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                         of_node_put(gpiop);
 333                 }
 334                 if (gpio_reg == NULL) {
 335                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 336                         goto fail;
 337                 }
 338         } else
 339                 pmu_kind = PMU_UNKNOWN;
 340
 341         via = ioremap(taddr, 0x2000);
 342         if (via == NULL) {
 343                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 344                 goto fail_via_remap;
 345         }
 346
 347         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 348         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 349
 350         pmu_state = idle;
 351
 352         if (!init_pmu())
 353                 goto fail_init;
 354
 355         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 356                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 357
 358         sys_ctrler = SYS_CTRLER_PMU;
 359
 360         return 1;
 361
 362  fail_init:
 363         iounmap(via);
 364         via = NULL;
 365  fail_via_remap:
 366         iounmap(gpio_reg);
 367         gpio_reg = NULL;
 368  fail:
 369         of_node_put(vias);
 370         vias = NULL;
 371         return 0;
 372 }
 373
 374 #ifdef CONFIG_ADB
 375 static int pmu_probe(void)
 376 {
 377         return vias == NULL? -ENODEV: 0;
 378 }
 379
 380 static int __init pmu_init(void)
 381 {
 382         if (vias == NULL)
 383                 return -ENODEV;
 384         return 0;
 385 }
 386 #endif /* CONFIG_ADB */
 387
 388 /*
 389  * We can't wait until pmu_init gets called, that happens too late.
 390  * It happens after IDE and SCSI initialization, which can take a few
 391  * seconds, and by that time the PMU could have given up on us and
 392  * turned us off.
 393  * Thus this is called with arch_initcall rather than device_initcall.
 394  */
 395 static int __init via_pmu_start(void)
 396 {
 397         unsigned int irq;
 398
 399         if (vias == NULL)
 400                 return -ENODEV;
 401
 402         batt_req.complete = 1;
 403
 404         irq = irq_of_parse_and_map(vias, 0);
 405         if (irq == NO_IRQ) {
 406                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 407                 return -ENODEV;
 408         }
 409         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 410          * to be disabled between the 2 passes of driver suspend, we
 411          * control our own disabling for that one
 412          */
 413         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 414                         "VIA-PMU", (void *)0)) {
 415                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 416                 return -ENODEV;
 417         }
 418
 419         if (pmu_kind == PMU_KEYLARGO_BASED) {
 420                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 421                 if (gpio_node == NULL)
 422                         gpio_node = of_find_node_by_name(NULL,
 423                                                          "pmu-interrupt");
 424                 if (gpio_node)
 425                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 426
 427                 if (gpio_irq != NO_IRQ) {
 428                         if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
 429                                         "GPIO1 ADB", (void *)0))
 430                                 printk(KERN_ERR "pmu: can't get irq %d"
 431                                        " (GPIO1)\n", gpio_irq);
 432                         else
 433                                 gpio_irq_enabled = 1;
 434                 }
 435         }
 436
 437         /* Enable interrupts */
 438         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 439
 440         pmu_fully_inited = 1;
 441
 442         /* Make sure PMU settle down before continuing. This is _very_ important
 443          * since the IDE probe may shut interrupts down for quite a bit of time. If
 444          * a PMU communication is pending while this happens, the PMU may timeout
 445          * Not that on Core99 machines, the PMU keeps sending us environement
 446          * messages, we should find a way to either fix IDE or make it call
 447          * pmu_suspend() before masking interrupts. This can also happens while
 448          * scolling with some fbdevs.
 449          */
 450         do {
 451                 pmu_poll();
 452         } while (pmu_state != idle);
 453
 454         return 0;
 455 }
 456
 457 arch_initcall(via_pmu_start);
 458
 459 /*
 460  * This has to be done after pci_init, which is a subsys_initcall.
 461  */
 462 static int __init via_pmu_dev_init(void)
 463 {
 464         if (vias == NULL)
 465                 return -ENODEV;
 466
 467 #ifdef CONFIG_PMAC_BACKLIGHT
 468         /* Initialize backlight */
 469         pmu_backlight_init();
 470 #endif
 471
 472 #ifdef CONFIG_PPC32
 473         if (of_machine_is_compatible("AAPL,3400/2400") ||
 474                 of_machine_is_compatible("AAPL,3500")) {
 475                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 476                         NULL, PMAC_MB_INFO_MODEL, 0);
 477                 pmu_battery_count = 1;
 478                 if (mb == PMAC_TYPE_COMET)
 479                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 480                 else
 481                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 482         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 483                 of_machine_is_compatible("PowerBook1,1")) {
 484                 pmu_battery_count = 2;
 485                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 486                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 487         } else {
 488                 struct device_node* prim =
 489                         of_find_node_by_name(NULL, "power-mgt");
 490                 const u32 *prim_info = NULL;
 491                 if (prim)
 492                         prim_info = of_get_property(prim, "prim-info", NULL);
 493                 if (prim_info) {
 494                         /* Other stuffs here yet unknown */
 495                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 496                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 497                         if (pmu_battery_count > 1)
 498                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 499                 }
 500                 of_node_put(prim);
 501         }
 502 #endif /* CONFIG_PPC32 */
 503
 504         /* Create /proc/pmu */
 505         proc_pmu_root = proc_mkdir("pmu", NULL);
 506         if (proc_pmu_root) {
 507                 long i;
 508
 509                 for (i=0; i<pmu_battery_count; i++) {
 510                         char title[16];
 511                         sprintf(title, "battery_%ld", i);
 512                         proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 513                                         &pmu_battery_proc_fops, (void *)i);
 514                 }
 515
 516                 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 517                 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 518                                                 &pmu_irqstats_proc_fops);
 519                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 520                                                 &pmu_options_proc_fops);
 521         }
 522         return 0;
 523 }
 524
 525 device_initcall(via_pmu_dev_init);
 526
 527 static int
 528 init_pmu(void)
 529 {
 530         int timeout;
 531         struct adb_request req;
 532
 533         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 534         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 535
 536         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 537         timeout =  100000;
 538         while (!req.complete) {
 539                 if (--timeout < 0) {
 540                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 541                         return 0;
 542                 }
 543                 udelay(10);
 544                 pmu_poll();
 545         }
 546
 547         /* ack all pending interrupts */
 548         timeout = 100000;
 549         interrupt_data[0][0] = 1;
 550         while (interrupt_data[0][0] || pmu_state != idle) {
 551                 if (--timeout < 0) {
 552                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 553                         return 0;
 554                 }
 555                 if (pmu_state == idle)
 556                         adb_int_pending = 1;
 557                 via_pmu_interrupt(0, NULL);
 558                 udelay(10);
 559         }
 560
 561         /* Tell PMU we are ready.  */
 562         if (pmu_kind == PMU_KEYLARGO_BASED) {
 563                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 564                 while (!req.complete)
 565                         pmu_poll();
 566         }
 567
 568         /* Read PMU version */
 569         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 570         pmu_wait_complete(&req);
 571         if (req.reply_len > 0)
 572                 pmu_version = req.reply[0];
 573
 574         /* Read server mode setting */
 575         if (pmu_kind == PMU_KEYLARGO_BASED) {
 576                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 577                             PMU_PWR_GET_POWERUP_EVENTS);
 578                 pmu_wait_complete(&req);
 579                 if (req.reply_len == 2) {
 580                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 581                                 option_server_mode = 1;
 582                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 583                                option_server_mode ? "enabled" : "disabled");
