drivers/macintosh/via-pmu.c

   1 /*
   2  * Device driver for the via-pmu on Apple Powermacs.
   3  *
   4  * The VIA (versatile interface adapter) interfaces to the PMU,
   5  * a 6805 microprocessor core whose primary function is to control
   6  * battery charging and system power on the PowerBook 3400 and 2400.
   7  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   8  * to the keyboard and mouse, as well as the non-volatile RAM
   9  * and the RTC (real time clock) chip.
  10  *
  11  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  12  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  13  * Copyright (C) 2006-2007 Johannes Berg
  14  *
  15  * THIS DRIVER IS BECOMING A TOTAL MESS !
  16  *  - Cleanup atomically disabling reply to PMU events after
  17  *    a sleep or a freq. switch
  18  *
  19  */
  20 #include <stdarg.h>
  21 #include <linux/mutex.h>
  22 #include <linux/types.h>
  23 #include <linux/errno.h>
  24 #include <linux/kernel.h>
  25 #include <linux/delay.h>
  26 #include <linux/sched.h>
  27 #include <linux/miscdevice.h>
  28 #include <linux/blkdev.h>
  29 #include <linux/pci.h>
  30 #include <linux/slab.h>
  31 #include <linux/poll.h>
  32 #include <linux/adb.h>
  33 #include <linux/pmu.h>
  34 #include <linux/cuda.h>
  35 #include <linux/module.h>
  36 #include <linux/spinlock.h>
  37 #include <linux/pm.h>
  38 #include <linux/proc_fs.h>
  39 #include <linux/seq_file.h>
  40 #include <linux/init.h>
  41 #include <linux/interrupt.h>
  42 #include <linux/device.h>
  43 #include <linux/syscore_ops.h>
  44 #include <linux/freezer.h>
  45 #include <linux/syscalls.h>
  46 #include <linux/suspend.h>
  47 #include <linux/cpu.h>
  48 #include <linux/compat.h>
  49 #include <linux/of_address.h>
  50 #include <linux/of_irq.h>
  51 #include <asm/prom.h>
  52 #include <asm/machdep.h>
  53 #include <asm/io.h>
  54 #include <asm/pgtable.h>
  55 #include <asm/sections.h>
  56 #include <asm/irq.h>
  57 #include <asm/pmac_feature.h>
  58 #include <asm/pmac_pfunc.h>
  59 #include <asm/pmac_low_i2c.h>
  60 #include <asm/uaccess.h>
  61 #include <asm/mmu_context.h>
  62 #include <asm/cputable.h>
  63 #include <asm/time.h>
  64 #include <asm/backlight.h>
  65
  66 #include "via-pmu-event.h"
  67
  68 /* Some compile options */
  69 #undef DEBUG_SLEEP
  70
  71 /* Misc minor number allocated for /dev/pmu */
  72 #define PMU_MINOR               154
  73
  74 /* How many iterations between battery polls */
  75 #define BATTERY_POLLING_COUNT   2
  76
  77 static DEFINE_MUTEX(pmu_info_proc_mutex);
  78 static volatile unsigned char __iomem *via;
  79
  80 /* VIA registers - spaced 0x200 bytes apart */
  81 #define RS              0x200           /* skip between registers */
  82 #define B               0               /* B-side data */
  83 #define A               RS              /* A-side data */
  84 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  85 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  86 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  87 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  88 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  89 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  90 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  91 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  92 #define SR              (10*RS)         /* Shift register */
  93 #define ACR             (11*RS)         /* Auxiliary control register */
  94 #define PCR             (12*RS)         /* Peripheral control register */
  95 #define IFR             (13*RS)         /* Interrupt flag register */
  96 #define IER             (14*RS)         /* Interrupt enable register */
  97 #define ANH             (15*RS)         /* A-side data, no handshake */
  98
  99 /* Bits in B data register: both active low */
 100 #define TACK            0x08            /* Transfer acknowledge (input) */
 101 #define TREQ            0x10            /* Transfer request (output) */
 102
 103 /* Bits in ACR */
 104 #define SR_CTRL         0x1c            /* Shift register control bits */
 105 #define SR_EXT          0x0c            /* Shift on external clock */
 106 #define SR_OUT          0x10            /* Shift out if 1 */
 107
 108 /* Bits in IFR and IER */
 109 #define IER_SET         0x80            /* set bits in IER */
 110 #define IER_CLR         0               /* clear bits in IER */
 111 #define SR_INT          0x04            /* Shift register full/empty */
 112 #define CB2_INT         0x08
 113 #define CB1_INT         0x10            /* transition on CB1 input */
 114
 115 static volatile enum pmu_state {
 116         idle,
 117         sending,
 118         intack,
 119         reading,
 120         reading_intr,
 121         locked,
 122 } pmu_state;
 123
 124 static volatile enum int_data_state {
 125         int_data_empty,
 126         int_data_fill,
 127         int_data_ready,
 128         int_data_flush
 129 } int_data_state[2] = { int_data_empty, int_data_empty };
 130
 131 static struct adb_request *current_req;
 132 static struct adb_request *last_req;
 133 static struct adb_request *req_awaiting_reply;
 134 static unsigned char interrupt_data[2][32];
 135 static int interrupt_data_len[2];
 136 static int int_data_last;
 137 static unsigned char *reply_ptr;
 138 static int data_index;
 139 static int data_len;
 140 static volatile int adb_int_pending;
 141 static volatile int disable_poll;
 142 static struct device_node *vias;
 143 static int pmu_kind = PMU_UNKNOWN;
 144 static int pmu_fully_inited;
 145 static int pmu_has_adb;
 146 static struct device_node *gpio_node;
 147 static unsigned char __iomem *gpio_reg;
 148 static int gpio_irq = NO_IRQ;
 149 static int gpio_irq_enabled = -1;
 150 static volatile int pmu_suspended;
 151 static spinlock_t pmu_lock;
 152 static u8 pmu_intr_mask;
 153 static int pmu_version;
 154 static int drop_interrupts;
 155 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 156 static int option_lid_wakeup = 1;
 157 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 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 const struct file_operations pmu_info_proc_fops;
 194 static const struct file_operations pmu_irqstats_proc_fops;
 195 static void pmu_pass_intr(unsigned char *data, int len);
 196 static const struct file_operations pmu_battery_proc_fops;
 197 static const struct file_operations pmu_options_proc_fops;
 198
 199 #ifdef CONFIG_ADB
 200 struct adb_driver via_pmu_driver = {
 201         "PMU",
 202         pmu_probe,
 203         pmu_init,
 204         pmu_send_request,
 205         pmu_adb_autopoll,
 206         pmu_poll_adb,
 207         pmu_adb_reset_bus
 208 };
 209 #endif /* CONFIG_ADB */
 210
 211 extern void low_sleep_handler(void);
 212 extern void enable_kernel_altivec(void);
 213 extern void enable_kernel_fp(void);
 214
 215 #ifdef DEBUG_SLEEP
 216 int pmu_polled_request(struct adb_request *req);
 217 void pmu_blink(int n);
 218 #endif
 219
 220 /*
 221  * This table indicates for each PMU opcode:
 222  * - the number of data bytes to be sent with the command, or -1
 223  *   if a length byte should be sent,
 224  * - the number of response bytes which the PMU will return, or
 225  *   -1 if it will send a length byte.
 226  */
 227 static const s8 pmu_data_len[256][2] = {
 228 /*         0       1       2       3       4       5       6       7  */
 229 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 230 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 231 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 232 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 233 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 234 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 235 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 236 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 237 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 238 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 239 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 240 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 241 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 243 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 245 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 247 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 249 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 250 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 251 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 253 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 255 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 257 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 258 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 259 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261 };
 262
 263 static char *pbook_type[] = {
 264         "Unknown PowerBook",
 265         "PowerBook 2400/3400/3500(G3)",
 266         "PowerBook G3 Series",
 267         "1999 PowerBook G3",
 268         "Core99"
 269 };
 270
 271 int __init find_via_pmu(void)
 272 {
 273         u64 taddr;
 274         const u32 *reg;
 275
 276         if (via != 0)
 277                 return 1;
 278         vias = of_find_node_by_name(NULL, "via-pmu");
 279         if (vias == NULL)
 280                 return 0;
 281
 282         reg = of_get_property(vias, "reg", NULL);
 283         if (reg == NULL) {
 284                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 285                 goto fail;
 286         }
 287         taddr = of_translate_address(vias, reg);
 288         if (taddr == OF_BAD_ADDR) {
 289                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 290                 goto fail;
 291         }
 292
 293         spin_lock_init(&pmu_lock);
 294
 295         pmu_has_adb = 1;
 296
 297         pmu_intr_mask = PMU_INT_PCEJECT |
 298                         PMU_INT_SNDBRT |
 299                         PMU_INT_ADB |
 300                         PMU_INT_TICK;
 301
 302         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 303             || of_device_is_compatible(vias->parent, "ohare")))
 304                 pmu_kind = PMU_OHARE_BASED;
 305         else if (of_device_is_compatible(vias->parent, "paddington"))
 306                 pmu_kind = PMU_PADDINGTON_BASED;
 307         else if (of_device_is_compatible(vias->parent, "heathrow"))
 308                 pmu_kind = PMU_HEATHROW_BASED;
 309         else if (of_device_is_compatible(vias->parent, "Keylargo")
 310                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 311                 struct device_node *gpiop;
 312                 struct device_node *adbp;
 313                 u64 gaddr = OF_BAD_ADDR;
 314
 315                 pmu_kind = PMU_KEYLARGO_BASED;
 316                 adbp = of_find_node_by_type(NULL, "adb");
 317                 pmu_has_adb = (adbp != NULL);
 318                 of_node_put(adbp);
 319                 pmu_intr_mask = PMU_INT_PCEJECT |
 320                                 PMU_INT_SNDBRT |
 321                                 PMU_INT_ADB |
 322                                 PMU_INT_TICK |
 323                                 PMU_INT_ENVIRONMENT;
 324
 325                 gpiop = of_find_node_by_name(NULL, "gpio");
 326                 if (gpiop) {
 327                         reg = of_get_property(gpiop, "reg", NULL);
 328                         if (reg)
 329                                 gaddr = of_translate_address(gpiop, reg);
 330                         if (gaddr != OF_BAD_ADDR)
 331                                 gpio_reg = ioremap(gaddr, 0x10);
 332                 }
 333                 if (gpio_reg == NULL) {
 334                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 335                         goto fail;
 336                 }
 337         } else
 338                 pmu_kind = PMU_UNKNOWN;
 339
 340         via = ioremap(taddr, 0x2000);
 341         if (via == NULL) {
 342                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 343                 goto fail_via_remap;
 344         }
 345
 346         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 347         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 348
 349         pmu_state = idle;
 350
 351         if (!init_pmu())
 352                 goto fail_init;
 353
 354         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 355                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 356
 357         sys_ctrler = SYS_CTRLER_PMU;
 358
 359         return 1;
 360
 361  fail_init:
 362         iounmap(via);
 363         via = NULL;
 364  fail_via_remap:
 365         iounmap(gpio_reg);
 366         gpio_reg = NULL;
 367  fail:
 368         of_node_put(vias);
 369         vias = NULL;
 370         return 0;
 371 }
 372
 373 #ifdef CONFIG_ADB
 374 static int pmu_probe(void)
 375 {
 376         return vias == NULL? -ENODEV: 0;
 377 }
 378
 379 static int __init pmu_init(void)
 380 {
 381         if (vias == NULL)
 382                 return -ENODEV;
 383         return 0;
 384 }
 385 #endif /* CONFIG_ADB */
 386
 387 /*
 388  * We can't wait until pmu_init gets called, that happens too late.
