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,
 429                                         IRQF_NO_SUSPEND, "GPIO1 ADB",
 430                                         (void *)0))
 431                                 printk(KERN_ERR "pmu: can't get irq %d"
 432                                        " (GPIO1)\n", gpio_irq);
 433                         else
 434                                 gpio_irq_enabled = 1;
 435                 }
 436         }
 437
 438         /* Enable interrupts */
 439         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 440
 441         pmu_fully_inited = 1;
 442
 443         /* Make sure PMU settle down before continuing. This is _very_ important
 444          * since the IDE probe may shut interrupts down for quite a bit of time. If
 445          * a PMU communication is pending while this happens, the PMU may timeout
 446          * Not that on Core99 machines, the PMU keeps sending us environement
 447          * messages, we should find a way to either fix IDE or make it call
 448          * pmu_suspend() before masking interrupts. This can also happens while
 449          * scolling with some fbdevs.
 450          */
 451         do {
 452                 pmu_poll();
 453         } while (pmu_state != idle);
 454
 455         return 0;
 456 }
 457
 458 arch_initcall(via_pmu_start);
 459
 460 /*
 461  * This has to be done after pci_init, which is a subsys_initcall.
 462  */
 463 static int __init via_pmu_dev_init(void)
 464 {
 465         if (vias == NULL)
 466                 return -ENODEV;
 467
 468 #ifdef CONFIG_PMAC_BACKLIGHT
 469         /* Initialize backlight */
 470         pmu_backlight_init();
 471 #endif
 472
 473 #ifdef CONFIG_PPC32
 474         if (of_machine_is_compatible("AAPL,3400/2400") ||
 475                 of_machine_is_compatible("AAPL,3500")) {
 476                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 477                         NULL, PMAC_MB_INFO_MODEL, 0);
 478                 pmu_battery_count = 1;
 479                 if (mb == PMAC_TYPE_COMET)
 480                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 481                 else
 482                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 483         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 484                 of_machine_is_compatible("PowerBook1,1")) {
 485                 pmu_battery_count = 2;
 486                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 487                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 488         } else {
 489                 struct device_node* prim =
 490                         of_find_node_by_name(NULL, "power-mgt");
 491                 const u32 *prim_info = NULL;
 492                 if (prim)
 493                         prim_info = of_get_property(prim, "prim-info", NULL);
 494                 if (prim_info) {
 495                         /* Other stuffs here yet unknown */
 496                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 497                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 498                         if (pmu_battery_count > 1)
 499                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 500                 }
 501                 of_node_put(prim);
 502         }
 503 #endif /* CONFIG_PPC32 */
 504
 505         /* Create /proc/pmu */
 506         proc_pmu_root = proc_mkdir("pmu", NULL);
 507         if (proc_pmu_root) {
 508                 long i;
 509
 510                 for (i=0; i<pmu_battery_count; i++) {
 511                         char title[16];
 512                         sprintf(title, "battery_%ld", i);
 513                         proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 514                                         &pmu_battery_proc_fops, (void *)i);
 515                 }
 516
 517                 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 518                 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 519                                                 &pmu_irqstats_proc_fops);
 520                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 521                                                 &pmu_options_proc_fops);
 522         }
 523         return 0;
 524 }
 525
 526 device_initcall(via_pmu_dev_init);
 527
 528 static int
 529 init_pmu(void)
 530 {
 531         int timeout;
 532         struct adb_request req;
 533
 534         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 535         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 536
 537         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 538         timeout =  100000;
 539         while (!req.complete) {
 540                 if (--timeout < 0) {
 541                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 542                         return 0;
 543                 }
 544                 udelay(10);
 545                 pmu_poll();
 546         }
 547
 548         /* ack all pending interrupts */
 549         timeout = 100000;
 550         interrupt_data[0][0] = 1;
 551         while (interrupt_data[0][0] || pmu_state != idle) {
 552                 if (--timeout < 0) {
 553                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 554                         return 0;
 555                 }
 556                 if (pmu_state == idle)
 557                         adb_int_pending = 1;
 558                 via_pmu_interrupt(0, NULL);
 559                 udelay(10);
 560         }
 561
 562         /* Tell PMU we are ready.  */
 563         if (pmu_kind == PMU_KEYLARGO_BASED) {
 564                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 565                 while (!req.complete)
 566                         pmu_poll();
 567         }
 568
 569         /* Read PMU version */
 570         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 571         pmu_wait_complete(&req);
 572         if (req.reply_len > 0)
 573                 pmu_version = req.reply[0];
 574
 575         /* Read server mode setting */
 576         if (pmu_kind == PMU_KEYLARGO_BASED) {
 577                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 578                             PMU_PWR_GET_POWERUP_EVENTS);
 579                 pmu_wait_complete(&req);
 580                 if (req.reply_len == 2) {
 581                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 582                                 option_server_mode = 1;