 584                 }
 585         }
 586         return 1;
 587 }
 588
 589 int
 590 pmu_get_model(void)
 591 {
 592         return pmu_kind;
 593 }
 594
 595 static void pmu_set_server_mode(int server_mode)
 596 {
 597         struct adb_request req;
 598
 599         if (pmu_kind != PMU_KEYLARGO_BASED)
 600                 return;
 601
 602         option_server_mode = server_mode;
 603         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 604         pmu_wait_complete(&req);
 605         if (req.reply_len < 2)
 606                 return;
 607         if (server_mode)
 608                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 609                             PMU_PWR_SET_POWERUP_EVENTS,
 610                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 611         else
 612                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 613                             PMU_PWR_CLR_POWERUP_EVENTS,
 614                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 615         pmu_wait_complete(&req);
 616 }
 617
 618 /* This new version of the code for 2400/3400/3500 powerbooks
 619  * is inspired from the implementation in gkrellm-pmu
 620  */
 621 static void
 622 done_battery_state_ohare(struct adb_request* req)
 623 {
 624         /* format:
 625          *  [0]    :  flags
 626          *    0x01 :  AC indicator
 627          *    0x02 :  charging
 628          *    0x04 :  battery exist
 629          *    0x08 :
 630          *    0x10 :
 631          *    0x20 :  full charged
 632          *    0x40 :  pcharge reset
 633          *    0x80 :  battery exist
 634          *
 635          *  [1][2] :  battery voltage
 636          *  [3]    :  CPU temperature
 637          *  [4]    :  battery temperature
 638          *  [5]    :  current
 639          *  [6][7] :  pcharge
 640          *              --tkoba
 641          */
 642         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 643         long pcharge, charge, vb, vmax, lmax;
 644         long vmax_charging, vmax_charged;
 645         long amperage, voltage, time, max;
 646         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 647                         NULL, PMAC_MB_INFO_MODEL, 0);
 648
 649         if (req->reply[0] & 0x01)
 650                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 651         else
 652                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 653
 654         if (mb == PMAC_TYPE_COMET) {
 655                 vmax_charged = 189;
 656                 vmax_charging = 213;
 657                 lmax = 6500;
 658         } else {
 659                 vmax_charged = 330;
 660                 vmax_charging = 330;
 661                 lmax = 6500;
 662         }
 663         vmax = vmax_charged;
 664
 665         /* If battery installed */
 666         if (req->reply[0] & 0x04) {
 667                 bat_flags |= PMU_BATT_PRESENT;
 668                 if (req->reply[0] & 0x02)
 669                         bat_flags |= PMU_BATT_CHARGING;
 670                 vb = (req->reply[1] << 8) | req->reply[2];
 671                 voltage = (vb * 265 + 72665) / 10;
 672                 amperage = req->reply[5];
 673                 if ((req->reply[0] & 0x01) == 0) {
 674                         if (amperage > 200)
 675                                 vb += ((amperage - 200) * 15)/100;
 676                 } else if (req->reply[0] & 0x02) {
 677                         vb = (vb * 97) / 100;
 678                         vmax = vmax_charging;
 679                 }
 680                 charge = (100 * vb) / vmax;
 681                 if (req->reply[0] & 0x40) {
 682                         pcharge = (req->reply[6] << 8) + req->reply[7];
 683                         if (pcharge > lmax)
 684                                 pcharge = lmax;
 685                         pcharge *= 100;
 686                         pcharge = 100 - pcharge / lmax;
 687                         if (pcharge < charge)
 688                                 charge = pcharge;
 689                 }
 690                 if (amperage > 0)
 691                         time = (charge * 16440) / amperage;
 692                 else
 693                         time = 0;
 694                 max = 100;
 695                 amperage = -amperage;
 696         } else
 697                 charge = max = amperage = voltage = time = 0;
 698
 699         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 700         pmu_batteries[pmu_cur_battery].charge = charge;
 701         pmu_batteries[pmu_cur_battery].max_charge = max;
 702         pmu_batteries[pmu_cur_battery].amperage = amperage;
 703         pmu_batteries[pmu_cur_battery].voltage = voltage;
 704         pmu_batteries[pmu_cur_battery].time_remaining = time;
 705
 706         clear_bit(0, &async_req_locks);
 707 }
 708
 709 static void
 710 done_battery_state_smart(struct adb_request* req)
 711 {
 712         /* format:
 713          *  [0] : format of this structure (known: 3,4,5)
 714          *  [1] : flags
 715          *
 716          *  format 3 & 4:
 717          *
 718          *  [2] : charge
 719          *  [3] : max charge
 720          *  [4] : current
 721          *  [5] : voltage
 722          *
 723          *  format 5:
 724          *
 725          *  [2][3] : charge
 726          *  [4][5] : max charge
 727          *  [6][7] : current
 728          *  [8][9] : voltage
 729          */
 730
 731         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 732         int amperage;
 733         unsigned int capa, max, voltage;
 734
 735         if (req->reply[1] & 0x01)
 736                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 737         else
 738                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 739
 740
 741         capa = max = amperage = voltage = 0;
 742
 743         if (req->reply[1] & 0x04) {
 744                 bat_flags |= PMU_BATT_PRESENT;
 745                 switch(req->reply[0]) {
 746                         case 3:
 747                         case 4: capa = req->reply[2];
 748                                 max = req->reply[3];
 749                                 amperage = *((signed char *)&req->reply[4]);
 750                                 voltage = req->reply[5];
 751                                 break;
 752                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 753                                 max = (req->reply[4] << 8) | req->reply[5];
 754                                 amperage = *((signed short *)&req->reply[6]);
 755                                 voltage = (req->reply[8] << 8) | req->reply[9];
 756                                 break;
 757                         default:
 758                                 pr_warn("pmu.c: unrecognized battery info, "
 759                                         "len: %d, %4ph\n", req->reply_len,
 760                                                            req->reply);
 761                                 break;
 762                 }
 763         }
 764
 765         if ((req->reply[1] & 0x01) && (amperage > 0))
 766                 bat_flags |= PMU_BATT_CHARGING;
 767
 768         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 769         pmu_batteries[pmu_cur_battery].charge = capa;
 770         pmu_batteries[pmu_cur_battery].max_charge = max;
 771         pmu_batteries[pmu_cur_battery].amperage = amperage;
 772         pmu_batteries[pmu_cur_battery].voltage = voltage;
 773         if (amperage) {
 774                 if ((req->reply[1] & 0x01) && (amperage > 0))
 775                         pmu_batteries[pmu_cur_battery].time_remaining
 776                                 = ((max-capa) * 3600) / amperage;
 777                 else
 778                         pmu_batteries[pmu_cur_battery].time_remaining
 779                                 = (capa * 3600) / (-amperage);
 780         } else
 781                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 782
 783         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 784
 785         clear_bit(0, &async_req_locks);
 786 }
 787
 788 static void
 789 query_battery_state(void)
 790 {
 791         if (test_and_set_bit(0, &async_req_locks))
 792                 return;
 793         if (pmu_kind == PMU_OHARE_BASED)
 794                 pmu_request(&batt_req, done_battery_state_ohare,
 795                         1, PMU_BATTERY_STATE);
 796         else
 797                 pmu_request(&batt_req, done_battery_state_smart,
 798                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 799 }
 800
 801 static int pmu_info_proc_show(struct seq_file *m, void *v)
 802 {
 803         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 804         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 805         seq_printf(m, "AC Power               : %d\n",
 806                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 807         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 808
 809         return 0;
 810 }
 811
 812 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 813 {
 814         return single_open(file, pmu_info_proc_show, NULL);
 815 }
 816
 817 static const struct file_operations pmu_info_proc_fops = {
 818         .owner          = THIS_MODULE,
 819         .open           = pmu_info_proc_open,
 820         .read           = seq_read,
 821         .llseek         = seq_lseek,
 822         .release        = single_release,
 823 };
 824
 825 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 826 {
 827         int i;
 828         static const char *irq_names[] = {
 829                 "Total CB1 triggered events",
 830                 "Total GPIO1 triggered events",