 389  * It happens after IDE and SCSI initialization, which can take a few
 390  * seconds, and by that time the PMU could have given up on us and
 391  * turned us off.
 392  * Thus this is called with arch_initcall rather than device_initcall.
 393  */
 394 static int __init via_pmu_start(void)
 395 {
 396         unsigned int irq;
 397
 398         if (vias == NULL)
 399                 return -ENODEV;
 400
 401         batt_req.complete = 1;
 402
 403         irq = irq_of_parse_and_map(vias, 0);
 404         if (irq == NO_IRQ) {
 405                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 406                 return -ENODEV;
 407         }
 408         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 409          * to be disabled between the 2 passes of driver suspend, we
 410          * control our own disabling for that one
 411          */
 412         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 413                         "VIA-PMU", (void *)0)) {
 414                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 415                 return -ENODEV;
 416         }
 417
 418         if (pmu_kind == PMU_KEYLARGO_BASED) {
 419                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 420                 if (gpio_node == NULL)
 421                         gpio_node = of_find_node_by_name(NULL,
 422                                                          "pmu-interrupt");
 423                 if (gpio_node)
 424                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 425
 426                 if (gpio_irq != NO_IRQ) {
 427                         if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
 428                                         "GPIO1 ADB", (void *)0))
 429                                 printk(KERN_ERR "pmu: can't get irq %d"
 430                                        " (GPIO1)\n", gpio_irq);
 431                         else
 432                                 gpio_irq_enabled = 1;
 433                 }
 434         }
 435
 436         /* Enable interrupts */
 437         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 438
 439         pmu_fully_inited = 1;
 440
 441         /* Make sure PMU settle down before continuing. This is _very_ important
 442          * since the IDE probe may shut interrupts down for quite a bit of time. If
 443          * a PMU communication is pending while this happens, the PMU may timeout
 444          * Not that on Core99 machines, the PMU keeps sending us environement
 445          * messages, we should find a way to either fix IDE or make it call
 446          * pmu_suspend() before masking interrupts. This can also happens while
 447          * scolling with some fbdevs.
 448          */
 449         do {
 450                 pmu_poll();
 451         } while (pmu_state != idle);
 452
 453         return 0;
 454 }
 455
 456 arch_initcall(via_pmu_start);
 457
 458 /*
 459  * This has to be done after pci_init, which is a subsys_initcall.
 460  */
 461 static int __init via_pmu_dev_init(void)
 462 {
 463         if (vias == NULL)
 464                 return -ENODEV;
 465
 466 #ifdef CONFIG_PMAC_BACKLIGHT
 467         /* Initialize backlight */
 468         pmu_backlight_init();
 469 #endif
 470
 471 #ifdef CONFIG_PPC32
 472         if (of_machine_is_compatible("AAPL,3400/2400") ||
 473                 of_machine_is_compatible("AAPL,3500")) {
 474                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 475                         NULL, PMAC_MB_INFO_MODEL, 0);
 476                 pmu_battery_count = 1;
 477                 if (mb == PMAC_TYPE_COMET)
 478                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 479                 else
 480                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 481         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 482                 of_machine_is_compatible("PowerBook1,1")) {
 483                 pmu_battery_count = 2;
 484                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 485                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 486         } else {
 487                 struct device_node* prim =
 488                         of_find_node_by_name(NULL, "power-mgt");
 489                 const u32 *prim_info = NULL;
 490                 if (prim)
 491                         prim_info = of_get_property(prim, "prim-info", NULL);
 492                 if (prim_info) {
 493                         /* Other stuffs here yet unknown */
 494                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 495                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 496                         if (pmu_battery_count > 1)
 497                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 498                 }
 499                 of_node_put(prim);
 500         }
 501 #endif /* CONFIG_PPC32 */
 502
 503         /* Create /proc/pmu */
 504         proc_pmu_root = proc_mkdir("pmu", NULL);
 505         if (proc_pmu_root) {
 506                 long i;
 507
 508                 for (i=0; i<pmu_battery_count; i++) {
 509                         char title[16];
 510                         sprintf(title, "battery_%ld", i);
 511                         proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 512                                         &pmu_battery_proc_fops, (void *)i);
 513                 }
 514
 515                 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 516                 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 517                                                 &pmu_irqstats_proc_fops);
 518                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 519                                                 &pmu_options_proc_fops);
 520         }
 521         return 0;
 522 }
 523
 524 device_initcall(via_pmu_dev_init);
 525
 526 static int
 527 init_pmu(void)
 528 {
 529         int timeout;
 530         struct adb_request req;
 531
 532         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 533         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 534
 535         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 536         timeout =  100000;
 537         while (!req.complete) {
 538                 if (--timeout < 0) {
 539                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 540                         return 0;
 541                 }
 542                 udelay(10);
 543                 pmu_poll();
 544         }
 545
 546         /* ack all pending interrupts */
 547         timeout = 100000;
 548         interrupt_data[0][0] = 1;
 549         while (interrupt_data[0][0] || pmu_state != idle) {
 550                 if (--timeout < 0) {
 551                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 552                         return 0;
 553                 }
 554                 if (pmu_state == idle)
 555                         adb_int_pending = 1;
 556                 via_pmu_interrupt(0, NULL);
 557                 udelay(10);
 558         }
 559
 560         /* Tell PMU we are ready.  */
 561         if (pmu_kind == PMU_KEYLARGO_BASED) {
 562                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 563                 while (!req.complete)
 564                         pmu_poll();
 565         }
 566
 567         /* Read PMU version */
 568         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 569         pmu_wait_complete(&req);
 570         if (req.reply_len > 0)
 571                 pmu_version = req.reply[0];
 572
 573         /* Read server mode setting */
 574         if (pmu_kind == PMU_KEYLARGO_BASED) {
 575                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 576                             PMU_PWR_GET_POWERUP_EVENTS);
 577                 pmu_wait_complete(&req);
 578                 if (req.reply_len == 2) {
 579                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 580                                 option_server_mode = 1;
 581                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 582                                option_server_mode ? "enabled" : "disabled");
 583                 }
 584         }
 585         return 1;
 586 }
 587
 588 int
 589 pmu_get_model(void)
 590 {
 591         return pmu_kind;
 592 }
 593
 594 static void pmu_set_server_mode(int server_mode)
 595 {
 596         struct adb_request req;
 597
 598         if (pmu_kind != PMU_KEYLARGO_BASED)
 599                 return;
 600
 601         option_server_mode = server_mode;
 602         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 603         pmu_wait_complete(&req);
 604         if (req.reply_len < 2)
 605                 return;
 606         if (server_mode)
 607                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 608                             PMU_PWR_SET_POWERUP_EVENTS,
 609                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 610         else
 611                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 612                             PMU_PWR_CLR_POWERUP_EVENTS,
 613                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 614         pmu_wait_complete(&req);
 615 }
 616
 617 /* This new version of the code for 2400/3400/3500 powerbooks
 618  * is inspired from the implementation in gkrellm-pmu
 619  */
 620 static void
 621 done_battery_state_ohare(struct adb_request* req)
 622 {
 623         /* format:
 624          *  [0]    :  flags
 625          *    0x01 :  AC indicator
 626          *    0x02 :  charging
 627          *    0x04 :  battery exist
 628          *    0x08 :
 629          *    0x10 :
 630          *    0x20 :  full charged
 631          *    0x40 :  pcharge reset
 632          *    0x80 :  battery exist
 633          *
 634          *  [1][2] :  battery voltage
 635          *  [3]    :  CPU temperature
 636          *  [4]    :  battery temperature
 637          *  [5]    :  current
 638          *  [6][7] :  pcharge
 639          *              --tkoba
 640          */
 641         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 642         long pcharge, charge, vb, vmax, lmax;
 643         long vmax_charging, vmax_charged;
 644         long amperage, voltage, time, max;
 645         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 646                         NULL, PMAC_MB_INFO_MODEL, 0);
 647
 648         if (req->reply[0] & 0x01)
 649                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 650         else
 651                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 652
 653         if (mb == PMAC_TYPE_COMET) {
 654                 vmax_charged = 189;
 655                 vmax_charging = 213;
 656                 lmax = 6500;
 657         } else {
 658                 vmax_charged = 330;
 659                 vmax_charging = 330;
 660                 lmax = 6500;
 661         }
 662         vmax = vmax_charged;
 663
 664         /* If battery installed */
