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  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Save/Restore PCI space properly
  20  *
  21  */
  22 #include <stdarg.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/adb.h>
  34 #include <linux/pmu.h>
  35 #include <linux/cuda.h>
  36 #include <linux/module.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/pm.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/init.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/device.h>
  43 #include <linux/sysdev.h>
  44 #include <linux/freezer.h>
  45 #include <linux/syscalls.h>
  46 #include <linux/suspend.h>
  47 #include <linux/cpu.h>
  48 #include <asm/prom.h>
  49 #include <asm/machdep.h>
  50 #include <asm/io.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/system.h>
  53 #include <asm/sections.h>
  54 #include <asm/irq.h>
  55 #include <asm/pmac_feature.h>
  56 #include <asm/pmac_pfunc.h>
  57 #include <asm/pmac_low_i2c.h>
  58 #include <asm/uaccess.h>
  59 #include <asm/mmu_context.h>
  60 #include <asm/cputable.h>
  61 #include <asm/time.h>
  62 #include <asm/backlight.h>
  63
  64 #include "via-pmu-event.h"
  65
  66 /* Some compile options */
  67 #define DEBUG_SLEEP
  68
  69 /* Misc minor number allocated for /dev/pmu */
  70 #define PMU_MINOR               154
  71
  72 /* How many iterations between battery polls */
  73 #define BATTERY_POLLING_COUNT   2
  74
  75 static volatile unsigned char __iomem *via;
  76
  77 /* VIA registers - spaced 0x200 bytes apart */
  78 #define RS              0x200           /* skip between registers */
  79 #define B               0               /* B-side data */
  80 #define A               RS              /* A-side data */
  81 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  82 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  83 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  84 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  85 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  86 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  87 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  88 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  89 #define SR              (10*RS)         /* Shift register */
  90 #define ACR             (11*RS)         /* Auxiliary control register */
  91 #define PCR             (12*RS)         /* Peripheral control register */
  92 #define IFR             (13*RS)         /* Interrupt flag register */
  93 #define IER             (14*RS)         /* Interrupt enable register */
  94 #define ANH             (15*RS)         /* A-side data, no handshake */
  95
  96 /* Bits in B data register: both active low */
  97 #define TACK            0x08            /* Transfer acknowledge (input) */
  98 #define TREQ            0x10            /* Transfer request (output) */
  99
 100 /* Bits in ACR */
 101 #define SR_CTRL         0x1c            /* Shift register control bits */
 102 #define SR_EXT          0x0c            /* Shift on external clock */
 103 #define SR_OUT          0x10            /* Shift out if 1 */
 104
 105 /* Bits in IFR and IER */
 106 #define IER_SET         0x80            /* set bits in IER */
 107 #define IER_CLR         0               /* clear bits in IER */
 108 #define SR_INT          0x04            /* Shift register full/empty */
 109 #define CB2_INT         0x08
 110 #define CB1_INT         0x10            /* transition on CB1 input */
 111
 112 static volatile enum pmu_state {
 113         idle,
 114         sending,
 115         intack,
 116         reading,
 117         reading_intr,
 118         locked,
 119 } pmu_state;
 120
 121 static volatile enum int_data_state {
 122         int_data_empty,
 123         int_data_fill,
 124         int_data_ready,
 125         int_data_flush
 126 } int_data_state[2] = { int_data_empty, int_data_empty };
 127
 128 static struct adb_request *current_req;
 129 static struct adb_request *last_req;
 130 static struct adb_request *req_awaiting_reply;
 131 static unsigned char interrupt_data[2][32];
 132 static int interrupt_data_len[2];
 133 static int int_data_last;
 134 static unsigned char *reply_ptr;
 135 static int data_index;
 136 static int data_len;
 137 static volatile int adb_int_pending;
 138 static volatile int disable_poll;
 139 static struct device_node *vias;
 140 static int pmu_kind = PMU_UNKNOWN;
 141 static int pmu_fully_inited;
 142 static int pmu_has_adb;
 143 static struct device_node *gpio_node;
 144 static unsigned char __iomem *gpio_reg;
 145 static int gpio_irq = NO_IRQ;
 146 static int gpio_irq_enabled = -1;
 147 static volatile int pmu_suspended;
 148 static spinlock_t pmu_lock;
 149 static u8 pmu_intr_mask;
 150 static int pmu_version;
 151 static int drop_interrupts;
 152 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 153 static int option_lid_wakeup = 1;
 154 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
 155 #if (defined(CONFIG_PM_SLEEP)&&defined(CONFIG_PPC32))||defined(CONFIG_PMAC_BACKLIGHT_LEGACY)
 156 static int sleep_in_progress;
 157 #endif
 158 static unsigned long async_req_locks;
 159 static unsigned int pmu_irq_stats[11];
 160
 161 static struct proc_dir_entry *proc_pmu_root;
 162 static struct proc_dir_entry *proc_pmu_info;
 163 static struct proc_dir_entry *proc_pmu_irqstats;
 164 static struct proc_dir_entry *proc_pmu_options;
 165 static int option_server_mode;
 166
 167 int pmu_battery_count;
 168 int pmu_cur_battery;
 169 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 171 static int query_batt_timer = BATTERY_POLLING_COUNT;
 172 static struct adb_request batt_req;
 173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 174
 175 int __fake_sleep;
 176 int asleep;
 177
 178 #ifdef CONFIG_ADB
 179 static int adb_dev_map;
 180 static int pmu_adb_flags;
 181
 182 static int pmu_probe(void);
 183 static int pmu_init(void);
 184 static int pmu_send_request(struct adb_request *req, int sync);
 185 static int pmu_adb_autopoll(int devs);
 186 static int pmu_adb_reset_bus(void);
 187 #endif /* CONFIG_ADB */
 188
 189 static int init_pmu(void);
 190 static void pmu_start(void);
 191 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 192 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 193 static int proc_get_info(char *page, char **start, off_t off,
 194                           int count, int *eof, void *data);
 195 static int proc_get_irqstats(char *page, char **start, off_t off,
 196                           int count, int *eof, void *data);
 197 static void pmu_pass_intr(unsigned char *data, int len);
 198 static int proc_get_batt(char *page, char **start, off_t off,
 199                         int count, int *eof, void *data);
 200 static int proc_read_options(char *page, char **start, off_t off,
 201                         int count, int *eof, void *data);
 202 static int proc_write_options(struct file *file, const char __user *buffer,
 203                         unsigned long count, void *data);
 204
 205 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 206 static void powerbook_sleep_init_3400(void);
 207 #else
 208 #define powerbook_sleep_init_3400()     do { } while (0)
 209 #endif
 210
 211 #ifdef CONFIG_ADB
 212 struct adb_driver via_pmu_driver = {
 213         "PMU",
 214         pmu_probe,
 215         pmu_init,
 216         pmu_send_request,
 217         pmu_adb_autopoll,
 218         pmu_poll_adb,
 219         pmu_adb_reset_bus
 220 };
 221 #endif /* CONFIG_ADB */
 222
 223 extern void low_sleep_handler(void);
 224 extern void enable_kernel_altivec(void);
 225 extern void enable_kernel_fp(void);
 226
 227 #ifdef DEBUG_SLEEP
 228 int pmu_polled_request(struct adb_request *req);
 229 int pmu_wink(struct adb_request *req);
 230 #endif
 231
 232 /*
 233  * This table indicates for each PMU opcode:
 234  * - the number of data bytes to be sent with the command, or -1
 235  *   if a length byte should be sent,
 236  * - the number of response bytes which the PMU will return, or
 237  *   -1 if it will send a length byte.
 238  */
 239 static const s8 pmu_data_len[256][2] = {
 240 /*         0       1       2       3       4       5       6       7  */
 241 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 243 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 245 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 247 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 249 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 250 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 251 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 252 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 253 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 255 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 257 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 259 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 262 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 263 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 267 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 268 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 269 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 270 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 271 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 272 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 273 };
 274
 275 static char *pbook_type[] = {
 276         "Unknown PowerBook",
 277         "PowerBook 2400/3400/3500(G3)",
 278         "PowerBook G3 Series",
 279         "1999 PowerBook G3",
 280         "Core99"
 281 };
 282
 283 int __init find_via_pmu(void)
 284 {
 285         u64 taddr;
 286         const u32 *reg;
 287
 288         if (via != 0)
 289                 return 1;
 290         vias = of_find_node_by_name(NULL, "via-pmu");
 291         if (vias == NULL)
 292                 return 0;
 293
 294         reg = of_get_property(vias, "reg", NULL);
 295         if (reg == NULL) {
 296                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 297                 goto fail;
 298         }
 299         taddr = of_translate_address(vias, reg);
 300         if (taddr == OF_BAD_ADDR) {
 301                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 302                 goto fail;
 303         }
 304
 305         spin_lock_init(&pmu_lock);
 306
 307         pmu_has_adb = 1;
 308
 309         pmu_intr_mask = PMU_INT_PCEJECT |
 310                         PMU_INT_SNDBRT |
 311                         PMU_INT_ADB |
 312                         PMU_INT_TICK;
 313
 314         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 315             || of_device_is_compatible(vias->parent, "ohare")))
 316                 pmu_kind = PMU_OHARE_BASED;
 317         else if (of_device_is_compatible(vias->parent, "paddington"))
 318                 pmu_kind = PMU_PADDINGTON_BASED;
 319         else if (of_device_is_compatible(vias->parent, "heathrow"))
 320                 pmu_kind = PMU_HEATHROW_BASED;
 321         else if (of_device_is_compatible(vias->parent, "Keylargo")
 322                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 323                 struct device_node *gpiop;
 324                 struct device_node *adbp;
 325                 u64 gaddr = OF_BAD_ADDR;
 326
 327                 pmu_kind = PMU_KEYLARGO_BASED;
 328                 adbp = of_find_node_by_type(NULL, "adb");
 329                 pmu_has_adb = (adbp != NULL);
 330                 of_node_put(adbp);
 331                 pmu_intr_mask = PMU_INT_PCEJECT |
 332                                 PMU_INT_SNDBRT |
 333                                 PMU_INT_ADB |
 334                                 PMU_INT_TICK |
 335                                 PMU_INT_ENVIRONMENT;
 336
 337                 gpiop = of_find_node_by_name(NULL, "gpio");
 338                 if (gpiop) {
 339                         reg = of_get_property(gpiop, "reg", NULL);
 340                         if (reg)
 341                                 gaddr = of_translate_address(gpiop, reg);
 342                         if (gaddr != OF_BAD_ADDR)
 343                                 gpio_reg = ioremap(gaddr, 0x10);
 344                 }
 345                 if (gpio_reg == NULL) {
 346                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 347                         goto fail_gpio;
 348                 }
 349         } else
 350                 pmu_kind = PMU_UNKNOWN;
 351
 352         via = ioremap(taddr, 0x2000);
 353         if (via == NULL) {
 354                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 355                 goto fail;
 356         }
 357
 358         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 359         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 360
 361         pmu_state = idle;
 362
 363         if (!init_pmu()) {
 364                 via = NULL;
 365                 return 0;
 366         }
 367
 368         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 369                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 370
 371         sys_ctrler = SYS_CTRLER_PMU;
 372
 373         return 1;
 374  fail:
 375         of_node_put(vias);
 376         iounmap(gpio_reg);
 377         gpio_reg = NULL;
 378  fail_gpio:
 379         vias = NULL;
 380         return 0;
 381 }
 382
 383 #ifdef CONFIG_ADB
 384 static int pmu_probe(void)
 385 {
 386         return vias == NULL? -ENODEV: 0;
 387 }
 388
 389 static int __init pmu_init(void)
 390 {
 391         if (vias == NULL)
 392                 return -ENODEV;
 393         return 0;
 394 }
 395 #endif /* CONFIG_ADB */
 396
 397 /*
 398  * We can't wait until pmu_init gets called, that happens too late.
