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                                printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 754                                        req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 755                                break;
 756                }
 757        }
 758
 759        if ((req->reply[1] & 0x01) && (amperage > 0))
 760                bat_flags |= PMU_BATT_CHARGING;
 761
 762        pmu_batteries[pmu_cur_battery].flags = bat_flags;
 763        pmu_batteries[pmu_cur_battery].charge = capa;
 764        pmu_batteries[pmu_cur_battery].max_charge = max;
 765        pmu_batteries[pmu_cur_battery].amperage = amperage;
 766        pmu_batteries[pmu_cur_battery].voltage = voltage;
 767        if (amperage) {
 768                if ((req->reply[1] & 0x01) && (amperage > 0))
 769                        pmu_batteries[pmu_cur_battery].time_remaining
 770                                = ((max-capa) * 3600) / amperage;
 771                else
 772                        pmu_batteries[pmu_cur_battery].time_remaining
 773                                = (capa * 3600) / (-amperage);
 774        } else
 775                pmu_batteries[pmu_cur_battery].time_remaining = 0;
 776
 777        pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 778
 779        clear_bit(0, &async_req_locks);
 780}
 781
 782static void
 783query_battery_state(void)
 784{
 785        if (test_and_set_bit(0, &async_req_locks))
 786                return;
 787        if (pmu_kind == PMU_OHARE_BASED)
 788                pmu_request(&batt_req, done_battery_state_ohare,
 789                        1, PMU_BATTERY_STATE);
 790        else
 791                pmu_request(&batt_req, done_battery_state_smart,
 792                        2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 793}
 794
 795static int pmu_info_proc_show(struct seq_file *m, void *v)
 796{
 797        seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 798        seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 799        seq_printf(m, "AC Power               : %d\n",
 800                ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 801        seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 802
 803        return 0;
 804}
 805
 806static int pmu_info_proc_open(struct inode *inode, struct file *file)
 807{
 808        return single_open(file, pmu_info_proc_show, NULL);
 809}
 810
 811static const struct file_operations pmu_info_proc_fops = {
 812        .owner          = THIS_MODULE,
 813        .open           = pmu_info_proc_open,
 814        .read           = seq_read,
 815        .llseek         = seq_lseek,
 816        .release        = single_release,
 817};
 818
 819static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 820{
 821        int i;
 822        static const char *irq_names[] = {
 823                "Total CB1 triggered events",
 824                "Total GPIO1 triggered events",
 825                "PC-Card eject button",
 826                "Sound/Brightness button",
 827                "ADB message",
 828                "Battery state change",
 829                "Environment interrupt",
 830                "Tick timer",
 831                "Ghost interrupt (zero len)",
 832                "Empty interrupt (empty mask)",
 833                "Max irqs in a row"
 834        };
 835
 836        for (i=0; i<11; i++) {
 837                seq_printf(m, " %2u: %10u (%s)\n",
 838                             i, pmu_irq_stats[i], irq_names[i]);
 839        }
 840        return 0;
 841}
 842
 843static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 844{
 845        return single_open(file, pmu_irqstats_proc_show, NULL);
 846}
 847
 848static const struct file_operations pmu_irqstats_proc_fops = {
 849        .owner          = THIS_MODULE,
 850        .open           = pmu_irqstats_proc_open,
 851        .read           = seq_read,
 852        .llseek         = seq_lseek,
 853        .release        = single_release,
 854};
 855
 856static int pmu_battery_proc_show(struct seq_file *m, void *v)
 857{
 858        long batnum = (long)m->private;
 859        
 860        seq_putc(m, '\n');
 861        seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 862        seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 863        seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 864        seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 865        seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 866        seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 867        return 0;
 868}
 869
 870static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 871{
 872        return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
 873}
 874
 875static const struct file_operations pmu_battery_proc_fops = {
 876        .owner          = THIS_MODULE,
 877        .open           = pmu_battery_proc_open,
 878        .read           = seq_read,
 879        .llseek         = seq_lseek,
 880        .release        = single_release,
 881};
 882
 883static int pmu_options_proc_show(struct seq_file *m, void *v)
 884{
 885#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 886        if (pmu_kind == PMU_KEYLARGO_BASED &&
 887            pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 888                seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 889#endif
 890        if (pmu_kind == PMU_KEYLARGO_BASED)
 891                seq_printf(m, "server_mode=%d\n", option_server_mode);
 892
 893        return 0;
 894}
 895
 896static int pmu_options_proc_open(struct inode *inode, struct file *file)
 897{
 898        return single_open(file, pmu_options_proc_show, NULL);
 899}
 900
 901static ssize_t pmu_options_proc_write(struct file *file,
 902                const char __user *buffer, size_t count, loff_t *pos)
 903{
 904        char tmp[33];
 905        char *label, *val;
 906        size_t fcount = count;
 907        
 908        if (!count)
 909                return -EINVAL;
 910        if (count > 32)
 911                count = 32;
 912        if (copy_from_user(tmp, buffer, count))
 913                return -EFAULT;
 914        tmp[count] = 0;
 915
 916        label = tmp;
 917        while(*label == ' ')
 918                label++;
 919        val = label;
 920        while(*val && (*val != '=')) {
 921                if (*val == ' ')
 922                        *val = 0;
 923                val++;
 924        }
 925        if ((*val) == 0)
 926                return -EINVAL;
 927        *(val++) = 0;
 928        while(*val == ' ')
 929                val++;
 930#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 931        if (pmu_kind == PMU_KEYLARGO_BASED &&
 932            pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 933                if (!strcmp(label, "lid_wakeup"))
 934                        option_lid_wakeup = ((*val) == '1');
 935#endif
 936        if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 937                int new_value;
 938                new_value = ((*val) == '1');
 939                if (new_value != option_server_mode)
 940                        pmu_set_server_mode(new_value);
 941        }
 942        return fcount;
 943}
 944
 945static const struct file_operations pmu_options_proc_fops = {
 946        .owner          = THIS_MODULE,
 947        .open           = pmu_options_proc_open,
 948        .read           = seq_read,
 949        .llseek         = seq_lseek,
 950        .release        = single_release,
 951        .write          = pmu_options_proc_write,
 952};
 953
 954#ifdef CONFIG_ADB
 955/* Send an ADB command */
 956static int pmu_send_request(struct adb_request *req, int sync)
 957{
 958        int i, ret;
 959
 960        if ((vias == NULL) || (!pmu_fully_inited)) {
 961                req->complete = 1;
 962                return -ENXIO;
 963        }
 964
 965        ret = -EINVAL;
 966
 967        switch (req->data[0]) {
 968        case PMU_PACKET:
 969                for (i = 0; i < req->nbytes - 1; ++i)
 970                        req->data[i] = req->data[i+1];
 971                --req->nbytes;
 972                if (pmu_data_len[req->data[0]][1] != 0) {
 973                        req->reply[0] = ADB_RET_OK;
 974                        req->reply_len = 1;
 975                } else
 976                        req->reply_len = 0;
 977                ret = pmu_queue_request(req);
 978                break;
 979        case CUDA_PACKET:
 980                switch (req->data[1]) {
 981                case CUDA_GET_TIME:
 982                        if (req->nbytes != 2)
 983                                break;
 984                        req->data[0] = PMU_READ_RTC;
 985                        req->nbytes = 1;
 986                        req->reply_len = 3;
 987                        req->reply[0] = CUDA_PACKET;