 665         if (req->reply[0] & 0x04) {
 666                 bat_flags |= PMU_BATT_PRESENT;
 667                 if (req->reply[0] & 0x02)
 668                         bat_flags |= PMU_BATT_CHARGING;
 669                 vb = (req->reply[1] << 8) | req->reply[2];
 670                 voltage = (vb * 265 + 72665) / 10;
 671                 amperage = req->reply[5];
 672                 if ((req->reply[0] & 0x01) == 0) {
 673                         if (amperage > 200)
 674                                 vb += ((amperage - 200) * 15)/100;
 675                 } else if (req->reply[0] & 0x02) {
 676                         vb = (vb * 97) / 100;
 677                         vmax = vmax_charging;
 678                 }
 679                 charge = (100 * vb) / vmax;
 680                 if (req->reply[0] & 0x40) {
 681                         pcharge = (req->reply[6] << 8) + req->reply[7];
 682                         if (pcharge > lmax)
 683                                 pcharge = lmax;
 684                         pcharge *= 100;
 685                         pcharge = 100 - pcharge / lmax;
 686                         if (pcharge < charge)
 687                                 charge = pcharge;
 688                 }
 689                 if (amperage > 0)
 690                         time = (charge * 16440) / amperage;
 691                 else
 692                         time = 0;
 693                 max = 100;
 694                 amperage = -amperage;
 695         } else
 696                 charge = max = amperage = voltage = time = 0;
 697
 698         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 699         pmu_batteries[pmu_cur_battery].charge = charge;
 700         pmu_batteries[pmu_cur_battery].max_charge = max;
 701         pmu_batteries[pmu_cur_battery].amperage = amperage;
 702         pmu_batteries[pmu_cur_battery].voltage = voltage;
 703         pmu_batteries[pmu_cur_battery].time_remaining = time;
 704
 705         clear_bit(0, &async_req_locks);
 706 }
 707
 708 static void
 709 done_battery_state_smart(struct adb_request* req)
 710 {
 711         /* format:
 712          *  [0] : format of this structure (known: 3,4,5)
 713          *  [1] : flags
 714          *
 715          *  format 3 & 4:
 716          *
 717          *  [2] : charge
 718          *  [3] : max charge
 719          *  [4] : current
 720          *  [5] : voltage
 721          *
 722          *  format 5:
 723          *
 724          *  [2][3] : charge
 725          *  [4][5] : max charge
 726          *  [6][7] : current
 727          *  [8][9] : voltage
 728          */
 729
 730         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 731         int amperage;
 732         unsigned int capa, max, voltage;
 733
 734         if (req->reply[1] & 0x01)
 735                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 736         else
 737                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 738
 739
 740         capa = max = amperage = voltage = 0;
 741
 742         if (req->reply[1] & 0x04) {
 743                 bat_flags |= PMU_BATT_PRESENT;
 744                 switch(req->reply[0]) {
 745                         case 3:
 746                         case 4: capa = req->reply[2];
 747                                 max = req->reply[3];
 748                                 amperage = *((signed char *)&req->reply[4]);
 749                                 voltage = req->reply[5];
 750                                 break;
 751                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 752                                 max = (req->reply[4] << 8) | req->reply[5];
 753                                 amperage = *((signed short *)&req->reply[6]);
 754                                 voltage = (req->reply[8] << 8) | req->reply[9];
 755                                 break;
 756                         default:
 757                                 pr_warn("pmu.c: unrecognized battery info, "
 758                                         "len: %d, %4ph\n", req->reply_len,
 759                                                            req->reply);
 760                                 break;
 761                 }
 762         }
 763
 764         if ((req->reply[1] & 0x01) && (amperage > 0))
 765                 bat_flags |= PMU_BATT_CHARGING;
 766
 767         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 768         pmu_batteries[pmu_cur_battery].charge = capa;
 769         pmu_batteries[pmu_cur_battery].max_charge = max;
 770         pmu_batteries[pmu_cur_battery].amperage = amperage;
 771         pmu_batteries[pmu_cur_battery].voltage = voltage;
 772         if (amperage) {
 773                 if ((req->reply[1] & 0x01) && (amperage > 0))
 774                         pmu_batteries[pmu_cur_battery].time_remaining
 775                                 = ((max-capa) * 3600) / amperage;
 776                 else
 777                         pmu_batteries[pmu_cur_battery].time_remaining
 778                                 = (capa * 3600) / (-amperage);
 779         } else
 780                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 781
 782         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 783
 784         clear_bit(0, &async_req_locks);
 785 }
 786
 787 static void
 788 query_battery_state(void)
 789 {
 790         if (test_and_set_bit(0, &async_req_locks))
 791                 return;
 792         if (pmu_kind == PMU_OHARE_BASED)
 793                 pmu_request(&batt_req, done_battery_state_ohare,
 794                         1, PMU_BATTERY_STATE);
 795         else
 796                 pmu_request(&batt_req, done_battery_state_smart,
 797                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 798 }
 799
 800 static int pmu_info_proc_show(struct seq_file *m, void *v)
 801 {
 802         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 803         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 804         seq_printf(m, "AC Power               : %d\n",
 805                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 806         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 807
 808         return 0;
 809 }
 810
 811 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 812 {
 813         return single_open(file, pmu_info_proc_show, NULL);
 814 }
 815
 816 static const struct file_operations pmu_info_proc_fops = {
 817         .owner          = THIS_MODULE,
 818         .open           = pmu_info_proc_open,
 819         .read           = seq_read,
 820         .llseek         = seq_lseek,
 821         .release        = single_release,
 822 };
 823
 824 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 825 {
 826         int i;
 827         static const char *irq_names[] = {
 828                 "Total CB1 triggered events",
 829                 "Total GPIO1 triggered events",
 830                 "PC-Card eject button",
 831                 "Sound/Brightness button",
 832                 "ADB message",
 833                 "Battery state change",
 834                 "Environment interrupt",
 835                 "Tick timer",
 836                 "Ghost interrupt (zero len)",
 837                 "Empty interrupt (empty mask)",
 838                 "Max irqs in a row"
 839         };
 840
 841         for (i=0; i<11; i++) {
 842                 seq_printf(m, " %2u: %10u (%s)\n",
 843                              i, pmu_irq_stats[i], irq_names[i]);
 844         }
 845         return 0;
 846 }
 847
 848 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 849 {
 850         return single_open(file, pmu_irqstats_proc_show, NULL);
 851 }
 852
 853 static const struct file_operations pmu_irqstats_proc_fops = {
 854         .owner          = THIS_MODULE,
 855         .open           = pmu_irqstats_proc_open,
 856         .read           = seq_read,
 857         .llseek         = seq_lseek,
 858         .release        = single_release,
 859 };
 860
 861 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 862 {
 863         long batnum = (long)m->private;
 864
 865         seq_putc(m, '\n');
 866         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 867         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 868         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 869         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 870         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 871         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 872         return 0;
 873 }
 874
 875 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 876 {
 877         return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
 878 }
 879
 880 static const struct file_operations pmu_battery_proc_fops = {
 881         .owner          = THIS_MODULE,
 882         .open           = pmu_battery_proc_open,
 883         .read           = seq_read,
 884         .llseek         = seq_lseek,
 885         .release        = single_release,
 886 };
 887
 888 static int pmu_options_proc_show(struct seq_file *m, void *v)
 889 {
 890 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 891         if (pmu_kind == PMU_KEYLARGO_BASED &&
 892             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 893                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 894 #endif
 895         if (pmu_kind == PMU_KEYLARGO_BASED)
 896                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 897
 898         return 0;
 899 }
 900
 901 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 902 {
 903         return single_open(file, pmu_options_proc_show, NULL);
 904 }
 905
 906 static ssize_t pmu_options_proc_write(struct file *file,
 907                 const char __user *buffer, size_t count, loff_t *pos)
 908 {
 909         char tmp[33];
 910         char *label, *val;
 911         size_t fcount = count;
 912
 913         if (!count)
 914                 return -EINVAL;
 915         if (count > 32)
 916                 count = 32;
 917         if (copy_from_user(tmp, buffer, count))
 918                 return -EFAULT;
 919         tmp[count] = 0;
 920
 921         label = tmp;
 922         while(*label == ' ')
 923                 label++;
 924         val = label;
 925         while(*val && (*val != '=')) {
 926                 if (*val == ' ')
 927                         *val = 0;
 928                 val++;
 929         }
 930         if ((*val) == 0)
 931                 return -EINVAL;
 932         *(val++) = 0;
 933         while(*val == ' ')
 934                 val++;
 935 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 936         if (pmu_kind == PMU_KEYLARGO_BASED &&
 937             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 938                 if (!strcmp(label, "lid_wakeup"))
 939                         option_lid_wakeup = ((*val) == '1');
 940 #endif
 941         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 942                 int new_value;
 943                 new_value = ((*val) == '1');