 399  * It happens after IDE and SCSI initialization, which can take a few
 400  * seconds, and by that time the PMU could have given up on us and
 401  * turned us off.
 402  * Thus this is called with arch_initcall rather than device_initcall.
 403  */
 404 static int __init via_pmu_start(void)
 405 {
 406         unsigned int irq;
 407
 408         if (vias == NULL)
 409                 return -ENODEV;
 410
 411         batt_req.complete = 1;
 412
 413         irq = irq_of_parse_and_map(vias, 0);
 414         if (irq == NO_IRQ) {
 415                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 416                 return -ENODEV;
 417         }
 418         if (request_irq(irq, via_pmu_interrupt, 0, "VIA-PMU", (void *)0)) {
 419                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 420                 return -ENODEV;
 421         }
 422
 423         if (pmu_kind == PMU_KEYLARGO_BASED) {
 424                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 425                 if (gpio_node == NULL)
 426                         gpio_node = of_find_node_by_name(NULL,
 427                                                          "pmu-interrupt");
 428                 if (gpio_node)
 429                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 430
 431                 if (gpio_irq != NO_IRQ) {
 432                         if (request_irq(gpio_irq, gpio1_interrupt, 0,
 433                                         "GPIO1 ADB", (void *)0))
 434                                 printk(KERN_ERR "pmu: can't get irq %d"
 435                                        " (GPIO1)\n", gpio_irq);
 436                         else
 437                                 gpio_irq_enabled = 1;
 438                 }
 439         }
 440
 441         /* Enable interrupts */
 442         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 443
 444         pmu_fully_inited = 1;
 445
 446         /* Make sure PMU settle down before continuing. This is _very_ important
 447          * since the IDE probe may shut interrupts down for quite a bit of time. If
 448          * a PMU communication is pending while this happens, the PMU may timeout
 449          * Not that on Core99 machines, the PMU keeps sending us environement
 450          * messages, we should find a way to either fix IDE or make it call
 451          * pmu_suspend() before masking interrupts. This can also happens while
 452          * scolling with some fbdevs.
 453          */
 454         do {
 455                 pmu_poll();
 456         } while (pmu_state != idle);
 457
 458         /* Do allocations and ioremaps that will be needed for sleep */
 459         if (pmu_kind == PMU_OHARE_BASED)
 460                 powerbook_sleep_init_3400();
 461
 462         return 0;
 463 }
 464
 465 arch_initcall(via_pmu_start);
 466
 467 /*
 468  * This has to be done after pci_init, which is a subsys_initcall.
 469  */
 470 static int __init via_pmu_dev_init(void)
 471 {
 472         if (vias == NULL)
 473                 return -ENODEV;
 474
 475 #ifdef CONFIG_PMAC_BACKLIGHT
 476         /* Initialize backlight */
 477         pmu_backlight_init();
 478 #endif
 479
 480 #ifdef CONFIG_PPC32
 481         if (machine_is_compatible("AAPL,3400/2400") ||
 482                 machine_is_compatible("AAPL,3500")) {
 483                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 484                         NULL, PMAC_MB_INFO_MODEL, 0);
 485                 pmu_battery_count = 1;
 486                 if (mb == PMAC_TYPE_COMET)
 487                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 488                 else
 489                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 490         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 491                 machine_is_compatible("PowerBook1,1")) {
 492                 pmu_battery_count = 2;
 493                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 494                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 495         } else {
 496                 struct device_node* prim =
 497                         of_find_node_by_name(NULL, "power-mgt");
 498                 const u32 *prim_info = NULL;
 499                 if (prim)
 500                         prim_info = of_get_property(prim, "prim-info", NULL);
 501                 if (prim_info) {
 502                         /* Other stuffs here yet unknown */
 503                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 504                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 505                         if (pmu_battery_count > 1)
 506                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 507                 }
 508                 of_node_put(prim);
 509         }
 510 #endif /* CONFIG_PPC32 */
 511
 512         /* Create /proc/pmu */
 513         proc_pmu_root = proc_mkdir("pmu", NULL);
 514         if (proc_pmu_root) {
 515                 long i;
 516
 517                 for (i=0; i<pmu_battery_count; i++) {
 518                         char title[16];
 519                         sprintf(title, "battery_%ld", i);
 520                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 521                                                 proc_get_batt, (void *)i);
 522                 }
 523
 524                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 525                                         proc_get_info, NULL);
 526                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 527                                         proc_get_irqstats, NULL);
 528                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 529                 if (proc_pmu_options) {
 530                         proc_pmu_options->read_proc = proc_read_options;
 531                         proc_pmu_options->write_proc = proc_write_options;
 532                 }
 533         }
 534         return 0;
 535 }
 536
 537 device_initcall(via_pmu_dev_init);
 538
 539 static int
 540 init_pmu(void)
 541 {
 542         int timeout;
 543         struct adb_request req;
 544
 545         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 546         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 547
 548         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 549         timeout =  100000;
 550         while (!req.complete) {
 551                 if (--timeout < 0) {
 552                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 553                         return 0;
 554                 }
 555                 udelay(10);
 556                 pmu_poll();
 557         }
 558
 559         /* ack all pending interrupts */
 560         timeout = 100000;
 561         interrupt_data[0][0] = 1;
 562         while (interrupt_data[0][0] || pmu_state != idle) {
 563                 if (--timeout < 0) {
 564                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 565                         return 0;
 566                 }
 567                 if (pmu_state == idle)
 568                         adb_int_pending = 1;
 569                 via_pmu_interrupt(0, NULL);
 570                 udelay(10);
 571         }
 572
 573         /* Tell PMU we are ready.  */
 574         if (pmu_kind == PMU_KEYLARGO_BASED) {
 575                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 576                 while (!req.complete)
 577                         pmu_poll();
 578         }
 579
 580         /* Read PMU version */
 581         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 582         pmu_wait_complete(&req);
 583         if (req.reply_len > 0)
 584                 pmu_version = req.reply[0];
 585
 586         /* Read server mode setting */
 587         if (pmu_kind == PMU_KEYLARGO_BASED) {
 588                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 589                             PMU_PWR_GET_POWERUP_EVENTS);
 590                 pmu_wait_complete(&req);
 591                 if (req.reply_len == 2) {
 592                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 593                                 option_server_mode = 1;
 594                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 595                                option_server_mode ? "enabled" : "disabled");
 596                 }
 597         }
 598         return 1;
 599 }
 600
 601 int
 602 pmu_get_model(void)
 603 {
 604         return pmu_kind;
 605 }
 606
 607 static void pmu_set_server_mode(int server_mode)
 608 {
 609         struct adb_request req;
 610
 611         if (pmu_kind != PMU_KEYLARGO_BASED)
 612                 return;
 613
 614         option_server_mode = server_mode;
 615         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 616         pmu_wait_complete(&req);
 617         if (req.reply_len < 2)
 618                 return;
 619         if (server_mode)
 620                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 621                             PMU_PWR_SET_POWERUP_EVENTS,
 622                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 623         else
 624                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 625                             PMU_PWR_CLR_POWERUP_EVENTS,
 626                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 627         pmu_wait_complete(&req);
 628 }
 629
 630 /* This new version of the code for 2400/3400/3500 powerbooks
 631  * is inspired from the implementation in gkrellm-pmu
 632  */
 633 static void
 634 done_battery_state_ohare(struct adb_request* req)
 635 {
 636         /* format:
 637          *  [0]    :  flags
 638          *    0x01 :  AC indicator
 639          *    0x02 :  charging
 640          *    0x04 :  battery exist
 641          *    0x08 :
 642          *    0x10 :
 643          *    0x20 :  full charged
 644          *    0x40 :  pcharge reset
 645          *    0x80 :  battery exist
 646          *
 647          *  [1][2] :  battery voltage
 648          *  [3]    :  CPU temperature
 649          *  [4]    :  battery temperature
 650          *  [5]    :  current
 651          *  [6][7] :  pcharge
 652          *              --tkoba
 653          */
 654         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 655         long pcharge, charge, vb, vmax, lmax;
 656         long vmax_charging, vmax_charged;
 657         long amperage, voltage, time, max;
 658         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 659                         NULL, PMAC_MB_INFO_MODEL, 0);
 660
 661         if (req->reply[0] & 0x01)