 831                 "PC-Card eject button",
 832                 "Sound/Brightness button",
 833                 "ADB message",
 834                 "Battery state change",
 835                 "Environment interrupt",
 836                 "Tick timer",
 837                 "Ghost interrupt (zero len)",
 838                 "Empty interrupt (empty mask)",
 839                 "Max irqs in a row"
 840         };
 841
 842         for (i=0; i<11; i++) {
 843                 seq_printf(m, " %2u: %10u (%s)\n",
 844                              i, pmu_irq_stats[i], irq_names[i]);
 845         }
 846         return 0;
 847 }
 848
 849 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 850 {
 851         return single_open(file, pmu_irqstats_proc_show, NULL);
 852 }
 853
 854 static const struct file_operations pmu_irqstats_proc_fops = {
 855         .owner          = THIS_MODULE,
 856         .open           = pmu_irqstats_proc_open,
 857         .read           = seq_read,
 858         .llseek         = seq_lseek,
 859         .release        = single_release,
 860 };
 861
 862 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 863 {
 864         long batnum = (long)m->private;
 865
 866         seq_putc(m, '\n');
 867         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 868         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 869         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 870         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 871         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 872         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 873         return 0;
 874 }
 875
 876 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 877 {
 878         return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
 879 }
 880
 881 static const struct file_operations pmu_battery_proc_fops = {
 882         .owner          = THIS_MODULE,
 883         .open           = pmu_battery_proc_open,
 884         .read           = seq_read,
 885         .llseek         = seq_lseek,
 886         .release        = single_release,
 887 };
 888
 889 static int pmu_options_proc_show(struct seq_file *m, void *v)
 890 {
 891 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 892         if (pmu_kind == PMU_KEYLARGO_BASED &&
 893             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 894                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 895 #endif
 896         if (pmu_kind == PMU_KEYLARGO_BASED)
 897                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 898
 899         return 0;
 900 }
 901
 902 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 903 {
 904         return single_open(file, pmu_options_proc_show, NULL);
 905 }
 906
 907 static ssize_t pmu_options_proc_write(struct file *file,
 908                 const char __user *buffer, size_t count, loff_t *pos)
 909 {
 910         char tmp[33];
 911         char *label, *val;
 912         size_t fcount = count;
 913
 914         if (!count)
 915                 return -EINVAL;
 916         if (count > 32)
 917                 count = 32;
 918         if (copy_from_user(tmp, buffer, count))
 919                 return -EFAULT;
 920         tmp[count] = 0;
 921
 922         label = tmp;
 923         while(*label == ' ')
 924                 label++;
 925         val = label;
 926         while(*val && (*val != '=')) {
 927                 if (*val == ' ')
 928                         *val = 0;
 929                 val++;
 930         }
 931         if ((*val) == 0)
 932                 return -EINVAL;
 933         *(val++) = 0;
 934         while(*val == ' ')
 935                 val++;
 936 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 937         if (pmu_kind == PMU_KEYLARGO_BASED &&
 938             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 939                 if (!strcmp(label, "lid_wakeup"))
 940                         option_lid_wakeup = ((*val) == '1');
 941 #endif
 942         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 943                 int new_value;
 944                 new_value = ((*val) == '1');
 945                 if (new_value != option_server_mode)
 946                         pmu_set_server_mode(new_value);
 947         }
 948         return fcount;
 949 }
 950
 951 static const struct file_operations pmu_options_proc_fops = {
 952         .owner          = THIS_MODULE,
 953         .open           = pmu_options_proc_open,
 954         .read           = seq_read,
 955         .llseek         = seq_lseek,
 956         .release        = single_release,
 957         .write          = pmu_options_proc_write,
 958 };
 959
 960 #ifdef CONFIG_ADB
 961 /* Send an ADB command */
 962 static int pmu_send_request(struct adb_request *req, int sync)
 963 {
 964         int i, ret;
 965
 966         if ((vias == NULL) || (!pmu_fully_inited)) {
 967                 req->complete = 1;
 968                 return -ENXIO;
 969         }
 970
 971         ret = -EINVAL;
 972
 973         switch (req->data[0]) {
 974         case PMU_PACKET:
 975                 for (i = 0; i < req->nbytes - 1; ++i)
 976                         req->data[i] = req->data[i+1];
 977                 --req->nbytes;
 978                 if (pmu_data_len[req->data[0]][1] != 0) {
 979                         req->reply[0] = ADB_RET_OK;
 980                         req->reply_len = 1;
 981                 } else
 982                         req->reply_len = 0;
 983                 ret = pmu_queue_request(req);
 984                 break;
 985         case CUDA_PACKET:
 986                 switch (req->data[1]) {
 987                 case CUDA_GET_TIME:
 988                         if (req->nbytes != 2)
 989                                 break;
 990                         req->data[0] = PMU_READ_RTC;
 991                         req->nbytes = 1;
 992                         req->reply_len = 3;
 993                         req->reply[0] = CUDA_PACKET;
 994                         req->reply[1] = 0;
 995                         req->reply[2] = CUDA_GET_TIME;
 996                         ret = pmu_queue_request(req);
 997                         break;
 998                 case CUDA_SET_TIME:
 999                         if (req->nbytes != 6)
1000                                 break;
1001                         req->data[0] = PMU_SET_RTC;
1002                         req->nbytes = 5;
1003                         for (i = 1; i <= 4; ++i)
1004                                 req->data[i] = req->data[i+1];
1005                         req->reply_len = 3;
1006                         req->reply[0] = CUDA_PACKET;
1007                         req->reply[1] = 0;
1008                         req->reply[2] = CUDA_SET_TIME;
1009                         ret = pmu_queue_request(req);
1010                         break;
1011                 }
1012                 break;
1013         case ADB_PACKET:
1014                 if (!pmu_has_adb)
1015                         return -ENXIO;
1016                 for (i = req->nbytes - 1; i > 1; --i)
1017                         req->data[i+2] = req->data[i];
1018                 req->data[3] = req->nbytes - 2;
1019                 req->data[2] = pmu_adb_flags;
1020                 /*req->data[1] = req->data[1];*/
1021                 req->data[0] = PMU_ADB_CMD;
1022                 req->nbytes += 2;
1023                 req->reply_expected = 1;
1024                 req->reply_len = 0;
1025                 ret = pmu_queue_request(req);
1026                 break;
1027         }
1028         if (ret) {
1029                 req->complete = 1;
1030                 return ret;
1031         }
1032
1033         if (sync)
1034                 while (!req->complete)
1035                         pmu_poll();
1036
1037         return 0;
1038 }
1039
1040 /* Enable/disable autopolling */
1041 static int __pmu_adb_autopoll(int devs)
1042 {
1043         struct adb_request req;
1044
1045         if (devs) {
1046                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1047                             adb_dev_map >> 8, adb_dev_map);
1048                 pmu_adb_flags = 2;
1049         } else {
1050                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1051                 pmu_adb_flags = 0;
1052         }
1053         while (!req.complete)
1054                 pmu_poll();
1055         return 0;
1056 }
1057
1058 static int pmu_adb_autopoll(int devs)
1059 {
1060         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1061                 return -ENXIO;
1062
1063         adb_dev_map = devs;
1064         return __pmu_adb_autopoll(devs);
1065 }
1066
1067 /* Reset the ADB bus */
1068 static int pmu_adb_reset_bus(void)
1069 {
1070         struct adb_request req;
1071         int save_autopoll = adb_dev_map;
1072
1073         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1074                 return -ENXIO;
1075
1076         /* anyone got a better idea?? */
1077         __pmu_adb_autopoll(0);
1078
1079         req.nbytes = 4;
1080         req.done = NULL;
1081         req.data[0] = PMU_ADB_CMD;
1082         req.data[1] = ADB_BUSRESET;
1083         req.data[2] = 0;
1084         req.data[3] = 0;
1085         req.data[4] = 0;
1086         req.reply_len = 0;
1087         req.reply_expected = 1;
1088         if (pmu_queue_request(&req) != 0) {
1089                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1090                 return -EIO;
1091         }
1092         pmu_wait_complete(&req);
1093
1094         if (save_autopoll != 0)
1095                 __pmu_adb_autopoll(save_autopoll);
1096
1097         return 0;
1098 }
1099 #endif /* CONFIG_ADB */
1100
1101 /* Construct and send a pmu request */
1102 int
1103 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1104             int nbytes, ...)
