, charge, vb, vmax, lmax;692 long vmax_charging, vmax_charged;693 long amperage, voltage, time, max;694 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,695 NULL, PMAC_MB_INFO_MODEL, 0);696 697 if (req->reply[0] & 0x01)698 pmu_power_flags |= PMU_PWR_AC_PRESENT;699 else700 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;701 702 if (mb == PMAC_TYPE_COMET) {703 vmax_charged = 189;704 vmax_charging = 213;705 lmax = 6500;706 } else {707 vmax_charged = 330;708 vmax_charging = 330;709 lmax = 6500;710 }711 vmax = vmax_charged;712 713 /* If battery installed */714 if (req->reply[0] & 0x04) {715 bat_flags |= PMU_BATT_PRESENT;716 if (req->reply[0] & 0x02)717 bat_flags |= PMU_BATT_CHARGING;718 vb = (req->reply[1] << 8) | req->reply[2];719 voltage = (vb * 265 + 72665) / 10;720 amperage = req->reply[5];721 if ((req->reply[0] & 0x01) == 0) {722 if (amperage > 200)723 vb += ((amperage - 200) * 15)/100;724 } else if (req->reply[0] & 0x02) {725 vb = (vb * 97) / 100;726 vmax = vmax_charging;727 }728 charge = (100 * vb) / vmax;729 if (req->reply[0] & 0x40) {730 pcharge = (req->reply[6] << 8) + req->reply[7];731 if (pcharge > lmax)732 pcharge = lmax;733 pcharge *= 100;734 pcharge = 100 - pcharge / lmax;735 if (pcharge < charge)736 charge = pcharge;737 }738 if (amperage > 0)739 time = (charge * 16440) / amperage;740 else741 time = 0;742 max = 100;743 amperage = -amperage;744 } else745 charge = max = amperage = voltage = time = 0;746 747 pmu_batteries[pmu_cur_battery].flags = bat_flags;748 pmu_batteries[pmu_cur_battery].charge = charge;749 pmu_batteries[pmu_cur_battery].max_charge = max;750 pmu_batteries[pmu_cur_battery].amperage = amperage;751 pmu_batteries[pmu_cur_battery].voltage = voltage;752 pmu_batteries[pmu_cur_battery].time_remaining = time;753#endif /* CONFIG_PPC_PMAC */754 755 clear_bit(0, &async_req_locks);756}757 758static void759done_battery_state_smart(struct adb_request* req)760{761 /* format:762 * [0] : format of this structure (known: 3,4,5)763 * [1] : flags764 * 765 * format 3 & 4:766 * 767 * [2] : charge768 * [3] : max charge769 * [4] : current770 * [5] : voltage771 * 772 * format 5:773 * 774 * [2][3] : charge775 * [4][5] : max charge776 * [6][7] : current777 * [8][9] : voltage778 */779 780 unsigned int bat_flags = PMU_BATT_TYPE_SMART;781 int amperage;782 unsigned int capa, max, voltage;783 784 if (req->reply[1] & 0x01)785 pmu_power_flags |= PMU_PWR_AC_PRESENT;786 else787 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;788 789 790 capa = max = amperage = voltage = 0;791 792 if (req->reply[1] & 0x04) {793 bat_flags |= PMU_BATT_PRESENT;794 switch(req->reply[0]) {795 case 3:796 case 4: capa = req->reply[2];797 max = req->reply[3];798 amperage = *((signed char *)&req->reply[4]);799 voltage = req->reply[5];800 break;801 case 5: capa = (req->reply[2] << 8) | req->reply[3];802 max = (req->reply[4] << 8) | req->reply[5];803 amperage = *((signed short *)&req->reply[6]);804 voltage = (req->reply[8] << 8) | req->reply[9];805 break;806 default:807 pr_warn("pmu.c: unrecognized battery info, "808 "len: %d, %4ph\n", req->reply_len,809 req->reply);810 break;811 }812 }813 814 if ((req->reply[1] & 0x01) && (amperage > 0))815 bat_flags |= PMU_BATT_CHARGING;816 817 pmu_batteries[pmu_cur_battery].flags = bat_flags;818 pmu_batteries[pmu_cur_battery].charge = capa;819 pmu_batteries[pmu_cur_battery].max_charge = max;820 pmu_batteries[pmu_cur_battery].amperage = amperage;821 pmu_batteries[pmu_cur_battery].voltage = voltage;822 if (amperage) {823 if ((req->reply[1] & 0x01) && (amperage > 0))824 pmu_batteries[pmu_cur_battery].time_remaining825 = ((max-capa) * 3600) / amperage;826 else827 pmu_batteries[pmu_cur_battery].time_remaining828 = (capa * 3600) / (-amperage);829 } else830 pmu_batteries[pmu_cur_battery].time_remaining = 0;831 832 pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;833 834 clear_bit(0, &async_req_locks);835}836 837static void838query_battery_state(void)839{840 if (test_and_set_bit(0, &async_req_locks))841 return;842 if (pmu_kind == PMU_OHARE_BASED)843 pmu_request(&batt_req, done_battery_state_ohare,844 1, PMU_BATTERY_STATE);845 else846 pmu_request(&batt_req, done_battery_state_smart,847 2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);848}849 850#ifdef CONFIG_PROC_FS851static int pmu_info_proc_show(struct seq_file *m, void *v)852{853 seq_printf(m, "PMU driver version : %d\n", PMU_DRIVER_VERSION);854 seq_printf(m, "PMU firmware version : %02x\n", pmu_version);855 seq_printf(m, "AC Power : %d\n",856 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);857 seq_printf(m, "Battery count : %d\n", pmu_battery_count);858 859 return 0;860}861 862static int pmu_irqstats_proc_show(struct seq_file *m, void *v)863{864 int i;865 static const char *irq_names[NUM_IRQ_STATS] = {866 "Unknown interrupt (type 0)",867 "Unknown interrupt (type 1)",868 "PC-Card eject button",869 "Sound/Brightness button",870 "ADB message",871 "Battery state change",872 "Environment interrupt",873 "Tick timer",874 "Ghost interrupt (zero len)",875 "Empty interrupt (empty mask)",876 "Max irqs in a row",877 "Total CB1 triggered events",878 "Total GPIO1 triggered events",879 };880 881 for (i = 0; i < NUM_IRQ_STATS; i++) {882 seq_printf(m, " %2u: %10u (%s)\n",883 i, pmu_irq_stats[i], irq_names[i]);884 }885 return 0;886}887 888static int pmu_battery_proc_show(struct seq_file *m, void *v)889{890 long batnum = (long)m->private;891 892 seq_putc(m, '\n');893 seq_printf(m, "flags : %08x\n", pmu_batteries[batnum].flags);894 seq_printf(m, "charge : %d\n", pmu_batteries[batnum].charge);895 seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);896 seq_printf(m, "current : %d\n", pmu_batteries[batnum].amperage);897 seq_printf(m, "voltage : %d\n", pmu_batteries[batnum].voltage);898 seq_printf(m, "time rem. : %d\n", pmu_batteries[batnum].time_remaining);899 return 0;900}901 902static int pmu_options_proc_show(struct seq_file *m, void *v)903{904#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)905 if (pmu_kind == PMU_KEYLARGO_BASED &&906 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)907 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);908#endif909 if (pmu_kind == PMU_KEYLARGO_BASED)910 