 662                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 663         else
 664                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 665
 666         if (mb == PMAC_TYPE_COMET) {
 667                 vmax_charged = 189;
 668                 vmax_charging = 213;
 669                 lmax = 6500;
 670         } else {
 671                 vmax_charged = 330;
 672                 vmax_charging = 330;
 673                 lmax = 6500;
 674         }
 675         vmax = vmax_charged;
 676
 677         /* If battery installed */
 678         if (req->reply[0] & 0x04) {
 679                 bat_flags |= PMU_BATT_PRESENT;
 680                 if (req->reply[0] & 0x02)
 681                         bat_flags |= PMU_BATT_CHARGING;
 682                 vb = (req->reply[1] << 8) | req->reply[2];
 683                 voltage = (vb * 265 + 72665) / 10;
 684                 amperage = req->reply[5];
 685                 if ((req->reply[0] & 0x01) == 0) {
 686                         if (amperage > 200)
 687                                 vb += ((amperage - 200) * 15)/100;
 688                 } else if (req->reply[0] & 0x02) {
 689                         vb = (vb * 97) / 100;
 690                         vmax = vmax_charging;
 691                 }
 692                 charge = (100 * vb) / vmax;
 693                 if (req->reply[0] & 0x40) {
 694                         pcharge = (req->reply[6] << 8) + req->reply[7];
 695                         if (pcharge > lmax)
 696                                 pcharge = lmax;
 697                         pcharge *= 100;
 698                         pcharge = 100 - pcharge / lmax;
 699                         if (pcharge < charge)
 700                                 charge = pcharge;
 701                 }
 702                 if (amperage > 0)
 703                         time = (charge * 16440) / amperage;
 704                 else
 705                         time = 0;
 706                 max = 100;
 707                 amperage = -amperage;
 708         } else
 709                 charge = max = amperage = voltage = time = 0;
 710
 711         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 712         pmu_batteries[pmu_cur_battery].charge = charge;
 713         pmu_batteries[pmu_cur_battery].max_charge = max;
 714         pmu_batteries[pmu_cur_battery].amperage = amperage;
 715         pmu_batteries[pmu_cur_battery].voltage = voltage;
 716         pmu_batteries[pmu_cur_battery].time_remaining = time;
 717
 718         clear_bit(0, &async_req_locks);
 719 }
 720
 721 static void
 722 done_battery_state_smart(struct adb_request* req)
 723 {
 724         /* format:
 725          *  [0] : format of this structure (known: 3,4,5)
 726          *  [1] : flags
 727          *
 728          *  format 3 & 4:
 729          *
 730          *  [2] : charge
 731          *  [3] : max charge
 732          *  [4] : current
 733          *  [5] : voltage
 734          *
 735          *  format 5:
 736          *
 737          *  [2][3] : charge
 738          *  [4][5] : max charge
 739          *  [6][7] : current
 740          *  [8][9] : voltage
 741          */
 742
 743         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 744         int amperage;
 745         unsigned int capa, max, voltage;
 746
 747         if (req->reply[1] & 0x01)
 748                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 749         else
 750                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 751
 752
 753         capa = max = amperage = voltage = 0;
 754
 755         if (req->reply[1] & 0x04) {
 756                 bat_flags |= PMU_BATT_PRESENT;
 757                 switch(req->reply[0]) {
 758                         case 3:
 759                         case 4: capa = req->reply[2];
 760                                 max = req->reply[3];
 761                                 amperage = *((signed char *)&req->reply[4]);
 762                                 voltage = req->reply[5];
 763                                 break;
 764                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 765                                 max = (req->reply[4] << 8) | req->reply[5];
 766                                 amperage = *((signed short *)&req->reply[6]);
 767                                 voltage = (req->reply[8] << 8) | req->reply[9];
 768                                 break;
 769                         default:
 770                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 771                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 772                                 break;
 773                 }
 774         }
 775
 776         if ((req->reply[1] & 0x01) && (amperage > 0))
 777                 bat_flags |= PMU_BATT_CHARGING;
 778
 779         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 780         pmu_batteries[pmu_cur_battery].charge = capa;
 781         pmu_batteries[pmu_cur_battery].max_charge = max;
 782         pmu_batteries[pmu_cur_battery].amperage = amperage;
 783         pmu_batteries[pmu_cur_battery].voltage = voltage;
 784         if (amperage) {
 785                 if ((req->reply[1] & 0x01) && (amperage > 0))
 786                         pmu_batteries[pmu_cur_battery].time_remaining
 787                                 = ((max-capa) * 3600) / amperage;
 788                 else
 789                         pmu_batteries[pmu_cur_battery].time_remaining
 790                                 = (capa * 3600) / (-amperage);
 791         } else
 792                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 793
 794         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 795
 796         clear_bit(0, &async_req_locks);
 797 }
 798
 799 static void
 800 query_battery_state(void)
 801 {
 802         if (test_and_set_bit(0, &async_req_locks))
 803                 return;
 804         if (pmu_kind == PMU_OHARE_BASED)
 805                 pmu_request(&batt_req, done_battery_state_ohare,
 806                         1, PMU_BATTERY_STATE);
 807         else
 808                 pmu_request(&batt_req, done_battery_state_smart,
 809                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 810 }
 811
 812 static int
 813 proc_get_info(char *page, char **start, off_t off,
 814                 int count, int *eof, void *data)
 815 {
 816         char* p = page;
 817
 818         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 819         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 820         p += sprintf(p, "AC Power               : %d\n",
 821                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 822         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 823
 824         return p - page;
 825 }
 826
 827 static int
 828 proc_get_irqstats(char *page, char **start, off_t off,
 829                   int count, int *eof, void *data)
 830 {
 831         int i;
 832         char* p = page;
 833         static const char *irq_names[] = {
 834                 "Total CB1 triggered events",
 835                 "Total GPIO1 triggered events",
 836                 "PC-Card eject button",
 837                 "Sound/Brightness button",
 838                 "ADB message",
 839                 "Battery state change",
 840                 "Environment interrupt",
 841                 "Tick timer",
 842                 "Ghost interrupt (zero len)",
 843                 "Empty interrupt (empty mask)",
 844                 "Max irqs in a row"
 845         };
 846
 847         for (i=0; i<11; i++) {
 848                 p += sprintf(p, " %2u: %10u (%s)\n",
 849                              i, pmu_irq_stats[i], irq_names[i]);
 850         }
 851         return p - page;
 852 }
 853
 854 static int
 855 proc_get_batt(char *page, char **start, off_t off,
 856                 int count, int *eof, void *data)
 857 {
 858         long batnum = (long)data;
 859         char *p = page;
 860
 861         p += sprintf(p, "\n");
 862         p += sprintf(p, "flags      : %08x\n",
 863                 pmu_batteries[batnum].flags);
 864         p += sprintf(p, "charge     : %d\n",
 865                 pmu_batteries[batnum].charge);
 866         p += sprintf(p, "max_charge : %d\n",
 867                 pmu_batteries[batnum].max_charge);
 868         p += sprintf(p, "current    : %d\n",
 869                 pmu_batteries[batnum].amperage);
 870         p += sprintf(p, "voltage    : %d\n",
 871                 pmu_batteries[batnum].voltage);
 872         p += sprintf(p, "time rem.  : %d\n",
 873                 pmu_batteries[batnum].time_remaining);
 874
 875         return p - page;
 876 }
 877
 878 static int
 879 proc_read_options(char *page, char **start, off_t off,
 880                         int count, int *eof, void *data)
 881 {
 882         char *p = page;
 883
 884 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 885         if (pmu_kind == PMU_KEYLARGO_BASED &&
 886             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 887                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 888 #endif
 889         if (pmu_kind == PMU_KEYLARGO_BASED)
 890                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 891
 892         return p - page;
 893 }
 894
 895 static int
 896 proc_write_options(struct file *file, const char __user *buffer,
 897                         unsigned long count, void *data)
 898 {
 899         char tmp[33];
 900         char *label, *val;
 901         unsigned long fcount = count;
 902
 903         if (!count)
 904                 return -EINVAL;
 905         if (count > 32)
 906                 count = 32;
 907         if (copy_from_user(tmp, buffer, count))
 908                 return -EFAULT;
 909         tmp[count] = 0;
 910
 911         label = tmp;
 912         while(*label == ' ')
 913                 label++;
 914         val = label;
 915         while(*val && (*val != '=')) {
 916                 if (*val == ' ')
 917                         *val = 0;
 918                 val++;
 919         }
 920         if ((*val) == 0)
 921                 return -EINVAL;
 922         *(val++) = 0;
 923         while(*val == ' ')
 924                 val++;
 925 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
 926         if (pmu_kind == PMU_KEYLARGO_BASED &&
 927             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 928                 if (!strcmp(label, "lid_wakeup"))
 929                         option_lid_wakeup = ((*val) == '1');
 930 #endif
 931         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 932                 int new_value;