 944                 if (new_value != option_server_mode)
 945                         pmu_set_server_mode(new_value);
 946         }
 947         return fcount;
 948 }
 949
 950 static const struct file_operations pmu_options_proc_fops = {
 951         .owner          = THIS_MODULE,
 952         .open           = pmu_options_proc_open,
 953         .read           = seq_read,
 954         .llseek         = seq_lseek,
 955         .release        = single_release,
 956         .write          = pmu_options_proc_write,
 957 };
 958
 959 #ifdef CONFIG_ADB
 960 /* Send an ADB command */
 961 static int pmu_send_request(struct adb_request *req, int sync)
 962 {
 963         int i, ret;
 964
 965         if ((vias == NULL) || (!pmu_fully_inited)) {
 966                 req->complete = 1;
 967                 return -ENXIO;
 968         }
 969
 970         ret = -EINVAL;
 971
 972         switch (req->data[0]) {
 973         case PMU_PACKET:
 974                 for (i = 0; i < req->nbytes - 1; ++i)
 975                         req->data[i] = req->data[i+1];
 976                 --req->nbytes;
 977                 if (pmu_data_len[req->data[0]][1] != 0) {
 978                         req->reply[0] = ADB_RET_OK;
 979                         req->reply_len = 1;
 980                 } else
 981                         req->reply_len = 0;
 982                 ret = pmu_queue_request(req);
 983                 break;
 984         case CUDA_PACKET:
 985                 switch (req->data[1]) {
 986                 case CUDA_GET_TIME:
 987                         if (req->nbytes != 2)
 988                                 break;
 989                         req->data[0] = PMU_READ_RTC;
 990                         req->nbytes = 1;
 991                         req->reply_len = 3;
 992                         req->reply[0] = CUDA_PACKET;
 993                         req->reply[1] = 0;
 994                         req->reply[2] = CUDA_GET_TIME;
 995                         ret = pmu_queue_request(req);
 996                         break;
 997                 case CUDA_SET_TIME:
 998                         if (req->nbytes != 6)
 999                                 break;
1000                         req->data[0] = PMU_SET_RTC;
1001                         req->nbytes = 5;
1002                         for (i = 1; i <= 4; ++i)
1003                                 req->data[i] = req->data[i+1];
1004                         req->reply_len = 3;
1005                         req->reply[0] = CUDA_PACKET;
1006                         req->reply[1] = 0;
1007                         req->reply[2] = CUDA_SET_TIME;
1008                         ret = pmu_queue_request(req);
1009                         break;
1010                 }
1011                 break;
1012         case ADB_PACKET:
1013                 if (!pmu_has_adb)
1014                         return -ENXIO;
1015                 for (i = req->nbytes - 1; i > 1; --i)
1016                         req->data[i+2] = req->data[i];
1017                 req->data[3] = req->nbytes - 2;
1018                 req->data[2] = pmu_adb_flags;
1019                 /*req->data[1] = req->data[1];*/
1020                 req->data[0] = PMU_ADB_CMD;
1021                 req->nbytes += 2;
1022                 req->reply_expected = 1;
1023                 req->reply_len = 0;
1024                 ret = pmu_queue_request(req);
1025                 break;
1026         }
1027         if (ret) {
1028                 req->complete = 1;
1029                 return ret;
1030         }
1031
1032         if (sync)
1033                 while (!req->complete)
1034                         pmu_poll();
1035
1036         return 0;
1037 }
1038
1039 /* Enable/disable autopolling */
1040 static int __pmu_adb_autopoll(int devs)
1041 {
1042         struct adb_request req;
1043
1044         if (devs) {
1045                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1046                             adb_dev_map >> 8, adb_dev_map);
1047                 pmu_adb_flags = 2;
1048         } else {
1049                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1050                 pmu_adb_flags = 0;
1051         }
1052         while (!req.complete)
1053                 pmu_poll();
1054         return 0;
1055 }
1056
1057 static int pmu_adb_autopoll(int devs)
1058 {
1059         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1060                 return -ENXIO;
1061
1062         adb_dev_map = devs;
1063         return __pmu_adb_autopoll(devs);
1064 }
1065
1066 /* Reset the ADB bus */
1067 static int pmu_adb_reset_bus(void)
1068 {
1069         struct adb_request req;
1070         int save_autopoll = adb_dev_map;
1071
1072         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1073                 return -ENXIO;
1074
1075         /* anyone got a better idea?? */
1076         __pmu_adb_autopoll(0);
1077
1078         req.nbytes = 4;
1079         req.done = NULL;
1080         req.data[0] = PMU_ADB_CMD;
1081         req.data[1] = ADB_BUSRESET;
1082         req.data[2] = 0;
1083         req.data[3] = 0;
1084         req.data[4] = 0;
1085         req.reply_len = 0;
1086         req.reply_expected = 1;
1087         if (pmu_queue_request(&req) != 0) {
1088                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1089                 return -EIO;
1090         }
1091         pmu_wait_complete(&req);
1092
1093         if (save_autopoll != 0)
1094                 __pmu_adb_autopoll(save_autopoll);
1095
1096         return 0;
1097 }
1098 #endif /* CONFIG_ADB */
1099
1100 /* Construct and send a pmu request */
1101 int
1102 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1103             int nbytes, ...)
1104 {
1105         va_list list;
1106         int i;
1107
1108         if (vias == NULL)
1109                 return -ENXIO;
1110
1111         if (nbytes < 0 || nbytes > 32) {
1112                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1113                 req->complete = 1;
1114                 return -EINVAL;
1115         }
1116         req->nbytes = nbytes;
1117         req->done = done;
1118         va_start(list, nbytes);
1119         for (i = 0; i < nbytes; ++i)
1120                 req->data[i] = va_arg(list, int);
1121         va_end(list);
1122         req->reply_len = 0;
1123         req->reply_expected = 0;
1124         return pmu_queue_request(req);
1125 }
1126
1127 int
1128 pmu_queue_request(struct adb_request *req)
1129 {
1130         unsigned long flags;
1131         int nsend;
1132
1133         if (via == NULL) {
1134                 req->complete = 1;
1135                 return -ENXIO;
1136         }
1137         if (req->nbytes <= 0) {
1138                 req->complete = 1;
1139                 return 0;
1140         }
1141         nsend = pmu_data_len[req->data[0]][0];
1142         if (nsend >= 0 && req->nbytes != nsend + 1) {
1143                 req->complete = 1;
1144                 return -EINVAL;
1145         }
1146
1147         req->next = NULL;
1148         req->sent = 0;
1149         req->complete = 0;
1150
1151         spin_lock_irqsave(&pmu_lock, flags);
1152         if (current_req != 0) {
1153                 last_req->next = req;
1154                 last_req = req;
1155         } else {
1156                 current_req = req;
1157                 last_req = req;
1158                 if (pmu_state == idle)
1159                         pmu_start();
1160         }
1161         spin_unlock_irqrestore(&pmu_lock, flags);
1162
1163         return 0;
1164 }
1165
1166 static inline void
1167 wait_for_ack(void)
1168 {
1169         /* Sightly increased the delay, I had one occurrence of the message
1170          * reported
1171          */
1172         int timeout = 4000;
1173         while ((in_8(&via[B]) & TACK) == 0) {
1174                 if (--timeout < 0) {
1175                         printk(KERN_ERR "PMU not responding (!ack)\n");
1176                         return;
1177                 }
1178                 udelay(10);
1179         }
1180 }
1181
1182 /* New PMU seems to be very sensitive to those timings, so we make sure
1183  * PCI is flushed immediately */
1184 static inline void
1185 send_byte(int x)
1186 {
1187         volatile unsigned char __iomem *v = via;
1188
1189         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1190         out_8(&v[SR], x);
1191         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1192         (void)in_8(&v[B]);
1193 }
1194
1195 static inline void
1196 recv_byte(void)
1197 {
1198         volatile unsigned char __iomem *v = via;
1199
1200         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1201         in_8(&v[SR]);           /* resets SR */
1202         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1203         (void)in_8(&v[B]);
1204 }
1205
1206 static inline void
1207 pmu_done(struct adb_request *req)
1208 {
1209         void (*done)(struct adb_request *) = req->done;
1210         mb();
1211         req->complete = 1;
1212         /* Here, we assume that if the request has a done member, the
1213          * struct request will survive to setting req->complete to 1
1214          */
1215         if (done)
1216                 (*done)(req);
1217 }
1218
1219 static void
1220 pmu_start(void)
1221 {
1222         struct adb_request *req;
1223
1224         /* assert pmu_state == idle */
1225         /* get the packet to send */
1226         req = current_req;
1227         if (req == 0 || pmu_state != idle
1228             || (/*req->reply_expected && */req_awaiting_reply))
1229                 return;
1230
1231         pmu_state = sending;
1232         data_index = 1;
1233         data_len = pmu_data_len[req->data[0]][0];
1234
1235         /* Sounds safer to make sure ACK is high before writing. This helped
1236          * kill a problem with ADB and some iBooks
1237          */
1238         wait_for_ack();
1239         /* set the shift register to shift out and send a byte */
1240         send_byte(req->data[0]);
1241 }
1242
1243 void
1244 pmu_poll(void)
1245 {
1246         if (!via)
1247                 return;
1248         if (disable_poll)
1249                 return;
1250         via_pmu_interrupt(0, NULL);
1251 }
1252
1253 void
1254 pmu_poll_adb(void)
1255 {
1256         if (!via)
1257                 return;
1258         if (disable_poll)
1259                 return;
1260         /* Kicks ADB read when PMU is suspended */
1261         adb_int_pending = 1;
1262         do {
1263                 via_pmu_interrupt(0, NULL);
1264         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1265                 || req_awaiting_reply));
1266 }
1267
1268 void
1269 pmu_wait_complete(struct adb_request *req)
1270 {
1271         if (!via)
1272                 return;
1273         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1274                 via_pmu_interrupt(0, NULL);
1275 }
1276
1277 /* This function loops until the PMU is idle and prevents it from
1278  * anwsering to ADB interrupts. pmu_request can still be called.