 583                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 584                                option_server_mode ? "enabled" : "disabled");
 585                 }
 586         }
 587         return 1;
 588 }
 589
 590 int
 591 pmu_get_model(void)
 592 {
 593         return pmu_kind;
 594 }
 595
 596 static void pmu_set_server_mode(int server_mode)
 597 {
 598         struct adb_request req;
 599
 600         if (pmu_kind != PMU_KEYLARGO_BASED)
 601                 return;
 602
 603         option_server_mode = server_mode;
 604         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 605         pmu_wait_complete(&req);
 606         if (req.reply_len < 2)
 607                 return;
 608         if (server_mode)
 609                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 610                             PMU_PWR_SET_POWERUP_EVENTS,
 611                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 612         else
 613                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 614                             PMU_PWR_CLR_POWERUP_EVENTS,
 615                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 616         pmu_wait_complete(&req);
 617 }
 618
 619 /* This new version of the code for 2400/3400/3500 powerbooks
 620  * is inspired from the implementation in gkrellm-pmu
 621  */
 622 static void
 623 done_battery_state_ohare(struct adb_request* req)
 624 {
 625         /* format:
 626          *  [0]    :  flags
 627          *    0x01 :  AC indicator
 628          *    0x02 :  charging
 629          *    0x04 :  battery exist
 630          *    0x08 :
 631          *    0x10 :
 632          *    0x20 :  full charged
 633          *    0x40 :  pcharge reset
 634          *    0x80 :  battery exist
 635          *
 636          *  [1][2] :  battery voltage
 637          *  [3]    :  CPU temperature
 638          *  [4]    :  battery temperature
 639          *  [5]    :  current
 640          *  [6][7] :  pcharge
 641          *              --tkoba
 642          */
 643         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 644         long pcharge, charge, vb, vmax, lmax;
 645         long vmax_charging, vmax_charged;
 646         long amperage, voltage, time, max;
 647         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 648                         NULL, PMAC_MB_INFO_MODEL, 0);
 649
 650         if (req->reply[0] & 0x01)
 651                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 652         else
 653                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 654
 655         if (mb == PMAC_TYPE_COMET) {
 656                 vmax_charged = 189;
 657                 vmax_charging = 213;
 658                 lmax = 6500;
 659         } else {
 660                 vmax_charged = 330;
 661                 vmax_charging = 330;
 662                 lmax = 6500;
 663         }
 664         vmax = vmax_charged;
 665
 666         /* If battery installed */
 667         if (req->reply[0] & 0x04) {
 668                 bat_flags |= PMU_BATT_PRESENT;
 669                 if (req->reply[0] & 0x02)
 670                         bat_flags |= PMU_BATT_CHARGING;
 671                 vb = (req->reply[1] << 8) | req->reply[2];
 672                 voltage = (vb * 265 + 72665) / 10;
 673                 amperage = req->reply[5];
 674                 if ((req->reply[0] & 0x01) == 0) {
 675                         if (amperage > 200)
 676                                 vb += ((amperage - 200) * 15)/100;
 677                 } else if (req->reply[0] & 0x02) {
 678                         vb = (vb * 97) / 100;
 679                         vmax = vmax_charging;
 680                 }
 681                 charge = (100 * vb) / vmax;
 682                 if (req->reply[0] & 0x40) {
 683                         pcharge = (req->reply[6] << 8) + req->reply[7];
 684                         if (pcharge > lmax)
 685                                 pcharge = lmax;
 686                         pcharge *= 100;
 687                         pcharge = 100 - pcharge / lmax;
 688                         if (pcharge < charge)
 689                                 charge = pcharge;
 690                 }
 691                 if (amperage > 0)
 692                         time = (charge * 16440) / amperage;
 693                 else
 694                         time = 0;
 695                 max = 100;
 696                 amperage = -amperage;
 697         } else
 698                 charge = max = amperage = voltage = time = 0;
 699
 700         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 701         pmu_batteries[pmu_cur_battery].charge = charge;
 702         pmu_batteries[pmu_cur_battery].max_charge = max;
 703         pmu_batteries[pmu_cur_battery].amperage = amperage;
 704         pmu_batteries[pmu_cur_battery].voltage = voltage;
 705         pmu_batteries[pmu_cur_battery].time_remaining = time;
 706
 707         clear_bit(0, &async_req_locks);
 708 }
 709
 710 static void
 711 done_battery_state_smart(struct adb_request* req)
 712 {
 713         /* format:
 714          *  [0] : format of this structure (known: 3,4,5)
 715          *  [1] : flags
 716          *
 717          *  format 3 & 4:
 718          *
 719          *  [2] : charge
 720          *  [3] : max charge
 721          *  [4] : current
 722          *  [5] : voltage
 723          *
 724          *  format 5:
 725          *
 726          *  [2][3] : charge
 727          *  [4][5] : max charge
 728          *  [6][7] : current
 729          *  [8][9] : voltage
 730          */
 731
 732         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 733         int amperage;
 734         unsigned int capa, max, voltage;
 735
 736         if (req->reply[1] & 0x01)
 737                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 738         else
 739                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 740
 741
 742         capa = max = amperage = voltage = 0;
 743
 744         if (req->reply[1] & 0x04) {
 745                 bat_flags |= PMU_BATT_PRESENT;
 746                 switch(req->reply[0]) {
 747                         case 3:
 748                         case 4: capa = req->reply[2];
 749                                 max = req->reply[3];
 750                                 amperage = *((signed char *)&req->reply[4]);
 751                                 voltage = req->reply[5];
 752                                 break;
 753                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 754                                 max = (req->reply[4] << 8) | req->reply[5];