 988                        req->reply[1] = 0;
 989                        req->reply[2] = CUDA_GET_TIME;
 990                        ret = pmu_queue_request(req);
 991                        break;
 992                case CUDA_SET_TIME:
 993                        if (req->nbytes != 6)
 994                                break;
 995                        req->data[0] = PMU_SET_RTC;
 996                        req->nbytes = 5;
 997                        for (i = 1; i <= 4; ++i)
 998                                req->data[i] = req->data[i+1];
 999                        req->reply_len = 3;
1000                        req->reply[0] = CUDA_PACKET;
1001                        req->reply[1] = 0;
1002                        req->reply[2] = CUDA_SET_TIME;
1003                        ret = pmu_queue_request(req);
1004                        break;
1005                }
1006                break;
1007        case ADB_PACKET:
1008                if (!pmu_has_adb)
1009                        return -ENXIO;
1010                for (i = req->nbytes - 1; i > 1; --i)
1011                        req->data[i+2] = req->data[i];
1012                req->data[3] = req->nbytes - 2;
1013                req->data[2] = pmu_adb_flags;
1014                /*req->data[1] = req->data[1];*/
1015                req->data[0] = PMU_ADB_CMD;
1016                req->nbytes += 2;
1017                req->reply_expected = 1;
1018                req->reply_len = 0;
1019                ret = pmu_queue_request(req);
1020                break;
1021        }
1022        if (ret) {
1023                req->complete = 1;
1024                return ret;
1025        }
1026
1027        if (sync)
1028                while (!req->complete)
1029                        pmu_poll();
1030
1031        return 0;
1032}
1033
1034/* Enable/disable autopolling */
1035static int __pmu_adb_autopoll(int devs)
1036{
1037        struct adb_request req;
1038
1039        if (devs) {
1040                pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1041                            adb_dev_map >> 8, adb_dev_map);
1042                pmu_adb_flags = 2;
1043        } else {
1044                pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1045                pmu_adb_flags = 0;
1046        }
1047        while (!req.complete)
1048                pmu_poll();
1049        return 0;
1050}
1051
1052static int pmu_adb_autopoll(int devs)
1053{
1054        if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1055                return -ENXIO;
1056
1057        adb_dev_map = devs;
1058        return __pmu_adb_autopoll(devs);
1059}
1060
1061/* Reset the ADB bus */
1062static int pmu_adb_reset_bus(void)
1063{
1064        struct adb_request req;
1065        int save_autopoll = adb_dev_map;
1066
1067        if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1068                return -ENXIO;
1069
1070        /* anyone got a better idea?? */
1071        __pmu_adb_autopoll(0);
1072
1073        req.nbytes = 4;
1074        req.done = NULL;
1075        req.data[0] = PMU_ADB_CMD;
1076        req.data[1] = ADB_BUSRESET;
1077        req.data[2] = 0;
1078        req.data[3] = 0;
1079        req.data[4] = 0;
1080        req.reply_len = 0;
1081        req.reply_expected = 1;
1082        if (pmu_queue_request(&req) != 0) {
1083                printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1084                return -EIO;
1085        }
1086        pmu_wait_complete(&req);
1087
1088        if (save_autopoll != 0)
1089                __pmu_adb_autopoll(save_autopoll);
1090
1091        return 0;
1092}
1093#endif /* CONFIG_ADB */
1094
1095/* Construct and send a pmu request */
1096int
1097pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1098            int nbytes, ...)
1099{
1100        va_list list;
1101        int i;
1102
1103        if (vias == NULL)
1104                return -ENXIO;
1105
1106        if (nbytes < 0 || nbytes > 32) {
1107                printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1108                req->complete = 1;
1109                return -EINVAL;
1110        }
1111        req->nbytes = nbytes;
1112        req->done = done;
1113        va_start(list, nbytes);
1114        for (i = 0; i < nbytes; ++i)
1115                req->data[i] = va_arg(list, int);
1116        va_end(list);
1117        req->reply_len = 0;
1118        req->reply_expected = 0;
1119        return pmu_queue_request(req);
1120}
1121
1122int
1123pmu_queue_request(struct adb_request *req)
1124{
1125        unsigned long flags;
1126        int nsend;
1127
1128        if (via == NULL) {
1129                req->complete = 1;
1130                return -ENXIO;
1131        }
1132        if (req->nbytes <= 0) {
1133                req->complete = 1;
1134                return 0;
1135        }
1136        nsend = pmu_data_len[req->data[0]][0];
1137        if (nsend >= 0 && req->nbytes != nsend + 1) {
1138                req->complete = 1;
1139                return -EINVAL;
1140        }
1141
1142        req->next = NULL;
1143        req->sent = 0;
1144        req->complete = 0;
1145
1146        spin_lock_irqsave(&pmu_lock, flags);
1147        if (current_req != 0) {
1148                last_req->next = req;
1149                last_req = req;
1150        } else {
1151                current_req = req;
1152                last_req = req;
1153                if (pmu_state == idle)
1154                        pmu_start();
1155        }
1156        spin_unlock_irqrestore(&pmu_lock, flags);
1157
1158        return 0;
1159}
1160
1161static inline void
1162wait_for_ack(void)
1163{
1164        /* Sightly increased the delay, I had one occurrence of the message
1165         * reported
1166         */
1167        int timeout = 4000;
1168        while ((in_8(&via[B]) & TACK) == 0) {
1169                if (--timeout < 0) {
1170                        printk(KERN_ERR "PMU not responding (!ack)\n");
1171                        return;
1172                }
1173                udelay(10);
1174        }
1175}
1176
1177/* New PMU seems to be very sensitive to those timings, so we make sure
1178 * PCI is flushed immediately */
1179static inline void
1180send_byte(int x)
1181{
1182        volatile unsigned char __iomem *v = via;
1183
1184        out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1185        out_8(&v[SR], x);
1186        out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1187        (void)in_8(&v[B]);
1188}
1189
1190static inline void
1191recv_byte(void)
1192{
1193        volatile unsigned char __iomem *v = via;
1194
1195        out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1196        in_8(&v[SR]);           /* resets SR */
1197        out_8(&v[B], in_8(&v[B]) & ~TREQ);
1198        (void)in_8(&v[B]);
1199}
1200
1201static inline void
1202pmu_done(struct adb_request *req)
1203{
1204        void (*done)(struct adb_request *) = req->done;
1205        mb();
1206        req->complete = 1;
1207        /* Here, we assume that if the request has a done member, the
1208         * struct request will survive to setting req->complete to 1
1209         */
1210        if (done)
1211                (*done)(req);
1212}
1213
1214static void
1215pmu_start(void)
1216{
1217        struct adb_request *req;
1218
1219        /* assert pmu_state == idle */
1220        /* get the packet to send */
1221        req = current_req;
1222        if (req == 0 || pmu_state != idle
1223            || (/*req->reply_expected && */req_awaiting_reply))
1224                return;
1225
1226        pmu_state = sending;
1227        data_index = 1;
1228        data_len = pmu_data_len[req->data[0]][0];
1229
1230        /* Sounds safer to make sure ACK is high before writing. This helped
1231         * kill a problem with ADB and some iBooks
1232         */
1233        wait_for_ack();
1234        /* set the shift register to shift out and send a byte */
1235        send_byte(req->data[0]);
1236}
1237
1238void
1239pmu_poll(void)
1240{
1241        if (!via)
1242                return;
1243        if (disable_poll)
1244                return;
1245        via_pmu_interrupt(0, NULL);
1246}
1247
1248void
1249pmu_poll_adb(void)
1250{
1251        if (!via)
1252                return;
1253        if (disable_poll)
1254                return;
1255        /* Kicks ADB read when PMU is suspended */
1256        adb_int_pending = 1;
1257        do {
1258                via_pmu_interrupt(0, NULL);
1259        } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1260                || req_awaiting_reply));
1261}
1262
1263void
1264pmu_wait_complete(struct adb_request *req)
1265{
1266        if (!via)
1267                return;
1268        while((pmu_state != idle && pmu_state != locked) || !req->complete)
1269                via_pmu_interrupt(0, NULL);
1270}
1271
1272/* This function loops until the PMU is idle and prevents it from
1273 * anwsering to ADB interrupts. pmu_request can still be called.
