err.no Git - linux-2.6/blob - drivers/macintosh/via-pmu.c

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