 755                                 amperage = *((signed short *)&req->reply[6]);
 756                                 voltage = (req->reply[8] << 8) | req->reply[9];
 757                                 break;
 758                         default:
 759                                 pr_warn("pmu.c: unrecognized battery info, "
 760                                         "len: %d, %4ph\n", req->reply_len,
 761                                                            req->reply);
 762                                 break;
 763                 }
 764         }
 765
 766         if ((req->reply[1] & 0x01) && (amperage > 0))
 767                 bat_flags |= PMU_BATT_CHARGING;
 768
 769         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 770         pmu_batteries[pmu_cur_battery].charge = capa;
 771         pmu_batteries[pmu_cur_battery].max_charge = max;
 772         pmu_batteries[pmu_cur_battery].amperage = amperage;
 773         pmu_batteries[pmu_cur_battery].voltage = voltage;
 774         if (amperage) {
 775                 if ((req->reply[1] & 0x01) && (amperage > 0))
 776                         pmu_batteries[pmu_cur_battery].time_remaining
 777                                 = ((max-capa) * 3600) / amperage;
 778                 else
 779                         pmu_batteries[pmu_cur_battery].time_remaining
 780                                 = (capa * 3600) / (-amperage);
 781         } else
 782                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 783
 784         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 785
 786         clear_bit(0, &async_req_locks);
 787 }
 788
 789 static void
 790 query_battery_state(void)
 791 {
 792         if (test_and_set_bit(0, &async_req_locks))
 793                 return;
 794         if (pmu_kind == PMU_OHARE_BASED)
 795                 pmu_request(&batt_req, done_battery_state_ohare,
 796                         1, PMU_BATTERY_STATE);
 797         else
 798                 pmu_request(&batt_req, done_battery_state_smart,
 799                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 800 }
 801
 802 static int pmu_info_proc_show(struct seq_file *m, void *v)
 803 {
 804         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 805         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 806         seq_printf(m, "AC Power               : %d\n",
 807                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 808         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 809
 810         return 0;
 811 }
 812
 813 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 814 {
 815         return single_open(file, pmu_info_proc_show, NULL);
 816 }
 817
 818 static const struct file_operations pmu_info_proc_fops = {
 819         .owner          = THIS_MODULE,
 820         .open           = pmu_info_proc_open,
 821         .read           = seq_read,
 822         .llseek         = seq_lseek,
 823         .release        = single_release,
 824 };
 825
 826 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 827 {
 828         int i;
 829         static const char *irq_names[] = {
 830                 "Total CB1 triggered events",
 831                 "Total GPIO1 triggered events",
 832                 "PC-Card eject button",
 833                 "Sound/Brightness button",
 834                 "ADB message",
 835                 "Battery state change",
 836                 "Environment interrupt",
 837                 "Tick timer",
 838                 "Ghost interrupt (zero len)",
 839                 "Empty interrupt (empty mask)",
 840                 "Max irqs in a row"
 841         };
 842
 843         for (i=0; i<11; i++) {
 844                 seq_printf(m, " %2u: %10u (%s)\n",
 845                              i, pmu_irq_stats[i], irq_names[i]);
 846         }
 847         return 0;
 848 }
 849
 850 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 851 {
 852         return single_open(file, pmu_irqstats_proc_show, NULL);
 853 }
 854
 855 static const struct file_operations pmu_irqstats_proc_fops = {
 856         .owner          = THIS_MODULE,
 857         .open           = pmu_irqstats_proc_open,
 858         .read           = seq_read,
 859         .llseek         = seq_lseek,
 860         .release        = single_release,
 861 };
 862
 863 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 864 {
 865         long batnum = (long)m->private;
 866
 867         seq_putc(m, '\n');
 868         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 869         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 870         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 871         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 872         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 873         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 874         return 0;
 875 }
 876
 877 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 878 {
 879         return single_open(file, pmu_battery_proc_show, PDE_DATA(inode));
 880 }
 881
 882 static const struct file_operations pmu_battery_proc_fops = {
 883         .owner          = THIS_MODULE,
 884         .open           = pmu_battery_proc_open,
 885         .read           = seq_read,
 886         .llseek         = seq_lseek,
 887         .release        = single_release,
 888 };
 889
 890 static int pmu_options_proc_show(struct seq_file *m, void *v)
 891 {
 892 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 893         if (pmu_kind == PMU_KEYLARGO_BASED &&
 894             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 895                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 896 #endif
 897         if (pmu_kind == PMU_KEYLARGO_BASED)
 898                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 899
 900         return 0;
 901 }
 902
 903 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 904 {
 905         return single_open(file, pmu_options_proc_show, NULL);
 906 }
 907
 908 static ssize_t pmu_options_proc_write(struct file *file,
 909                 const char __user *buffer, size_t count, loff_t *pos)
 910 {
 911         char tmp[33];
 912         char *label, *val;
 913         size_t fcount = count;
 914
 915         if (!count)
 916                 return -EINVAL;
 917         if (count > 32)
 918                 count = 32;
 919         if (copy_from_user(tmp, buffer, count))
 920                 return -EFAULT;
 921         tmp[count] = 0;
 922
 923         label = tmp;