1274 * This is done to avoid spurrious shutdowns when we know we'll have
1275 * interrupts switched off for a long time
1276 */
1277void
1278pmu_suspend(void)
1279{
1280        unsigned long flags;
1281
1282        if (!via)
1283                return;
1284        
1285        spin_lock_irqsave(&pmu_lock, flags);
1286        pmu_suspended++;
1287        if (pmu_suspended > 1) {
1288                spin_unlock_irqrestore(&pmu_lock, flags);
1289                return;
1290        }
1291
1292        do {
1293                spin_unlock_irqrestore(&pmu_lock, flags);
1294                if (req_awaiting_reply)
1295                        adb_int_pending = 1;
1296                via_pmu_interrupt(0, NULL);
1297                spin_lock_irqsave(&pmu_lock, flags);
1298                if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1299                        if (gpio_irq >= 0)
1300                                disable_irq_nosync(gpio_irq);
1301                        out_8(&via[IER], CB1_INT | IER_CLR);
1302                        spin_unlock_irqrestore(&pmu_lock, flags);
1303                        break;
1304                }
1305        } while (1);
1306}
1307
1308void
1309pmu_resume(void)
1310{
1311        unsigned long flags;
1312
1313        if (!via || (pmu_suspended < 1))
1314                return;
1315
1316        spin_lock_irqsave(&pmu_lock, flags);
1317        pmu_suspended--;
1318        if (pmu_suspended > 0) {
1319                spin_unlock_irqrestore(&pmu_lock, flags);
1320                return;
1321        }
1322        adb_int_pending = 1;
1323        if (gpio_irq >= 0)
1324                enable_irq(gpio_irq);
1325        out_8(&via[IER], CB1_INT | IER_SET);
1326        spin_unlock_irqrestore(&pmu_lock, flags);
1327        pmu_poll();
1328}
1329
1330/* Interrupt data could be the result data from an ADB cmd */
1331static void
1332pmu_handle_data(unsigned char *data, int len)
1333{
1334        unsigned char ints, pirq;
1335        int i = 0;
1336
1337        asleep = 0;
1338        if (drop_interrupts || len < 1) {
1339                adb_int_pending = 0;
1340                pmu_irq_stats[8]++;
1341                return;
1342        }
1343
1344        /* Get PMU interrupt mask */
1345        ints = data[0];
1346
1347        /* Record zero interrupts for stats */
1348        if (ints == 0)
1349                pmu_irq_stats[9]++;
1350
1351        /* Hack to deal with ADB autopoll flag */
1352        if (ints & PMU_INT_ADB)
1353                ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1354
1355next:
1356
1357        if (ints == 0) {
1358                if (i > pmu_irq_stats[10])
1359                        pmu_irq_stats[10] = i;
1360                return;
1361        }
1362
1363        for (pirq = 0; pirq < 8; pirq++)
1364                if (ints & (1 << pirq))
1365                        break;
1366        pmu_irq_stats[pirq]++;
1367        i++;
1368        ints &= ~(1 << pirq);
1369
1370        /* Note: for some reason, we get an interrupt with len=1,
1371         * data[0]==0 after each normal ADB interrupt, at least
1372         * on the Pismo. Still investigating...  --BenH
1373         */
1374        if ((1 << pirq) & PMU_INT_ADB) {
1375                if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1376                        struct adb_request *req = req_awaiting_reply;
1377                        if (req == 0) {
1378                                printk(KERN_ERR "PMU: extra ADB reply\n");
1379                                return;
1380                        }
1381                        req_awaiting_reply = NULL;
1382                        if (len <= 2)
1383                                req->reply_len = 0;
1384                        else {
1385                                memcpy(req->reply, data + 1, len - 1);
1386                                req->reply_len = len - 1;
1387                        }
1388                        pmu_done(req);
1389                } else {
1390                        if (len == 4 && data[1] == 0x2c) {
1391                                extern int xmon_wants_key, xmon_adb_keycode;
1392                                if (xmon_wants_key) {
1393                                        xmon_adb_keycode = data[2];
1394                                        return;
1395                                }
1396                        }
1397#ifdef CONFIG_ADB
1398                        /*
1399                         * XXX On the [23]400 the PMU gives us an up
1400                         * event for keycodes 0x74 or 0x75 when the PC
1401                         * card eject buttons are released, so we
1402                         * ignore those events.