seq_printf(m, "server_mode=%d\n", option_server_mode);911 912 return 0;913}914 915static int pmu_options_proc_open(struct inode *inode, struct file *file)916{917 return single_open(file, pmu_options_proc_show, NULL);918}919 920static ssize_t pmu_options_proc_write(struct file *file,921 const char __user *buffer, size_t count, loff_t *pos)922{923 char tmp[33];924 char *label, *val;925 size_t fcount = count;926 927 if (!count)928 return -EINVAL;929 if (count > 32)930 count = 32;931 if (copy_from_user(tmp, buffer, count))932 return -EFAULT;933 tmp[count] = 0;934 935 label = tmp;936 while(*label == ' ')937 label++;938 val = label;939 while(*val && (*val != '=')) {940 if (*val == ' ')941 *val = 0;942 val++;943 }944 if ((*val) == 0)945 return -EINVAL;946 *(val++) = 0;947 while(*val == ' ')948 val++;949#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)950 if (pmu_kind == PMU_KEYLARGO_BASED &&951 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)952 if (!strcmp(label, "lid_wakeup"))953 option_lid_wakeup = ((*val) == '1');954#endif955 if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {956 int new_value;957 new_value = ((*val) == '1');958 if (new_value != option_server_mode)959 pmu_set_server_mode(new_value);960 }961 return fcount;962}963 964static const struct proc_ops pmu_options_proc_ops = {965 .proc_open = pmu_options_proc_open,966 .proc_read = seq_read,967 .proc_lseek = seq_lseek,968 .proc_release = single_release,969 .proc_write = pmu_options_proc_write,970};971#endif972 973#ifdef CONFIG_ADB974/* Send an ADB command */975static int pmu_send_request(struct adb_request *req, int sync)976{977 int i, ret;978 979 if (pmu_state == uninitialized || !pmu_fully_inited) {980 req->complete = 1;981 return -ENXIO;982 }983 984 ret = -EINVAL;985 986 switch (req->data[0]) {987 case PMU_PACKET:988 for (i = 0; i < req->nbytes - 1; ++i)989 req->data[i] = req->data[i+1];990 --req->nbytes;991 if (pmu_data_len[req->data[0]][1] != 0) {992 req->reply[0] = ADB_RET_OK;993 req->reply_len = 1;994 } else995 req->reply_len = 0;996 ret = pmu_queue_request(req);997 break;998 case CUDA_PACKET:999 switch (req->data[1]) {1000 case CUDA_GET_TIME:1001 if (req->nbytes != 2)1002 break;1003 req->data[0] = PMU_READ_RTC;1004 req->nbytes = 1;1005 req->reply_len = 3;1006 req->reply[0] = CUDA_PACKET;1007 req->reply[1] = 0;1008 req->reply[2] = CUDA_GET_TIME;1009 ret = pmu_queue_request(req);1010 break;1011 case CUDA_SET_TIME:1012 if (req->nbytes != 6)1013 break;1014 req->data[0] = PMU_SET_RTC;1015 req->nbytes = 5;1016 for (i = 1; i <= 4; ++i)1017 req->data[i] = req->data[i+1];1018 req->reply_len = 3;1019 req->reply[0] = CUDA_PACKET;1020 req->reply[1] = 0;1021 req->reply[2] = CUDA_SET_TIME;1022 ret = pmu_queue_request(req);1023 break;1024 }1025 break;1026 case ADB_PACKET:1027 if (!pmu_has_adb)1028 return -ENXIO;1029 for (i = req->nbytes - 1; i > 1; --i)1030 req->data[i+2] = req->data[i];1031 req->data[3] = req->nbytes - 2;1032 req->data[2] = pmu_adb_flags;1033 /*req->data[1] = req->data[1];*/1034 req->data[0] = PMU_ADB_CMD;1035 req->nbytes += 2;1036 req->reply_expected = 1;1037 req->reply_len = 0;1038 ret = pmu_queue_request(req);1039 break;1040 }1041 if (ret) {1042 req->complete = 1;1043 return ret;1044 }1045 1046 if (sync)1047 while (!req->complete)1048 pmu_poll();1049 1050 return 0;1051}1052 1053/* Enable/disable autopolling */1054static int __pmu_adb_autopoll(int devs)1055{1056 struct adb_request req;1057 1058 if (devs) {1059 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,1060 adb_dev_map >> 8, adb_dev_map);1061 pmu_adb_flags = 2;1062 } else {1063 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);1064 pmu_adb_flags = 0;1065 }1066 while (!req.complete)1067 pmu_poll();1068 return 0;1069}1070 1071static int pmu_adb_autopoll(int devs)1072{1073 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)1074 return -ENXIO;1075 1076 adb_dev_map = devs;1077 return __pmu_adb_autopoll(devs);1078}1079 1080/* Reset the ADB bus */1081static int pmu_adb_reset_bus(void)1082{1083 struct adb_request req;1084 int save_autopoll = adb_dev_map;1085 1086 if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)1087 return -ENXIO;1088 1089 /* anyone got a better idea?? */1090 __pmu_adb_autopoll(0);1091 1092 req.nbytes = 4;1093 req.done = NULL;1094 req.data[0] = PMU_ADB_CMD;1095 req.data[1] = ADB_BUSRESET;1096 req.data[2] = 0;1097 req.data[3] = 0;1098 req.data[4] = 0;1099 req.reply_len = 0;1100 req.reply_expected = 1;1101 if (pmu_queue_request(&req) != 0) {1102 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");1103 return -EIO;1104 }1105 pmu_wait_complete(&req);1106 1107 if (save_autopoll != 0)1108 __pmu_adb_autopoll(save_autopoll);1109 1110 return 0;1111}1112#endif /* CONFIG_ADB */1113 1114/* Construct and send a pmu request */1115int1116pmu_request(struct adb_request *req, void (*done)(struct adb_request *),1117 int nbytes, ...)1118{1119 va_list list;1120 int i;1121 1122 if (pmu_state == uninitialized)1123 return -ENXIO;1124 1125 if (nbytes < 0 || nbytes > 32) {1126 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);1127 req->complete = 1;1128 return -EINVAL;1129 }1130 req->nbytes = nbytes;1131 req->done = done;1132 va_start(list, nbytes);1133 for (i = 0; i < nbytes; ++i)1134 req->data[i] = va_arg(list, int);1135 va_end(list);1136 req->reply_len = 0;1137 req->reply_expected = 0;1138 return pmu_queue_request(req);1139}1140 1141int1142pmu_queue_request(struct adb_request *req)1143{1144 unsigned long flags;1145 int nsend;1146 1147 if (pmu_state == uninitialized) {1148 req->complete = 1;1149 return -ENXIO;1150 }1151 if (req->nbytes <= 0) {1152 req->complete = 1;1153 return 0;1154 }1155 nsend = pmu_data_len[req->data[0]][0];1156 if (nsend >= 0 && req->nbytes != nsend + 1) {1157 req->complete = 1;1158 return -EINVAL;1159 }1160 1161 req->next = NULL;1162 req->sent = 0;1163 req->complete = 0;1164 1165 spin_lock_irqsave(&pmu_lock, flags);1166 if (current_req) {1167 last_req->next = req;1168 last_req = req;1169 } else {1170 current_req = req;1171 last_req = req;1172 if (pmu_state == idle)1173 pmu_start();1174 }1175 spin_unlock_irqrestore(&pmu_lock, flags);1176 1177 return 0;1178}1179 1180static inline void1181wait_for_ack(void)1182{1183 /* Sightly increased the delay, I had one occurrence of the message1184 * reported1185 */1186 int timeout = 4000;1187 while ((in_8(&via2[B]) & TACK) == 0) {1188 if (--timeout < 0) {1189 printk(KERN_ERR "PMU not responding (!ack)\n");1190 return;1191 }1192 udelay(10);1193 }1194}1195 1196/* New PMU seems to be very sensitive to those timings, so we make sure1197 * PCI is flushed immediately */1198static inline void1199send_byte(int x)1200{1201 out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);1202 out_8(&via1[SR], x);1203 out_8(&via2[B], in_8(&via2[B]) & ~TREQ); /* assert TREQ */1204 (void)in_8(&via2[B]);1205}1206 1207static inline void1208recv_byte(void)1209{1210 out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);1211 in_8(&via1[SR]); /* resets SR */1212 out_8(&via2[B], in_8(&via2[B]) & ~TREQ);1213 (void)in_8(&via2[B]);1214}1215 1216static inline void1217pmu_done(struct adb_request *req)1218{1219 void (*done)(struct adb_request *) = req->done;1220 mb();1221 req->complete = 1;1222 /* Here, we assume that if the request has a done member, the1223 * struct request will survive to setting req->complete to 11224 */1225 if (done)1226 (*done)(req);1227}1228 1229static void1230pmu_start(void)1231{1232 struct adb_request *req;1233 1234 /* assert pmu_state == idle */1235 /* get the packet to send */1236 req = current_req;1237 if (!req || pmu_state != idle1238 || (/*req->reply_expected && */req_awaiting_reply))1239 return;1240 1241 pmu_state = sending;1242 data_index = 1;1243 data_len = pmu_data_len[req->data[0]][0];1244 1245 /* Sounds safer to make sure ACK is high before writing. This helped1246 * kill a problem with ADB and some iBooks1247 */1248 wait_for_ack();1249 /* set the shift register to shift out and send a byte */1250 send_byte(req->data[0]);1251}1252 1253void1254pmu_poll(void)1255{1256 if (pmu_state == uninitialized)1257 return;1258 if (disable_poll)1259 return;1260 via_pmu_interrupt(0, NULL);1261}1262 1263void1264pmu_poll_adb(void)1265{1266 if (pmu_state == uninitialized)1267 return;1268 if (disable_poll)1269 return;1270 /* Kicks ADB read when PMU is suspended */1271 adb_int_pending = 1;1272 do {1273 via_pmu_interrupt(0, NULL);1274 } while (pmu_suspended && (adb_int_pending || pmu_state != idle1275 || req_awaiting_reply));1276}1277 1278void1279pmu_wait_complete(struct adb_request *req)1280{1281 if (pmu_state == uninitialized)1282 return;1283 while((pmu_state != idle && pmu_state != locked) || !req->complete)1284 via_pmu_interrupt(0, NULL);1285}1286 1287/* This function loops until the PMU is idle and prevents it from1288 * anwsering to ADB interrupts. pmu_request can still be called.1289 * This is done to avoid spurrious shutdowns when we know we'll have1290 * interrupts switched off for a long time1291 */1292void1293pmu_suspend(void)1294{1295 unsigned long flags;1296 1297 if (pmu_state == uninitialized)1298 return;1299 1300 spin_lock_irqsave(&pmu_lock, flags);1301 pmu_suspended++;1302 if (pmu_suspended > 1) {1303 spin_unlock_irqrestore(&pmu_lock, flags);1304 return;1305 }1306 1307 do {1308 spin_unlock_irqrestore(&pmu_lock, flags);1309 if (req_awaiting_reply)1310 adb_int_pending = 1;1311 via_pmu_interrupt(0, NULL);1312 spin_lock_irqsave(&pmu_lock, flags);1313 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {1314 if (gpio_irq >= 0)1315 disable_irq_nosync(gpio_irq);1316 out_8(&via1[IER], CB1_INT | IER_CLR);1317 spin_unlock_irqrestore(&pmu_lock, flags);1318 break;1319 }1320 } while (1);1321}1322 1323void1324pmu_resume(void)1325{1326 unsigned long flags;1327 1328 if (pmu_state == uninitialized || pmu_suspended < 1)1329 return;1330 1331 spin_lock_irqsave(&pmu_lock, flags);1332 pmu_suspended--;1333 if (pmu_suspended > 0) {1334 spin_unlock_irqrestore(&pmu_lock, flags);1335 return;1336 }1337 adb_int_pending = 1;1338 if (gpio_irq >= 0)1339 enable_irq(gpio_irq);1340 out_8(&via1[IER], CB1_INT | IER_SET);1341 spin_unlock_irqrestore(&pmu_lock, flags);1342 pmu_poll();1343}1344 1345/* Interrupt data could be the result data from an ADB cmd */1346static void1347pmu_handle_data(unsigned char *data, int len)1348{1349 unsigned char ints;1350 int idx;1351 int i = 0;1352 1353 asleep = 0;1354 if (drop_interrupts || len < 1) {1355 adb_int_pending = 0;1356 pmu_irq_stats[8]++;1357 return;1358 }1359 1360 /* Get PMU interrupt mask */1361 ints = data[0];1362 1363 /* Record zero interrupts for stats */1364 if (ints == 0)1365 pmu_irq_stats[9]++;1366 1367 /* Hack to deal with ADB autopoll flag */1368 if (ints & PMU_INT_ADB)1369 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);1370 1371next:1372 if (ints == 0) {1373 if (i > pmu_irq_stats[10])1374 pmu_irq_stats[10] = i;1375 return;1376 }1377 i++;1378 1379 idx = ffs(ints) - 1;1380 ints &= ~BIT(idx);1381 1382 pmu_irq_stats[idx]++;1383 1384 /* Note: for some reason, we get an interrupt with len=1,1385 * data[0]==0 after each normal ADB interrupt, at least1386 * on the Pismo. Still investigating... --BenH1387 */1388 switch (BIT(idx)) {1389 case PMU_INT_ADB:1390 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {1391 struct adb_request *req = req_awaiting_reply;1392 if (!req) {1393 printk(KERN_ERR "PMU: extra ADB reply\n");1394 return;1395 }1396 req_awaiting_reply = NULL;1397 if (len <= 2)1398 req->reply_len = 0;1399 else {1400 memcpy(req->reply, data + 1, len - 1);1401 req->reply_len = len - 1;1402 }1403 pmu_done(req);1404 } else {1405#ifdef CONFIG_XMON1406 if (len == 4 && data[1] == 0x2c) {1407 extern int xmon_wants_key, xmon_adb_keycode;1408 if (xmon_wants_key) {1409 xmon_adb_keycode = data[2];1410 return;1411 }1412 }1413#endif /* CONFIG_XMON */1414#ifdef CONFIG_ADB1415 /*1416 * XXX On the [23]400 the PMU gives us an up1417 * event for keycodes 0x74 or 0x75 when the PC1418 * card eject buttons are released, so we1419 * ignore those events.1420 */1421 if (!