 924         while(*label == ' ')
 925                 label++;
 926         val = label;
 927         while(*val && (*val != '=')) {
 928                 if (*val == ' ')
 929                         *val = 0;
 930                 val++;
 931         }
 932         if ((*val) == 0)
 933                 return -EINVAL;
 934         *(val++) = 0;
 935         while(*val == ' ')
 936                 val++;
 937 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 938         if (pmu_kind == PMU_KEYLARGO_BASED &&
 939             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 940                 if (!strcmp(label, "lid_wakeup"))
 941                         option_lid_wakeup = ((*val) == '1');
 942 #endif
 943         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 944                 int new_value;
 945                 new_value = ((*val) == '1');
 946                 if (new_value != option_server_mode)
 947                         pmu_set_server_mode(new_value);
 948         }
 949         return fcount;
 950 }
 951
 952 static const struct file_operations pmu_options_proc_fops = {
 953         .owner          = THIS_MODULE,
 954         .open           = pmu_options_proc_open,
 955         .read           = seq_read,
 956         .llseek         = seq_lseek,
 957         .release        = single_release,
 958         .write          = pmu_options_proc_write,
 959 };
 960
 961 #ifdef CONFIG_ADB
 962 /* Send an ADB command */
 963 static int pmu_send_request(struct adb_request *req, int sync)
 964 {
 965         int i, ret;
 966
 967         if ((vias == NULL) || (!pmu_fully_inited)) {
 968                 req->complete = 1;
 969                 return -ENXIO;
 970         }
 971
 972         ret = -EINVAL;
 973
 974         switch (req->data[0]) {
 975         case PMU_PACKET:
 976                 for (i = 0; i < req->nbytes - 1; ++i)
 977                         req->data[i] = req->data[i+1];
 978                 --req->nbytes;
 979                 if (pmu_data_len[req->data[0]][1] != 0) {
 980                         req->reply[0] = ADB_RET_OK;
 981                         req->reply_len = 1;
 982                 } else
 983                         req->reply_len = 0;
 984                 ret = pmu_queue_request(req);
 985                 break;
 986         case CUDA_PACKET:
 987                 switch (req->data[1]) {
 988                 case CUDA_GET_TIME:
 989                         if (req->nbytes != 2)
 990                                 break;
 991                         req->data[0] = PMU_READ_RTC;
 992                         req->nbytes = 1;
 993                         req->reply_len = 3;
 994                         req->reply[0] = CUDA_PACKET;
 995                         req->reply[1] = 0;
 996                         req->reply[2] = CUDA_GET_TIME;
 997                         ret = pmu_queue_request(req);
 998                         break;
 999                 case CUDA_SET_TIME:
1000                         if (req->nbytes != 6)
1001                                 break;
1002                         req->data[0] = PMU_SET_RTC;
1003                         req->nbytes = 5;
1004                         for (i = 1; i <= 4; ++i)
1005                                 req->data[i] = req->data[i+1];
1006                         req->reply_len = 3;
1007                         req->reply[0] = CUDA_PACKET;
1008                         req->reply[1] = 0;
1009                         req->reply[2] = CUDA_SET_TIME;
1010                         ret = pmu_queue_request(req);
1011                         break;
1012                 }
1013                 break;
1014         case ADB_PACKET:
1015                 if (!pmu_has_adb)
1016                         return -ENXIO;
1017                 for (i = req->nbytes - 1; i > 1; --i)
1018                         req->data[i+2] = req->data[i];
1019                 req->data[3] = req->nbytes - 2;
1020                 req->data[2] = pmu_adb_flags;
1021                 /*req->data[1] = req->data[1];*/
1022                 req->data[0] = PMU_ADB_CMD;
1023                 req->nbytes += 2;
1024                 req->reply_expected = 1;
1025                 req->reply_len = 0;
1026                 ret = pmu_queue_request(req);
1027                 break;
1028         }
1029         if (ret) {
1030                 req->complete = 1;
1031                 return ret;
1032         }
1033
1034         if (sync)
1035                 while (!req->complete)
1036                         pmu_poll();
1037
1038         return 0;
1039 }
1040
1041 /* Enable/disable autopolling */
1042 static int __pmu_adb_autopoll(int devs)
1043 {
1044         struct adb_request req;
1045
1046         if (devs) {
1047                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1048                             adb_dev_map >> 8, adb_dev_map);
1049                 pmu_adb_flags = 2;
1050         } else {
1051                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1052                 pmu_adb_flags = 0;
1053         }
1054         while (!req.complete)
1055                 pmu_poll();
1056         return 0;
1057 }
1058
1059 static int pmu_adb_autopoll(int devs)
1060 {
1061         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1062                 return -ENXIO;
1063
1064         adb_dev_map = devs;
1065         return __pmu_adb_autopoll(devs);
1066 }
1067
1068 /* Reset the ADB bus */
1069 static int pmu_adb_reset_bus(void)
1070 {
1071         struct adb_request req;
1072         int save_autopoll = adb_dev_map;
1073
1074         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1075                 return -ENXIO;
1076
1077         /* anyone got a better idea?? */
1078         __pmu_adb_autopoll(0);
1079
1080         req.nbytes = 4;
1081         req.done = NULL;
1082         req.data[0] = PMU_ADB_CMD;
1083         req.data[1] = ADB_BUSRESET;
1084         req.data[2] = 0;
1085         req.data[3] = 0;
1086         req.data[4] = 0;
1087         req.reply_len = 0;
1088         req.reply_expected = 1;
1089         if (pmu_queue_request(&req) != 0) {
1090                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1091                 return -EIO;
1092         }
1093         pmu_wait_complete(&req);
1094
1095         if (save_autopoll != 0)
1096                 __pmu_adb_autopoll(save_autopoll);
1097
1098         return 0;
1099 }
1100 #endif /* CONFIG_ADB */
1101
1102 /* Construct and send a pmu request */
1103 int
1104 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1105             int nbytes, ...)