1403                         */
1404                        if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1405                              && data[1] == 0x2c && data[3] == 0xff
1406                              && (data[2] & ~1) == 0xf4))
1407                                adb_input(data+1, len-1, 1);
1408#endif /* CONFIG_ADB */         
1409                }
1410        }
1411        /* Sound/brightness button pressed */
1412        else if ((1 << pirq) & PMU_INT_SNDBRT) {
1413#ifdef CONFIG_PMAC_BACKLIGHT
1414                if (len == 3)
1415                        pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1416#endif
1417        }
1418        /* Tick interrupt */
1419        else if ((1 << pirq) & PMU_INT_TICK) {
1420                /* Environement or tick interrupt, query batteries */
1421                if (pmu_battery_count) {
1422                        if ((--query_batt_timer) == 0) {
1423                                query_battery_state();
1424                                query_batt_timer = BATTERY_POLLING_COUNT;
1425                        }
1426                }
1427        }
1428        else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1429                if (pmu_battery_count)
1430                        query_battery_state();
1431                pmu_pass_intr(data, len);
1432                /* len == 6 is probably a bad check. But how do I
1433                 * know what PMU versions send what events here? */
1434                if (len == 6) {
1435                        via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1436                        via_pmu_event(PMU_EVT_LID, data[1]&1);
1437                }
1438        } else {
1439               pmu_pass_intr(data, len);
1440        }
1441        goto next;
1442}
1443
1444static struct adb_request*
1445pmu_sr_intr(void)
1446{
1447        struct adb_request *req;
1448        int bite = 0;
1449
1450        if (via[B] & TREQ) {
1451                printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1452                out_8(&via[IFR], SR_INT);
1453                return NULL;
1454        }
1455        /* The ack may not yet be low when we get the interrupt */
1456        while ((in_8(&via[B]) & TACK) != 0)
1457                        ;
1458
1459        /* if reading grab the byte, and reset the interrupt */
1460        if (pmu_state == reading || pmu_state == reading_intr)
1461                bite = in_8(&via[SR]);
1462
1463        /* reset TREQ and wait for TACK to go high */
1464        out_8(&via[B], in_8(&via[B]) | TREQ);
1465        wait_for_ack();
1466
1467        switch (pmu_state) {
1468        case sending:
1469                req = current_req;
1470                if (data_len < 0) {
1471                        data_len = req->nbytes - 1;
1472                        send_byte(data_len);
1473                        break;
1474                }
1475                if (data_index <= data_len) {
1476                        send_byte(req->data[data_index++]);
1477                        break;
1478                }
1479                req->sent = 1;
1480                data_len = pmu_data_len[req->data[0]][1];
1481                if (data_len == 0) {
1482                        pmu_state = idle;
1483                        current_req = req->next;
1484                        if (req->reply_expected)
1485                                req_awaiting_reply = req;
1486                        else
1487                                return req;
1488                } else {
1489                        pmu_state = reading;
1490                        data_index = 0;
1491                        reply_ptr = req->reply + req->reply_len;
1492                        recv_byte();
1493                }
1494                break;
1495
1496        case intack:
1497                data_index = 0;
1498                data_len = -1;
1499                pmu_state = reading_intr;
1500                reply_ptr = interrupt_data[int_data_last];
1501                recv_byte();
1502                if (gpio_irq >= 0 && !gpio_irq_enabled) {
1503                        enable_irq(gpio_irq);
1504                        gpio_irq_enabled = 1;
1505                }
1506                break;
1507
1508        case reading:
1509        case reading_intr:
1510                if (data_len == -1) {
1511                        data_len = bite;
1512                        if (bite > 32)
1513                                printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1514                } else if (data_index < 32) {
1515                        reply_ptr[data_index++] = bite;
1516                }
1517                if (data_index < data_len) {
1518                        recv_byte();
1519                        break;
1520                }
1521
1522                if (pmu_state == reading_intr) {
1523                        pmu_state = idle;
1524                        int_data_state[int_data_last] = int_data_ready;
1525                        interrupt_data_len[int_data_last] = data_len;
1526                } else {
1527                        req = current_req;
1528                        /* 
1529                         * For PMU sleep and freq change requests, we lock the
1530                         * PMU until it's explicitly unlocked. This avoids any
1531                         * spurrious event polling getting in
1532                         */
1533                        current_req = req->next;
1534                        req->reply_len += data_index;
1535                        if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1536                                pmu_state = locked;
1537                        else
1538                                pmu_state = idle;
1539                        return req;
1540                }
1541                break;
1542
1543        default:
1544                printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1545                       pmu_state);
1546        }
1547        return NULL;
1548}
1549
1550static irqreturn_t
1551via_pmu_interrupt(int irq, void *arg)
1552{
1553        unsigned long flags;
1554        int intr;
1555        int nloop = 0;
1556        int int_data = -1;
1557        struct adb_request *req = NULL;
1558        int handled = 0;
1559
1560        /* This is a bit brutal, we can probably do better */
1561        spin_lock_irqsave(&pmu_lock, flags);
1562        ++disable_poll;
1563        
1564        for (;;) {
1565                intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1566                if (intr == 0)
1567                        break;
1568                handled = 1;
1569                if (++nloop > 1000) {
1570                        printk(KERN_DEBUG "PMU: stuck in intr loop, "
1571                               "intr=%x, ier=%x pmu_state=%d\n",
1572                               intr, in_8(&via[IER]), pmu_state);
1573                        break;
1574                }
1575                out_8(&via[IFR], intr);
1576                if (intr & CB1_INT) {
1577                        adb_int_pending = 1;
1578                        pmu_irq_stats[0]++;
1579                }
1580                if (intr & SR_INT) {
1581                        req = pmu_sr_intr();
1582                        if (req)
1583                                break;
1584                }
1585        }
1586
1587recheck:
1588        if (pmu_state == idle) {
1589                if (adb_int_pending) {
1590                        if (int_data_state[0] == int_data_empty)
1591                                int_data_last = 0;
1592                        else if (int_data_state[1] == int_data_empty)
1593                                int_data_last = 1;
1594                        else
1595                                goto no_free_slot;
1596                        pmu_state = intack;
1597                        int_data_state[int_data_last] = int_data_fill;
1598                        /* Sounds safer to make sure ACK is high before writing.
1599                         * This helped kill a problem with ADB and some iBooks
1600                         */
1601                        wait_for_ack();
1602                        send_byte(PMU_INT_ACK);
1603                        adb_int_pending = 0;
1604                } else if (current_req)
1605                        pmu_start();
1606        }
1607no_free_slot:                   
1608        /* Mark the oldest buffer for flushing */
1609        if (int_data_state[!int_data_last] == int_data_ready) {
1610                int_data_state[!int_data_last] = int_data_flush;
1611                int_data = !int_data_last;
1612        } else if (int_data_state[int_data_last] == int_data_ready) {
1613                int_data_state[int_data_last] = int_data_flush;
1614                int_data = int_data_last;
1615        }
1616        --disable_poll;
1617        spin_unlock_irqrestore(&pmu_lock, flags);
1618
1619        /* Deal with completed PMU requests outside of the lock */
1620        if (req) {
1621                pmu_done(req);
1622                req = NULL;
1623        }
1624                
1625        /* Deal with interrupt datas outside of the lock */
1626        if (int_data >= 0) {
1627                pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1628                spin_lock_irqsave(&pmu_lock, flags);
1629                ++disable_poll;
1630                int_data_state[int_data] = int_data_empty;
1631                int_data = -1;
1632                goto recheck;
1633        }
1634
1635        return IRQ_RETVAL(handled);
1636}
1637
1638void
1639pmu_unlock(void)
1640{
1641        unsigned long flags;
1642
1643        spin_lock_irqsave(&pmu_lock, flags);
1644        if (pmu_state == locked)
1645                pmu_state = idle;
1646        adb_int_pending = 1;
1647        spin_unlock_irqrestore(&pmu_lock, flags);
1648}
1649
1650
1651static irqreturn_t
1652gpio1_interrupt(int irq, void *arg)
1653{
1654        unsigned long flags;
1655
1656        if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1657                spin_lock_irqsave(&pmu_lock, flags);
1658                if (gpio_irq_enabled > 0) {
1659                        disable_irq_nosync(gpio_irq);
1660                        gpio_irq_enabled = 0;
1661                }
1662                pmu_irq_stats[1]++;
1663                adb_int_pending = 1;
1664                spin_unlock_irqrestore(&pmu_lock, flags);
1665                via_pmu_interrupt(0, NULL);
1666                return IRQ_HANDLED;
1667        }
1668        return IRQ_NONE;
1669}
1670
1671void
1672pmu_enable_irled(int on)
1673{
1674        struct adb_request req;
1675
1676        if (vias == NULL)
1677                return ;
1678        if (pmu_kind == PMU_KEYLARGO_BASED)
1679                return ;
1680
1681        pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1682            (on ? PMU_POW_ON : PMU_POW_OFF));
1683        pmu_wait_complete(&req);
1684}
1685
1686void
1687pmu_restart(void)
1688{
1689        struct adb_request req;
1690
1691        if (via == NULL)
1692                return;
1693
1694        local_irq_disable();
1695
1696        drop_interrupts = 1;
1697        
1698        if (pmu_kind != PMU_KEYLARGO_BASED) {
1699                pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700                                                PMU_INT_TICK );
1701                while(!req.complete)
1702                        pmu_poll();
1703        }
1704
1705        pmu_request(&req, NULL, 1, PMU_RESET);
1706        pmu_wait_complete(&req);
1707        for (;;)
1708                ;
1709}
1710
1711void
1712pmu_shutdown(void)
1713{
1714        struct adb_request req;
1715
1716        if (via == NULL)
1717                return;
1718
1719        local_irq_disable();
1720
1721        drop_interrupts = 1;
1722
1723        if (pmu_kind != PMU_KEYLARGO_BASED) {
1724                pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1725                                                PMU_INT_TICK );
1726                pmu_wait_complete(&req);
1727        } else {
1728                /* Disable server mode on shutdown or we'll just
1729                 * wake up again
1730                 */
1731                pmu_set_server_mode(0);
1732        }
1733
1734        pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1735                    'M', 'A', 'T', 'T');
1736        pmu_wait_complete(&req);
1737        for (;;)
1738                ;
1739}
1740
1741int
1742pmu_present(void)
1743{
1744        return via != 0;
1745}
1746
1747#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1748/*
1749 * Put the powerbook to sleep.