 933                 new_value = ((*val) == '1');
 934                 if (new_value != option_server_mode)
 935                         pmu_set_server_mode(new_value);
 936         }
 937         return fcount;
 938 }
 939
 940 #ifdef CONFIG_ADB
 941 /* Send an ADB command */
 942 static int
 943 pmu_send_request(struct adb_request *req, int sync)
 944 {
 945         int i, ret;
 946
 947         if ((vias == NULL) || (!pmu_fully_inited)) {
 948                 req->complete = 1;
 949                 return -ENXIO;
 950         }
 951
 952         ret = -EINVAL;
 953
 954         switch (req->data[0]) {
 955         case PMU_PACKET:
 956                 for (i = 0; i < req->nbytes - 1; ++i)
 957                         req->data[i] = req->data[i+1];
 958                 --req->nbytes;
 959                 if (pmu_data_len[req->data[0]][1] != 0) {
 960                         req->reply[0] = ADB_RET_OK;
 961                         req->reply_len = 1;
 962                 } else
 963                         req->reply_len = 0;
 964                 ret = pmu_queue_request(req);
 965                 break;
 966         case CUDA_PACKET:
 967                 switch (req->data[1]) {
 968                 case CUDA_GET_TIME:
 969                         if (req->nbytes != 2)
 970                                 break;
 971                         req->data[0] = PMU_READ_RTC;
 972                         req->nbytes = 1;
 973                         req->reply_len = 3;
 974                         req->reply[0] = CUDA_PACKET;
 975                         req->reply[1] = 0;
 976                         req->reply[2] = CUDA_GET_TIME;
 977                         ret = pmu_queue_request(req);
 978                         break;
 979                 case CUDA_SET_TIME:
 980                         if (req->nbytes != 6)
 981                                 break;
 982                         req->data[0] = PMU_SET_RTC;
 983                         req->nbytes = 5;
 984                         for (i = 1; i <= 4; ++i)
 985                                 req->data[i] = req->data[i+1];
 986                         req->reply_len = 3;
 987                         req->reply[0] = CUDA_PACKET;
 988                         req->reply[1] = 0;
 989                         req->reply[2] = CUDA_SET_TIME;
 990                         ret = pmu_queue_request(req);
 991                         break;
 992                 }
 993                 break;
 994         case ADB_PACKET:
 995                 if (!pmu_has_adb)
 996                         return -ENXIO;
 997                 for (i = req->nbytes - 1; i > 1; --i)
 998                         req->data[i+2] = req->data[i];
 999                 req->data[3] = req->nbytes - 2;
1000                 req->data[2] = pmu_adb_flags;
1001                 /*req->data[1] = req->data[1];*/
1002                 req->data[0] = PMU_ADB_CMD;
1003                 req->nbytes += 2;
1004                 req->reply_expected = 1;
1005                 req->reply_len = 0;
1006                 ret = pmu_queue_request(req);
1007                 break;
1008         }
1009         if (ret) {
1010                 req->complete = 1;
1011                 return ret;
1012         }
1013
1014         if (sync)
1015                 while (!req->complete)
1016                         pmu_poll();
1017
1018         return 0;
1019 }
1020
1021 /* Enable/disable autopolling */
1022 static int
1023 pmu_adb_autopoll(int devs)
1024 {
1025         struct adb_request req;
1026
1027         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1028                 return -ENXIO;
1029
1030         if (devs) {
1031                 adb_dev_map = devs;
1032                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1033                             adb_dev_map >> 8, adb_dev_map);
1034                 pmu_adb_flags = 2;
1035         } else {
1036                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1037                 pmu_adb_flags = 0;
1038         }
1039         while (!req.complete)
1040                 pmu_poll();
1041         return 0;
1042 }
1043
1044 /* Reset the ADB bus */
1045 static int
1046 pmu_adb_reset_bus(void)
1047 {
1048         struct adb_request req;
1049         int save_autopoll = adb_dev_map;
1050
1051         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1052                 return -ENXIO;
1053
1054         /* anyone got a better idea?? */
1055         pmu_adb_autopoll(0);
1056
1057         req.nbytes = 5;
1058         req.done = NULL;
1059         req.data[0] = PMU_ADB_CMD;
1060         req.data[1] = 0;
1061         req.data[2] = ADB_BUSRESET;
1062         req.data[3] = 0;
1063         req.data[4] = 0;
1064         req.reply_len = 0;
1065         req.reply_expected = 1;
1066         if (pmu_queue_request(&req) != 0) {
1067                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1068                 return -EIO;
1069         }
1070         pmu_wait_complete(&req);
1071
1072         if (save_autopoll != 0)
1073                 pmu_adb_autopoll(save_autopoll);
1074
1075         return 0;
1076 }
1077 #endif /* CONFIG_ADB */
1078
1079 /* Construct and send a pmu request */
1080 int
1081 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1082             int nbytes, ...)
1083 {
1084         va_list list;
1085         int i;
1086
1087         if (vias == NULL)
1088                 return -ENXIO;
1089
1090         if (nbytes < 0 || nbytes > 32) {
1091                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1092                 req->complete = 1;
1093                 return -EINVAL;
1094         }
1095         req->nbytes = nbytes;
1096         req->done = done;
1097         va_start(list, nbytes);
1098         for (i = 0; i < nbytes; ++i)
1099                 req->data[i] = va_arg(list, int);
1100         va_end(list);
1101         req->reply_len = 0;
1102         req->reply_expected = 0;
1103         return pmu_queue_request(req);
1104 }
1105
1106 int
1107 pmu_queue_request(struct adb_request *req)
1108 {
1109         unsigned long flags;
1110         int nsend;
1111
1112         if (via == NULL) {
1113                 req->complete = 1;
1114                 return -ENXIO;
1115         }
1116         if (req->nbytes <= 0) {
1117                 req->complete = 1;
1118                 return 0;
1119         }
1120         nsend = pmu_data_len[req->data[0]][0];
1121         if (nsend >= 0 && req->nbytes != nsend + 1) {
1122                 req->complete = 1;
1123                 return -EINVAL;
1124         }
1125
1126         req->next = NULL;
1127         req->sent = 0;
1128         req->complete = 0;
1129
1130         spin_lock_irqsave(&pmu_lock, flags);
1131         if (current_req != 0) {
1132                 last_req->next = req;
1133                 last_req = req;
1134         } else {
1135                 current_req = req;
1136                 last_req = req;
1137                 if (pmu_state == idle)
1138                         pmu_start();
1139         }
1140         spin_unlock_irqrestore(&pmu_lock, flags);
1141
1142         return 0;
1143 }
1144
1145 static inline void
1146 wait_for_ack(void)
1147 {
1148         /* Sightly increased the delay, I had one occurrence of the message
1149          * reported
1150          */
1151         int timeout = 4000;
1152         while ((in_8(&via[B]) & TACK) == 0) {
1153                 if (--timeout < 0) {
1154                         printk(KERN_ERR "PMU not responding (!ack)\n");
1155                         return;
1156                 }
1157                 udelay(10);
1158         }
1159 }
1160
1161 /* New PMU seems to be very sensitive to those timings, so we make sure
1162  * PCI is flushed immediately */
1163 static inline void
1164 send_byte(int x)
1165 {
1166         volatile unsigned char __iomem *v = via;
1167
1168         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1169         out_8(&v[SR], x);
1170         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1171         (void)in_8(&v[B]);
1172 }
1173
1174 static inline void
1175 recv_byte(void)
1176 {
1177         volatile unsigned char __iomem *v = via;
1178
1179         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1180         in_8(&v[SR]);           /* resets SR */
1181         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1182         (void)in_8(&v[B]);
1183 }
1184
1185 static inline void
1186 pmu_done(struct adb_request *req)
1187 {
1188         void (*done)(struct adb_request *) = req->done;
1189         mb();
1190         req->complete = 1;
1191         /* Here, we assume that if the request has a done member, the
1192          * struct request will survive to setting req->complete to 1
1193          */
1194         if (done)
1195                 (*done)(req);
1196 }
1197
1198 static void
1199 pmu_start(void)
1200 {
1201         struct adb_request *req;
1202
1203         /* assert pmu_state == idle */
1204         /* get the packet to send */
1205         req = current_req;
1206         if (req == 0 || pmu_state != idle
1207             || (/*req->reply_expected && */req_awaiting_reply))
1208                 return;
1209
1210         pmu_state = sending;
1211         data_index = 1;
1212         data_len = pmu_data_len[req->data[0]][0];
1213
1214         /* Sounds safer to make sure ACK is high before writing. This helped
1215          * kill a problem with ADB and some iBooks
1216          */
1217         wait_for_ack();
1218         /* set the shift register to shift out and send a byte */
1219         send_byte(req->data[0]);
1220 }
1221
1222 void
1223 pmu_poll(void)
1224 {
1225         if (!via)
1226                 return;
1227         if (disable_poll)
1228                 return;
1229         via_pmu_interrupt(0, NULL);
1230 }
1231
1232 void
1233 pmu_poll_adb(void)
1234 {
1235         if (!via)
1236                 return;
1237         if (disable_poll)
1238                 return;
1239         /* Kicks ADB read when PMU is suspended */
1240         adb_int_pending = 1;
1241         do {
1242                 via_pmu_interrupt(0, NULL);
1243         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1244                 || req_awaiting_reply));
1245 }
1246
1247 void
1248 pmu_wait_complete(struct adb_request *req)
1249 {
1250         if (!via)
1251                 return;
1252         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1253                 via_pmu_interrupt(0, NULL);
1254 }
1255
1256 /* This function loops until the PMU is idle and prevents it from
1257  * anwsering to ADB interrupts. pmu_request can still be called.