1279  * This is done to avoid spurrious shutdowns when we know we'll have
1280  * interrupts switched off for a long time
1281  */
1282 void
1283 pmu_suspend(void)
1284 {
1285         unsigned long flags;
1286
1287         if (!via)
1288                 return;
1289
1290         spin_lock_irqsave(&pmu_lock, flags);
1291         pmu_suspended++;
1292         if (pmu_suspended > 1) {
1293                 spin_unlock_irqrestore(&pmu_lock, flags);
1294                 return;
1295         }
1296
1297         do {
1298                 spin_unlock_irqrestore(&pmu_lock, flags);
1299                 if (req_awaiting_reply)
1300                         adb_int_pending = 1;
1301                 via_pmu_interrupt(0, NULL);
1302                 spin_lock_irqsave(&pmu_lock, flags);
1303                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1304                         if (gpio_irq >= 0)
1305                                 disable_irq_nosync(gpio_irq);
1306                         out_8(&via[IER], CB1_INT | IER_CLR);
1307                         spin_unlock_irqrestore(&pmu_lock, flags);
1308                         break;
1309                 }
1310         } while (1);
1311 }
1312
1313 void
1314 pmu_resume(void)
1315 {
1316         unsigned long flags;
1317
1318         if (!via || (pmu_suspended < 1))
1319                 return;
1320
1321         spin_lock_irqsave(&pmu_lock, flags);
1322         pmu_suspended--;
1323         if (pmu_suspended > 0) {
1324                 spin_unlock_irqrestore(&pmu_lock, flags);
1325                 return;
1326         }
1327         adb_int_pending = 1;
1328         if (gpio_irq >= 0)
1329                 enable_irq(gpio_irq);
1330         out_8(&via[IER], CB1_INT | IER_SET);
1331         spin_unlock_irqrestore(&pmu_lock, flags);
1332         pmu_poll();
1333 }
1334
1335 /* Interrupt data could be the result data from an ADB cmd */
1336 static void
1337 pmu_handle_data(unsigned char *data, int len)
1338 {
1339         unsigned char ints, pirq;
1340         int i = 0;
1341
1342         asleep = 0;
1343         if (drop_interrupts || len < 1) {
1344                 adb_int_pending = 0;
1345                 pmu_irq_stats[8]++;
1346                 return;
1347         }
1348
1349         /* Get PMU interrupt mask */
1350         ints = data[0];
1351
1352         /* Record zero interrupts for stats */
1353         if (ints == 0)
1354                 pmu_irq_stats[9]++;
1355
1356         /* Hack to deal with ADB autopoll flag */
1357         if (ints & PMU_INT_ADB)
1358                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1359
1360 next:
1361
1362         if (ints == 0) {
1363                 if (i > pmu_irq_stats[10])
1364                         pmu_irq_stats[10] = i;
1365                 return;
1366         }
1367
1368         for (pirq = 0; pirq < 8; pirq++)
1369                 if (ints & (1 << pirq))
1370                         break;
1371         pmu_irq_stats[pirq]++;
1372         i++;
1373         ints &= ~(1 << pirq);
1374
1375         /* Note: for some reason, we get an interrupt with len=1,
1376          * data[0]==0 after each normal ADB interrupt, at least
1377          * on the Pismo. Still investigating...  --BenH
1378          */
1379         if ((1 << pirq) & PMU_INT_ADB) {
1380                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1381                         struct adb_request *req = req_awaiting_reply;
1382                         if (req == 0) {
1383                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1384                                 return;
1385                         }
1386                         req_awaiting_reply = NULL;
1387                         if (len <= 2)
1388                                 req->reply_len = 0;
1389                         else {
1390                                 memcpy(req->reply, data + 1, len - 1);
1391                                 req->reply_len = len - 1;
1392                         }
1393                         pmu_done(req);
1394                 } else {
1395                         if (len == 4 && data[1] == 0x2c) {
1396                                 extern int xmon_wants_key, xmon_adb_keycode;
1397                                 if (xmon_wants_key) {
1398                                         xmon_adb_keycode = data[2];
1399                                         return;
1400                                 }
1401                         }
1402 #ifdef CONFIG_ADB
1403                         /*
1404                          * XXX On the [23]400 the PMU gives us an up
1405                          * event for keycodes 0x74 or 0x75 when the PC
1406                          * card eject buttons are released, so we
1407                          * ignore those events.
1408                          */
1409                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1410                               && data[1] == 0x2c && data[3] == 0xff
1411                               && (data[2] & ~1) == 0xf4))
1412                                 adb_input(data+1, len-1, 1);
1413 #endif /* CONFIG_ADB */
1414                 }
1415         }
1416         /* Sound/brightness button pressed */
1417         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1418 #ifdef CONFIG_PMAC_BACKLIGHT
1419                 if (len == 3)
1420                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1421 #endif
1422         }
1423         /* Tick interrupt */
1424         else if ((1 << pirq) & PMU_INT_TICK) {
1425                 /* Environement or tick interrupt, query batteries */
1426                 if (pmu_battery_count) {
1427                         if ((--query_batt_timer) == 0) {
1428                                 query_battery_state();
1429                                 query_batt_timer = BATTERY_POLLING_COUNT;
1430                         }
1431                 }
1432         }
1433         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1434                 if (pmu_battery_count)
1435                         query_battery_state();
1436                 pmu_pass_intr(data, len);
1437                 /* len == 6 is probably a bad check. But how do I
1438                  * know what PMU versions send what events here? */
1439                 if (len == 6) {
1440                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1441                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1442                 }
1443         } else {
1444                pmu_pass_intr(data, len);
1445         }
1446         goto next;
1447 }
1448
1449 static struct adb_request*
1450 pmu_sr_intr(void)
1451 {
1452         struct adb_request *req;
1453         int bite = 0;
1454
1455         if (via[B] & TREQ) {
1456                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1457                 out_8(&via[IFR], SR_INT);
1458                 return NULL;
1459         }
1460         /* The ack may not yet be low when we get the interrupt */
1461         while ((in_8(&via[B]) & TACK) != 0)
1462                         ;
1463
1464         /* if reading grab the byte, and reset the interrupt */
1465         if (pmu_state == reading || pmu_state == reading_intr)
1466                 bite = in_8(&via[SR]);
1467
1468         /* reset TREQ and wait for TACK to go high */
1469         out_8(&via[B], in_8(&via[B]) | TREQ);
1470         wait_for_ack();
1471
1472         switch (pmu_state) {
1473         case sending:
1474                 req = current_req;
1475                 if (data_len < 0) {
1476                         data_len = req->nbytes - 1;
1477                         send_byte(data_len);
1478                         break;
1479                 }
1480                 if (data_index <= data_len) {
1481                         send_byte(req->data[data_index++]);
1482                         break;
1483                 }
1484                 req->sent = 1;
1485                 data_len = pmu_data_len[req->data[0]][1];
1486                 if (data_len == 0) {
1487                         pmu_state = idle;
1488                         current_req = req->next;
1489                         if (req->reply_expected)
1490                                 req_awaiting_reply = req;
1491                         else
1492                                 return req;
1493                 } else {
1494                         pmu_state = reading;
1495                         data_index = 0;
1496                         reply_ptr = req->reply + req->reply_len;
1497                         recv_byte();
1498                 }
1499                 break;
1500
1501         case intack:
1502                 data_index = 0;
1503                 data_len = -1;
1504                 pmu_state = reading_intr;
1505                 reply_ptr = interrupt_data[int_data_last];
1506                 recv_byte();
1507                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1508                         enable_irq(gpio_irq);
1509                         gpio_irq_enabled = 1;
1510                 }
1511                 break;
1512
1513         case reading:
1514         case reading_intr:
1515                 if (data_len == -1) {
1516                         data_len = bite;
1517                         if (bite > 32)
1518                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1519                 } else if (data_index < 32) {
1520                         reply_ptr[data_index++] = bite;
1521                 }
1522                 if (data_index < data_len) {
1523                         recv_byte();
1524                         break;
1525                 }
1526
1527                 if (pmu_state == reading_intr) {
1528                         pmu_state = idle;
1529                         int_data_state[int_data_last] = int_data_ready;
1530                         interrupt_data_len[int_data_last] = data_len;
1531                 } else {
1532                         req = current_req;
1533                         /*
1534                          * For PMU sleep and freq change requests, we lock the
1535                          * PMU until it's explicitly unlocked. This avoids any
1536                          * spurrious event polling getting in
1537                          */
1538                         current_req = req->next;
1539                         req->reply_len += data_index;
1540                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1541                                 pmu_state = locked;
1542                         else
1543                                 pmu_state = idle;
1544                         return req;
1545                 }
1546                 break;
1547
1548         default:
1549                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1550                        pmu_state);
1551         }
1552         return NULL;
1553 }
1554
1555 static irqreturn_t
1556 via_pmu_interrupt(int irq, void *arg)
1557 {
1558         unsigned long flags;
1559         int intr;
1560         int nloop = 0;
1561         int int_data = -1;
1562         struct adb_request *req = NULL;
1563         int handled = 0;
1564
1565         /* This is a bit brutal, we can probably do better */
1566         spin_lock_irqsave(&pmu_lock, flags);
1567         ++disable_poll;
1568
1569         for (;;) {
1570                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1571                 if (intr == 0)
1572                         break;
1573                 handled = 1;
1574                 if (++nloop > 1000) {
1575                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1576                                "intr=%x, ier=%x pmu_state=%d\n",
1577                                intr, in_8(&via[IER]), pmu_state);
1578                         break;
1579                 }
1580                 out_8(&via[IFR], intr);
1581                 if (intr & CB1_INT) {
1582                         adb_int_pending = 1;
1583                         pmu_irq_stats[0]++;
1584                 }
1585                 if (intr & SR_INT) {
1586                         req = pmu_sr_intr();
1587                         if (req)
1588                                 break;
1589                 }
1590         }
1591
1592 recheck:
1593         if (pmu_state == idle) {
1594                 if (adb_int_pending) {
1595                         if (int_data_state[0] == int_data_empty)
1596                                 int_data_last = 0;
1597                         else if (int_data_state[1] == int_data_empty)
1598                                 int_data_last = 1;
1599                         else
1600                                 goto no_free_slot;
1601                         pmu_state = intack;
1602                         int_data_state[int_data_last] = int_data_fill;
1603                         /* Sounds safer to make sure ACK is high before writing.