1105 {
1106         va_list list;
1107         int i;
1108
1109         if (vias == NULL)
1110                 return -ENXIO;
1111
1112         if (nbytes < 0 || nbytes > 32) {
1113                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1114                 req->complete = 1;
1115                 return -EINVAL;
1116         }
1117         req->nbytes = nbytes;
1118         req->done = done;
1119         va_start(list, nbytes);
1120         for (i = 0; i < nbytes; ++i)
1121                 req->data[i] = va_arg(list, int);
1122         va_end(list);
1123         req->reply_len = 0;
1124         req->reply_expected = 0;
1125         return pmu_queue_request(req);
1126 }
1127
1128 int
1129 pmu_queue_request(struct adb_request *req)
1130 {
1131         unsigned long flags;
1132         int nsend;
1133
1134         if (via == NULL) {
1135                 req->complete = 1;
1136                 return -ENXIO;
1137         }
1138         if (req->nbytes <= 0) {
1139                 req->complete = 1;
1140                 return 0;
1141         }
1142         nsend = pmu_data_len[req->data[0]][0];
1143         if (nsend >= 0 && req->nbytes != nsend + 1) {
1144                 req->complete = 1;
1145                 return -EINVAL;
1146         }
1147
1148         req->next = NULL;
1149         req->sent = 0;
1150         req->complete = 0;
1151
1152         spin_lock_irqsave(&pmu_lock, flags);
1153         if (current_req != 0) {
1154                 last_req->next = req;
1155                 last_req = req;
1156         } else {
1157                 current_req = req;
1158                 last_req = req;
1159                 if (pmu_state == idle)
1160                         pmu_start();
1161         }
1162         spin_unlock_irqrestore(&pmu_lock, flags);
1163
1164         return 0;
1165 }
1166
1167 static inline void
1168 wait_for_ack(void)
1169 {
1170         /* Sightly increased the delay, I had one occurrence of the message
1171          * reported
1172          */
1173         int timeout = 4000;
1174         while ((in_8(&via[B]) & TACK) == 0) {
1175                 if (--timeout < 0) {
1176                         printk(KERN_ERR "PMU not responding (!ack)\n");
1177                         return;
1178                 }
1179                 udelay(10);
1180         }
1181 }
1182
1183 /* New PMU seems to be very sensitive to those timings, so we make sure
1184  * PCI is flushed immediately */
1185 static inline void
1186 send_byte(int x)
1187 {
1188         volatile unsigned char __iomem *v = via;
1189
1190         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1191         out_8(&v[SR], x);
1192         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1193         (void)in_8(&v[B]);
1194 }
1195
1196 static inline void
1197 recv_byte(void)
1198 {
1199         volatile unsigned char __iomem *v = via;
1200
1201         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1202         in_8(&v[SR]);           /* resets SR */
1203         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1204         (void)in_8(&v[B]);
1205 }
1206
1207 static inline void
1208 pmu_done(struct adb_request *req)
1209 {
1210         void (*done)(struct adb_request *) = req->done;
1211         mb();
1212         req->complete = 1;
1213         /* Here, we assume that if the request has a done member, the
1214          * struct request will survive to setting req->complete to 1
1215          */
1216         if (done)
1217                 (*done)(req);
1218 }
1219
1220 static void
1221 pmu_start(void)
1222 {
1223         struct adb_request *req;
1224
1225         /* assert pmu_state == idle */
1226         /* get the packet to send */
1227         req = current_req;
1228         if (req == 0 || pmu_state != idle
1229             || (/*req->reply_expected && */req_awaiting_reply))
1230                 return;
1231
1232         pmu_state = sending;
1233         data_index = 1;
1234         data_len = pmu_data_len[req->data[0]][0];
1235
1236         /* Sounds safer to make sure ACK is high before writing. This helped
1237          * kill a problem with ADB and some iBooks
1238          */
1239         wait_for_ack();
1240         /* set the shift register to shift out and send a byte */
1241         send_byte(req->data[0]);
1242 }
1243
1244 void
1245 pmu_poll(void)
1246 {
1247         if (!via)
1248                 return;
1249         if (disable_poll)
1250                 return;
1251         via_pmu_interrupt(0, NULL);
1252 }
1253
1254 void
1255 pmu_poll_adb(void)
1256 {
1257         if (!via)
1258                 return;
1259         if (disable_poll)
1260                 return;
1261         /* Kicks ADB read when PMU is suspended */
1262         adb_int_pending = 1;
1263         do {
1264                 via_pmu_interrupt(0, NULL);
1265         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1266                 || req_awaiting_reply));
1267 }
1268
1269 void
1270 pmu_wait_complete(struct adb_request *req)
1271 {
1272         if (!via)
1273                 return;
1274         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1275                 via_pmu_interrupt(0, NULL);
1276 }
1277
1278 /* This function loops until the PMU is idle and prevents it from
1279  * anwsering to ADB interrupts. pmu_request can still be called.
1280  * This is done to avoid spurrious shutdowns when we know we'll have
1281  * interrupts switched off for a long time
1282  */
1283 void
1284 pmu_suspend(void)
1285 {
1286         unsigned long flags;
1287
1288         if (!via)
1289                 return;
1290
1291         spin_lock_irqsave(&pmu_lock, flags);
1292         pmu_suspended++;
1293         if (pmu_suspended > 1) {
1294                 spin_unlock_irqrestore(&pmu_lock, flags);
1295                 return;
1296         }
1297
1298         do {
1299                 spin_unlock_irqrestore(&pmu_lock, flags);
1300                 if (req_awaiting_reply)
1301                         adb_int_pending = 1;
1302                 via_pmu_interrupt(0, NULL);
1303                 spin_lock_irqsave(&pmu_lock, flags);
1304                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1305                         if (gpio_irq >= 0)
1306                                 disable_irq_nosync(gpio_irq);
1307                         out_8(&via[IER], CB1_INT | IER_CLR);
1308                         spin_unlock_irqrestore(&pmu_lock, flags);
1309                         break;
1310                 }
1311         } while (1);
1312 }
1313
1314 void
1315 pmu_resume(void)
1316 {
1317         unsigned long flags;
1318
1319         if (!via || (pmu_suspended < 1))
1320                 return;
1321
1322         spin_lock_irqsave(&pmu_lock, flags);
1323         pmu_suspended--;
1324         if (pmu_suspended > 0) {
1325                 spin_unlock_irqrestore(&pmu_lock, flags);
1326                 return;
1327         }
1328         adb_int_pending = 1;
1329         if (gpio_irq >= 0)
1330                 enable_irq(gpio_irq);
1331         out_8(&via[IER], CB1_INT | IER_SET);
1332         spin_unlock_irqrestore(&pmu_lock, flags);
1333         pmu_poll();
1334 }
1335
1336 /* Interrupt data could be the result data from an ADB cmd */
1337 static void
1338 pmu_handle_data(unsigned char *data, int len)
1339 {
1340         unsigned char ints, pirq;
1341         int i = 0;
1342
1343         asleep = 0;
1344         if (drop_interrupts || len < 1) {
1345                 adb_int_pending = 0;
1346                 pmu_irq_stats[8]++;
1347                 return;
1348         }
1349
1350         /* Get PMU interrupt mask */
1351         ints = data[0];
1352
1353         /* Record zero interrupts for stats */
1354         if (ints == 0)
1355                 pmu_irq_stats[9]++;
1356
1357         /* Hack to deal with ADB autopoll flag */
1358         if (ints & PMU_INT_ADB)
1359                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1360
1361 next:
1362
1363         if (ints == 0) {
1364                 if (i > pmu_irq_stats[10])
1365                         pmu_irq_stats[10] = i;
1366                 return;
1367         }
1368
1369         for (pirq = 0; pirq < 8; pirq++)
1370                 if (ints & (1 << pirq))
1371                         break;
1372         pmu_irq_stats[pirq]++;
1373         i++;
1374         ints &= ~(1 << pirq);
1375
1376         /* Note: for some reason, we get an interrupt with len=1,
1377          * data[0]==0 after each normal ADB interrupt, at least
1378          * on the Pismo. Still investigating...  --BenH
1379          */
1380         if ((1 << pirq) & PMU_INT_ADB) {
1381                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1382                         struct adb_request *req = req_awaiting_reply;
1383                         if (req == 0) {
1384                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1385                                 return;
1386                         }
1387                         req_awaiting_reply = NULL;
1388                         if (len <= 2)
1389                                 req->reply_len = 0;
1390                         else {
1391                                 memcpy(req->reply, data + 1, len - 1);
1392                                 req->reply_len = len - 1;
1393                         }
1394                         pmu_done(req);
1395                 } else {
1396                         if (len == 4 && data[1] == 0x2c) {
1397                                 extern int xmon_wants_key, xmon_adb_keycode;
1398                                 if (xmon_wants_key) {
1399                                         xmon_adb_keycode = data[2];
1400                                         return;
1401                                 }
1402                         }
1403 #ifdef CONFIG_ADB
1404                         /*
1405                          * XXX On the [23]400 the PMU gives us an up
1406                          * event for keycodes 0x74 or 0x75 when the PC
1407                          * card eject buttons are released, so we
1408                          * ignore those events.