1258  * This is done to avoid spurrious shutdowns when we know we'll have
1259  * interrupts switched off for a long time
1260  */
1261 void
1262 pmu_suspend(void)
1263 {
1264         unsigned long flags;
1265
1266         if (!via)
1267                 return;
1268
1269         spin_lock_irqsave(&pmu_lock, flags);
1270         pmu_suspended++;
1271         if (pmu_suspended > 1) {
1272                 spin_unlock_irqrestore(&pmu_lock, flags);
1273                 return;
1274         }
1275
1276         do {
1277                 spin_unlock_irqrestore(&pmu_lock, flags);
1278                 if (req_awaiting_reply)
1279                         adb_int_pending = 1;
1280                 via_pmu_interrupt(0, NULL);
1281                 spin_lock_irqsave(&pmu_lock, flags);
1282                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1283                         if (gpio_irq >= 0)
1284                                 disable_irq_nosync(gpio_irq);
1285                         out_8(&via[IER], CB1_INT | IER_CLR);
1286                         spin_unlock_irqrestore(&pmu_lock, flags);
1287                         break;
1288                 }
1289         } while (1);
1290 }
1291
1292 void
1293 pmu_resume(void)
1294 {
1295         unsigned long flags;
1296
1297         if (!via || (pmu_suspended < 1))
1298                 return;
1299
1300         spin_lock_irqsave(&pmu_lock, flags);
1301         pmu_suspended--;
1302         if (pmu_suspended > 0) {
1303                 spin_unlock_irqrestore(&pmu_lock, flags);
1304                 return;
1305         }
1306         adb_int_pending = 1;
1307         if (gpio_irq >= 0)
1308                 enable_irq(gpio_irq);
1309         out_8(&via[IER], CB1_INT | IER_SET);
1310         spin_unlock_irqrestore(&pmu_lock, flags);
1311         pmu_poll();
1312 }
1313
1314 /* Interrupt data could be the result data from an ADB cmd */
1315 static void
1316 pmu_handle_data(unsigned char *data, int len)
1317 {
1318         unsigned char ints, pirq;
1319         int i = 0;
1320
1321         asleep = 0;
1322         if (drop_interrupts || len < 1) {
1323                 adb_int_pending = 0;
1324                 pmu_irq_stats[8]++;
1325                 return;
1326         }
1327
1328         /* Get PMU interrupt mask */
1329         ints = data[0];
1330
1331         /* Record zero interrupts for stats */
1332         if (ints == 0)
1333                 pmu_irq_stats[9]++;
1334
1335         /* Hack to deal with ADB autopoll flag */
1336         if (ints & PMU_INT_ADB)
1337                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1338
1339 next:
1340
1341         if (ints == 0) {
1342                 if (i > pmu_irq_stats[10])
1343                         pmu_irq_stats[10] = i;
1344                 return;
1345         }
1346
1347         for (pirq = 0; pirq < 8; pirq++)
1348                 if (ints & (1 << pirq))
1349                         break;
1350         pmu_irq_stats[pirq]++;
1351         i++;
1352         ints &= ~(1 << pirq);
1353
1354         /* Note: for some reason, we get an interrupt with len=1,
1355          * data[0]==0 after each normal ADB interrupt, at least
1356          * on the Pismo. Still investigating...  --BenH
1357          */
1358         if ((1 << pirq) & PMU_INT_ADB) {
1359                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1360                         struct adb_request *req = req_awaiting_reply;
1361                         if (req == 0) {
1362                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1363                                 return;
1364                         }
1365                         req_awaiting_reply = NULL;
1366                         if (len <= 2)
1367                                 req->reply_len = 0;
1368                         else {
1369                                 memcpy(req->reply, data + 1, len - 1);
1370                                 req->reply_len = len - 1;
1371                         }
1372                         pmu_done(req);
1373                 } else {
1374                         if (len == 4 && data[1] == 0x2c) {
1375                                 extern int xmon_wants_key, xmon_adb_keycode;
1376                                 if (xmon_wants_key) {
1377                                         xmon_adb_keycode = data[2];
1378                                         return;
1379                                 }
1380                         }
1381 #ifdef CONFIG_ADB
1382                         /*
1383                          * XXX On the [23]400 the PMU gives us an up
1384                          * event for keycodes 0x74 or 0x75 when the PC
1385                          * card eject buttons are released, so we
1386                          * ignore those events.
1387                          */
1388                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1389                               && data[1] == 0x2c && data[3] == 0xff
1390                               && (data[2] & ~1) == 0xf4))
1391                                 adb_input(data+1, len-1, 1);
1392 #endif /* CONFIG_ADB */
1393                 }
1394         }
1395         /* Sound/brightness button pressed */
1396         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1397 #ifdef CONFIG_PMAC_BACKLIGHT
1398                 if (len == 3)
1399                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1400 #endif
1401         }
1402         /* Tick interrupt */
1403         else if ((1 << pirq) & PMU_INT_TICK) {
1404                 /* Environement or tick interrupt, query batteries */
1405                 if (pmu_battery_count) {
1406                         if ((--query_batt_timer) == 0) {
1407                                 query_battery_state();
1408                                 query_batt_timer = BATTERY_POLLING_COUNT;
1409                         }
1410                 }
1411         }
1412         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1413                 if (pmu_battery_count)
1414                         query_battery_state();
1415                 pmu_pass_intr(data, len);
1416                 /* len == 6 is probably a bad check. But how do I
1417                  * know what PMU versions send what events here? */
1418                 if (len == 6) {
1419                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1420                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1421                 }
1422         } else {
1423                pmu_pass_intr(data, len);
1424         }
1425         goto next;
1426 }
1427
1428 static struct adb_request*
1429 pmu_sr_intr(void)
1430 {
1431         struct adb_request *req;
1432         int bite = 0;
1433
1434         if (via[B] & TREQ) {
1435                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1436                 out_8(&via[IFR], SR_INT);
1437                 return NULL;
1438         }
1439         /* The ack may not yet be low when we get the interrupt */
1440         while ((in_8(&via[B]) & TACK) != 0)
1441                         ;
1442
1443         /* if reading grab the byte, and reset the interrupt */
1444         if (pmu_state == reading || pmu_state == reading_intr)
1445                 bite = in_8(&via[SR]);
1446
1447         /* reset TREQ and wait for TACK to go high */
1448         out_8(&via[B], in_8(&via[B]) | TREQ);
1449         wait_for_ack();
1450
1451         switch (pmu_state) {
1452         case sending:
1453                 req = current_req;
1454                 if (data_len < 0) {
1455                         data_len = req->nbytes - 1;
1456                         send_byte(data_len);
1457                         break;
1458                 }
1459                 if (data_index <= data_len) {
1460                         send_byte(req->data[data_index++]);
1461                         break;
1462                 }
1463                 req->sent = 1;
1464                 data_len = pmu_data_len[req->data[0]][1];
1465                 if (data_len == 0) {
1466                         pmu_state = idle;
1467                         current_req = req->next;
1468                         if (req->reply_expected)
1469                                 req_awaiting_reply = req;
1470                         else
1471                                 return req;
1472                 } else {
1473                         pmu_state = reading;
1474                         data_index = 0;
1475                         reply_ptr = req->reply + req->reply_len;
1476                         recv_byte();
1477                 }
1478                 break;
1479
1480         case intack:
1481                 data_index = 0;
1482                 data_len = -1;
1483                 pmu_state = reading_intr;
1484                 reply_ptr = interrupt_data[int_data_last];
1485                 recv_byte();
1486                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1487                         enable_irq(gpio_irq);
1488                         gpio_irq_enabled = 1;
1489                 }
1490                 break;
1491
1492         case reading:
1493         case reading_intr:
1494                 if (data_len == -1) {
1495                         data_len = bite;
1496                         if (bite > 32)
1497                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1498                 } else if (data_index < 32) {
1499                         reply_ptr[data_index++] = bite;
1500                 }
1501                 if (data_index < data_len) {
1502                         recv_byte();
1503                         break;
1504                 }
1505
1506                 if (pmu_state == reading_intr) {
1507                         pmu_state = idle;
1508                         int_data_state[int_data_last] = int_data_ready;
1509                         interrupt_data_len[int_data_last] = data_len;
1510                 } else {
1511                         req = current_req;
1512                         /*
1513                          * For PMU sleep and freq change requests, we lock the
1514                          * PMU until it's explicitly unlocked. This avoids any
1515                          * spurrious event polling getting in
1516                          */
1517                         current_req = req->next;
1518                         req->reply_len += data_index;
1519                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1520                                 pmu_state = locked;
1521                         else
1522                                 pmu_state = idle;
1523                         return req;
1524                 }
1525                 break;
1526
1527         default:
1528                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1529                        pmu_state);
1530         }
1531         return NULL;
1532 }
1533
1534 static irqreturn_t
1535 via_pmu_interrupt(int irq, void *arg)
1536 {
1537         unsigned long flags;
1538         int intr;
1539         int nloop = 0;
1540         int int_data = -1;
1541         struct adb_request *req = NULL;
1542         int handled = 0;
1543
1544         /* This is a bit brutal, we can probably do better */
1545         spin_lock_irqsave(&pmu_lock, flags);
1546         ++disable_poll;
1547
1548         for (;;) {
1549                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1550                 if (intr == 0)
1551                         break;
1552                 handled = 1;
1553                 if (++nloop > 1000) {
1554                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1555                                "intr=%x, ier=%x pmu_state=%d\n",
1556                                intr, in_8(&via[IER]), pmu_state);
1557                         break;
1558                 }
1559                 out_8(&via[IFR], intr);
1560                 if (intr & CB1_INT) {
1561                         adb_int_pending = 1;
1562                         pmu_irq_stats[0]++;
1563                 }
1564                 if (intr & SR_INT) {
1565                         req = pmu_sr_intr();
1566                         if (req)
1567                                 break;
1568                 }
1569         }
1570
1571 recheck:
1572         if (pmu_state == idle) {
1573                 if (adb_int_pending) {
1574                         if (int_data_state[0] == int_data_empty)
1575                                 int_data_last = 0;
1576                         else if (int_data_state[1] == int_data_empty)
1577                                 int_data_last = 1;
1578                         else
1579                                 goto no_free_slot;
1580                         pmu_state = intack;
1581                         int_data_state[int_data_last] = int_data_fill;
1582                         /* Sounds safer to make sure ACK is high before writing.