(pmu_kind == PMU_OHARE_BASED && len == 41422 && data[1] == 0x2c && data[3] == 0xff1423 && (data[2] & ~1) == 0xf4))1424 adb_input(data+1, len-1, 1);1425#endif /* CONFIG_ADB */ 1426 }1427 break;1428 1429 /* Sound/brightness button pressed */1430 case PMU_INT_SNDBRT:1431#ifdef CONFIG_PMAC_BACKLIGHT1432 if (len == 3)1433 pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);1434#endif1435 break;1436 1437 /* Tick interrupt */1438 case PMU_INT_TICK:1439 /* Environment or tick interrupt, query batteries */1440 if (pmu_battery_count) {1441 if ((--query_batt_timer) == 0) {1442 query_battery_state();1443 query_batt_timer = BATTERY_POLLING_COUNT;1444 }1445 }1446 break;1447 1448 case PMU_INT_ENVIRONMENT:1449 if (pmu_battery_count)1450 query_battery_state();1451 pmu_pass_intr(data, len);1452 /* len == 6 is probably a bad check. But how do I1453 * know what PMU versions send what events here? */1454 if (IS_ENABLED(CONFIG_ADB_PMU_EVENT) && len == 6) {1455 via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));1456 via_pmu_event(PMU_EVT_LID, data[1]&1);1457 }1458 break;1459 1460 default:1461 pmu_pass_intr(data, len);1462 }1463 goto next;1464}1465 1466static struct adb_request*1467pmu_sr_intr(void)1468{1469 struct adb_request *req;1470 int bite = 0;1471 1472 if (in_8(&via2[B]) & TREQ) {1473 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));1474 return NULL;1475 }1476 /* The ack may not yet be low when we get the interrupt */1477 while ((in_8(&via2[B]) & TACK) != 0)1478 ;1479 1480 /* if reading grab the byte, and reset the interrupt */1481 if (pmu_state == reading || pmu_state == reading_intr)1482 bite = in_8(&via1[SR]);1483 1484 /* reset TREQ and wait for TACK to go high */1485 out_8(&via2[B], in_8(&via2[B]) | TREQ);1486 wait_for_ack();1487 1488 switch (pmu_state) {1489 case sending:1490 req = current_req;1491 if (data_len < 0) {1492 data_len = req->nbytes - 1;1493 send_byte(data_len);1494 break;1495 }1496 if (data_index <= data_len) {1497 send_byte(req->data[data_index++]);1498 break;1499 }1500 req->sent = 1;1501 data_len = pmu_data_len[req->data[0]][1];1502 if (data_len == 0) {1503 pmu_state = idle;1504 current_req = req->next;1505 if (req->reply_expected)1506 req_awaiting_reply = req;1507 else1508 return req;1509 } else {1510 pmu_state = reading;1511 data_index = 0;1512 reply_ptr = req->reply + req->reply_len;1513 recv_byte();1514 }1515 break;1516 1517 case intack:1518 data_index = 0;1519 data_len = -1;1520 pmu_state = reading_intr;1521 reply_ptr = interrupt_data[int_data_last];1522 recv_byte();1523 if (gpio_irq >= 0 && !gpio_irq_enabled) {1524 enable_irq(gpio_irq);1525 gpio_irq_enabled = 1;1526 }1527 break;1528 1529 case reading:1530 case reading_intr:1531 if (data_len == -1) {1532 data_len = bite;1533 if (bite > 32)1534 printk(KERN_ERR "PMU: bad reply len %d\n", bite);1535 } else if (data_index < 32) {1536 reply_ptr[data_index++] = bite;1537 }1538 if (data_index < data_len) {1539 recv_byte();1540 break;1541 }1542 1543 if (pmu_state == reading_intr) {1544 pmu_state = idle;1545 int_data_state[int_data_last] = int_data_ready;1546 interrupt_data_len[int_data_last] = data_len;1547 } else {1548 req = current_req;1549 /* 1550 * For PMU sleep and freq change requests, we lock the1551 * PMU until it's explicitly unlocked. This avoids any1552 * spurrious event polling getting in1553 */1554 current_req = req->next;1555 req->reply_len += data_index;1556 if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)1557 pmu_state = locked;1558 else1559 pmu_state = idle;1560 return req;1561 }1562 break;1563 1564 default:1565 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",1566 pmu_state);1567 }1568 return NULL;1569}1570 1571static irqreturn_t1572via_pmu_interrupt(int irq, void *arg)1573{1574 unsigned long flags;1575 int intr;1576 int nloop = 0;1577 int int_data = -1;1578 struct adb_request *req = NULL;1579 int handled = 0;1580 1581 /* This is a bit brutal, we can probably do better */1582 spin_lock_irqsave(&pmu_lock, flags);1583 ++disable_poll;1584 1585 for (;;) {1586 /* On 68k Macs, VIA interrupts are dispatched individually.1587 * Unless we are polling, the relevant IRQ flag has already1588 * been cleared.1589 */1590 intr = 0;1591 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {1592 intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);1593 out_8(&via1[IFR], intr);1594 }1595#ifndef CONFIG_PPC_PMAC1596 switch (irq) {1597 case IRQ_MAC_ADB_CL:1598 intr = CB1_INT;1599 break;1600 case IRQ_MAC_ADB_SR:1601 intr = SR_INT;1602 break;1603 }1604#endif1605 if (intr == 0)1606 break;1607 handled = 1;1608 if (++nloop > 1000) {1609 printk(KERN_DEBUG "PMU: stuck in intr loop, "1610 "intr=%x, ier=%x pmu_state=%d\n",1611 intr, in_8(&via1[IER]), pmu_state);1612 break;1613 }1614 if (intr & CB1_INT) {1615 adb_int_pending = 1;1616 pmu_irq_stats[11]++;1617 }1618 if (intr & SR_INT) {1619 req = pmu_sr_intr();1620 if (req)1621 break;1622 }1623#ifndef CONFIG_PPC_PMAC1624 break;1625#endif1626 }1627 1628recheck:1629 if (pmu_state == idle) {1630 if (adb_int_pending) {1631 if (int_data_state[0] == int_data_empty)1632 int_data_last = 0;1633 else if (int_data_state[1] == int_data_empty)1634 int_data_last = 1;1635 else1636 goto no_free_slot;1637 pmu_state = intack;1638 int_data_state[int_data_last] = int_data_fill;1639 /* Sounds safer to make sure ACK is high before writing.1640 * This helped kill a problem with ADB and some iBooks1641 */1642 wait_for_ack();1643 send_byte(PMU_INT_ACK);1644 adb_int_pending = 0;1645 } else if (current_req)1646 pmu_start();1647 }1648no_free_slot: 1649 /* Mark the oldest buffer for flushing */1650 if (int_data_state[!int_data_last] == int_data_ready) {1651 int_data_state[!int_data_last] = int_data_flush;1652 int_data = !int_data_last;1653 } else if (int_data_state[int_data_last] == int_data_ready) {1654 int_data_state[int_data_last] = int_data_flush;1655 int_data = int_data_last;1656 }1657 --disable_poll;1658 spin_unlock_irqrestore(&pmu_lock, flags);1659 1660 /* Deal with completed PMU requests outside of the lock */1661 if (req) {1662 pmu_done(req);1663 req = NULL;1664 }1665 1666 /* Deal with interrupt datas outside of the lock */1667 if (int_data >= 0) {1668 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);1669 spin_lock_irqsave(&pmu_lock, flags);1670 ++disable_poll;1671 int_data_state[int_data] = int_data_empty;1672 int_data = -1;1673 goto recheck;1674 }1675 1676 return IRQ_RETVAL(handled);1677}1678 1679void1680pmu_unlock(void)1681{1682 unsigned long flags;1683 1684 spin_lock_irqsave(&pmu_lock, flags);1685 if (pmu_state == locked)1686 pmu_state = idle;1687 adb_int_pending = 1;1688 spin_unlock_irqrestore(&pmu_lock, flags);1689}1690 1691 1692static __maybe_unused irqreturn_t1693gpio1_interrupt(int irq, void *arg)1694{1695 unsigned long flags;1696 1697 if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {1698 spin_lock_irqsave(&pmu_lock, flags);1699 if (gpio_irq_enabled > 0) {1700 disable_irq_nosync(gpio_irq);1701 gpio_irq_enabled = 0;1702 }1703 pmu_irq_stats[12]++;1704 adb_int_pending = 1;1705 spin_unlock_irqrestore(&pmu_lock, flags);1706 via_pmu_interrupt(0, NULL);1707 return IRQ_HANDLED;1708 }1709 return IRQ_NONE;1710}1711 1712void1713pmu_enable_irled(int on)1714{1715 struct adb_request req;1716 1717 if (pmu_state == uninitialized)1718 return ;1719 if (pmu_kind == PMU_KEYLARGO_BASED)1720 return ;1721 1722 pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |1723 (on ? PMU_POW_ON : PMU_POW_OFF));1724 pmu_wait_complete(&req);1725}1726 1727/* Offset between Unix time (1970-based) and Mac time (1904-based) */1728#define RTC_OFFSET 20828448001729 1730time64_t pmu_get_time(void)1731{1732 struct adb_request req;1733 u32 now;1734 1735 if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)1736 return 0;1737 pmu_wait_complete(&req);1738 if (req.reply_len != 4)1739 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);1740 now = (req.reply[0] << 24) + (req.reply[1] << 16) +1741 (req.reply[2] << 8) + req.reply[3];1742 return (time64_t)now - RTC_OFFSET;1743}1744 1745int pmu_set_rtc_time(struct rtc_time *tm)1746{1747 u32 now;1748 struct adb_request req;1749 1750 now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);1751 if (pmu_request(&req, NULL, 5, PMU_SET_RTC,1752 now >> 24, now >> 16, now >> 8, now) < 0)1753 return -ENXIO;1754 pmu_wait_complete(&req);1755 if (req.reply_len != 0)1756 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);1757 return 0;1758}1759 1760void1761pmu_restart(void)1762{1763 struct adb_request req;1764 1765 if (pmu_state == uninitialized)1766 return;1767 1768 local_irq_disable();1769 1770 drop_interrupts = 1;1771 1772 if (pmu_kind != PMU_KEYLARGO_BASED) {1773 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |1774 PMU_INT_TICK );1775 while(!req.complete)1776 pmu_poll();1777 }1778 1779 pmu_request(&req, NULL, 1, PMU_RESET);1780 pmu_wait_complete(&req);1781 for (;;)1782 ;1783}1784 1785void1786pmu_shutdown(void)1787{1788 struct adb_request req;1789 1790 if (pmu_state == uninitialized)1791 return;1792 1793 local_irq_disable();1794 1795 drop_interrupts = 1;1796 1797 if (pmu_kind != PMU_KEYLARGO_BASED) {1798 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |1799 PMU_INT_TICK );1800 pmu_wait_complete(&req);1801 } else {1802 /* Disable server mode on shutdown or we'll just1803 * wake up again1804 */1805 pmu_set_server_mode(0);1806 }1807 1808 pmu_request(&req, NULL, 5, PMU_SHUTDOWN,1809 'M', 'A', 'T', 'T');1810 pmu_wait_complete(&req);1811 for (;;)1812 ;1813}1814 1815int1816pmu_present(void)1817{1818 return pmu_state != uninitialized;1819}1820 1821#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)1822/*1823 * Put the powerbook to sleep.1824 */1825 1826static u32 save_via[8];1827static int __fake_sleep;1828 1829static void1830save_via_state(void)1831{1832 save_via[0] = in_8(&via1[ANH]);1833 save_via[1] = in_8(&via1[DIRA]);1834 save_via[2] = in_8(&via1[B]);1835 save_via[3] = in_8(&via1[DIRB]);1836 save_via[4] = in_8(&via1[PCR]);1837 save_via[5] = in_8(&via1[ACR]);1838 save_via[6] = in_8(&via1[T1CL]);1839 save_via[7] = in_8(&via1[T1CH]);1840}1841static void1842restore_via_state(void)1843{1844 out_8(&via1[ANH], save_via[0]);1845 out_8(&via1[DIRA], save_via[1]);1846 out_8(&via1[B], save_via[2]);1847 out_8(&via1[DIRB], save_via[3]);1848 out_8(&via1[PCR], save_via[4]);1849 out_8(&via1[ACR], save_via[5]);1850 out_8(&via1[T1CL], save_via[6]);1851 out_8(&via1[T1CH], save_via[7]);1852 out_8(&via1[IER], IER_CLR | 0x7f); /* disable all intrs */1853 out_8(&via1[IFR], 0x7f); /* clear IFR */1854 out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);1855}1856 1857#define GRACKLE_PM (1<<7)1858#define GRACKLE_DOZE (1<<5)1859#define GRACKLE_NAP (1<<4)1860#define GRACKLE_SLEEP (1<<3)1861 1862static int powerbook_sleep_grackle(void)1863{1864 unsigned long save_l2cr;1865 unsigned short pmcr1;1866 struct adb_request req;1867 struct pci_dev *grackle;1868 1869 grackle = pci_get_domain_bus_and_slot(0, 0, 0);1870 if (!grackle)1871 return -ENODEV;1872 1873 /* Turn off various things. Darwin does some retry tests here... */1874 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);1875 pmu_wait_complete(&req);1876 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,1877 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);1878 pmu_wait_complete(&req);1879 1880 /* For 750, save backside cache setting and disable it */1881 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */1882 1883 if (!__fake_sleep) {1884 /* Ask the PMU to put us to sleep */1885 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');1886 pmu_wait_complete(&req);1887 }1888 1889 /* The VIA is supposed not to be restored correctly*/1890 save_via_state();1891 /* We shut down some HW */1892 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);1893 1894 pci_read_config_word(grackle, 0x70, &pmcr1);1895 /* Apparently, MacOS uses NAP mode for Grackle ??? */1896 pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 1897 pmcr1 |= GRACKLE_PM|GRACKLE_NAP;1898 pci_write_config_word(grackle, 0x70, pmcr1);1899 1900 /* Call low-level ASM sleep handler */1901 if (__fake_sleep)1902 mdelay(5000);1903 else1904 low_sleep_handler();1905 1906 /* We're awake again, stop grackle PM */1907 pci_read_config_word(grackle, 0x70, &pmcr1);1908 pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 1909 pci_write_config_word(grackle, 0x70, pmcr1);1910 1911 pci_dev_put(grackle);1912 1913 /* Make sure the PMU is idle */1914 pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);1915 restore_via_state();1916 1917 /* Restore L2 cache */1918 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)1919 _set_L2CR(save_l2cr);1920 1921 /* Restore userland MMU context */1922 switch_mmu_context(NULL, current->active_mm, NULL);1923 1924 /* Power things up */1925 pmu_unlock();1926 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);1927 pmu_wait_complete(&req);1928 pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,1929 PMU_POW0_ON|PMU_POW0_HARD_DRIVE);1930 pmu_wait_complete(&req);1931 pmu_request(&req, NULL, 2, PMU_POWER_CTRL,1932 PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);1933 pmu_wait_complete(&req);1934 1935 return 0;1936}1937 1938static int1939powerbook_sleep_Core99(void)1940{1941 unsigned long save_l2cr;1942 unsigned long save_l3cr;1943 struct adb_request req;1944 1945 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {1946 printk(KERN_ERR "Sleep mode not supported on this machine\n");1947 return -ENOSYS;1948 }1949 1950 if (num_online_cpus() > 1 || cpu_is_offline(0))1951 return -EAGAIN;1952 1953 /* Stop environment and ADB interrupts */1954 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);1955 pmu_wait_complete(&req);1956 1957 /* Tell PMU what events will wake us up */1958 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,1959 0xff, 0xff);1960 pmu_wait_complete(&req);1961 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,1962 0, PMU_PWR_WAKEUP_KEY |1963 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));1964 pmu_wait_complete(&req);1965 1966 /* Save the state of the L2 and L3 caches */1967 save_l3cr = _get_L3CR(); /* (returns -1 if not available) */1968 save_l2cr = _get_L2CR(); /* (returns -1 if not available) */1969 1970 if (!__fake_sleep) {1971 /* Ask the PMU to put us to sleep */1972 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');1973 pmu_wait_complete(&req);1974 }1975 1976 /* The VIA is supposed not to be restored correctly*/1977 save_via_state();1978 1979 /* Shut down various ASICs. There's a chance that we can no longer1980 * talk to the PMU after this, so I moved it to _after_ sending the1981 * sleep command to it. Still need to be checked.1982 */1983 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);1984 1985 /* Call low-level ASM sleep handler */1986 if (__fake_sleep)1987 mdelay(5000);1988 else1989 low_sleep_handler();1990 1991 /* Restore Apple core ASICs state */1992 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);1993 1994 /* Restore VIA */1995 restore_via_state();1996 1997 /* tweak LPJ before cpufreq is there */1998 loops_per_jiffy *= 2;1999 2000 /* Restore video */2001 pmac_call_early_video_resume();2002 2003 /* Restore L2 cache */2004 if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)2005 _set_L2CR(save_l2cr);2006 /* Restore L3 cache */2007 if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)2008 _set_L3CR(save_l3cr);2009 2010 /* Restore userland MMU context */2011 switch_mmu_context(NULL, current->active_mm, NULL);2012 2013 /* Tell PMU we are ready */2014 pmu_unlock();2015 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);2016 pmu_wait_complete(&req);2017 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);2018 pmu_wait_complete(&req);2019 2020 /* Restore LPJ, cpufreq will adjust the cpu frequency */2021 loops_per_jiffy /= 2;2022 2023 return 0;2024}2025 2026#define PB3400_MEM_CTRL 0xf80000002027#define PB3400_MEM_CTRL_SLEEP 0x702028 2029static void __iomem *pb3400_mem_ctrl;2030 2031static void powerbook_sleep_init_3400(void)2032{2033 /* map in the memory controller registers */2034 pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);2035 if (pb3400_mem_ctrl == NULL)2036 printk(KERN_WARNING "ioremap failed: sleep won't be possible");2037}2038 2039static int powerbook_sleep_3400(void)2040{2041 int i, x;2042 unsigned int hid0;2043 unsigned long msr;2044 struct adb_request sleep_req;2045 unsigned int __iomem *mem_ctrl_sleep;2046 2047 if (pb3400_mem_ctrl == NULL)2048 return -ENOMEM;2049 mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;2050 2051 /* Set the memory controller to keep the memory refreshed2052 while we're asleep */2053 for (i = 0x403f; i >= 0x4000; --i) {2054 out_be32(mem_ctrl_sleep, i);2055 do {2056 x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;2057 } while (x == 0);2058 if (x >= 0x100)2059 break;2060 }2061 2062 /* Ask the PMU to put us to sleep */2063 pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');2064 pmu_wait_complete(&sleep_req);2065 pmu_unlock();2066 2067 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);2068 2069 asleep = 1;2070 2071 /* Put the CPU into sleep mode */2072 hid0 = mfspr(SPRN_HID0);2073 hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;2074 mtspr(SPRN_HID0, hid0);2075 local_irq_enable();2076 msr = mfmsr() | MSR_POW;2077 while (asleep) {2078 mb();2079 mtmsr(msr);2080 isync();2081 }2082 local_irq_disable();2083 2084 /* OK, we're awake again, start restoring things */2085 out_be32(mem_ctrl_sleep, 0x3f);2086 pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);2087 2088 return 0;2089}2090 2091#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */2092 2093/*2094 * Support for /dev/pmu device2095 */2096#define RB_SIZE 0x102097struct pmu_private {2098 struct list_head list;2099 int rb_get;2100 int rb_put;2101 struct rb_entry {2102 unsigned short len;2103 unsigned char data[16];2104 } rb_buf[RB_SIZE];2105 wait_queue_head_t wait;2106 spinlock_t lock;2107#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)2108 int backlight_locker;2109#endif2110};2111 2112static LIST_HEAD(all_pmu_pvt);2113static DEFINE_SPINLOCK(all_pvt_lock);2114 2115static void2116pmu_pass_intr(unsigned char *data, int len)2117{2118 struct pmu_private *pp;2119 struct list_head *list;2120 int i;2121 unsigned long flags;2122 2123 if (len > sizeof(pp->rb_buf[0].data))2124 len = sizeof(pp->rb_buf[0].data);2125 spin_lock_irqsave(&all_pvt_lock, flags);2126 for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {2127 pp = list_entry(list, struct pmu_private, list);2128 spin_lock(&pp->lock);2129 i = pp->rb_put + 1;2130 if (i >= RB_SIZE)2131 i = 0;2132 if (i != pp->rb_get) {2133 struct rb_entry *rp = &pp->rb_buf[pp->rb_put];2134 rp->len = len;2135 memcpy(rp->data, data, len);2136 pp->rb_put = i;2137 wake_up_interruptible(&pp->wait);2138 }2139 spin_unlock(&pp->lock);2140 }2141 spin_unlock_irqrestore(&all_pvt_lock, flags);2142}2143 2144static int2145pmu_open(struct inode *inode, struct file *file)2146{2147 