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