1106 {
1107         va_list list;
1108         int i;
1109
1110         if (vias == NULL)
1111                 return -ENXIO;
1112
1113         if (nbytes < 0 || nbytes > 32) {
1114                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1115                 req->complete = 1;
1116                 return -EINVAL;
1117         }
1118         req->nbytes = nbytes;
1119         req->done = done;
1120         va_start(list, nbytes);
1121         for (i = 0; i < nbytes; ++i)
1122                 req->data[i] = va_arg(list, int);
1123         va_end(list);
1124         req->reply_len = 0;
1125         req->reply_expected = 0;
1126         return pmu_queue_request(req);
1127 }
1128
1129 int
1130 pmu_queue_request(struct adb_request *req)
1131 {
1132         unsigned long flags;
1133         int nsend;
1134
1135         if (via == NULL) {
1136                 req->complete = 1;
1137                 return -ENXIO;
1138         }
1139         if (req->nbytes <= 0) {
1140                 req->complete = 1;
1141                 return 0;
1142         }
1143         nsend = pmu_data_len[req->data[0]][0];
1144         if (nsend >= 0 && req->nbytes != nsend + 1) {
1145                 req->complete = 1;
1146                 return -EINVAL;
1147         }
1148
1149         req->next = NULL;
1150         req->sent = 0;
1151         req->complete = 0;
1152
1153         spin_lock_irqsave(&pmu_lock, flags);
1154         if (current_req != 0) {
1155                 last_req->next = req;
1156                 last_req = req;
1157         } else {
1158                 current_req = req;
1159                 last_req = req;
1160                 if (pmu_state == idle)
1161                         pmu_start();
1162         }
1163         spin_unlock_irqrestore(&pmu_lock, flags);
1164
1165         return 0;
1166 }
1167
1168 static inline void
1169 wait_for_ack(void)
1170 {
1171         /* Sightly increased the delay, I had one occurrence of the message
1172          * reported
1173          */
1174         int timeout = 4000;
1175         while ((in_8(&via[B]) & TACK) == 0) {
1176                 if (--timeout < 0) {
1177                         printk(KERN_ERR "PMU not responding (!ack)\n");
1178                         return;
1179                 }
1180                 udelay(10);
1181         }
1182 }
1183
1184 /* New PMU seems to be very sensitive to those timings, so we make sure
1185  * PCI is flushed immediately */
1186 static inline void
1187 send_byte(int x)
1188 {
1189         volatile unsigned char __iomem *v = via;
1190
1191         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1192         out_8(&v[SR], x);
1193         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1194         (void)in_8(&v[B]);
1195 }
1196
1197 static inline void
1198 recv_byte(void)
1199 {
1200         volatile unsigned char __iomem *v = via;
1201
1202         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1203         in_8(&v[SR]);           /* resets SR */
1204         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1205         (void)in_8(&v[B]);
1206 }
1207
1208 static inline void
1209 pmu_done(struct adb_request *req)
1210 {
1211         void (*done)(struct adb_request *) = req->done;
1212         mb();
1213         req->complete = 1;
1214         /* Here, we assume that if the request has a done member, the
1215          * struct request will survive to setting req->complete to 1
1216          */
1217         if (done)
1218                 (*done)(req);
1219 }
1220
1221 static void
1222 pmu_start(void)
1223 {
1224         struct adb_request *req;
1225
1226         /* assert pmu_state == idle */
1227         /* get the packet to send */
1228         req = current_req;
1229         if (req == 0 || pmu_state != idle
1230             || (/*req->reply_expected && */req_awaiting_reply))
1231                 return;
1232
1233         pmu_state = sending;
1234         data_index = 1;
1235         data_len = pmu_data_len[req->data[0]][0];
1236
1237         /* Sounds safer to make sure ACK is high before writing. This helped
1238          * kill a problem with ADB and some iBooks
1239          */
1240         wait_for_ack();
1241         /* set the shift register to shift out and send a byte */
1242         send_byte(req->data[0]);
1243 }
1244
1245 void
1246 pmu_poll(void)
1247 {
1248         if (!via)
1249                 return;
1250         if (disable_poll)
1251                 return;
1252         via_pmu_interrupt(0, NULL);
1253 }
1254
1255 void
1256 pmu_poll_adb(void)
1257 {
1258         if (!via)
1259                 return;
1260         if (disable_poll)
1261                 return;
1262         /* Kicks ADB read when PMU is suspended */
1263         adb_int_pending = 1;
1264         do {
1265                 via_pmu_interrupt(0, NULL);
1266         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1267                 || req_awaiting_reply));
1268 }
1269
1270 void
1271 pmu_wait_complete(struct adb_request *req)
1272 {
1273         if (!via)
1274                 return;
1275         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1276                 via_pmu_interrupt(0, NULL);
1277 }
1278
1279 /* This function loops until the PMU is idle and prevents it from
1280  * anwsering to ADB interrupts. pmu_request can still be called.