1750 */
1751 
1752static u32 save_via[8];
1753
1754static void
1755save_via_state(void)
1756{
1757        save_via[0] = in_8(&via[ANH]);
1758        save_via[1] = in_8(&via[DIRA]);
1759        save_via[2] = in_8(&via[B]);
1760        save_via[3] = in_8(&via[DIRB]);
1761        save_via[4] = in_8(&via[PCR]);
1762        save_via[5] = in_8(&via[ACR]);
1763        save_via[6] = in_8(&via[T1CL]);
1764        save_via[7] = in_8(&via[T1CH]);
1765}
1766static void
1767restore_via_state(void)
1768{
1769        out_8(&via[ANH], save_via[0]);
1770        out_8(&via[DIRA], save_via[1]);
1771        out_8(&via[B], save_via[2]);
1772        out_8(&via[DIRB], save_via[3]);
1773        out_8(&via[PCR], save_via[4]);
1774        out_8(&via[ACR], save_via[5]);
1775        out_8(&via[T1CL], save_via[6]);
1776        out_8(&via[T1CH], save_via[7]);
1777        out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1778        out_8(&via[IFR], 0x7f);                         /* clear IFR */
1779        out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1780}
1781
1782#define GRACKLE_PM      (1<<7)
1783#define GRACKLE_DOZE    (1<<5)
1784#define GRACKLE_NAP     (1<<4)
1785#define GRACKLE_SLEEP   (1<<3)
1786
1787static int powerbook_sleep_grackle(void)
1788{
1789        unsigned long save_l2cr;
1790        unsigned short pmcr1;
1791        struct adb_request req;
1792        struct pci_dev *grackle;
1793
1794        grackle = pci_get_bus_and_slot(0, 0);
1795        if (!grackle)
1796                return -ENODEV;
1797
1798        /* Turn off various things. Darwin does some retry tests here... */
1799        pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1800        pmu_wait_complete(&req);
1801        pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1802                PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1803        pmu_wait_complete(&req);
1804
1805        /* For 750, save backside cache setting and disable it */
1806        save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1807
1808        if (!__fake_sleep) {
1809                /* Ask the PMU to put us to sleep */
1810                pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1811                pmu_wait_complete(&req);
1812        }
1813
1814        /* The VIA is supposed not to be restored correctly*/
1815        save_via_state();
1816        /* We shut down some HW */
1817        pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1818
1819        pci_read_config_word(grackle, 0x70, &pmcr1);
1820        /* Apparently, MacOS uses NAP mode for Grackle ??? */
1821        pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP); 
1822        pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1823        pci_write_config_word(grackle, 0x70, pmcr1);
1824
1825        /* Call low-level ASM sleep handler */
1826        if (__fake_sleep)
1827                mdelay(5000);
1828        else
1829                low_sleep_handler();
1830
1831        /* We're awake again, stop grackle PM */
1832        pci_read_config_word(grackle, 0x70, &pmcr1);
1833        pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP); 
1834        pci_write_config_word(grackle, 0x70, pmcr1);
1835
1836        pci_dev_put(grackle);
1837
1838        /* Make sure the PMU is idle */
1839        pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1840        restore_via_state();
1841        
1842        /* Restore L2 cache */
1843        if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1844                _set_L2CR(save_l2cr);
1845        
1846        /* Restore userland MMU context */
1847        switch_mmu_context(NULL, current->active_mm);
1848
1849        /* Power things up */
1850        pmu_unlock();
1851        pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1852        pmu_wait_complete(&req);
1853        pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1854                        PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1855        pmu_wait_complete(&req);
1856        pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1857                        PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1858        pmu_wait_complete(&req);
1859
1860        return 0;
1861}
1862
1863static int
1864powerbook_sleep_Core99(void)
1865{
1866        unsigned long save_l2cr;
1867        unsigned long save_l3cr;
1868        struct adb_request req;
1869        
1870        if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1871                printk(KERN_ERR "Sleep mode not supported on this machine\n");
1872                return -ENOSYS;
1873        }
1874
1875        if (num_online_cpus() > 1 || cpu_is_offline(0))
1876                return -EAGAIN;
1877
1878        /* Stop environment and ADB interrupts */
1879        pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1880        pmu_wait_complete(&req);
1881
1882        /* Tell PMU what events will wake us up */
1883        pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1884                0xff, 0xff);
1885        pmu_wait_complete(&req);
1886        pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1887                0, PMU_PWR_WAKEUP_KEY |
1888                (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1889        pmu_wait_complete(&req);
1890
1891        /* Save the state of the L2 and L3 caches */
1892        save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1893        save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1894
1895        if (!__fake_sleep) {
1896                /* Ask the PMU to put us to sleep */
1897                pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1898                pmu_wait_complete(&req);
1899        }
1900
1901        /* The VIA is supposed not to be restored correctly*/
1902        save_via_state();
1903
1904        /* Shut down various ASICs. There's a chance that we can no longer
1905         * talk to the PMU after this, so I moved it to _after_ sending the
1906         * sleep command to it. Still need to be checked.