struct pmu_private *pp;2148 unsigned long flags;2149 2150 pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);2151 if (!pp)2152 return -ENOMEM;2153 pp->rb_get = pp->rb_put = 0;2154 spin_lock_init(&pp->lock);2155 init_waitqueue_head(&pp->wait);2156 mutex_lock(&pmu_info_proc_mutex);2157 spin_lock_irqsave(&all_pvt_lock, flags);2158#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)2159 pp->backlight_locker = 0;2160#endif2161 list_add(&pp->list, &all_pmu_pvt);2162 spin_unlock_irqrestore(&all_pvt_lock, flags);2163 file->private_data = pp;2164 mutex_unlock(&pmu_info_proc_mutex);2165 return 0;2166}2167 2168static ssize_t 2169pmu_read(struct file *file, char __user *buf,2170 size_t count, loff_t *ppos)2171{2172 struct pmu_private *pp = file->private_data;2173 DECLARE_WAITQUEUE(wait, current);2174 unsigned long flags;2175 int ret = 0;2176 2177 if (count < 1 || !pp)2178 return -EINVAL;2179 2180 spin_lock_irqsave(&pp->lock, flags);2181 add_wait_queue(&pp->wait, &wait);2182 set_current_state(TASK_INTERRUPTIBLE);2183 2184 for (;;) {2185 ret = -EAGAIN;2186 if (pp->rb_get != pp->rb_put) {2187 int i = pp->rb_get;2188 struct rb_entry *rp = &pp->rb_buf[i];2189 ret = rp->len;2190 spin_unlock_irqrestore(&pp->lock, flags);2191 if (ret > count)2192 ret = count;2193 if (ret > 0 && copy_to_user(buf, rp->data, ret))2194 ret = -EFAULT;2195 if (++i >= RB_SIZE)2196 i = 0;2197 spin_lock_irqsave(&pp->lock, flags);2198 pp->rb_get = i;2199 }2200 if (ret >= 0)2201 break;2202 if (file->f_flags & O_NONBLOCK)2203 break;2204 ret = -ERESTARTSYS;2205 if (signal_pending(current))2206 break;2207 spin_unlock_irqrestore(&pp->lock, flags);2208 schedule();2209 spin_lock_irqsave(&pp->lock, flags);2210 }2211 __set_current_state(TASK_RUNNING);2212 remove_wait_queue(&pp->wait, &wait);2213 spin_unlock_irqrestore(&pp->lock, flags);2214 2215 return ret;2216}2217 2218static ssize_t2219pmu_write(struct file *file, const char __user *buf,2220 size_t count, loff_t *ppos)2221{2222 return 0;2223}2224 2225static __poll_t2226pmu_fpoll(struct file *filp, poll_table *wait)2227{2228 struct pmu_private *pp = filp->private_data;2229 __poll_t mask = 0;2230 unsigned long flags;2231 2232 if (!pp)2233 return 0;2234 poll_wait(filp, &pp->wait, wait);2235 spin_lock_irqsave(&pp->lock, flags);2236 if (pp->rb_get != pp->rb_put)2237 mask |= EPOLLIN;2238 spin_unlock_irqrestore(&pp->lock, flags);2239 return mask;2240}2241 2242static int2243pmu_release(struct inode *inode, struct file *file)2244{2245 struct pmu_private *pp = file->private_data;2246 unsigned long flags;2247 2248 if (pp) {2249 file->private_data = NULL;2250 spin_lock_irqsave(&all_pvt_lock, flags);2251 list_del(&pp->list);2252 spin_unlock_irqrestore(&all_pvt_lock, flags);2253 2254#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)2255 if (pp->backlight_locker)2256 pmac_backlight_enable();2257#endif2258 2259 kfree(pp);2260 }2261 return 0;2262}2263 2264#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)2265static void pmac_suspend_disable_irqs(void)2266{2267 /* Call platform functions marked "on sleep" */2268 pmac_pfunc_i2c_suspend();2269 pmac_pfunc_base_suspend();2270}2271 2272static int powerbook_sleep(suspend_state_t state)2273{2274 int error = 0;2275 2276 /* Wait for completion of async requests */2277 while (!batt_req.complete)2278 pmu_poll();2279 2280 /* Giveup the lazy FPU & vec so we don't have to back them2281 * up from the low level code2282 */2283 enable_kernel_fp();2284 2285#ifdef CONFIG_ALTIVEC2286 if (cpu_has_feature(CPU_FTR_ALTIVEC))2287 enable_kernel_altivec();2288#endif /* CONFIG_ALTIVEC */2289 2290 switch (pmu_kind) {2291 case PMU_OHARE_BASED:2292 error = powerbook_sleep_3400();2293 break;2294 case PMU_HEATHROW_BASED:2295 case PMU_PADDINGTON_BASED:2296 error = powerbook_sleep_grackle();2297 break;2298 case PMU_KEYLARGO_BASED:2299 error = powerbook_sleep_Core99();2300 break;2301 default:2302 return -ENOSYS;2303 }2304 2305 if (error)2306 return error;2307 2308 mdelay(100);2309 2310 return 0;2311}2312 2313static void pmac_suspend_enable_irqs(void)2314{2315 /* Force a poll of ADB interrupts */2316 adb_int_pending = 1;2317 via_pmu_interrupt(0, NULL);2318 2319 mdelay(10);2320 2321 /* Call platform functions marked "on wake" */2322 pmac_pfunc_base_resume();2323 pmac_pfunc_i2c_resume();2324}2325 2326static int pmu_sleep_valid(suspend_state_t state)2327{2328 return state == PM_SUSPEND_MEM2329 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);2330}2331 2332static const struct platform_suspend_ops pmu_pm_ops = {2333 .enter = powerbook_sleep,2334 .valid = pmu_sleep_valid,2335};2336 2337static int __init register_pmu_pm_ops(void)2338{2339 if (pmu_kind == PMU_OHARE_BASED)2340 powerbook_sleep_init_3400();2341 ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;2342 ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;2343 suspend_set_ops(&pmu_pm_ops);2344 2345 return 0;2346}2347 2348device_initcall(register_pmu_pm_ops);2349#endif2350 2351static int pmu_ioctl(struct file *filp,2352 u_int cmd, u_long arg)2353{2354 __u32 __user *argp = (__u32 __user *)arg;2355 int error = -EINVAL;2356 2357 switch (cmd) {2358#ifdef CONFIG_PPC_PMAC2359 case PMU_IOC_SLEEP:2360 if (!capable(CAP_SYS_ADMIN))2361 return -EACCES;2362 return pm_suspend(PM_SUSPEND_MEM);2363 case PMU_IOC_CAN_SLEEP:2364 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)2365 return put_user(0, argp);2366 else2367 return put_user(1, argp);2368#endif2369 2370#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY2371 /* Compatibility ioctl's for backlight */2372 case PMU_IOC_GET_BACKLIGHT:2373 {2374 int brightness;2375 2376 brightness = pmac_backlight_get_legacy_brightness();2377 if (brightness < 0)2378 return brightness;2379 else2380 return put_user(brightness, argp);2381 2382 }2383 case PMU_IOC_SET_BACKLIGHT:2384 {2385 int brightness;2386 2387 error = get_user(brightness, argp);2388 if (error)2389 return error;2390 2391 return pmac_backlight_set_legacy_brightness(brightness);2392 }2393#ifdef CONFIG_INPUT_ADBHID2394 case PMU_IOC_GRAB_BACKLIGHT: {2395 struct pmu_private *pp = filp->private_data;2396 2397 if (pp->backlight_locker)2398 return 0;2399 2400 pp->backlight_locker = 1;2401 pmac_backlight_disable();2402 