1583                          * This helped kill a problem with ADB and some iBooks
1584                          */
1585                         wait_for_ack();
1586                         send_byte(PMU_INT_ACK);
1587                         adb_int_pending = 0;
1588                 } else if (current_req)
1589                         pmu_start();
1590         }
1591 no_free_slot:
1592         /* Mark the oldest buffer for flushing */
1593         if (int_data_state[!int_data_last] == int_data_ready) {
1594                 int_data_state[!int_data_last] = int_data_flush;
1595                 int_data = !int_data_last;
1596         } else if (int_data_state[int_data_last] == int_data_ready) {
1597                 int_data_state[int_data_last] = int_data_flush;
1598                 int_data = int_data_last;
1599         }
1600         --disable_poll;
1601         spin_unlock_irqrestore(&pmu_lock, flags);
1602
1603         /* Deal with completed PMU requests outside of the lock */
1604         if (req) {
1605                 pmu_done(req);
1606                 req = NULL;
1607         }
1608
1609         /* Deal with interrupt datas outside of the lock */
1610         if (int_data >= 0) {
1611                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1612                 spin_lock_irqsave(&pmu_lock, flags);
1613                 ++disable_poll;
1614                 int_data_state[int_data] = int_data_empty;
1615                 int_data = -1;
1616                 goto recheck;
1617         }
1618
1619         return IRQ_RETVAL(handled);
1620 }
1621
1622 void
1623 pmu_unlock(void)
1624 {
1625         unsigned long flags;
1626
1627         spin_lock_irqsave(&pmu_lock, flags);
1628         if (pmu_state == locked)
1629                 pmu_state = idle;
1630         adb_int_pending = 1;
1631         spin_unlock_irqrestore(&pmu_lock, flags);
1632 }
1633
1634
1635 static irqreturn_t
1636 gpio1_interrupt(int irq, void *arg)
1637 {
1638         unsigned long flags;
1639
1640         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1641                 spin_lock_irqsave(&pmu_lock, flags);
1642                 if (gpio_irq_enabled > 0) {
1643                         disable_irq_nosync(gpio_irq);
1644                         gpio_irq_enabled = 0;
1645                 }
1646                 pmu_irq_stats[1]++;
1647                 adb_int_pending = 1;
1648                 spin_unlock_irqrestore(&pmu_lock, flags);
1649                 via_pmu_interrupt(0, NULL);
1650                 return IRQ_HANDLED;
1651         }
1652         return IRQ_NONE;
1653 }
1654
1655 void
1656 pmu_enable_irled(int on)
1657 {
1658         struct adb_request req;
1659
1660         if (vias == NULL)
1661                 return ;
1662         if (pmu_kind == PMU_KEYLARGO_BASED)
1663                 return ;
1664
1665         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1666             (on ? PMU_POW_ON : PMU_POW_OFF));
1667         pmu_wait_complete(&req);
1668 }
1669
1670 void
1671 pmu_restart(void)
1672 {
1673         struct adb_request req;
1674
1675         if (via == NULL)
1676                 return;
1677
1678         local_irq_disable();
1679
1680         drop_interrupts = 1;
1681
1682         if (pmu_kind != PMU_KEYLARGO_BASED) {
1683                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1684                                                 PMU_INT_TICK );
1685                 while(!req.complete)
1686                         pmu_poll();
1687         }
1688
1689         pmu_request(&req, NULL, 1, PMU_RESET);
1690         pmu_wait_complete(&req);
1691         for (;;)
1692                 ;
1693 }
1694
1695 void
1696 pmu_shutdown(void)
1697 {
1698         struct adb_request req;
1699
1700         if (via == NULL)
1701                 return;
1702
1703         local_irq_disable();
1704
1705         drop_interrupts = 1;
1706
1707         if (pmu_kind != PMU_KEYLARGO_BASED) {
1708                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1709                                                 PMU_INT_TICK );
1710                 pmu_wait_complete(&req);
1711         } else {
1712                 /* Disable server mode on shutdown or we'll just
1713                  * wake up again
1714                  */
1715                 pmu_set_server_mode(0);
1716         }
1717
1718         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1719                     'M', 'A', 'T', 'T');
1720         pmu_wait_complete(&req);
1721         for (;;)
1722                 ;
1723 }
1724
1725 int
1726 pmu_present(void)
1727 {
1728         return via != 0;
1729 }
1730
1731 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
1732 #ifdef DEBUG_SLEEP
1733 /* N.B. This doesn't work on the 3400 */
1734 void
1735 pmu_blink(int n)
1736 {
1737         struct adb_request req;
1738
1739         memset(&req, 0, sizeof(req));
1740
1741         for (; n > 0; --n) {
1742                 req.nbytes = 4;
1743                 req.done = NULL;
1744                 req.data[0] = 0xee;
1745                 req.data[1] = 4;
1746                 req.data[2] = 0;
1747                 req.data[3] = 1;
1748                 req.reply[0] = ADB_RET_OK;
1749                 req.reply_len = 1;
1750                 req.reply_expected = 0;
1751                 pmu_polled_request(&req);
1752                 mdelay(50);
1753                 req.nbytes = 4;
1754                 req.done = NULL;
1755                 req.data[0] = 0xee;
1756                 req.data[1] = 4;
1757                 req.data[2] = 0;
1758                 req.data[3] = 0;
1759                 req.reply[0] = ADB_RET_OK;
1760                 req.reply_len = 1;
1761                 req.reply_expected = 0;
1762                 pmu_polled_request(&req);
1763                 mdelay(50);
1764         }
1765         mdelay(50);
1766 }
1767 #endif
1768
1769 /*
1770  * Put the powerbook to sleep.
1771  */
1772
1773 static u32 save_via[8];
1774
1775 static void
1776 save_via_state(void)
1777 {
1778         save_via[0] = in_8(&via[ANH]);
1779         save_via[1] = in_8(&via[DIRA]);
1780         save_via[2] = in_8(&via[B]);
1781         save_via[3] = in_8(&via[DIRB]);
1782         save_via[4] = in_8(&via[PCR]);
1783         save_via[5] = in_8(&via[ACR]);
1784         save_via[6] = in_8(&via[T1CL]);
1785         save_via[7] = in_8(&via[T1CH]);
1786 }
1787 static void
1788 restore_via_state(void)
1789 {
1790         out_8(&via[ANH], save_via[0]);
1791         out_8(&via[DIRA], save_via[1]);
1792         out_8(&via[B], save_via[2]);
1793         out_8(&via[DIRB], save_via[3]);
1794         out_8(&via[PCR], save_via[4]);
1795         out_8(&via[ACR], save_via[5]);
1796         out_8(&via[T1CL], save_via[6]);
1797         out_8(&via[T1CH], save_via[7]);
1798         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1799         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1800         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1801 }
1802
1803 extern void pmu_backlight_set_sleep(int sleep);
1804
1805 static int
1806 pmac_suspend_devices(void)
1807 {
1808         int ret;
1809
1810         pm_prepare_console();
1811
1812         /* Sync the disks. */
1813         /* XXX It would be nice to have some way to ensure that
1814          * nobody is dirtying any new buffers while we wait. That
1815          * could be achieved using the refrigerator for processes
1816          * that swsusp uses
1817          */
1818         sys_sync();
1819
1820         /* Send suspend call to devices, hold the device core's dpm_sem */
1821         ret = device_suspend(PMSG_SUSPEND);
1822         if (ret) {
1823                 printk(KERN_ERR "Driver sleep failed\n");
1824                 return -EBUSY;
1825         }
1826
1827 #ifdef CONFIG_PMAC_BACKLIGHT
1828         /* Tell backlight code not to muck around with the chip anymore */
1829         pmu_backlight_set_sleep(1);
1830 #endif
1831
1832         /* Call platform functions marked "on sleep" */
1833         pmac_pfunc_i2c_suspend();
1834         pmac_pfunc_base_suspend();
1835
1836         /* Stop preemption */
1837         preempt_disable();
1838
1839         /* Make sure the decrementer won't interrupt us */
1840         asm volatile("mtdec %0" : : "r" (0x7fffffff));
1841         /* Make sure any pending DEC interrupt occurring while we did
1842          * the above didn't re-enable the DEC */
1843         mb();
1844         asm volatile("mtdec %0" : : "r" (0x7fffffff));
1845
1846         /* We can now disable MSR_EE. This code of course works properly only
1847          * on UP machines... For SMP, if we ever implement sleep, we'll have to
1848          * stop the "other" CPUs way before we do all that stuff.
1849          */
1850         local_irq_disable();
1851
1852         /* Broadcast power down irq
1853          * This isn't that useful in most cases (only directly wired devices can
1854          * use this but still... This will take care of sysdev's as well, so
1855          * we exit from here with local irqs disabled and PIC off.
1856          */
1857         ret = device_power_down(PMSG_SUSPEND);
1858         if (ret) {
1859                 wakeup_decrementer();
1860                 local_irq_enable();
1861                 preempt_enable();
1862                 device_resume();
1863                 printk(KERN_ERR "Driver powerdown failed\n");
1864                 return -EBUSY;
1865         }
1866
1867         /* Wait for completion of async requests */
1868         while (!batt_req.complete)
1869                 pmu_poll();
1870
1871         /* Giveup the lazy FPU & vec so we don't have to back them
1872          * up from the low level code
1873          */
1874         enable_kernel_fp();
1875
1876 #ifdef CONFIG_ALTIVEC
1877         if (cpu_has_feature(CPU_FTR_ALTIVEC))
1878                 enable_kernel_altivec();
1879 #endif /* CONFIG_ALTIVEC */
1880
1881         return 0;
1882 }
1883
1884 static int
1885 pmac_wakeup_devices(void)
1886 {
1887         mdelay(100);
1888
1889 #ifdef CONFIG_PMAC_BACKLIGHT
1890         /* Tell backlight code it can use the chip again */
1891         pmu_backlight_set_sleep(0);
1892 #endif
1893
1894         /* Power back up system devices (including the PIC) */
1895         device_power_up();
1896
1897         /* Force a poll of ADB interrupts */
1898         adb_int_pending = 1;
1899         via_pmu_interrupt(0, NULL);
1900
1901         /* Restart jiffies & scheduling */
1902         wakeup_decrementer();
1903
1904         /* Re-enable local CPU interrupts */
1905         local_irq_enable();
1906         mdelay(10);
1907         preempt_enable();
1908
1909         /* Call platform functions marked "on wake" */
1910         pmac_pfunc_base_resume();
1911         pmac_pfunc_i2c_resume();
1912
1913         /* Resume devices */
1914         device_resume();
1915
1916         pm_restore_console();
1917
1918         return 0;
1919 }
1920
1921 #define GRACKLE_PM      (1<<7)
1922 #define GRACKLE_DOZE    (1<<5)
1923 #define GRACKLE_NAP     (1<<4)
1924 #define GRACKLE_SLEEP   (1<<3)
1925
1926 static int powerbook_sleep_grackle(void)
1927 {
1928         unsigned long save_l2cr;
1929         unsigned short pmcr1;
1930         struct adb_request req;
1931         int ret;
1932         struct pci_dev *grackle;
1933
1934         grackle = pci_get_bus_and_slot(0, 0);
1935         if (!grackle)
1936                 return -ENODEV;
1937
1938         ret = pmac_suspend_devices();
1939         if (ret) {
1940                 printk(KERN_ERR "Sleep rejected by devices\n");
1941                 return ret;
1942         }
1943
1944         /* Turn off various things. Darwin does some retry tests here... */
1945         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1946         pmu_wait_complete(&req);
1947         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1948                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1949         pmu_wait_complete(&req);
1950
1951         /* For 750, save backside cache setting and disable it */
1952         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1953
1954         if (!__fake_sleep) {
1955                 /* Ask the PMU to put us to sleep */
1956                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1957                 pmu_wait_complete(&req);
1958         }
1959
1960         /* The VIA is supposed not to be restored correctly*/
1961         save_via_state();
1962         /* We shut down some HW */
1963         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1964
1965         pci_read_config_word(grackle, 0x70, &pmcr1);
1966         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1967         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1968         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1969         pci_write_config_word(grackle, 0x70, pmcr1);
1970
1971         /* Call low-level ASM sleep handler */
1972         if (__fake_sleep)
1973                 mdelay(5000);
1974         else
1975                 low_sleep_handler();
1976
1977         /* We're awake again, stop grackle PM */
1978         pci_read_config_word(grackle, 0x70, &pmcr1);
1979         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1980         pci_write_config_word(grackle, 0x70, pmcr1);
1981
1982         pci_dev_put(grackle);
1983
1984         /* Make sure the PMU is idle */
1985         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1986         restore_via_state();
1987
1988         /* Restore L2 cache */
1989         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1990                 _set_L2CR(save_l2cr);
1991
1992         /* Restore userland MMU context */
1993         set_context(current->active_mm->context.id, current->active_mm->pgd);
1994
1995         /* Power things up */
1996         pmu_unlock();
1997         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1998         pmu_wait_complete(&req);
1999         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2000                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2001         pmu_wait_complete(&req);
2002         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2003                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2004         pmu_wait_complete(&req);
2005
2006         pmac_wakeup_devices();
2007
2008         return 0;
2009 }
2010
2011 static int
2012 powerbook_sleep_Core99(void)
2013 {
2014         unsigned long save_l2cr;
2015         unsigned long save_l3cr;
2016         struct adb_request req;
2017         int ret;
2018
2019         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
2020                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2021                 return -ENOSYS;
2022         }
2023
2024         if (num_online_cpus() > 1 || cpu_is_offline(0))
2025                 return -EAGAIN;
2026
2027         ret = pmac_suspend_devices();
2028         if (ret) {
2029                 printk(KERN_ERR "Sleep rejected by devices\n");
2030                 return ret;
2031         }
2032
2033         /* Stop environment and ADB interrupts */
2034         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
2035         pmu_wait_complete(&req);
2036
2037         /* Tell PMU what events will wake us up */
2038         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2039                 0xff, 0xff);
2040         pmu_wait_complete(&req);
2041         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2042                 0, PMU_PWR_WAKEUP_KEY |
2043                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2044         pmu_wait_complete(&req);
2045
2046         /* Save the state of the L2 and L3 caches */
2047         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2048         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2049
2050         if (!__fake_sleep) {
2051                 /* Ask the PMU to put us to sleep */
2052                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2053                 pmu_wait_complete(&req);
2054         }
2055
2056         /* The VIA is supposed not to be restored correctly*/
2057         save_via_state();
2058
2059         /* Shut down various ASICs. There's a chance that we can no longer
2060          * talk to the PMU after this, so I moved it to _after_ sending the
2061          * sleep command to it. Still need to be checked.