1604                          * This helped kill a problem with ADB and some iBooks
1605                          */
1606                         wait_for_ack();
1607                         send_byte(PMU_INT_ACK);
1608                         adb_int_pending = 0;
1609                 } else if (current_req)
1610                         pmu_start();
1611         }
1612 no_free_slot:
1613         /* Mark the oldest buffer for flushing */
1614         if (int_data_state[!int_data_last] == int_data_ready) {
1615                 int_data_state[!int_data_last] = int_data_flush;
1616                 int_data = !int_data_last;
1617         } else if (int_data_state[int_data_last] == int_data_ready) {
1618                 int_data_state[int_data_last] = int_data_flush;
1619                 int_data = int_data_last;
1620         }
1621         --disable_poll;
1622         spin_unlock_irqrestore(&pmu_lock, flags);
1623
1624         /* Deal with completed PMU requests outside of the lock */
1625         if (req) {
1626                 pmu_done(req);
1627                 req = NULL;
1628         }
1629
1630         /* Deal with interrupt datas outside of the lock */
1631         if (int_data >= 0) {
1632                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1633                 spin_lock_irqsave(&pmu_lock, flags);
1634                 ++disable_poll;
1635                 int_data_state[int_data] = int_data_empty;
1636                 int_data = -1;
1637                 goto recheck;
1638         }
1639
1640         return IRQ_RETVAL(handled);
1641 }
1642
1643 void
1644 pmu_unlock(void)
1645 {
1646         unsigned long flags;
1647
1648         spin_lock_irqsave(&pmu_lock, flags);
1649         if (pmu_state == locked)
1650                 pmu_state = idle;
1651         adb_int_pending = 1;
1652         spin_unlock_irqrestore(&pmu_lock, flags);
1653 }
1654
1655
1656 static irqreturn_t
1657 gpio1_interrupt(int irq, void *arg)
1658 {
1659         unsigned long flags;
1660
1661         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1662                 spin_lock_irqsave(&pmu_lock, flags);
1663                 if (gpio_irq_enabled > 0) {
1664                         disable_irq_nosync(gpio_irq);
1665                         gpio_irq_enabled = 0;
1666                 }
1667                 pmu_irq_stats[1]++;
1668                 adb_int_pending = 1;
1669                 spin_unlock_irqrestore(&pmu_lock, flags);
1670                 via_pmu_interrupt(0, NULL);
1671                 return IRQ_HANDLED;
1672         }
1673         return IRQ_NONE;
1674 }
1675
1676 void
1677 pmu_enable_irled(int on)
1678 {
1679         struct adb_request req;
1680
1681         if (vias == NULL)
1682                 return ;
1683         if (pmu_kind == PMU_KEYLARGO_BASED)
1684                 return ;
1685
1686         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1687             (on ? PMU_POW_ON : PMU_POW_OFF));
1688         pmu_wait_complete(&req);
1689 }
1690
1691 void
1692 pmu_restart(void)
1693 {
1694         struct adb_request req;
1695
1696         if (via == NULL)
1697                 return;
1698
1699         local_irq_disable();
1700
1701         drop_interrupts = 1;
1702
1703         if (pmu_kind != PMU_KEYLARGO_BASED) {
1704                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1705                                                 PMU_INT_TICK );
1706                 while(!req.complete)
1707                         pmu_poll();
1708         }
1709
1710         pmu_request(&req, NULL, 1, PMU_RESET);
1711         pmu_wait_complete(&req);
1712         for (;;)
1713                 ;
1714 }
1715
1716 void
1717 pmu_shutdown(void)
1718 {
1719         struct adb_request req;
1720
1721         if (via == NULL)
1722                 return;
1723
1724         local_irq_disable();
1725
1726         drop_interrupts = 1;
1727
1728         if (pmu_kind != PMU_KEYLARGO_BASED) {
1729                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1730                                                 PMU_INT_TICK );
1731                 pmu_wait_complete(&req);
1732         } else {
1733                 /* Disable server mode on shutdown or we'll just
1734                  * wake up again
1735                  */
1736                 pmu_set_server_mode(0);
1737         }
1738
1739         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1740                     'M', 'A', 'T', 'T');
1741         pmu_wait_complete(&req);
1742         for (;;)
1743                 ;
1744 }
1745
1746 int
1747 pmu_present(void)
1748 {
1749         return via != 0;
1750 }
1751
1752 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1753 /*
1754  * Put the powerbook to sleep.
1755  */
1756
1757 static u32 save_via[8];
1758
1759 static void
1760 save_via_state(void)
1761 {
1762         save_via[0] = in_8(&via[ANH]);
1763         save_via[1] = in_8(&via[DIRA]);
1764         save_via[2] = in_8(&via[B]);
1765         save_via[3] = in_8(&via[DIRB]);
1766         save_via[4] = in_8(&via[PCR]);
1767         save_via[5] = in_8(&via[ACR]);
1768         save_via[6] = in_8(&via[T1CL]);
1769         save_via[7] = in_8(&via[T1CH]);
1770 }
1771 static void
1772 restore_via_state(void)
1773 {
1774         out_8(&via[ANH], save_via[0]);
1775         out_8(&via[DIRA], save_via[1]);
1776         out_8(&via[B], save_via[2]);
1777         out_8(&via[DIRB], save_via[3]);
1778         out_8(&via[PCR], save_via[4]);
1779         out_8(&via[ACR], save_via[5]);
1780         out_8(&via[T1CL], save_via[6]);
1781         out_8(&via[T1CH], save_via[7]);
1782         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1783         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1784         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1785 }
1786
1787 #define GRACKLE_PM      (1<<7)
1788 #define GRACKLE_DOZE    (1<<5)
1789 #define GRACKLE_NAP     (1<<4)
1790 #define GRACKLE_SLEEP   (1<<3)
1791
1792 static int powerbook_sleep_grackle(void)
1793 {
1794         unsigned long save_l2cr;
1795         unsigned short pmcr1;
1796         struct adb_request req;
1797         struct pci_dev *grackle;
1798
1799         grackle = pci_get_bus_and_slot(0, 0);
1800         if (!grackle)
1801                 return -ENODEV;
1802
1803         /* Turn off various things. Darwin does some retry tests here... */
1804         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1805         pmu_wait_complete(&req);
1806         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1807                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1808         pmu_wait_complete(&req);
1809
1810         /* For 750, save backside cache setting and disable it */
1811         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1812
1813         if (!__fake_sleep) {
1814                 /* Ask the PMU to put us to sleep */
1815                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1816                 pmu_wait_complete(&req);
1817         }
1818
1819         /* The VIA is supposed not to be restored correctly*/
1820         save_via_state();
1821         /* We shut down some HW */
1822         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1823
1824         pci_read_config_word(grackle, 0x70, &pmcr1);
1825         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1826         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1827         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1828         pci_write_config_word(grackle, 0x70, pmcr1);
1829
1830         /* Call low-level ASM sleep handler */
1831         if (__fake_sleep)
1832                 mdelay(5000);
1833         else
1834                 low_sleep_handler();
1835
1836         /* We're awake again, stop grackle PM */
1837         pci_read_config_word(grackle, 0x70, &pmcr1);
1838         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1839         pci_write_config_word(grackle, 0x70, pmcr1);
1840
1841         pci_dev_put(grackle);
1842
1843         /* Make sure the PMU is idle */
1844         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1845         restore_via_state();
1846
1847         /* Restore L2 cache */
1848         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1849                 _set_L2CR(save_l2cr);
1850
1851         /* Restore userland MMU context */
1852         switch_mmu_context(NULL, current->active_mm);
1853
1854         /* Power things up */
1855         pmu_unlock();
1856         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1857         pmu_wait_complete(&req);
1858         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1859                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1860         pmu_wait_complete(&req);
1861         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1862                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1863         pmu_wait_complete(&req);
1864
1865         return 0;
1866 }
1867
1868 static int
1869 powerbook_sleep_Core99(void)
1870 {
1871         unsigned long save_l2cr;
1872         unsigned long save_l3cr;
1873         struct adb_request req;
1874
1875         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1876                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1877                 return -ENOSYS;
1878         }
1879
1880         if (num_online_cpus() > 1 || cpu_is_offline(0))
1881                 return -EAGAIN;
1882
1883         /* Stop environment and ADB interrupts */
1884         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1885         pmu_wait_complete(&req);
1886
1887         /* Tell PMU what events will wake us up */
1888         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1889                 0xff, 0xff);
1890         pmu_wait_complete(&req);
1891         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1892                 0, PMU_PWR_WAKEUP_KEY |
1893                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1894         pmu_wait_complete(&req);
1895
1896         /* Save the state of the L2 and L3 caches */
1897         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1898         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1899
1900         if (!__fake_sleep) {
1901                 /* Ask the PMU to put us to sleep */
1902                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1903                 pmu_wait_complete(&req);
1904         }
1905
1906         /* The VIA is supposed not to be restored correctly*/
1907         save_via_state();
1908
1909         /* Shut down various ASICs. There's a chance that we can no longer
1910          * talk to the PMU after this, so I moved it to _after_ sending the
1911          * sleep command to it. Still need to be checked.