1907         */
1908        pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1909
1910        /* Call low-level ASM sleep handler */
1911        if (__fake_sleep)
1912                mdelay(5000);
1913        else
1914                low_sleep_handler();
1915
1916        /* Restore Apple core ASICs state */
1917        pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1918
1919        /* Restore VIA */
1920        restore_via_state();
1921
1922        /* tweak LPJ before cpufreq is there */
1923        loops_per_jiffy *= 2;
1924
1925        /* Restore video */
1926        pmac_call_early_video_resume();
1927
1928        /* Restore L2 cache */
1929        if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1930                _set_L2CR(save_l2cr);
1931        /* Restore L3 cache */
1932        if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1933                _set_L3CR(save_l3cr);
1934        
1935        /* Restore userland MMU context */
1936        switch_mmu_context(NULL, current->active_mm);
1937
1938        /* Tell PMU we are ready */
1939        pmu_unlock();
1940        pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1941        pmu_wait_complete(&req);
1942        pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1943        pmu_wait_complete(&req);
1944
1945        /* Restore LPJ, cpufreq will adjust the cpu frequency */
1946        loops_per_jiffy /= 2;
1947
1948        return 0;
1949}
1950
1951#define PB3400_MEM_CTRL         0xf8000000
1952#define PB3400_MEM_CTRL_SLEEP   0x70
1953
1954static void __iomem *pb3400_mem_ctrl;
1955
1956static void powerbook_sleep_init_3400(void)
1957{
1958        /* map in the memory controller registers */
1959        pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1960        if (pb3400_mem_ctrl == NULL)
1961                printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1962}
1963
1964static int powerbook_sleep_3400(void)
1965{
1966        int i, x;
1967        unsigned int hid0;
1968        unsigned long msr;
1969        struct adb_request sleep_req;
1970        unsigned int __iomem *mem_ctrl_sleep;
1971
1972        if (pb3400_mem_ctrl == NULL)
1973                return -ENOMEM;
1974        mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1975
1976        /* Set the memory controller to keep the memory refreshed
1977           while we're asleep */
1978        for (i = 0x403f; i >= 0x4000; --i) {
1979                out_be32(mem_ctrl_sleep, i);
1980                do {
1981                        x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1982                } while (x == 0);
1983                if (x >= 0x100)
1984                        break;
1985        }
1986
1987        /* Ask the PMU to put us to sleep */
1988        pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1989        pmu_wait_complete(&sleep_req);
1990        pmu_unlock();
1991
1992        pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1993
1994        asleep = 1;
1995
1996        /* Put the CPU into sleep mode */
1997        hid0 = mfspr(SPRN_HID0);
1998        hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1999        mtspr(SPRN_HID0, hid0);
2000        local_irq_enable();
2001        msr = mfmsr() | MSR_POW;
2002        while (asleep) {
2003                mb();
2004                mtmsr(msr);
2005                isync();
2006        }
2007        local_irq_disable();
2008
2009        /* OK, we're awake again, start restoring things */
2010        out_be32(mem_ctrl_sleep, 0x3f);
2011        pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2012
2013        return 0;
2014}
2015
2016#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2017
2018/*
2019 * Support for /dev/pmu device
2020 */
2021#define RB_SIZE         0x10
2022struct pmu_private {
2023        struct list_head list;
2024        int     rb_get;
2025        int     rb_put;
2026        struct rb_entry {
2027                unsigned short len;
2028                unsigned char data[16];
2029        }       rb_buf[RB_SIZE];
2030        wait_queue_head_t wait;
2031        spinlock_t lock;
2032#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2033        int     backlight_locker;
2034#endif
2035};
2036
2037static LIST_HEAD(all_pmu_pvt);
2038static DEFINE_SPINLOCK(all_pvt_lock);
2039
2040static void
2041pmu_pass_intr(unsigned char *data, int len)
2042{
2043        struct pmu_private *pp;
2044        struct list_head *list;
2045        int i;
2046        unsigned long flags;
2047
2048        if (len > sizeof(pp->rb_buf[0].data))
2049                len = sizeof(pp->rb_buf[0].data);
2050        spin_lock_irqsave(&all_pvt_lock, flags);
2051        for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2052                pp = list_entry(list, struct pmu_private, list);
2053                spin_lock(&pp->lock);
2054                i = pp->rb_put + 1;
2055                if (i >= RB_SIZE)
2056                        i = 0;
2057                if (i != pp->rb_get) {
2058                        struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2059                        rp->len = len;
2060                        memcpy(rp->data, data, len);
2061                        pp->rb_put = i;
2062                        wake_up_interruptible(&pp->wait);
2063                }
2064                spin_unlock(&pp->lock);
2065        }
2066        spin_unlock_irqrestore(&all_pvt_lock, flags);
2067}
2068
2069static int
2070pmu_open(struct inode *inode, struct file *file)
2071{
2072        struct pmu_private *pp;
2073        unsigned long flags;
2074
2075        pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2076        if (pp == 0)
2077                return -ENOMEM;
2078        pp->rb_get = pp->rb_put = 0;
2079        spin_lock_init(&pp->lock);
2080        init_waitqueue_head(&pp->wait);
2081        mutex_lock(&pmu_info_proc_mutex);
2082        spin_lock_irqsave(&all_pvt_lock, flags);
2083#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2084        pp->backlight_locker = 0;
2085#endif
2086        list_add(&pp->list, &all_pmu_pvt);
2087        spin_unlock_irqrestore(&all_pvt_lock, flags);
2088        file->private_data = pp;
2089        mutex_unlock(&pmu_info_proc_mutex);
2090        return 0;
2091}
2092
2093static ssize_t 
2094pmu_read(struct file *file, char __user *buf,
2095                        size_t count, loff_t *ppos)
2096{
2097        struct pmu_private *pp = file->private_data;
2098        DECLARE_WAITQUEUE(wait, current);
2099        unsigned long flags;
2100        int ret = 0;
2101
2102        if (count < 1 || pp == 0)
2103                return -EINVAL;
2104        if (!access_ok(VERIFY_WRITE, buf, count))
2105                return -EFAULT;
2106
2107        spin_lock_irqsave(&pp->lock, flags);
2108        add_wait_queue(&pp->wait, &wait);
2109        current->state = TASK_INTERRUPTIBLE;
2110
2111        for (;;) {
2112                ret = -EAGAIN;
2113                if (pp->rb_get != pp->rb_put) {
2114                        int i = pp->rb_get;
2115                        struct rb_entry *rp = &pp->rb_buf[i];
2116                        ret = rp->len;
2117                        spin_unlock_irqrestore(&pp->lock, flags);
2118                        if (ret > count)
2119                                ret = count;
2120                        if (ret > 0 && copy_to_user(buf, rp->data, ret))
