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