2062          */
2063         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2064
2065         /* Call low-level ASM sleep handler */
2066         if (__fake_sleep)
2067                 mdelay(5000);
2068         else
2069                 low_sleep_handler();
2070
2071         /* Restore Apple core ASICs state */
2072         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2073
2074         /* Restore VIA */
2075         restore_via_state();
2076
2077         /* tweak LPJ before cpufreq is there */
2078         loops_per_jiffy *= 2;
2079
2080         /* Restore video */
2081         pmac_call_early_video_resume();
2082
2083         /* Restore L2 cache */
2084         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2085                 _set_L2CR(save_l2cr);
2086         /* Restore L3 cache */
2087         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2088                 _set_L3CR(save_l3cr);
2089
2090         /* Restore userland MMU context */
2091         set_context(current->active_mm->context.id, current->active_mm->pgd);
2092
2093         /* Tell PMU we are ready */
2094         pmu_unlock();
2095         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2096         pmu_wait_complete(&req);
2097         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2098         pmu_wait_complete(&req);
2099
2100         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2101         loops_per_jiffy /= 2;
2102
2103         pmac_wakeup_devices();
2104
2105         return 0;
2106 }
2107
2108 #define PB3400_MEM_CTRL         0xf8000000
2109 #define PB3400_MEM_CTRL_SLEEP   0x70
2110
2111 static void __iomem *pb3400_mem_ctrl;
2112
2113 static void powerbook_sleep_init_3400(void)
2114 {
2115         /* map in the memory controller registers */
2116         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2117         if (pb3400_mem_ctrl == NULL)
2118                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2119 }
2120
2121 static int powerbook_sleep_3400(void)
2122 {
2123         int ret, i, x;
2124         unsigned int hid0;
2125         unsigned long msr;
2126         struct adb_request sleep_req;
2127         unsigned int __iomem *mem_ctrl_sleep;
2128
2129         if (pb3400_mem_ctrl == NULL)
2130                 return -ENOMEM;
2131         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2132
2133         ret = pmac_suspend_devices();
2134         if (ret) {
2135                 printk(KERN_ERR "Sleep rejected by devices\n");
2136                 return ret;
2137         }
2138
2139         /* Set the memory controller to keep the memory refreshed
2140            while we're asleep */
2141         for (i = 0x403f; i >= 0x4000; --i) {
2142                 out_be32(mem_ctrl_sleep, i);
2143                 do {
2144                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2145                 } while (x == 0);
2146                 if (x >= 0x100)
2147                         break;
2148         }
2149
2150         /* Ask the PMU to put us to sleep */
2151         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2152         pmu_wait_complete(&sleep_req);
2153         pmu_unlock();
2154
2155         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2156
2157         asleep = 1;
2158
2159         /* Put the CPU into sleep mode */
2160         hid0 = mfspr(SPRN_HID0);
2161         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2162         mtspr(SPRN_HID0, hid0);
2163         local_irq_enable();
2164         msr = mfmsr() | MSR_POW;
2165         while (asleep) {
2166                 mb();
2167                 mtmsr(msr);
2168                 isync();
2169         }
2170         local_irq_disable();
2171
2172         /* OK, we're awake again, start restoring things */
2173         out_be32(mem_ctrl_sleep, 0x3f);
2174         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2175
2176         pmac_wakeup_devices();
2177
2178         return 0;
2179 }
2180
2181 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2182
2183 /*
2184  * Support for /dev/pmu device
2185  */
2186 #define RB_SIZE         0x10
2187 struct pmu_private {
2188         struct list_head list;
2189         int     rb_get;
2190         int     rb_put;
2191         struct rb_entry {
2192                 unsigned short len;
2193                 unsigned char data[16];
2194         }       rb_buf[RB_SIZE];
2195         wait_queue_head_t wait;
2196         spinlock_t lock;
2197 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2198         int     backlight_locker;
2199 #endif
2200 };
2201
2202 static LIST_HEAD(all_pmu_pvt);
2203 static DEFINE_SPINLOCK(all_pvt_lock);
2204
2205 static void
2206 pmu_pass_intr(unsigned char *data, int len)
2207 {
2208         struct pmu_private *pp;
2209         struct list_head *list;
2210         int i;
2211         unsigned long flags;
2212
2213         if (len > sizeof(pp->rb_buf[0].data))
2214                 len = sizeof(pp->rb_buf[0].data);
2215         spin_lock_irqsave(&all_pvt_lock, flags);
2216         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2217                 pp = list_entry(list, struct pmu_private, list);
2218                 spin_lock(&pp->lock);
2219                 i = pp->rb_put + 1;
2220                 if (i >= RB_SIZE)
2221                         i = 0;
2222                 if (i != pp->rb_get) {
2223                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2224                         rp->len = len;
2225                         memcpy(rp->data, data, len);
2226                         pp->rb_put = i;
2227                         wake_up_interruptible(&pp->wait);
2228                 }
2229                 spin_unlock(&pp->lock);
2230         }
2231         spin_unlock_irqrestore(&all_pvt_lock, flags);
2232 }
2233
2234 static int
2235 pmu_open(struct inode *inode, struct file *file)
2236 {
2237         struct pmu_private *pp;
2238         unsigned long flags;
2239
2240         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2241         if (pp == 0)
2242                 return -ENOMEM;
2243         pp->rb_get = pp->rb_put = 0;
2244         spin_lock_init(&pp->lock);
2245         init_waitqueue_head(&pp->wait);
2246         spin_lock_irqsave(&all_pvt_lock, flags);
2247 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2248         pp->backlight_locker = 0;
2249 #endif
2250         list_add(&pp->list, &all_pmu_pvt);
2251         spin_unlock_irqrestore(&all_pvt_lock, flags);
2252         file->private_data = pp;
2253         return 0;
2254 }
2255
2256 static ssize_t
2257 pmu_read(struct file *file, char __user *buf,
2258                         size_t count, loff_t *ppos)
2259 {
2260         struct pmu_private *pp = file->private_data;
2261         DECLARE_WAITQUEUE(wait, current);
2262         unsigned long flags;
2263         int ret = 0;
2264
2265         if (count < 1 || pp == 0)
2266                 return -EINVAL;
2267         if (!access_ok(VERIFY_WRITE, buf, count))
2268                 return -EFAULT;
2269
2270         spin_lock_irqsave(&pp->lock, flags);
2271         add_wait_queue(&pp->wait, &wait);
2272         current->state = TASK_INTERRUPTIBLE;
2273
2274         for (;;) {
2275                 ret = -EAGAIN;
2276                 if (pp->rb_get != pp->rb_put) {
2277                         int i = pp->rb_get;
2278                         struct rb_entry *rp = &pp->rb_buf[i];
2279                         ret = rp->len;
2280                         spin_unlock_irqrestore(&pp->lock, flags);
2281                         if (ret > count)
2282                                 ret = count;
2283                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2284                                 ret = -EFAULT;
2285                         if (++i >= RB_SIZE)
2286                                 i = 0;
2287                         spin_lock_irqsave(&pp->lock, flags);
2288                         pp->rb_get = i;
2289                 }
2290                 if (ret >= 0)
2291                         break;
2292                 if (file->f_flags & O_NONBLOCK)
2293                         break;
2294                 ret = -ERESTARTSYS;
2295                 if (signal_pending(current))
2296                         break;
2297                 spin_unlock_irqrestore(&pp->lock, flags);
2298                 schedule();
2299                 spin_lock_irqsave(&pp->lock, flags);
2300         }
2301         current->state = TASK_RUNNING;
2302         remove_wait_queue(&pp->wait, &wait);
2303         spin_unlock_irqrestore(&pp->lock, flags);
2304
2305         return ret;
2306 }
2307
2308 static ssize_t
2309 pmu_write(struct file *file, const char __user *buf,
2310                          size_t count, loff_t *ppos)
2311 {
2312         return 0;
2313 }
2314
2315 static unsigned int
2316 pmu_fpoll(struct file *filp, poll_table *wait)
2317 {
2318         struct pmu_private *pp = filp->private_data;
2319         unsigned int mask = 0;
2320         unsigned long flags;
2321
2322         if (pp == 0)
2323                 return 0;
2324         poll_wait(filp, &pp->wait, wait);
2325         spin_lock_irqsave(&pp->lock, flags);
2326         if (pp->rb_get != pp->rb_put)
2327                 mask |= POLLIN;
2328         spin_unlock_irqrestore(&pp->lock, flags);
2329         return mask;
2330 }
2331
2332 static int
2333 pmu_release(struct inode *inode, struct file *file)
2334 {
2335         struct pmu_private *pp = file->private_data;
2336         unsigned long flags;