2121                                ret = -EFAULT;
2122                        if (++i >= RB_SIZE)
2123                                i = 0;
2124                        spin_lock_irqsave(&pp->lock, flags);
2125                        pp->rb_get = i;
2126                }
2127                if (ret >= 0)
2128                        break;
2129                if (file->f_flags & O_NONBLOCK)
2130                        break;
2131                ret = -ERESTARTSYS;
2132                if (signal_pending(current))
2133                        break;
2134                spin_unlock_irqrestore(&pp->lock, flags);
2135                schedule();
2136                spin_lock_irqsave(&pp->lock, flags);
2137        }
2138        current->state = TASK_RUNNING;
2139        remove_wait_queue(&pp->wait, &wait);
2140        spin_unlock_irqrestore(&pp->lock, flags);
2141        
2142        return ret;
2143}
2144
2145static ssize_t
2146pmu_write(struct file *file, const char __user *buf,
2147                         size_t count, loff_t *ppos)
2148{
2149        return 0;
2150}
2151
2152static unsigned int
2153pmu_fpoll(struct file *filp, poll_table *wait)
2154{
2155        struct pmu_private *pp = filp->private_data;
2156        unsigned int mask = 0;
2157        unsigned long flags;
2158        
2159        if (pp == 0)
2160                return 0;
2161        poll_wait(filp, &pp->wait, wait);
2162        spin_lock_irqsave(&pp->lock, flags);
2163        if (pp->rb_get != pp->rb_put)
2164                mask |= POLLIN;
2165        spin_unlock_irqrestore(&pp->lock, flags);
2166        return mask;
2167}
2168
2169static int
2170pmu_release(struct inode *inode, struct file *file)
2171{
2172        struct pmu_private *pp = file->private_data;
2173        unsigned long flags;
2174
2175        if (pp != 0) {
2176                file->private_data = NULL;
2177                spin_lock_irqsave(&all_pvt_lock, flags);
2178                list_del(&pp->list);
2179                spin_unlock_irqrestore(&all_pvt_lock, flags);
2180
2181#if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2182                if (pp->backlight_locker)
2183                        pmac_backlight_enable();
2184#endif
2185
2186                kfree(pp);
2187        }
2188        return 0;
2189}
2190
2191#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2192static void pmac_suspend_disable_irqs(void)
2193{
2194        /* Call platform functions marked "on sleep" */
2195        pmac_pfunc_i2c_suspend();
2196        pmac_pfunc_base_suspend();
2197}
2198
2199static int powerbook_sleep(suspend_state_t state)
2200{
2201        int error = 0;
2202
2203        /* Wait for completion of async requests */
2204        while (!batt_req.complete)
2205                pmu_poll();
2206
2207        /* Giveup the lazy FPU & vec so we don't have to back them
2208         * up from the low level code
2209         */
2210        enable_kernel_fp();
2211
2212#ifdef CONFIG_ALTIVEC
2213        if (cpu_has_feature(CPU_FTR_ALTIVEC))
2214                enable_kernel_altivec();
2215#endif /* CONFIG_ALTIVEC */
2216
2217        switch (pmu_kind) {
2218        case PMU_OHARE_BASED:
2219                error = powerbook_sleep_3400();
2220                break;
2221        case PMU_HEATHROW_BASED:
2222        case PMU_PADDINGTON_BASED:
2223                error = powerbook_sleep_grackle();
2224                break;
2225        case PMU_KEYLARGO_BASED:
2226                error = powerbook_sleep_Core99();
2227                break;
2228        default:
2229                return -ENOSYS;
2230        }
2231
2232        if (error)
2233                return error;
2234
2235        mdelay(100);
2236
2237        return 0;
2238}
2239
2240static void pmac_suspend_enable_irqs(void)
2241{
2242        /* Force a poll of ADB interrupts */
2243        adb_int_pending = 1;
2244        via_pmu_interrupt(0, NULL);
2245
2246        mdelay(10);
2247
2248        /* Call platform functions marked "on wake" */
2249        pmac_pfunc_base_resume();
2250        pmac_pfunc_i2c_resume();
2251}
2252
2253static int pmu_sleep_valid(suspend_state_t state)
2254{
2255        return state == PM_SUSPEND_MEM
2256                && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2257}
2258
2259static const struct platform_suspend_ops pmu_pm_ops = {
2260        .enter = powerbook_sleep,
2261        .valid = pmu_sleep_valid,
2262};
2263
2264static int register_pmu_pm_ops(void)
2265{
2266        if (pmu_kind == PMU_OHARE_BASED)
2267                powerbook_sleep_init_3400();
2268        ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2269        ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2270        suspend_set_ops(&pmu_pm_ops);
2271
2272        return 0;
2273}
2274
2275device_initcall(register_pmu_pm_ops);
2276#endif
2277
2278static int pmu_ioctl(struct file *filp,
2279                     u_int cmd, u_long arg)
2280{
2281        __u32 __user *argp = (__u32 __user *)arg;
2282        int error = -EINVAL;
2283
2284        switch (cmd) {
2285        case PMU_IOC_SLEEP:
2286                if (!capable(CAP_SYS_ADMIN))
2287                        return -EACCES;
2288                return pm_suspend(PM_SUSPEND_MEM);
2289        case PMU_IOC_CAN_SLEEP:
2290                if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2291                        return put_user(0, argp);
2292                else
2293                        return put_user(1, argp);
2294
2295#ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2296        /* Compatibility ioctl's for backlight */
2297        case PMU_IOC_GET_BACKLIGHT:
2298        {
2299                int brightness;
2300
2301                brightness = pmac_backlight_get_legacy_brightness();
2302                if (brightness < 0)
2303                        return brightness;
2304                else
2305                        return put_user(brightness, argp);
2306
2307        }
2308        case PMU_IOC_SET_BACKLIGHT:
2309        {
2310                int brightness;
2311
2312                error = get_user(brightness, argp);
2313                if (error)
2314                        return error;
2315
2316                return pmac_backlight_set_legacy_brightness(brightness);
2317        }
2318#ifdef CONFIG_INPUT_ADBHID
2319        case PMU_IOC_GRAB_BACKLIGHT: {
2320                struct pmu_private *pp = filp->private_data;
2321
2322                if (pp->backlight_locker)
2323                        return 0;
2324
2325                pp->backlight_locker = 1;
2326                pmac_backlight_disable();
2327
2328                return 0;
2329        }
2330#endif /* CONFIG_INPUT_ADBHID */
2331#endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2332
2333        case PMU_IOC_GET_MODEL:
2334                return put_user(pmu_kind, argp);
2335        case PMU_IOC_HAS_ADB:
2336                return put_user(pmu_has_adb, argp);
2337        }
2338        return error;
2339}
2340
2341static long pmu_unlocked_ioctl(struct file *filp,
2342                               u_int cmd, u_long arg)
2343{
2344        int ret;
2345
2346        mutex_lock(&pmu_info_proc_mutex);
2347        ret = pmu_ioctl(filp, cmd, arg);
2348        mutex_unlock(&pmu_info_proc_mutex);
2349
2350        return ret;
2351}
2352
2353#ifdef CONFIG_COMPAT