1281  * This is done to avoid spurrious shutdowns when we know we'll have
1282  * interrupts switched off for a long time
1283  */
1284 void
1285 pmu_suspend(void)
1286 {
1287         unsigned long flags;
1288
1289         if (!via)
1290                 return;
1291
1292         spin_lock_irqsave(&pmu_lock, flags);
1293         pmu_suspended++;
1294         if (pmu_suspended > 1) {
1295                 spin_unlock_irqrestore(&pmu_lock, flags);
1296                 return;
1297         }
1298
1299         do {
1300                 spin_unlock_irqrestore(&pmu_lock, flags);
1301                 if (req_awaiting_reply)
1302                         adb_int_pending = 1;
1303                 via_pmu_interrupt(0, NULL);
1304                 spin_lock_irqsave(&pmu_lock, flags);
1305                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1306                         if (gpio_irq >= 0)
1307                                 disable_irq_nosync(gpio_irq);
1308                         out_8(&via[IER], CB1_INT | IER_CLR);
1309                         spin_unlock_irqrestore(&pmu_lock, flags);
1310                         break;
1311                 }
1312         } while (1);
1313 }
1314
1315 void
1316 pmu_resume(void)
1317 {
1318         unsigned long flags;
1319
1320         if (!via || (pmu_suspended < 1))
1321                 return;
1322
1323         spin_lock_irqsave(&pmu_lock, flags);
1324         pmu_suspended--;
1325         if (pmu_suspended > 0) {
1326                 spin_unlock_irqrestore(&pmu_lock, flags);
1327                 return;
1328         }
1329         adb_int_pending = 1;
1330         if (gpio_irq >= 0)
1331                 enable_irq(gpio_irq);
1332         out_8(&via[IER], CB1_INT | IER_SET);
1333         spin_unlock_irqrestore(&pmu_lock, flags);
1334         pmu_poll();
1335 }
1336
1337 /* Interrupt data could be the result data from an ADB cmd */
1338 static void
1339 pmu_handle_data(unsigned char *data, int len)
1340 {
1341         unsigned char ints, pirq;
1342         int i = 0;
1343
1344         asleep = 0;
1345         if (drop_interrupts || len < 1) {
1346                 adb_int_pending = 0;
1347                 pmu_irq_stats[8]++;
1348                 return;
1349         }
1350
1351         /* Get PMU interrupt mask */
1352         ints = data[0];
1353
1354         /* Record zero interrupts for stats */
1355         if (ints == 0)
1356                 pmu_irq_stats[9]++;
1357
1358         /* Hack to deal with ADB autopoll flag */
1359         if (ints & PMU_INT_ADB)
1360                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1361
1362 next:
1363
1364         if (ints == 0) {
1365                 if (i > pmu_irq_stats[10])
1366                         pmu_irq_stats[10] = i;
1367                 return;
1368         }
1369
1370         for (pirq = 0; pirq < 8; pirq++)
1371                 if (ints & (1 << pirq))
1372                         break;
1373         pmu_irq_stats[pirq]++;
1374         i++;
1375         ints &= ~(1 << pirq);
1376
1377         /* Note: for some reason, we get an interrupt with len=1,
1378          * data[0]==0 after each normal ADB interrupt, at least
1379          * on the Pismo. Still investigating...  --BenH
1380          */
1381         if ((1 << pirq) & PMU_INT_ADB) {
1382                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1383                         struct adb_request *req = req_awaiting_reply;
1384                         if (req == 0) {
1385                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1386                                 return;
1387                         }
1388                         req_awaiting_reply = NULL;
1389                         if (len <= 2)
1390                                 req->reply_len = 0;
1391                         else {
1392                                 memcpy(req->reply, data + 1, len - 1);
1393                                 req->reply_len = len - 1;
1394                         }
1395                         pmu_done(req);
1396                 } else {
1397                         if (len == 4 && data[1] == 0x2c) {
1398                                 extern int xmon_wants_key, xmon_adb_keycode;
1399                                 if (xmon_wants_key) {
1400                                         xmon_adb_keycode = data[2];
1401                                         return;
1402                                 }
1403                         }
1404 #ifdef CONFIG_ADB
1405                         /*
1406                          * XXX On the [23]400 the PMU gives us an up
1407                          * event for keycodes 0x74 or 0x75 when the PC
1408                          * card eject buttons are released, so we
1409                          * ignore those events.