1409                          */
1410                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1411                               && data[1] == 0x2c && data[3] == 0xff
1412                               && (data[2] & ~1) == 0xf4))
1413                                 adb_input(data+1, len-1, 1);
1414 #endif /* CONFIG_ADB */
1415                 }
1416         }
1417         /* Sound/brightness button pressed */
1418         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1419 #ifdef CONFIG_PMAC_BACKLIGHT
1420                 if (len == 3)
1421                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1422 #endif
1423         }
1424         /* Tick interrupt */
1425         else if ((1 << pirq) & PMU_INT_TICK) {
1426                 /* Environement or tick interrupt, query batteries */
1427                 if (pmu_battery_count) {
1428                         if ((--query_batt_timer) == 0) {
1429                                 query_battery_state();
1430                                 query_batt_timer = BATTERY_POLLING_COUNT;
1431                         }
1432                 }
1433         }
1434         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1435                 if (pmu_battery_count)
1436                         query_battery_state();
1437                 pmu_pass_intr(data, len);
1438                 /* len == 6 is probably a bad check. But how do I
1439                  * know what PMU versions send what events here? */
1440                 if (len == 6) {
1441                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1442                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1443                 }
1444         } else {
1445                pmu_pass_intr(data, len);
1446         }
1447         goto next;
1448 }
1449
1450 static struct adb_request*
1451 pmu_sr_intr(void)
1452 {
1453         struct adb_request *req;
1454         int bite = 0;
1455
1456         if (via[B] & TREQ) {
1457                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1458                 out_8(&via[IFR], SR_INT);
1459                 return NULL;
1460         }
1461         /* The ack may not yet be low when we get the interrupt */
1462         while ((in_8(&via[B]) & TACK) != 0)
1463                         ;
1464
1465         /* if reading grab the byte, and reset the interrupt */
1466         if (pmu_state == reading || pmu_state == reading_intr)
1467                 bite = in_8(&via[SR]);
1468
1469         /* reset TREQ and wait for TACK to go high */
1470         out_8(&via[B], in_8(&via[B]) | TREQ);
1471         wait_for_ack();
1472
1473         switch (pmu_state) {
1474         case sending:
1475                 req = current_req;
1476                 if (data_len < 0) {
1477                         data_len = req->nbytes - 1;
1478                         send_byte(data_len);
1479                         break;
1480                 }
1481                 if (data_index <= data_len) {
1482                         send_byte(req->data[data_index++]);
1483                         break;
1484                 }
1485                 req->sent = 1;
1486                 data_len = pmu_data_len[req->data[0]][1];
1487                 if (data_len == 0) {
1488                         pmu_state = idle;
1489                         current_req = req->next;
1490                         if (req->reply_expected)
1491                                 req_awaiting_reply = req;
1492                         else
1493                                 return req;
1494                 } else {
1495                         pmu_state = reading;
1496                         data_index = 0;
1497                         reply_ptr = req->reply + req->reply_len;
1498                         recv_byte();
1499                 }
1500                 break;
1501
1502         case intack:
1503                 data_index = 0;
1504                 data_len = -1;
1505                 pmu_state = reading_intr;
1506                 reply_ptr = interrupt_data[int_data_last];
1507                 recv_byte();
1508                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1509                         enable_irq(gpio_irq);
1510                         gpio_irq_enabled = 1;
1511                 }
1512                 break;
1513
1514         case reading:
1515         case reading_intr:
1516                 if (data_len == -1) {
1517                         data_len = bite;
1518                         if (bite > 32)
1519                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1520                 } else if (data_index < 32) {
1521                         reply_ptr[data_index++] = bite;
1522                 }
1523                 if (data_index < data_len) {
1524                         recv_byte();
1525                         break;
1526                 }
1527
1528                 if (pmu_state == reading_intr) {
1529                         pmu_state = idle;
1530                         int_data_state[int_data_last] = int_data_ready;
1531                         interrupt_data_len[int_data_last] = data_len;
1532                 } else {
1533                         req = current_req;
1534                         /*
1535                          * For PMU sleep and freq change requests, we lock the
1536                          * PMU until it's explicitly unlocked. This avoids any
1537                          * spurrious event polling getting in
1538                          */
1539                         current_req = req->next;
1540                         req->reply_len += data_index;
1541                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1542                                 pmu_state = locked;
1543                         else
1544                                 pmu_state = idle;
1545                         return req;
1546                 }
1547                 break;
1548
1549         default:
1550                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1551                        pmu_state);
1552         }
1553         return NULL;
1554 }
1555
1556 static irqreturn_t
1557 via_pmu_interrupt(int irq, void *arg)
1558 {
1559         unsigned long flags;
1560         int intr;
1561         int nloop = 0;
1562         int int_data = -1;
1563         struct adb_request *req = NULL;
1564         int handled = 0;
1565
1566         /* This is a bit brutal, we can probably do better */
1567         spin_lock_irqsave(&pmu_lock, flags);
1568         ++disable_poll;
1569
1570         for (;;) {
1571                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1572                 if (intr == 0)
1573                         break;
1574                 handled = 1;
1575                 if (++nloop > 1000) {
1576                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1577                                "intr=%x, ier=%x pmu_state=%d\n",
1578                                intr, in_8(&via[IER]), pmu_state);
1579                         break;
1580                 }
1581                 out_8(&via[IFR], intr);
1582                 if (intr & CB1_INT) {
1583                         adb_int_pending = 1;
1584                         pmu_irq_stats[0]++;
1585                 }
1586                 if (intr & SR_INT) {
1587                         req = pmu_sr_intr();
1588                         if (req)
1589                                 break;
1590                 }
1591         }
1592
1593 recheck:
1594         if (pmu_state == idle) {
1595                 if (adb_int_pending) {
1596                         if (int_data_state[0] == int_data_empty)
1597                                 int_data_last = 0;
1598                         else if (int_data_state[1] == int_data_empty)
1599                                 int_data_last = 1;
1600                         else
1601                                 goto no_free_slot;
1602                         pmu_state = intack;
1603                         int_data_state[int_data_last] = int_data_fill;
1604                         /* Sounds safer to make sure ACK is high before writing.
1605                          * This helped kill a problem with ADB and some iBooks
1606                          */
1607                         wait_for_ack();
1608                         send_byte(PMU_INT_ACK);
1609                         adb_int_pending = 0;
1610                 } else if (current_req)
1611                         pmu_start();
1612         }
1613 no_free_slot:
1614         /* Mark the oldest buffer for flushing */
1615         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         } else if (int_data_state[int_data_last] == int_data_ready) {
1619                 int_data_state[int_data_last] = int_data_flush;
1620                 int_data = int_data_last;
1621         }
1622         --disable_poll;
1623         spin_unlock_irqrestore(&pmu_lock, flags);
1624
1625         /* Deal with completed PMU requests outside of the lock */
1626         if (req) {
1627                 pmu_done(req);
1628                 req = NULL;
1629         }
1630
1631         /* Deal with interrupt datas outside of the lock */
1632         if (int_data >= 0) {
1633                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1634                 spin_lock_irqsave(&pmu_lock, flags);
1635                 ++disable_poll;
1636                 int_data_state[int_data] = int_data_empty;
1637                 int_data = -1;
1638                 goto recheck;
1639         }
1640
1641         return IRQ_RETVAL(handled);
1642 }
1643
1644 void
1645 pmu_unlock(void)
1646 {
1647         unsigned long flags;
1648
1649         spin_lock_irqsave(&pmu_lock, flags);
1650         if (pmu_state == locked)
1651                 pmu_state = idle;
1652         adb_int_pending = 1;
1653         spin_unlock_irqrestore(&pmu_lock, flags);
1654 }
1655
1656
1657 static irqreturn_t
1658 gpio1_interrupt(int irq, void *arg)
1659 {
1660         unsigned long flags;
1661
1662         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1663                 spin_lock_irqsave(&pmu_lock, flags);
1664                 if (gpio_irq_enabled > 0) {
1665                         disable_irq_nosync(gpio_irq);
1666                         gpio_irq_enabled = 0;
1667                 }
1668                 pmu_irq_stats[1]++;
1669                 adb_int_pending = 1;
1670                 spin_unlock_irqrestore(&pmu_lock, flags);
1671                 via_pmu_interrupt(0, NULL);
1672                 return IRQ_HANDLED;
1673         }
1674         return IRQ_NONE;
1675 }
1676
1677 void
1678 pmu_enable_irled(int on)
1679 {
1680         struct adb_request req;
1681
1682         if (vias == NULL)
1683                 return ;
1684         if (pmu_kind == PMU_KEYLARGO_BASED)
1685                 return ;
1686
1687         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1688             (on ? PMU_POW_ON : PMU_POW_OFF));
1689         pmu_wait_complete(&req);
1690 }
1691
1692 void
1693 pmu_restart(void)
1694 {
1695         struct adb_request req;
1696
1697         if (via == NULL)
1698                 return;
1699
1700         local_irq_disable();
1701
1702         drop_interrupts = 1;
1703
1704         if (pmu_kind != PMU_KEYLARGO_BASED) {
1705                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1706                                                 PMU_INT_TICK );
1707                 while(!req.complete)
1708                         pmu_poll();
1709         }
1710
1711         pmu_request(&req, NULL, 1, PMU_RESET);
1712         pmu_wait_complete(&req);
1713         for (;;)
1714                 ;
1715 }
1716
1717 void
1718 pmu_shutdown(void)
1719 {
1720         struct adb_request req;
1721
1722         if (via == NULL)
1723                 return;
1724
1725         local_irq_disable();
1726
1727         drop_interrupts = 1;
1728
1729         if (pmu_kind != PMU_KEYLARGO_BASED) {
1730                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1731                                                 PMU_INT_TICK );
1732                 pmu_wait_complete(&req);
1733         } else {
1734                 /* Disable server mode on shutdown or we'll just
1735                  * wake up again
1736                  */
1737                 pmu_set_server_mode(0);
1738         }
1739
1740         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1741                     'M', 'A', 'T', 'T');
1742         pmu_wait_complete(&req);
1743         for (;;)
1744                 ;
1745 }
1746
1747 int
1748 pmu_present(void)
1749 {
1750         return via != 0;
1751 }
1752
1753 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1754 /*
1755  * Put the powerbook to sleep.