1912          */
1913         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1914
1915         /* Call low-level ASM sleep handler */
1916         if (__fake_sleep)
1917                 mdelay(5000);
1918         else
1919                 low_sleep_handler();
1920
1921         /* Restore Apple core ASICs state */
1922         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1923
1924         /* Restore VIA */
1925         restore_via_state();
1926
1927         /* tweak LPJ before cpufreq is there */
1928         loops_per_jiffy *= 2;
1929
1930         /* Restore video */
1931         pmac_call_early_video_resume();
1932
1933         /* Restore L2 cache */
1934         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1935                 _set_L2CR(save_l2cr);
1936         /* Restore L3 cache */
1937         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1938                 _set_L3CR(save_l3cr);
1939
1940         /* Restore userland MMU context */
1941         switch_mmu_context(NULL, current->active_mm);
1942
1943         /* Tell PMU we are ready */
1944         pmu_unlock();
1945         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1946         pmu_wait_complete(&req);
1947         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1948         pmu_wait_complete(&req);
1949
1950         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1951         loops_per_jiffy /= 2;
1952
1953         return 0;
1954 }
1955
1956 #define PB3400_MEM_CTRL         0xf8000000
1957 #define PB3400_MEM_CTRL_SLEEP   0x70
1958
1959 static void __iomem *pb3400_mem_ctrl;
1960
1961 static void powerbook_sleep_init_3400(void)
1962 {
1963         /* map in the memory controller registers */
1964         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1965         if (pb3400_mem_ctrl == NULL)
1966                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1967 }
1968
1969 static int powerbook_sleep_3400(void)
1970 {
1971         int i, x;
1972         unsigned int hid0;
1973         unsigned long msr;
1974         struct adb_request sleep_req;
1975         unsigned int __iomem *mem_ctrl_sleep;
1976
1977         if (pb3400_mem_ctrl == NULL)
1978                 return -ENOMEM;
1979         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1980
1981         /* Set the memory controller to keep the memory refreshed
1982            while we're asleep */
1983         for (i = 0x403f; i >= 0x4000; --i) {
1984                 out_be32(mem_ctrl_sleep, i);
1985                 do {
1986                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1987                 } while (x == 0);
1988                 if (x >= 0x100)
1989                         break;
1990         }
1991
1992         /* Ask the PMU to put us to sleep */
1993         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1994         pmu_wait_complete(&sleep_req);
1995         pmu_unlock();
1996
1997         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1998
1999         asleep = 1;
2000
2001         /* Put the CPU into sleep mode */
2002         hid0 = mfspr(SPRN_HID0);
2003         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2004         mtspr(SPRN_HID0, hid0);
2005         local_irq_enable();
2006         msr = mfmsr() | MSR_POW;
2007         while (asleep) {
2008                 mb();
2009                 mtmsr(msr);
2010                 isync();
2011         }
2012         local_irq_disable();
2013
2014         /* OK, we're awake again, start restoring things */
2015         out_be32(mem_ctrl_sleep, 0x3f);
2016         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2017
2018         return 0;
2019 }
2020
2021 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2022
2023 /*
2024  * Support for /dev/pmu device
2025  */
2026 #define RB_SIZE         0x10
2027 struct pmu_private {
2028         struct list_head list;
2029         int     rb_get;
2030         int     rb_put;
2031         struct rb_entry {
2032                 unsigned short len;
2033                 unsigned char data[16];
2034         }       rb_buf[RB_SIZE];
2035         wait_queue_head_t wait;
2036         spinlock_t lock;
2037 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2038         int     backlight_locker;
2039 #endif
2040 };
2041
2042 static LIST_HEAD(all_pmu_pvt);
2043 static DEFINE_SPINLOCK(all_pvt_lock);
2044
2045 static void
2046 pmu_pass_intr(unsigned char *data, int len)
2047 {
2048         struct pmu_private *pp;
2049         struct list_head *list;
2050         int i;
2051         unsigned long flags;
2052
2053         if (len > sizeof(pp->rb_buf[0].data))
2054                 len = sizeof(pp->rb_buf[0].data);
2055         spin_lock_irqsave(&all_pvt_lock, flags);
2056         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2057                 pp = list_entry(list, struct pmu_private, list);
2058                 spin_lock(&pp->lock);
2059                 i = pp->rb_put + 1;
2060                 if (i >= RB_SIZE)
2061                         i = 0;
2062                 if (i != pp->rb_get) {
2063                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2064                         rp->len = len;
2065                         memcpy(rp->data, data, len);
2066                         pp->rb_put = i;
2067                         wake_up_interruptible(&pp->wait);
2068                 }
2069                 spin_unlock(&pp->lock);
2070         }
2071         spin_unlock_irqrestore(&all_pvt_lock, flags);
2072 }
2073
2074 static int
2075 pmu_open(struct inode *inode, struct file *file)
2076 {
2077         struct pmu_private *pp;
2078         unsigned long flags;
2079
2080         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2081         if (pp == 0)
2082                 return -ENOMEM;
2083         pp->rb_get = pp->rb_put = 0;
2084         spin_lock_init(&pp->lock);
2085         init_waitqueue_head(&pp->wait);
2086         mutex_lock(&pmu_info_proc_mutex);
2087         spin_lock_irqsave(&all_pvt_lock, flags);
2088 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2089         pp->backlight_locker = 0;
2090 #endif
2091         list_add(&pp->list, &all_pmu_pvt);
2092         spin_unlock_irqrestore(&all_pvt_lock, flags);
2093         file->private_data = pp;
2094         mutex_unlock(&pmu_info_proc_mutex);
2095         return 0;
2096 }
2097
2098 static ssize_t
2099 pmu_read(struct file *file, char __user *buf,
2100                         size_t count, loff_t *ppos)
2101 {
2102         struct pmu_private *pp = file->private_data;
2103         DECLARE_WAITQUEUE(wait, current);
2104         unsigned long flags;
2105         int ret = 0;
2106
2107         if (count < 1 || pp == 0)
2108                 return -EINVAL;
2109         if (!access_ok(VERIFY_WRITE, buf, count))
2110                 return -EFAULT;
2111
2112         spin_lock_irqsave(&pp->lock, flags);
2113         add_wait_queue(&pp->wait, &wait);
2114         current->state = TASK_INTERRUPTIBLE;
2115
2116         for (;;) {
2117                 ret = -EAGAIN;
2118                 if (pp->rb_get != pp->rb_put) {
2119                         int i = pp->rb_get;
2120                         struct rb_entry *rp = &pp->rb_buf[i];
2121                         ret = rp->len;
2122                         spin_unlock_irqrestore(&pp->lock, flags);
2123                         if (ret > count)
2124                                 ret = count;
2125                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2126                                 ret = -EFAULT;
2127                         if (++i >= RB_SIZE)
2128                                 i = 0;
2129                         spin_lock_irqsave(&pp->lock, flags);
2130                         pp->rb_get = i;
2131                 }
2132                 if (ret >= 0)
2133                         break;
2134                 if (file->f_flags & O_NONBLOCK)
2135                         break;
2136                 ret = -ERESTARTSYS;
2137                 if (signal_pending(current))
2138                         break;
2139                 spin_unlock_irqrestore(&pp->lock, flags);
2140                 schedule();
2141                 spin_lock_irqsave(&pp->lock, flags);
2142         }
2143         current->state = TASK_RUNNING;
2144         remove_wait_queue(&pp->wait, &wait);
2145         spin_unlock_irqrestore(&pp->lock, flags);
2146
2147         return ret;
2148 }
2149
2150 static ssize_t
2151 pmu_write(struct file *file, const char __user *buf,
2152                          size_t count, loff_t *ppos)
2153 {
2154         return 0;
2155 }
2156
2157 static unsigned int
2158 pmu_fpoll(struct file *filp, poll_table *wait)
2159 {
2160         struct pmu_private *pp = filp->private_data;
2161         unsigned int mask = 0;
2162         unsigned long flags;
2163
2164         if (pp == 0)
2165                 return 0;
2166         poll_wait(filp, &pp->wait, wait);
2167         spin_lock_irqsave(&pp->lock, flags);
2168         if (pp->rb_get != pp->rb_put)
2169                 mask |= POLLIN;
2170         spin_unlock_irqrestore(&pp->lock, flags);
2171         return mask;
2172 }
2173
2174 static int
2175 pmu_release(struct inode *inode, struct file *file)
2176 {
2177         struct pmu_private *pp = file->private_data;
2178         unsigned long flags;
2179
2180         if (pp != 0) {
2181                 file->private_data = NULL;
2182                 spin_lock_irqsave(&all_pvt_lock, flags);
2183                 list_del(&pp->list);
2184                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2185
2186 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2187                 if (pp->backlight_locker)
2188                         pmac_backlight_enable();
2189 #endif
2190
2191                 kfree(pp);
2192         }
2193         return 0;
2194 }
2195
2196 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2197 static void pmac_suspend_disable_irqs(void)
2198 {
2199         /* Call platform functions marked "on sleep" */
2200         pmac_pfunc_i2c_suspend();
2201         pmac_pfunc_base_suspend();
2202 }
2203
2204 static int powerbook_sleep(suspend_state_t state)
2205 {
2206         int error = 0;
2207
2208         /* Wait for completion of async requests */
2209         while (!batt_req.complete)
2210                 pmu_poll();
2211
2212         /* Giveup the lazy FPU & vec so we don't have to back them
2213          * up from the low level code
2214          */
2215         enable_kernel_fp();
2216
2217 #ifdef CONFIG_ALTIVEC
2218         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2219                 enable_kernel_altivec();
2220 #endif /* CONFIG_ALTIVEC */
2221
2222         switch (pmu_kind) {
2223         case PMU_OHARE_BASED:
2224                 error = powerbook_sleep_3400();
2225                 break;
2226         case PMU_HEATHROW_BASED:
2227         case PMU_PADDINGTON_BASED:
2228                 error = powerbook_sleep_grackle();
2229                 break;
2230         case PMU_KEYLARGO_BASED:
2231                 error = powerbook_sleep_Core99();
2232                 break;
2233         default:
2234                 return -ENOSYS;
2235         }
2236
2237         if (error)