1410                          */
1411                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1412                               && data[1] == 0x2c && data[3] == 0xff
1413                               && (data[2] & ~1) == 0xf4))
1414                                 adb_input(data+1, len-1, 1);
1415 #endif /* CONFIG_ADB */
1416                 }
1417         }
1418         /* Sound/brightness button pressed */
1419         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1420 #ifdef CONFIG_PMAC_BACKLIGHT
1421                 if (len == 3)
1422                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1423 #endif
1424         }
1425         /* Tick interrupt */
1426         else if ((1 << pirq) & PMU_INT_TICK) {
1427                 /* Environement or tick interrupt, query batteries */
1428                 if (pmu_battery_count) {
1429                         if ((--query_batt_timer) == 0) {
1430                                 query_battery_state();
1431                                 query_batt_timer = BATTERY_POLLING_COUNT;
1432                         }
1433                 }
1434         }
1435         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1436                 if (pmu_battery_count)
1437                         query_battery_state();
1438                 pmu_pass_intr(data, len);
1439                 /* len == 6 is probably a bad check. But how do I
1440                  * know what PMU versions send what events here? */
1441                 if (len == 6) {
1442                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1443                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1444                 }
1445         } else {
1446                pmu_pass_intr(data, len);
1447         }
1448         goto next;
1449 }
1450
1451 static struct adb_request*
1452 pmu_sr_intr(void)
1453 {
1454         struct adb_request *req;
1455         int bite = 0;
1456
1457         if (via[B] & TREQ) {
1458                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1459                 out_8(&via[IFR], SR_INT);
1460                 return NULL;
1461         }
1462         /* The ack may not yet be low when we get the interrupt */
1463         while ((in_8(&via[B]) & TACK) != 0)
1464                         ;
1465
1466         /* if reading grab the byte, and reset the interrupt */
1467         if (pmu_state == reading || pmu_state == reading_intr)
1468                 bite = in_8(&via[SR]);
1469
1470         /* reset TREQ and wait for TACK to go high */
1471         out_8(&via[B], in_8(&via[B]) | TREQ);
1472         wait_for_ack();
1473
1474         switch (pmu_state) {
1475         case sending:
1476                 req = current_req;
1477                 if (data_len < 0) {
1478                         data_len = req->nbytes - 1;
1479                         send_byte(data_len);
1480                         break;
1481                 }
1482                 if (data_index <= data_len) {
1483                         send_byte(req->data[data_index++]);
1484                         break;
1485                 }
1486                 req->sent = 1;
1487                 data_len = pmu_data_len[req->data[0]][1];
1488                 if (data_len == 0) {
1489                         pmu_state = idle;
1490                         current_req = req->next;
1491                         if (req->reply_expected)
1492                                 req_awaiting_reply = req;
1493                         else
1494                                 return req;
1495                 } else {
1496                         pmu_state = reading;
1497                         data_index = 0;
1498                         reply_ptr = req->reply + req->reply_len;
1499                         recv_byte();
1500                 }
1501                 break;
1502
1503         case intack:
1504                 data_index = 0;
1505                 data_len = -1;
1506                 pmu_state = reading_intr;
1507                 reply_ptr = interrupt_data[int_data_last];
1508                 recv_byte();
1509                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1510                         enable_irq(gpio_irq);
1511                         gpio_irq_enabled = 1;
1512                 }
1513                 break;
1514
1515         case reading:
1516         case reading_intr:
1517                 if (data_len == -1) {
1518                         data_len = bite;
1519                         if (bite > 32)
1520                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1521                 } else if (data_index < 32) {
1522                         reply_ptr[data_index++] = bite;
1523                 }
1524                 if (data_index < data_len) {
1525                         recv_byte();
1526                         break;
1527                 }
1528
1529                 if (pmu_state == reading_intr) {
1530                         pmu_state = idle;
1531                         int_data_state[int_data_last] = int_data_ready;
1532                         interrupt_data_len[int_data_last] = data_len;
1533                 } else {
1534                         req = current_req;
1535                         /*
1536                          * For PMU sleep and freq change requests, we lock the
1537                          * PMU until it's explicitly unlocked. This avoids any
1538                          * spurrious event polling getting in
1539                          */
1540                         current_req = req->next;
1541                         req->reply_len += data_index;
1542                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1543                                 pmu_state = locked;
1544                         else
1545                                 pmu_state = idle;
1546                         return req;
1547                 }
1548                 break;
1549
1550         default:
1551                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1552                        pmu_state);
1553         }
1554         return NULL;
1555 }
1556
1557 static irqreturn_t
1558 via_pmu_interrupt(int irq, void *arg)
1559 {
1560         unsigned long flags;
1561         int intr;
1562         int nloop = 0;
1563         int int_data = -1;
1564         struct adb_request *req = NULL;
1565         int handled = 0;
1566
1567         /* This is a bit brutal, we can probably do better */
1568         spin_lock_irqsave(&pmu_lock, flags);
1569         ++disable_poll;
1570
1571         for (;;) {
1572                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1573                 if (intr == 0)
1574                         break;
1575                 handled = 1;
1576                 if (++nloop > 1000) {
1577                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1578                                "intr=%x, ier=%x pmu_state=%d\n",
1579                                intr, in_8(&via[IER]), pmu_state);
1580                         break;
1581                 }
1582                 out_8(&via[IFR], intr);
1583                 if (intr & CB1_INT) {
1584                         adb_int_pending = 1;
1585                         pmu_irq_stats[0]++;
1586                 }
1587                 if (intr & SR_INT) {
1588                         req = pmu_sr_intr();
1589                         if (req)
1590                                 break;
1591                 }
1592         }
1593
1594 recheck:
1595         if (pmu_state == idle) {
1596                 if (adb_int_pending) {
1597                         if (int_data_state[0] == int_data_empty)
1598                                 int_data_last = 0;
1599                         else if (int_data_state[1] == int_data_empty)
1600                                 int_data_last = 1;
1601                         else
1602                                 goto no_free_slot;
1603                         pmu_state = intack;
1604                         int_data_state[int_data_last] = int_data_fill;
1605                         /* Sounds safer to make sure ACK is high before writing.