1756  */
1757
1758 static u32 save_via[8];
1759
1760 static void
1761 save_via_state(void)
1762 {
1763         save_via[0] = in_8(&via[ANH]);
1764         save_via[1] = in_8(&via[DIRA]);
1765         save_via[2] = in_8(&via[B]);
1766         save_via[3] = in_8(&via[DIRB]);
1767         save_via[4] = in_8(&via[PCR]);
1768         save_via[5] = in_8(&via[ACR]);
1769         save_via[6] = in_8(&via[T1CL]);
1770         save_via[7] = in_8(&via[T1CH]);
1771 }
1772 static void
1773 restore_via_state(void)
1774 {
1775         out_8(&via[ANH], save_via[0]);
1776         out_8(&via[DIRA], save_via[1]);
1777         out_8(&via[B], save_via[2]);
1778         out_8(&via[DIRB], save_via[3]);
1779         out_8(&via[PCR], save_via[4]);
1780         out_8(&via[ACR], save_via[5]);
1781         out_8(&via[T1CL], save_via[6]);
1782         out_8(&via[T1CH], save_via[7]);
1783         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1784         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1785         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1786 }
1787
1788 #define GRACKLE_PM      (1<<7)
1789 #define GRACKLE_DOZE    (1<<5)
1790 #define GRACKLE_NAP     (1<<4)
1791 #define GRACKLE_SLEEP   (1<<3)
1792
1793 static int powerbook_sleep_grackle(void)
1794 {
1795         unsigned long save_l2cr;
1796         unsigned short pmcr1;
1797         struct adb_request req;
1798         struct pci_dev *grackle;
1799
1800         grackle = pci_get_bus_and_slot(0, 0);
1801         if (!grackle)
1802                 return -ENODEV;
1803
1804         /* Turn off various things. Darwin does some retry tests here... */
1805         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1806         pmu_wait_complete(&req);
1807         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1808                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1809         pmu_wait_complete(&req);
1810
1811         /* For 750, save backside cache setting and disable it */
1812         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1813
1814         if (!__fake_sleep) {
1815                 /* Ask the PMU to put us to sleep */
1816                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1817                 pmu_wait_complete(&req);
1818         }
1819
1820         /* The VIA is supposed not to be restored correctly*/
1821         save_via_state();
1822         /* We shut down some HW */
1823         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1824
1825         pci_read_config_word(grackle, 0x70, &pmcr1);
1826         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1827         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1828         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1829         pci_write_config_word(grackle, 0x70, pmcr1);
1830
1831         /* Call low-level ASM sleep handler */
1832         if (__fake_sleep)
1833                 mdelay(5000);
1834         else
1835                 low_sleep_handler();
1836
1837         /* We're awake again, stop grackle PM */
1838         pci_read_config_word(grackle, 0x70, &pmcr1);
1839         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1840         pci_write_config_word(grackle, 0x70, pmcr1);
1841
1842         pci_dev_put(grackle);
1843
1844         /* Make sure the PMU is idle */
1845         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1846         restore_via_state();
1847
1848         /* Restore L2 cache */
1849         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1850                 _set_L2CR(save_l2cr);
1851
1852         /* Restore userland MMU context */
1853         switch_mmu_context(NULL, current->active_mm);
1854
1855         /* Power things up */
1856         pmu_unlock();
1857         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1858         pmu_wait_complete(&req);
1859         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1860                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1861         pmu_wait_complete(&req);
1862         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1863                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1864         pmu_wait_complete(&req);
1865
1866         return 0;
1867 }
1868
1869 static int
1870 powerbook_sleep_Core99(void)
1871 {
1872         unsigned long save_l2cr;
1873         unsigned long save_l3cr;
1874         struct adb_request req;
1875
1876         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1877                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1878                 return -ENOSYS;
1879         }
1880
1881         if (num_online_cpus() > 1 || cpu_is_offline(0))
1882                 return -EAGAIN;
1883
1884         /* Stop environment and ADB interrupts */
1885         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1886         pmu_wait_complete(&req);
1887
1888         /* Tell PMU what events will wake us up */
1889         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1890                 0xff, 0xff);
1891         pmu_wait_complete(&req);
1892         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1893                 0, PMU_PWR_WAKEUP_KEY |
1894                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1895         pmu_wait_complete(&req);
1896
1897         /* Save the state of the L2 and L3 caches */
1898         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1899         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1900
1901         if (!__fake_sleep) {
1902                 /* Ask the PMU to put us to sleep */
1903                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1904                 pmu_wait_complete(&req);
1905         }
1906
1907         /* The VIA is supposed not to be restored correctly*/
1908         save_via_state();
1909
1910         /* Shut down various ASICs. There's a chance that we can no longer
1911          * talk to the PMU after this, so I moved it to _after_ sending the
1912          * sleep command to it. Still need to be checked.
1913          */
1914         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1915
1916         /* Call low-level ASM sleep handler */
1917         if (__fake_sleep)
1918                 mdelay(5000);
1919         else
1920                 low_sleep_handler();
1921
1922         /* Restore Apple core ASICs state */
1923         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1924
1925         /* Restore VIA */
1926         restore_via_state();
1927
1928         /* tweak LPJ before cpufreq is there */
1929         loops_per_jiffy *= 2;
1930
1931         /* Restore video */
1932         pmac_call_early_video_resume();
1933
1934         /* Restore L2 cache */
1935         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1936                 _set_L2CR(save_l2cr);
1937         /* Restore L3 cache */
1938         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1939                 _set_L3CR(save_l3cr);
1940
1941         /* Restore userland MMU context */
1942         switch_mmu_context(NULL, current->active_mm);
1943
1944         /* Tell PMU we are ready */
1945         pmu_unlock();
1946         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1947         pmu_wait_complete(&req);
1948         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1949         pmu_wait_complete(&req);
1950
1951         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1952         loops_per_jiffy /= 2;
1953
1954         return 0;
1955 }
1956
1957 #define PB3400_MEM_CTRL         0xf8000000
1958 #define PB3400_MEM_CTRL_SLEEP   0x70
1959
1960 static void __iomem *pb3400_mem_ctrl;
1961
1962 static void powerbook_sleep_init_3400(void)
1963 {
1964         /* map in the memory controller registers */
1965         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1966         if (pb3400_mem_ctrl == NULL)
1967                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1968 }
1969
1970 static int powerbook_sleep_3400(void)
1971 {
1972         int i, x;
1973         unsigned int hid0;
1974         unsigned long msr;
1975         struct adb_request sleep_req;
1976         unsigned int __iomem *mem_ctrl_sleep;
1977
1978         if (pb3400_mem_ctrl == NULL)
1979                 return -ENOMEM;
1980         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1981
1982         /* Set the memory controller to keep the memory refreshed
1983            while we're asleep */
1984         for (i = 0x403f; i >= 0x4000; --i) {
1985                 out_be32(mem_ctrl_sleep, i);
1986                 do {
1987                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1988                 } while (x == 0);
1989                 if (x >= 0x100)
1990                         break;
1991         }
1992
1993         /* Ask the PMU to put us to sleep */
1994         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1995         pmu_wait_complete(&sleep_req);
1996         pmu_unlock();
1997
1998         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1999
2000         asleep = 1;
2001
2002         /* Put the CPU into sleep mode */
2003         hid0 = mfspr(SPRN_HID0);
2004         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2005         mtspr(SPRN_HID0, hid0);
2006         local_irq_enable();
2007         msr = mfmsr() | MSR_POW;
2008         while (asleep) {
2009                 mb();
2010                 mtmsr(msr);
2011                 isync();
2012         }
2013         local_irq_disable();
