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