2403 return 0;2404 }2405#endif /* CONFIG_INPUT_ADBHID */2406#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */2407 2408 case PMU_IOC_GET_MODEL:2409 return put_user(pmu_kind, argp);2410 case PMU_IOC_HAS_ADB:2411 return put_user(pmu_has_adb, argp);2412 }2413 return error;2414}2415 2416static long pmu_unlocked_ioctl(struct file *filp,2417 u_int cmd, u_long arg)2418{2419 int ret;2420 2421 mutex_lock(&pmu_info_proc_mutex);2422 ret = pmu_ioctl(filp, cmd, arg);2423 mutex_unlock(&pmu_info_proc_mutex);2424 2425 return ret;2426}2427 2428#ifdef CONFIG_COMPAT2429#define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)2430#define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)2431#define PMU_IOC_GET_MODEL32 _IOR('B', 3, compat_size_t)2432#define PMU_IOC_HAS_ADB32 _IOR('B', 4, compat_size_t)2433#define PMU_IOC_CAN_SLEEP32 _IOR('B', 5, compat_size_t)2434#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)2435 2436static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)2437{2438 switch (cmd) {2439 case PMU_IOC_SLEEP:2440 break;2441 case PMU_IOC_GET_BACKLIGHT32:2442 cmd = PMU_IOC_GET_BACKLIGHT;2443 break;2444 case PMU_IOC_SET_BACKLIGHT32:2445 cmd = PMU_IOC_SET_BACKLIGHT;2446 break;2447 case PMU_IOC_GET_MODEL32:2448 cmd = PMU_IOC_GET_MODEL;2449 break;2450 case PMU_IOC_HAS_ADB32:2451 cmd = PMU_IOC_HAS_ADB;2452 break;2453 case PMU_IOC_CAN_SLEEP32:2454 cmd = PMU_IOC_CAN_SLEEP;2455 break;2456 case PMU_IOC_GRAB_BACKLIGHT32:2457 cmd = PMU_IOC_GRAB_BACKLIGHT;2458 break;2459 default:2460 return -ENOIOCTLCMD;2461 }2462 return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));2463}2464#endif2465 2466static const struct file_operations pmu_device_fops = {2467 .read = pmu_read,2468 .write = pmu_write,2469 .poll = pmu_fpoll,2470 .unlocked_ioctl = pmu_unlocked_ioctl,2471#ifdef CONFIG_COMPAT2472 .compat_ioctl = compat_pmu_ioctl,2473#endif2474 .open = pmu_open,2475 .release = pmu_release,2476 .llseek = noop_llseek,2477};2478 2479static struct miscdevice pmu_device = {2480 PMU_MINOR, "pmu", &pmu_device_fops2481};2482 2483static int pmu_device_init(void)2484{2485 if (pmu_state == uninitialized)2486 return 0;2487 if (misc_register(&pmu_device) < 0)2488 printk(KERN_ERR "via-pmu: cannot register misc device.\n");2489 return 0;2490}2491device_initcall(pmu_device_init);2492 2493 2494#ifdef DEBUG_SLEEP2495static inline void 2496polled_handshake(void)2497{2498 via2[B] &= ~TREQ; eieio();2499 while ((via2[B] & TACK) != 0)2500 ;2501 via2[B] |= TREQ; eieio();2502 while ((via2[B] & TACK) == 0)2503 ;2504}2505 2506static inline void 2507polled_send_byte(int x)2508{2509 via1[ACR] |= SR_OUT | SR_EXT; eieio();2510 via1[SR] = x; eieio();2511 polled_handshake();2512}2513 2514static inline int2515polled_recv_byte(void)2516{2517 int x;2518 2519 via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();2520 x = via1[SR]; eieio();2521 polled_handshake();2522 x = via1[SR]; eieio();2523 return x;2524}2525 2526int2527pmu_polled_request(struct adb_request *req)2528{2529 unsigned long flags;2530 int i, l, c;2531 2532 req->complete = 1;2533 c = req->data[0];2534 l = pmu_data_len[c][0];2535 if (l >= 0 && req->nbytes != l + 1)2536 return -EINVAL;2537 2538 local_irq_save(flags);2539 while (pmu_state != idle)2540 pmu_poll();2541 2542 while ((via2[B] & TACK) == 0)2543 ;2544 polled_send_byte(c);2545 if (l < 0) {2546 l = req->nbytes - 1;2547 polled_send_byte(l);2548 }2549 for (i = 1; i <= l; ++i)2550 polled_send_byte(req->data[i]);2551 2552 l = pmu_data_len[c][1];2553 if (l < 0)2554 l = polled_recv_byte();2555 for (i = 0; i < l; ++i)2556 req->reply[i + req->reply_len] = polled_recv_byte();2557 2558 if (req->done)2559 (*req->done)(req);2560 2561 local_irq_restore(flags);2562 return 0;2563}2564 2565/* N.B. This doesn't work on the 3400 */2566void pmu_blink(int n)2567{2568 struct adb_request req;2569 2570 memset(&req, 0, sizeof(req));2571 2572 for (; n > 0; --n) {2573 req.nbytes = 4;2574 req.done = NULL;2575 req.data[0] = 0xee;2576 req.data[1] = 4;2577 req.data[2] = 0;2578 req.data[3] = 1;2579 req.reply[0] = ADB_RET_OK;2580 req.reply_len = 1;2581 req.reply_expected = 0;2582 pmu_polled_request(&req);2583 mdelay(50);2584 req.nbytes = 4;2585 req.done = NULL;2586 req.data[0] = 0xee;2587 req.data[1] = 4;2588 req.data[2] = 0;2589 req.data[3] = 0;2590 req.reply[0] = ADB_RET_OK;2591 req.reply_len = 1;2592 req.reply_expected = 0;2593 pmu_polled_request(&req);2594 mdelay(50);2595 }2596 mdelay(50);2597}2598#endif /* DEBUG_SLEEP */2599 2600#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)2601int pmu_sys_suspended;2602 2603static int pmu_syscore_suspend(void)2604{2605 /* Suspend PMU event interrupts */2606 pmu_suspend();2607 pmu_sys_suspended = 1;2608 2609#ifdef CONFIG_PMAC_BACKLIGHT2610 /* Tell backlight code not to muck around with the chip anymore */2611 pmu_backlight_set_sleep(1);2612#endif2613 2614 return 0;2615}2616 2617static void pmu_syscore_resume(void)2618{2619 struct adb_request req;2620 2621 if (!pmu_sys_suspended)2622 return;2623 2624 /* Tell PMU we are ready */2625 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);2626 pmu_wait_complete(&req);2627 2628#ifdef CONFIG_PMAC_BACKLIGHT2629 /* Tell backlight code it can use the chip again */2630 pmu_backlight_set_sleep(0);2631#endif2632 /* Resume PMU event interrupts */2633 pmu_resume();2634 pmu_sys_suspended = 0;2635}2636 2637static struct syscore_ops pmu_syscore_ops = {2638 .suspend = pmu_syscore_suspend,2639 .resume = pmu_syscore_resume,2640};2641 2642static int pmu_syscore_register(void)2643{2644 register_syscore_ops(&pmu_syscore_ops);2645 2646 return 0;2647}2648subsys_initcall(pmu_syscore_register);2649#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */2650 2651EXPORT_SYMBOL(pmu_request);2652EXPORT_SYMBOL(pmu_queue_request);2653EXPORT_SYMBOL(pmu_poll);2654EXPORT_SYMBOL(pmu_poll_adb);2655EXPORT_SYMBOL(pmu_wait_complete);2656EXPORT_SYMBOL(pmu_suspend);2657EXPORT_SYMBOL(pmu_resume);2658EXPORT_SYMBOL(pmu_unlock);2659#if defined(CONFIG_PPC32)2660EXPORT_SYMBOL(pmu_enable_irled);2661EXPORT_SYMBOL(pmu_battery_count);2662EXPORT_SYMBOL(pmu_batteries);2663EXPORT_SYMBOL(pmu_power_flags);2664#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */2665 2666