2337
2338         if (pp != 0) {
2339                 file->private_data = NULL;
2340                 spin_lock_irqsave(&all_pvt_lock, flags);
2341                 list_del(&pp->list);
2342                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2343
2344 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2345                 if (pp->backlight_locker)
2346                         pmac_backlight_enable();
2347 #endif
2348
2349                 kfree(pp);
2350         }
2351         return 0;
2352 }
2353
2354 static int
2355 pmu_ioctl(struct inode * inode, struct file *filp,
2356                      u_int cmd, u_long arg)
2357 {
2358         __u32 __user *argp = (__u32 __user *)arg;
2359         int error = -EINVAL;
2360
2361         switch (cmd) {
2362 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2363         case PMU_IOC_SLEEP:
2364                 if (!capable(CAP_SYS_ADMIN))
2365                         return -EACCES;
2366                 if (sleep_in_progress)
2367                         return -EBUSY;
2368                 sleep_in_progress = 1;
2369                 switch (pmu_kind) {
2370                 case PMU_OHARE_BASED:
2371                         error = powerbook_sleep_3400();
2372                         break;
2373                 case PMU_HEATHROW_BASED:
2374                 case PMU_PADDINGTON_BASED:
2375                         error = powerbook_sleep_grackle();
2376                         break;
2377                 case PMU_KEYLARGO_BASED:
2378                         error = powerbook_sleep_Core99();
2379                         break;
2380                 default:
2381                         error = -ENOSYS;
2382                 }
2383                 sleep_in_progress = 0;
2384                 break;
2385         case PMU_IOC_CAN_SLEEP:
2386                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0)
2387                         return put_user(0, argp);
2388                 else
2389                         return put_user(1, argp);
2390 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2391
2392 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2393         /* Compatibility ioctl's for backlight */
2394         case PMU_IOC_GET_BACKLIGHT:
2395         {
2396                 int brightness;
2397
2398                 if (sleep_in_progress)
2399                         return -EBUSY;
2400
2401                 brightness = pmac_backlight_get_legacy_brightness();
2402                 if (brightness < 0)
2403                         return brightness;
2404                 else
2405                         return put_user(brightness, argp);
2406
2407         }
2408         case PMU_IOC_SET_BACKLIGHT:
2409         {
2410                 int brightness;
2411
2412                 if (sleep_in_progress)
2413                         return -EBUSY;
2414
2415                 error = get_user(brightness, argp);
2416                 if (error)
2417                         return error;
2418
2419                 return pmac_backlight_set_legacy_brightness(brightness);
2420         }
2421 #ifdef CONFIG_INPUT_ADBHID
2422         case PMU_IOC_GRAB_BACKLIGHT: {
2423                 struct pmu_private *pp = filp->private_data;
2424
2425                 if (pp->backlight_locker)
2426                         return 0;
2427
2428                 pp->backlight_locker = 1;
2429                 pmac_backlight_disable();
2430
2431                 return 0;
2432         }
2433 #endif /* CONFIG_INPUT_ADBHID */
2434 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2435
2436         case PMU_IOC_GET_MODEL:
2437                 return put_user(pmu_kind, argp);
2438         case PMU_IOC_HAS_ADB:
2439                 return put_user(pmu_has_adb, argp);
2440         }
2441         return error;
2442 }
2443
2444 static const struct file_operations pmu_device_fops = {
2445         .read           = pmu_read,
2446         .write          = pmu_write,
2447         .poll           = pmu_fpoll,
2448         .ioctl          = pmu_ioctl,
2449         .open           = pmu_open,
2450         .release        = pmu_release,
2451 };
2452
2453 static struct miscdevice pmu_device = {
2454         PMU_MINOR, "pmu", &pmu_device_fops
2455 };
2456
2457 static int pmu_device_init(void)
2458 {
2459         if (!via)
2460                 return 0;
2461         if (misc_register(&pmu_device) < 0)
2462                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2463         return 0;
2464 }
2465 device_initcall(pmu_device_init);
2466
2467
2468 #ifdef DEBUG_SLEEP
2469 static inline void
2470 polled_handshake(volatile unsigned char __iomem *via)
2471 {
2472         via[B] &= ~TREQ; eieio();
2473         while ((via[B] & TACK) != 0)
2474                 ;
2475         via[B] |= TREQ; eieio();
2476         while ((via[B] & TACK) == 0)
2477                 ;
2478 }
2479
2480 static inline void
2481 polled_send_byte(volatile unsigned char __iomem *via, int x)
2482 {
2483         via[ACR] |= SR_OUT | SR_EXT; eieio();
2484         via[SR] = x; eieio();
2485         polled_handshake(via);
2486 }
2487
2488 static inline int
2489 polled_recv_byte(volatile unsigned char __iomem *via)
2490 {
2491         int x;
2492
2493         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2494         x = via[SR]; eieio();
2495         polled_handshake(via);
2496         x = via[SR]; eieio();
2497         return x;
2498 }
2499
2500 int
2501 pmu_polled_request(struct adb_request *req)
2502 {
2503         unsigned long flags;
2504         int i, l, c;
2505         volatile unsigned char __iomem *v = via;
2506
2507         req->complete = 1;
2508         c = req->data[0];
2509         l = pmu_data_len[c][0];
2510         if (l >= 0 && req->nbytes != l + 1)
2511                 return -EINVAL;
2512
2513         local_irq_save(flags);
2514         while (pmu_state != idle)
2515                 pmu_poll();
2516
2517         while ((via[B] & TACK) == 0)
2518                 ;
2519         polled_send_byte(v, c);
2520         if (l < 0) {
2521                 l = req->nbytes - 1;
2522                 polled_send_byte(v, l);
2523         }
2524         for (i = 1; i <= l; ++i)
2525                 polled_send_byte(v, req->data[i]);
2526
2527         l = pmu_data_len[c][1];
2528         if (l < 0)
2529                 l = polled_recv_byte(v);
2530         for (i = 0; i < l; ++i)
2531                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2532
2533         if (req->done)
2534                 (*req->done)(req);
2535
2536         local_irq_restore(flags);
2537         return 0;
2538 }
2539 #endif /* DEBUG_SLEEP */
2540
2541
2542 /* FIXME: This is a temporary set of callbacks to enable us
2543  * to do suspend-to-disk.
2544  */
2545
2546 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2547
2548 int pmu_sys_suspended;
2549
2550 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2551 {
2552         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2553                 return 0;
2554
2555         /* Suspend PMU event interrupts */
2556         pmu_suspend();
2557
2558         pmu_sys_suspended = 1;
2559         return 0;
2560 }
2561
2562 static int pmu_sys_resume(struct sys_device *sysdev)
2563 {
2564         struct adb_request req;
2565
2566         if (!pmu_sys_suspended)
2567                 return 0;
2568
2569         /* Tell PMU we are ready */
2570         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2571         pmu_wait_complete(&req);
2572
2573         /* Resume PMU event interrupts */
2574         pmu_resume();
2575
2576         pmu_sys_suspended = 0;
2577
2578         return 0;
2579 }
2580
2581 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2582
2583 static struct sysdev_class pmu_sysclass = {
2584         set_kset_name("pmu"),
2585 };
2586
2587 static struct sys_device device_pmu = {
2588         .cls            = &pmu_sysclass,
2589 };
2590
2591 static struct sysdev_driver driver_pmu = {
2592 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2593         .suspend        = &pmu_sys_suspend,
2594         .resume         = &pmu_sys_resume,
2595 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2596 };
2597
2598 static int __init init_pmu_sysfs(void)
2599 {
2600         int rc;
2601
2602         rc = sysdev_class_register(&pmu_sysclass);
2603         if (rc) {
2604                 printk(KERN_ERR "Failed registering PMU sys class\n");
2605                 return -ENODEV;
2606         }
2607         rc = sysdev_register(&device_pmu);
2608         if (rc) {
2609                 printk(KERN_ERR "Failed registering PMU sys device\n");
2610                 return -ENODEV;
2611         }
2612         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2613         if (rc) {
2614                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2615                 return -ENODEV;
2616         }
2617         return 0;
2618 }
2619
2620 subsys_initcall(init_pmu_sysfs);
2621
2622 EXPORT_SYMBOL(pmu_request);
2623 EXPORT_SYMBOL(pmu_queue_request);
2624 EXPORT_SYMBOL(pmu_poll);
2625 EXPORT_SYMBOL(pmu_poll_adb);
2626 EXPORT_SYMBOL(pmu_wait_complete);
2627 EXPORT_SYMBOL(pmu_suspend);
2628 EXPORT_SYMBOL(pmu_resume);
2629 EXPORT_SYMBOL(pmu_unlock);
2630 #if defined(CONFIG_PM_SLEEP) && defined(CONFIG_PPC32)
2631 EXPORT_SYMBOL(pmu_enable_irled);
2632 EXPORT_SYMBOL(pmu_battery_count);
2633 EXPORT_SYMBOL(pmu_batteries);
2634 EXPORT_SYMBOL(pmu_power_flags);
2635 #endif /* CONFIG_PM_SLEEP && CONFIG_PPC32 */
2636