2014
2015         /* OK, we're awake again, start restoring things */
2016         out_be32(mem_ctrl_sleep, 0x3f);
2017         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2018
2019         return 0;
2020 }
2021
2022 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2023
2024 /*
2025  * Support for /dev/pmu device
2026  */
2027 #define RB_SIZE         0x10
2028 struct pmu_private {
2029         struct list_head list;
2030         int     rb_get;
2031         int     rb_put;
2032         struct rb_entry {
2033                 unsigned short len;
2034                 unsigned char data[16];
2035         }       rb_buf[RB_SIZE];
2036         wait_queue_head_t wait;
2037         spinlock_t lock;
2038 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2039         int     backlight_locker;
2040 #endif
2041 };
2042
2043 static LIST_HEAD(all_pmu_pvt);
2044 static DEFINE_SPINLOCK(all_pvt_lock);
2045
2046 static void
2047 pmu_pass_intr(unsigned char *data, int len)
2048 {
2049         struct pmu_private *pp;
2050         struct list_head *list;
2051         int i;
2052         unsigned long flags;
2053
2054         if (len > sizeof(pp->rb_buf[0].data))
2055                 len = sizeof(pp->rb_buf[0].data);
2056         spin_lock_irqsave(&all_pvt_lock, flags);
2057         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2058                 pp = list_entry(list, struct pmu_private, list);
2059                 spin_lock(&pp->lock);
2060                 i = pp->rb_put + 1;
2061                 if (i >= RB_SIZE)
2062                         i = 0;
2063                 if (i != pp->rb_get) {
2064                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2065                         rp->len = len;
2066                         memcpy(rp->data, data, len);
2067                         pp->rb_put = i;
2068                         wake_up_interruptible(&pp->wait);
2069                 }
2070                 spin_unlock(&pp->lock);
2071         }
2072         spin_unlock_irqrestore(&all_pvt_lock, flags);
2073 }
2074
2075 static int
2076 pmu_open(struct inode *inode, struct file *file)
2077 {
2078         struct pmu_private *pp;
2079         unsigned long flags;
2080
2081         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2082         if (pp == 0)
2083                 return -ENOMEM;
2084         pp->rb_get = pp->rb_put = 0;
2085         spin_lock_init(&pp->lock);
2086         init_waitqueue_head(&pp->wait);
2087         mutex_lock(&pmu_info_proc_mutex);
2088         spin_lock_irqsave(&all_pvt_lock, flags);
2089 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2090         pp->backlight_locker = 0;
2091 #endif
2092         list_add(&pp->list, &all_pmu_pvt);
2093         spin_unlock_irqrestore(&all_pvt_lock, flags);
2094         file->private_data = pp;
2095         mutex_unlock(&pmu_info_proc_mutex);
2096         return 0;
2097 }
2098
2099 static ssize_t
2100 pmu_read(struct file *file, char __user *buf,
2101                         size_t count, loff_t *ppos)
2102 {
2103         struct pmu_private *pp = file->private_data;
2104         DECLARE_WAITQUEUE(wait, current);
2105         unsigned long flags;
2106         int ret = 0;
2107
2108         if (count < 1 || pp == 0)
2109                 return -EINVAL;
2110         if (!access_ok(VERIFY_WRITE, buf, count))
2111                 return -EFAULT;
2112
2113         spin_lock_irqsave(&pp->lock, flags);
2114         add_wait_queue(&pp->wait, &wait);
2115         set_current_state(TASK_INTERRUPTIBLE);
2116
2117         for (;;) {
2118                 ret = -EAGAIN;
2119                 if (pp->rb_get != pp->rb_put) {
2120                         int i = pp->rb_get;
2121                         struct rb_entry *rp = &pp->rb_buf[i];
2122                         ret = rp->len;
2123                         spin_unlock_irqrestore(&pp->lock, flags);
2124                         if (ret > count)
2125                                 ret = count;
2126                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2127                                 ret = -EFAULT;
2128                         if (++i >= RB_SIZE)
2129                                 i = 0;
2130                         spin_lock_irqsave(&pp->lock, flags);
2131                         pp->rb_get = i;
2132                 }
2133                 if (ret >= 0)
2134                         break;
2135                 if (file->f_flags & O_NONBLOCK)
2136                         break;
2137                 ret = -ERESTARTSYS;
2138                 if (signal_pending(current))
2139                         break;
2140                 spin_unlock_irqrestore(&pp->lock, flags);
2141                 schedule();
2142                 spin_lock_irqsave(&pp->lock, flags);
2143         }
2144         __set_current_state(TASK_RUNNING);
2145         remove_wait_queue(&pp->wait, &wait);
2146         spin_unlock_irqrestore(&pp->lock, flags);
2147
2148         return ret;
2149 }
2150
2151 static ssize_t
2152 pmu_write(struct file *file, const char __user *buf,
2153                          size_t count, loff_t *ppos)
2154 {
2155         return 0;
2156 }
2157
2158 static unsigned int
2159 pmu_fpoll(struct file *filp, poll_table *wait)
2160 {
2161         struct pmu_private *pp = filp->private_data;
2162         unsigned int mask = 0;
2163         unsigned long flags;
2164
2165         if (pp == 0)
2166                 return 0;
2167         poll_wait(filp, &pp->wait, wait);
2168         spin_lock_irqsave(&pp->lock, flags);
2169         if (pp->rb_get != pp->rb_put)
2170                 mask |= POLLIN;
2171         spin_unlock_irqrestore(&pp->lock, flags);
2172         return mask;
2173 }
2174
2175 static int
2176 pmu_release(struct inode *inode, struct file *file)
2177 {
2178         struct pmu_private *pp = file->private_data;
2179         unsigned long flags;
2180
2181         if (pp != 0) {
2182                 file->private_data = NULL;
2183                 spin_lock_irqsave(&all_pvt_lock, flags);
2184                 list_del(&pp->list);
2185                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2186
2187 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2188                 if (pp->backlight_locker)
2189                         pmac_backlight_enable();
2190 #endif
2191
2192                 kfree(pp);
2193         }
2194         return 0;
2195 }
2196
2197 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2198 static void pmac_suspend_disable_irqs(void)
2199 {
2200         /* Call platform functions marked "on sleep" */
2201         pmac_pfunc_i2c_suspend();
2202         pmac_pfunc_base_suspend();
2203 }
2204
2205 static int powerbook_sleep(suspend_state_t state)
2206 {
2207         int error = 0;
2208
2209         /* Wait for completion of async requests */
2210         while (!batt_req.complete)
2211                 pmu_poll();
2212
2213         /* Giveup the lazy FPU & vec so we don't have to back them
2214          * up from the low level code
2215          */
2216         enable_kernel_fp();
2217
2218 #ifdef CONFIG_ALTIVEC
2219         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2220                 enable_kernel_altivec();
2221 #endif /* CONFIG_ALTIVEC */
2222
2223         switch (pmu_kind) {
2224         case PMU_OHARE_BASED:
2225                 error = powerbook_sleep_3400();
2226                 break;
2227         case PMU_HEATHROW_BASED:
2228         case PMU_PADDINGTON_BASED:
2229                 error = powerbook_sleep_grackle();
2230                 break;
2231         case PMU_KEYLARGO_BASED:
2232                 error = powerbook_sleep_Core99();
2233                 break;
2234         default:
2235                 return -ENOSYS;
2236         }
2237
2238         if (error)
2239                 return error;
2240
2241         mdelay(100);
2242
2243         return 0;
2244 }
2245
2246 static void pmac_suspend_enable_irqs(void)
2247 {
2248         /* Force a poll of ADB interrupts */
2249         adb_int_pending = 1;
2250         via_pmu_interrupt(0, NULL);
2251
2252         mdelay(10);
2253
2254         /* Call platform functions marked "on wake" */
2255         pmac_pfunc_base_resume();
2256         pmac_pfunc_i2c_resume();
2257 }
2258
2259 static int pmu_sleep_valid(suspend_state_t state)
2260 {
2261         return state == PM_SUSPEND_MEM
2262                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2263 }
2264
2265 static const struct platform_suspend_ops pmu_pm_ops = {
2266         .enter = powerbook_sleep,
2267         .valid = pmu_sleep_valid,
2268 };
2269
2270 static int register_pmu_pm_ops(void)
2271 {
2272         if (pmu_kind == PMU_OHARE_BASED)
2273                 powerbook_sleep_init_3400();
2274         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2275         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2276         suspend_set_ops(&pmu_pm_ops);
2277
2278         return 0;
2279 }
2280
2281 device_initcall(register_pmu_pm_ops);
2282 #endif
2283
2284 static int pmu_ioctl(struct file *filp,
2285                      u_int cmd, u_long arg)
2286 {
2287         __u32 __user *argp = (__u32 __user *)arg;
2288         int error = -EINVAL;
2289
2290         switch (cmd) {
2291         case PMU_IOC_SLEEP:
2292                 if (!capable(CAP_SYS_ADMIN))
2293                         return -EACCES;
2294                 return pm_suspend(PM_SUSPEND_MEM);
2295         case PMU_IOC_CAN_SLEEP:
2296                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2297                         return put_user(0, argp);
2298                 else
2299                         return put_user(1, argp);
2300
2301 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2302         /* Compatibility ioctl's for backlight */
2303         case PMU_IOC_GET_BACKLIGHT:
2304         {
2305                 int brightness;
2306
2307                 brightness = pmac_backlight_get_legacy_brightness();
2308                 if (brightness < 0)
2309                         return brightness;
2310                 else
2311                         return put_user(brightness, argp);
2312
2313         }
2314         case PMU_IOC_SET_BACKLIGHT:
2315         {
2316                 int brightness;
2317
2318                 error = get_user(brightness, argp);
2319                 if (error)
2320                         return error;
2321
2322                 return pmac_backlight_set_legacy_brightness(brightness);
2323         }
2324 #ifdef CONFIG_INPUT_ADBHID
2325         case PMU_IOC_GRAB_BACKLIGHT: {
2326                 struct pmu_private *pp = filp->private_data;
2327
2328                 if (pp->backlight_locker)
2329                         return 0;
2330
2331                 pp->backlight_locker = 1;
2332                 pmac_backlight_disable();
2333
2334                 return 0;
2335         }
2336 #endif /* CONFIG_INPUT_ADBHID */
2337 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2338
2339         case PMU_IOC_GET_MODEL:
2340                 return put_user(pmu_kind, argp);
2341         case PMU_IOC_HAS_ADB:
2342                 return put_user(pmu_has_adb, argp);
2343         }
2344         return error;
2345 }
2346
2347 static long pmu_unlocked_ioctl(struct file *filp,
2348                                u_int cmd, u_long arg)
2349 {
2350         int ret;
2351
2352         mutex_lock(&pmu_info_proc_mutex);
2353         ret = pmu_ioctl(filp, cmd, arg);
2354         mutex_unlock(&pmu_info_proc_mutex);
2355
2356         return ret;
2357 }
2358
2359 #ifdef CONFIG_COMPAT
2360 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2361 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2362 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2363 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2364 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2365 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2366
2367 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2368 {
2369         switch (cmd) {
2370         case PMU_IOC_SLEEP:
2371                 break;
2372         case PMU_IOC_GET_BACKLIGHT32:
2373                 cmd = PMU_IOC_GET_BACKLIGHT;
2374                 break;
2375         case PMU_IOC_SET_BACKLIGHT32:
2376                 cmd = PMU_IOC_SET_BACKLIGHT;
2377                 break;
2378         case PMU_IOC_GET_MODEL32:
2379                 cmd = PMU_IOC_GET_MODEL;
2380                 break;
2381         case PMU_IOC_HAS_ADB32:
2382                 cmd = PMU_IOC_HAS_ADB;
2383                 break;
2384         case PMU_IOC_CAN_SLEEP32:
2385                 cmd = PMU_IOC_CAN_SLEEP;
2386                 break;
2387         case PMU_IOC_GRAB_BACKLIGHT32:
2388                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2389                 break;
2390         default:
2391                 return -ENOIOCTLCMD;
2392         }
2393         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2394 }
2395 #endif
2396
2397 static const struct file_operations pmu_device_fops = {
2398         .read           = pmu_read,
2399         .write          = pmu_write,
2400         .poll           = pmu_fpoll,
2401         .unlocked_ioctl = pmu_unlocked_ioctl,
2402 #ifdef CONFIG_COMPAT
2403         .compat_ioctl   = compat_pmu_ioctl,
2404 #endif
2405         .open           = pmu_open,
2406         .release        = pmu_release,
2407         .llseek         = noop_llseek,
2408 };
2409
2410 static struct miscdevice pmu_device = {
2411         PMU_MINOR, "pmu", &pmu_device_fops
2412 };
2413
2414 static int pmu_device_init(void)
2415 {
2416         if (!via)
2417                 return 0;
2418         if (misc_register(&pmu_device) < 0)
2419                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2420         return 0;
2421 }
2422 device_initcall(pmu_device_init);
2423
2424
2425 #ifdef DEBUG_SLEEP
2426 static inline void
2427 polled_handshake(volatile unsigned char __iomem *via)
2428 {
2429         via[B] &= ~TREQ; eieio();
2430         while ((via[B] & TACK) != 0)
2431                 ;
2432         via[B] |= TREQ; eieio();
2433         while ((via[B] & TACK) == 0)
2434                 ;
2435 }
2436
2437 static inline void
2438 polled_send_byte(volatile unsigned char __iomem *via, int x)
2439 {
2440         via[ACR] |= SR_OUT | SR_EXT; eieio();
2441         via[SR] = x; eieio();
2442         polled_handshake(via);
2443 }
2444
2445 static inline int
2446 polled_recv_byte(volatile unsigned char __iomem *via)
2447 {
2448         int x;
2449
2450         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2451         x = via[SR]; eieio();
2452         polled_handshake(via);
2453         x = via[SR]; eieio();
2454         return x;
2455 }
2456
2457 int
2458 pmu_polled_request(struct adb_request *req)
2459 {
2460         unsigned long flags;
2461         int i, l, c;
2462         volatile unsigned char __iomem *v = via;
2463
2464         req->complete = 1;
2465         c = req->data[0];
2466         l = pmu_data_len[c][0];
2467         if (l >= 0 && req->nbytes != l + 1)
2468                 return -EINVAL;
2469
2470         local_irq_save(flags);
2471         while (pmu_state != idle)
2472                 pmu_poll();
2473
2474         while ((via[B] & TACK) == 0)
2475                 ;
2476         polled_send_byte(v, c);
2477         if (l < 0) {
2478                 l = req->nbytes - 1;
2479                 polled_send_byte(v, l);
2480         }
2481         for (i = 1; i <= l; ++i)
2482                 polled_send_byte(v, req->data[i]);
2483
2484         l = pmu_data_len[c][1];
2485         if (l < 0)
2486                 l = polled_recv_byte(v);
2487         for (i = 0; i < l; ++i)
2488                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2489
2490         if (req->done)
2491                 (*req->done)(req);
2492
2493         local_irq_restore(flags);
2494         return 0;
2495 }
2496
2497 /* N.B. This doesn't work on the 3400 */
2498 void pmu_blink(int n)
2499 {
2500         struct adb_request req;
2501
2502         memset(&req, 0, sizeof(req));
2503
2504         for (; n > 0; --n) {
2505                 req.nbytes = 4;
2506                 req.done = NULL;
2507                 req.data[0] = 0xee;
2508                 req.data[1] = 4;
2509                 req.data[2] = 0;
2510                 req.data[3] = 1;
2511                 req.reply[0] = ADB_RET_OK;
2512                 req.reply_len = 1;
2513                 req.reply_expected = 0;
2514                 pmu_polled_request(&req);
2515                 mdelay(50);
2516                 req.nbytes = 4;
2517                 req.done = NULL;
2518                 req.data[0] = 0xee;
2519                 req.data[1] = 4;
2520                 req.data[2] = 0;
2521                 req.data[3] = 0;
2522                 req.reply[0] = ADB_RET_OK;
2523                 req.reply_len = 1;
2524                 req.reply_expected = 0;
2525                 pmu_polled_request(&req);
2526                 mdelay(50);
2527         }
2528         mdelay(50);
2529 }
2530 #endif /* DEBUG_SLEEP */
2531
2532 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2533 int pmu_sys_suspended;
2534
2535 static int pmu_syscore_suspend(void)
2536 {
2537         /* Suspend PMU event interrupts */
2538         pmu_suspend();
2539         pmu_sys_suspended = 1;
2540
2541 #ifdef CONFIG_PMAC_BACKLIGHT
2542         /* Tell backlight code not to muck around with the chip anymore */
2543         pmu_backlight_set_sleep(1);
2544 #endif
2545
2546         return 0;
2547 }
2548
2549 static void pmu_syscore_resume(void)
2550 {
2551         struct adb_request req;
2552
2553         if (!pmu_sys_suspended)
2554                 return;
2555
2556         /* Tell PMU we are ready */
2557         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2558         pmu_wait_complete(&req);
2559
2560 #ifdef CONFIG_PMAC_BACKLIGHT
2561         /* Tell backlight code it can use the chip again */
2562         pmu_backlight_set_sleep(0);
2563 #endif
2564         /* Resume PMU event interrupts */
2565         pmu_resume();
2566         pmu_sys_suspended = 0;
2567 }
2568
2569 static struct syscore_ops pmu_syscore_ops = {
2570         .suspend = pmu_syscore_suspend,
2571         .resume = pmu_syscore_resume,
2572 };
2573
2574 static int pmu_syscore_register(void)
2575 {
2576         register_syscore_ops(&pmu_syscore_ops);
2577
2578         return 0;
2579 }
2580 subsys_initcall(pmu_syscore_register);
2581 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2582
2583 EXPORT_SYMBOL(pmu_request);
2584 EXPORT_SYMBOL(pmu_queue_request);
2585 EXPORT_SYMBOL(pmu_poll);
2586 EXPORT_SYMBOL(pmu_poll_adb);
2587 EXPORT_SYMBOL(pmu_wait_complete);
2588 EXPORT_SYMBOL(pmu_suspend);
2589 EXPORT_SYMBOL(pmu_resume);
2590 EXPORT_SYMBOL(pmu_unlock);
2591 #if defined(CONFIG_PPC32)
2592 EXPORT_SYMBOL(pmu_enable_irled);
2593 EXPORT_SYMBOL(pmu_battery_count);
2594 EXPORT_SYMBOL(pmu_batteries);
2595 EXPORT_SYMBOL(pmu_power_flags);
2596 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2597