2354#define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2355#define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2356#define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2357#define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2358#define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2359#define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2360
2361static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2362{
2363        switch (cmd) {
2364        case PMU_IOC_SLEEP:
2365                break;
2366        case PMU_IOC_GET_BACKLIGHT32:
2367                cmd = PMU_IOC_GET_BACKLIGHT;
2368                break;
2369        case PMU_IOC_SET_BACKLIGHT32:
2370                cmd = PMU_IOC_SET_BACKLIGHT;
2371                break;
2372        case PMU_IOC_GET_MODEL32:
2373                cmd = PMU_IOC_GET_MODEL;
2374                break;
2375        case PMU_IOC_HAS_ADB32:
2376                cmd = PMU_IOC_HAS_ADB;
2377                break;
2378        case PMU_IOC_CAN_SLEEP32:
2379                cmd = PMU_IOC_CAN_SLEEP;
2380                break;
2381        case PMU_IOC_GRAB_BACKLIGHT32:
2382                cmd = PMU_IOC_GRAB_BACKLIGHT;
2383                break;
2384        default:
2385                return -ENOIOCTLCMD;
2386        }
2387        return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2388}
2389#endif
2390
2391static const struct file_operations pmu_device_fops = {
2392        .read           = pmu_read,
2393        .write          = pmu_write,
2394        .poll           = pmu_fpoll,
2395        .unlocked_ioctl = pmu_unlocked_ioctl,
2396#ifdef CONFIG_COMPAT
2397        .compat_ioctl   = compat_pmu_ioctl,
2398#endif
2399        .open           = pmu_open,
2400        .release        = pmu_release,
2401        .llseek         = noop_llseek,
2402};
2403
2404static struct miscdevice pmu_device = {
2405        PMU_MINOR, "pmu", &pmu_device_fops
2406};
2407
2408static int pmu_device_init(void)
2409{
2410        if (!via)
2411                return 0;
2412        if (misc_register(&pmu_device) < 0)
2413                printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2414        return 0;
2415}
2416device_initcall(pmu_device_init);
2417
2418
2419#ifdef DEBUG_SLEEP
2420static inline void 
2421polled_handshake(volatile unsigned char __iomem *via)
2422{
2423        via[B] &= ~TREQ; eieio();
2424        while ((via[B] & TACK) != 0)
2425                ;
2426        via[B] |= TREQ; eieio();
2427        while ((via[B] & TACK) == 0)
2428                ;
2429}
2430
2431static inline void 
2432polled_send_byte(volatile unsigned char __iomem *via, int x)
2433{
2434        via[ACR] |= SR_OUT | SR_EXT; eieio();
2435        via[SR] = x; eieio();
2436        polled_handshake(via);
2437}
2438
2439static inline int
2440polled_recv_byte(volatile unsigned char __iomem *via)
2441{
2442        int x;
2443
2444        via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2445        x = via[SR]; eieio();
2446        polled_handshake(via);
2447        x = via[SR]; eieio();
2448        return x;
2449}
2450
2451int
2452pmu_polled_request(struct adb_request *req)
2453{
2454        unsigned long flags;
2455        int i, l, c;
2456        volatile unsigned char __iomem *v = via;
2457
2458        req->complete = 1;
2459        c = req->data[0];
2460        l = pmu_data_len[c][0];
2461        if (l >= 0 && req->nbytes != l + 1)
2462                return -EINVAL;
2463
2464        local_irq_save(flags);
2465        while (pmu_state != idle)
2466                pmu_poll();
2467
2468        while ((via[B] & TACK) == 0)
2469                ;
2470        polled_send_byte(v, c);
2471        if (l < 0) {
2472                l = req->nbytes - 1;
2473                polled_send_byte(v, l);
2474        }
2475        for (i = 1; i <= l; ++i)
2476                polled_send_byte(v, req->data[i]);
2477
2478        l = pmu_data_len[c][1];
2479        if (l < 0)
2480                l = polled_recv_byte(v);
2481        for (i = 0; i < l; ++i)
2482                req->reply[i + req->reply_len] = polled_recv_byte(v);
2483
2484        if (req->done)
2485                (*req->done)(req);
2486
2487        local_irq_restore(flags);
2488        return 0;
2489}
2490
2491/* N.B. This doesn't work on the 3400 */
2492void pmu_blink(int n)
2493{
2494        struct adb_request req;
2495
2496        memset(&req, 0, sizeof(req));
2497
2498        for (; n > 0; --n) {
2499                req.nbytes = 4;
2500                req.done = NULL;
2501                req.data[0] = 0xee;
2502                req.data[1] = 4;
2503                req.data[2] = 0;
2504                req.data[3] = 1;
2505                req.reply[0] = ADB_RET_OK;
2506                req.reply_len = 1;
2507                req.reply_expected = 0;
2508                pmu_polled_request(&req);
2509                mdelay(50);
2510                req.nbytes = 4;
2511                req.done = NULL;
2512                req.data[0] = 0xee;
2513                req.data[1] = 4;
2514                req.data[2] = 0;
2515                req.data[3] = 0;
2516                req.reply[0] = ADB_RET_OK;
2517                req.reply_len = 1;
2518                req.reply_expected = 0;
2519                pmu_polled_request(&req);
2520                mdelay(50);
2521        }
2522        mdelay(50);
2523}
2524#endif /* DEBUG_SLEEP */
2525
2526#if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2527int pmu_sys_suspended;
2528
2529static int pmu_syscore_suspend(void)
2530{
2531        /* Suspend PMU event interrupts */
2532        pmu_suspend();
2533        pmu_sys_suspended = 1;
2534
2535#ifdef CONFIG_PMAC_BACKLIGHT
2536        /* Tell backlight code not to muck around with the chip anymore */
2537        pmu_backlight_set_sleep(1);
2538#endif
2539
2540        return 0;
2541}
2542
2543static void pmu_syscore_resume(void)
2544{
2545        struct adb_request req;
2546
2547        if (!pmu_sys_suspended)
2548                return;
2549
2550        /* Tell PMU we are ready */
2551        pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2552        pmu_wait_complete(&req);
2553
2554#ifdef CONFIG_PMAC_BACKLIGHT
2555        /* Tell backlight code it can use the chip again */
2556        pmu_backlight_set_sleep(0);
2557#endif
2558        /* Resume PMU event interrupts */
2559        pmu_resume();
2560        pmu_sys_suspended = 0;
2561}
2562
2563static struct syscore_ops pmu_syscore_ops = {
2564        .suspend = pmu_syscore_suspend,
2565        .resume = pmu_syscore_resume,
2566};
2567
2568static int pmu_syscore_register(void)
2569{
2570        register_syscore_ops(&pmu_syscore_ops);
2571
2572        return 0;
2573}
2574subsys_initcall(pmu_syscore_register);
2575#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2576
2577EXPORT_SYMBOL(pmu_request);
2578EXPORT_SYMBOL(pmu_queue_request);
2579EXPORT_SYMBOL(pmu_poll);
2580EXPORT_SYMBOL(pmu_poll_adb);
2581EXPORT_SYMBOL(pmu_wait_complete);
2582EXPORT_SYMBOL(pmu_suspend);
2583EXPORT_SYMBOL(pmu_resume);
2584EXPORT_SYMBOL(pmu_unlock);
2585#if defined(CONFIG_PPC32)
2586EXPORT_SYMBOL(pmu_enable_irled);
2587EXPORT_SYMBOL(pmu_battery_count);
2588EXPORT_SYMBOL(pmu_batteries);
2589EXPORT_SYMBOL(pmu_power_flags);
2590#endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2591
2592
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