2238                 return error;
2239
2240         mdelay(100);
2241
2242         return 0;
2243 }
2244
2245 static void pmac_suspend_enable_irqs(void)
2246 {
2247         /* Force a poll of ADB interrupts */
2248         adb_int_pending = 1;
2249         via_pmu_interrupt(0, NULL);
2250
2251         mdelay(10);
2252
2253         /* Call platform functions marked "on wake" */
2254         pmac_pfunc_base_resume();
2255         pmac_pfunc_i2c_resume();
2256 }
2257
2258 static int pmu_sleep_valid(suspend_state_t state)
2259 {
2260         return state == PM_SUSPEND_MEM
2261                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2262 }
2263
2264 static const struct platform_suspend_ops pmu_pm_ops = {
2265         .enter = powerbook_sleep,
2266         .valid = pmu_sleep_valid,
2267 };
2268
2269 static int register_pmu_pm_ops(void)
2270 {
2271         if (pmu_kind == PMU_OHARE_BASED)
2272                 powerbook_sleep_init_3400();
2273         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2274         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2275         suspend_set_ops(&pmu_pm_ops);
2276
2277         return 0;
2278 }
2279
2280 device_initcall(register_pmu_pm_ops);
2281 #endif
2282
2283 static int pmu_ioctl(struct file *filp,
2284                      u_int cmd, u_long arg)
2285 {
2286         __u32 __user *argp = (__u32 __user *)arg;
2287         int error = -EINVAL;
2288
2289         switch (cmd) {
2290         case PMU_IOC_SLEEP:
2291                 if (!capable(CAP_SYS_ADMIN))
2292                         return -EACCES;
2293                 return pm_suspend(PM_SUSPEND_MEM);
2294         case PMU_IOC_CAN_SLEEP:
2295                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2296                         return put_user(0, argp);
2297                 else
2298                         return put_user(1, argp);
2299
2300 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2301         /* Compatibility ioctl's for backlight */
2302         case PMU_IOC_GET_BACKLIGHT:
2303         {
2304                 int brightness;
2305
2306                 brightness = pmac_backlight_get_legacy_brightness();
2307                 if (brightness < 0)
2308                         return brightness;
2309                 else
2310                         return put_user(brightness, argp);
2311
2312         }
2313         case PMU_IOC_SET_BACKLIGHT:
2314         {
2315                 int brightness;
2316
2317                 error = get_user(brightness, argp);
2318                 if (error)
2319                         return error;
2320
2321                 return pmac_backlight_set_legacy_brightness(brightness);
2322         }
2323 #ifdef CONFIG_INPUT_ADBHID
2324         case PMU_IOC_GRAB_BACKLIGHT: {
2325                 struct pmu_private *pp = filp->private_data;
2326
2327                 if (pp->backlight_locker)
2328                         return 0;
2329
2330                 pp->backlight_locker = 1;
2331                 pmac_backlight_disable();
2332
2333                 return 0;
2334         }
2335 #endif /* CONFIG_INPUT_ADBHID */
2336 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2337
2338         case PMU_IOC_GET_MODEL:
2339                 return put_user(pmu_kind, argp);
2340         case PMU_IOC_HAS_ADB:
2341                 return put_user(pmu_has_adb, argp);
2342         }
2343         return error;
2344 }
2345
2346 static long pmu_unlocked_ioctl(struct file *filp,
2347                                u_int cmd, u_long arg)
2348 {
2349         int ret;
2350
2351         mutex_lock(&pmu_info_proc_mutex);
2352         ret = pmu_ioctl(filp, cmd, arg);
2353         mutex_unlock(&pmu_info_proc_mutex);
2354
2355         return ret;
2356 }
2357
2358 #ifdef CONFIG_COMPAT
2359 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2360 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2361 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2362 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2363 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2364 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2365
2366 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2367 {
2368         switch (cmd) {
2369         case PMU_IOC_SLEEP:
2370                 break;
2371         case PMU_IOC_GET_BACKLIGHT32:
2372                 cmd = PMU_IOC_GET_BACKLIGHT;
2373                 break;
2374         case PMU_IOC_SET_BACKLIGHT32:
2375                 cmd = PMU_IOC_SET_BACKLIGHT;
2376                 break;
2377         case PMU_IOC_GET_MODEL32:
2378                 cmd = PMU_IOC_GET_MODEL;
2379                 break;
2380         case PMU_IOC_HAS_ADB32:
2381                 cmd = PMU_IOC_HAS_ADB;
2382                 break;
2383         case PMU_IOC_CAN_SLEEP32:
2384                 cmd = PMU_IOC_CAN_SLEEP;
2385                 break;
2386         case PMU_IOC_GRAB_BACKLIGHT32:
2387                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2388                 break;
2389         default:
2390                 return -ENOIOCTLCMD;
2391         }
2392         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2393 }
2394 #endif
2395
2396 static const struct file_operations pmu_device_fops = {
2397         .read           = pmu_read,
2398         .write          = pmu_write,
2399         .poll           = pmu_fpoll,
2400         .unlocked_ioctl = pmu_unlocked_ioctl,
2401 #ifdef CONFIG_COMPAT
2402         .compat_ioctl   = compat_pmu_ioctl,
2403 #endif
2404         .open           = pmu_open,
2405         .release        = pmu_release,
2406         .llseek         = noop_llseek,
2407 };
2408
2409 static struct miscdevice pmu_device = {
2410         PMU_MINOR, "pmu", &pmu_device_fops
2411 };
2412
2413 static int pmu_device_init(void)
2414 {
2415         if (!via)
2416                 return 0;
2417         if (misc_register(&pmu_device) < 0)
2418                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2419         return 0;
2420 }
2421 device_initcall(pmu_device_init);
2422
2423
2424 #ifdef DEBUG_SLEEP
2425 static inline void
2426 polled_handshake(volatile unsigned char __iomem *via)
2427 {
2428         via[B] &= ~TREQ; eieio();
2429         while ((via[B] & TACK) != 0)
2430                 ;
2431         via[B] |= TREQ; eieio();
2432         while ((via[B] & TACK) == 0)
2433                 ;
2434 }
2435
2436 static inline void
2437 polled_send_byte(volatile unsigned char __iomem *via, int x)
2438 {
2439         via[ACR] |= SR_OUT | SR_EXT; eieio();
2440         via[SR] = x; eieio();
2441         polled_handshake(via);
2442 }
2443
2444 static inline int
2445 polled_recv_byte(volatile unsigned char __iomem *via)
2446 {
2447         int x;
2448
2449         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2450         x = via[SR]; eieio();
2451         polled_handshake(via);
2452         x = via[SR]; eieio();
2453         return x;
2454 }
2455
2456 int
2457 pmu_polled_request(struct adb_request *req)
2458 {
2459         unsigned long flags;
2460         int i, l, c;
2461         volatile unsigned char __iomem *v = via;
2462
2463         req->complete = 1;
2464         c = req->data[0];
2465         l = pmu_data_len[c][0];
2466         if (l >= 0 && req->nbytes != l + 1)
2467                 return -EINVAL;
2468
2469         local_irq_save(flags);
2470         while (pmu_state != idle)
2471                 pmu_poll();
2472
2473         while ((via[B] & TACK) == 0)
2474                 ;
2475         polled_send_byte(v, c);
2476         if (l < 0) {
2477                 l = req->nbytes - 1;
2478                 polled_send_byte(v, l);
2479         }
2480         for (i = 1; i <= l; ++i)
2481                 polled_send_byte(v, req->data[i]);
2482
2483         l = pmu_data_len[c][1];
2484         if (l < 0)
2485                 l = polled_recv_byte(v);
2486         for (i = 0; i < l; ++i)
2487                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2488
2489         if (req->done)
2490                 (*req->done)(req);
2491
2492         local_irq_restore(flags);
2493         return 0;
2494 }
2495
2496 /* N.B. This doesn't work on the 3400 */
2497 void pmu_blink(int n)
2498 {
2499         struct adb_request req;
2500
2501         memset(&req, 0, sizeof(req));
2502
2503         for (; n > 0; --n) {
2504                 req.nbytes = 4;
2505                 req.done = NULL;
2506                 req.data[0] = 0xee;
2507                 req.data[1] = 4;
2508                 req.data[2] = 0;
2509                 req.data[3] = 1;
2510                 req.reply[0] = ADB_RET_OK;
2511                 req.reply_len = 1;
2512                 req.reply_expected = 0;
2513                 pmu_polled_request(&req);
2514                 mdelay(50);
2515                 req.nbytes = 4;
2516                 req.done = NULL;
2517                 req.data[0] = 0xee;
2518                 req.data[1] = 4;
2519                 req.data[2] = 0;
2520                 req.data[3] = 0;
2521                 req.reply[0] = ADB_RET_OK;
2522                 req.reply_len = 1;
2523                 req.reply_expected = 0;
2524                 pmu_polled_request(&req);
2525                 mdelay(50);
2526         }
2527         mdelay(50);
2528 }
2529 #endif /* DEBUG_SLEEP */
2530
2531 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2532 int pmu_sys_suspended;
2533
2534 static int pmu_syscore_suspend(void)
2535 {
2536         /* Suspend PMU event interrupts */
2537         pmu_suspend();
2538         pmu_sys_suspended = 1;
2539
2540 #ifdef CONFIG_PMAC_BACKLIGHT
2541         /* Tell backlight code not to muck around with the chip anymore */
2542         pmu_backlight_set_sleep(1);
2543 #endif
2544
2545         return 0;
2546 }
2547
2548 static void pmu_syscore_resume(void)
2549 {
2550         struct adb_request req;
2551
2552         if (!pmu_sys_suspended)
2553                 return;
2554
2555         /* Tell PMU we are ready */
2556         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2557         pmu_wait_complete(&req);
2558
2559 #ifdef CONFIG_PMAC_BACKLIGHT
2560         /* Tell backlight code it can use the chip again */
2561         pmu_backlight_set_sleep(0);
2562 #endif
2563         /* Resume PMU event interrupts */
2564         pmu_resume();
2565         pmu_sys_suspended = 0;
2566 }
2567
2568 static struct syscore_ops pmu_syscore_ops = {
2569         .suspend = pmu_syscore_suspend,
2570         .resume = pmu_syscore_resume,
2571 };
2572
2573 static int pmu_syscore_register(void)
2574 {
2575         register_syscore_ops(&pmu_syscore_ops);
2576
2577         return 0;
2578 }
2579 subsys_initcall(pmu_syscore_register);
2580 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2581
2582 EXPORT_SYMBOL(pmu_request);
2583 EXPORT_SYMBOL(pmu_queue_request);
2584 EXPORT_SYMBOL(pmu_poll);
2585 EXPORT_SYMBOL(pmu_poll_adb);
2586 EXPORT_SYMBOL(pmu_wait_complete);
2587 EXPORT_SYMBOL(pmu_suspend);
2588 EXPORT_SYMBOL(pmu_resume);
2589 EXPORT_SYMBOL(pmu_unlock);
2590 #if defined(CONFIG_PPC32)
2591 EXPORT_SYMBOL(pmu_enable_irled);
2592 EXPORT_SYMBOL(pmu_battery_count);
2593 EXPORT_SYMBOL(pmu_batteries);
2594 EXPORT_SYMBOL(pmu_power_flags);
2595 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2596