1606                          * This helped kill a problem with ADB and some iBooks
1607                          */
1608                         wait_for_ack();
1609                         send_byte(PMU_INT_ACK);
1610                         adb_int_pending = 0;
1611                 } else if (current_req)
1612                         pmu_start();
1613         }
1614 no_free_slot:
1615         /* Mark the oldest buffer for flushing */
1616         if (int_data_state[!int_data_last] == int_data_ready) {
1617                 int_data_state[!int_data_last] = int_data_flush;
1618                 int_data = !int_data_last;
1619         } else if (int_data_state[int_data_last] == int_data_ready) {
1620                 int_data_state[int_data_last] = int_data_flush;
1621                 int_data = int_data_last;
1622         }
1623         --disable_poll;
1624         spin_unlock_irqrestore(&pmu_lock, flags);
1625
1626         /* Deal with completed PMU requests outside of the lock */
1627         if (req) {
1628                 pmu_done(req);
1629                 req = NULL;
1630         }
1631
1632         /* Deal with interrupt datas outside of the lock */
1633         if (int_data >= 0) {
1634                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1635                 spin_lock_irqsave(&pmu_lock, flags);
1636                 ++disable_poll;
1637                 int_data_state[int_data] = int_data_empty;
1638                 int_data = -1;
1639                 goto recheck;
1640         }
1641
1642         return IRQ_RETVAL(handled);
1643 }
1644
1645 void
1646 pmu_unlock(void)
1647 {
1648         unsigned long flags;
1649
1650         spin_lock_irqsave(&pmu_lock, flags);
1651         if (pmu_state == locked)
1652                 pmu_state = idle;
1653         adb_int_pending = 1;
1654         spin_unlock_irqrestore(&pmu_lock, flags);
1655 }
1656
1657
1658 static irqreturn_t
1659 gpio1_interrupt(int irq, void *arg)
1660 {
1661         unsigned long flags;
1662
1663         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1664                 spin_lock_irqsave(&pmu_lock, flags);
1665                 if (gpio_irq_enabled > 0) {
1666                         disable_irq_nosync(gpio_irq);
1667                         gpio_irq_enabled = 0;
1668                 }
1669                 pmu_irq_stats[1]++;
1670                 adb_int_pending = 1;
1671                 spin_unlock_irqrestore(&pmu_lock, flags);
1672                 via_pmu_interrupt(0, NULL);
1673                 return IRQ_HANDLED;
1674         }
1675         return IRQ_NONE;
1676 }
1677
1678 void
1679 pmu_enable_irled(int on)
1680 {
1681         struct adb_request req;
1682
1683         if (vias == NULL)
1684                 return ;
1685         if (pmu_kind == PMU_KEYLARGO_BASED)
1686                 return ;
1687
1688         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1689             (on ? PMU_POW_ON : PMU_POW_OFF));
1690         pmu_wait_complete(&req);
1691 }
1692
1693 void
1694 pmu_restart(void)
1695 {
1696         struct adb_request req;
1697
1698         if (via == NULL)
1699                 return;
1700
1701         local_irq_disable();
1702
1703         drop_interrupts = 1;
1704
1705         if (pmu_kind != PMU_KEYLARGO_BASED) {
1706                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1707                                                 PMU_INT_TICK );
1708                 while(!req.complete)
1709                         pmu_poll();
1710         }
1711
1712         pmu_request(&req, NULL, 1, PMU_RESET);
1713         pmu_wait_complete(&req);
1714         for (;;)
1715                 ;
1716 }
1717
1718 void
1719 pmu_shutdown(void)
1720 {
1721         struct adb_request req;
1722
1723         if (via == NULL)
1724                 return;
1725
1726         local_irq_disable();
1727
1728         drop_interrupts = 1;
1729
1730         if (pmu_kind != PMU_KEYLARGO_BASED) {
1731                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1732                                                 PMU_INT_TICK );
1733                 pmu_wait_complete(&req);
1734         } else {
1735                 /* Disable server mode on shutdown or we'll just
1736                  * wake up again
1737                  */
1738                 pmu_set_server_mode(0);
1739         }
1740
1741         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1742                     'M', 'A', 'T', 'T');
1743         pmu_wait_complete(&req);
1744         for (;;)
1745                 ;
1746 }
1747
1748 int
1749 pmu_present(void)
1750 {
1751         return via != 0;
1752 }
1753
1754 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1755 /*
1756  * Put the powerbook to sleep.
1757  */
1758
1759 static u32 save_via[8];
1760
1761 static void
1762 save_via_state(void)
1763 {
1764         save_via[0] = in_8(&via[ANH]);
1765         save_via[1] = in_8(&via[DIRA]);
1766         save_via[2] = in_8(&via[B]);
1767         save_via[3] = in_8(&via[DIRB]);
1768         save_via[4] = in_8(&via[PCR]);
1769         save_via[5] = in_8(&via[ACR]);
1770         save_via[6] = in_8(&via[T1CL]);
1771         save_via[7] = in_8(&via[T1CH]);
1772 }
1773 static void
1774 restore_via_state(void)
1775 {
1776         out_8(&via[ANH], save_via[0]);
1777         out_8(&via[DIRA], save_via[1]);
1778         out_8(&via[B], save_via[2]);
1779         out_8(&via[DIRB], save_via[3]);
1780         out_8(&via[PCR], save_via[4]);
1781         out_8(&via[ACR], save_via[5]);
1782         out_8(&via[T1CL], save_via[6]);
1783         out_8(&via[T1CH], save_via[7]);
1784         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1785         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1786         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1787 }
1788
1789 #define GRACKLE_PM      (1<<7)
1790 #define GRACKLE_DOZE    (1<<5)
1791 #define GRACKLE_NAP     (1<<4)
1792 #define GRACKLE_SLEEP   (1<<3)
1793
1794 static int powerbook_sleep_grackle(void)
1795 {
1796         unsigned long save_l2cr;
1797         unsigned short pmcr1;
1798         struct adb_request req;
1799         struct pci_dev *grackle;
1800
1801         grackle = pci_get_bus_and_slot(0, 0);
1802         if (!grackle)
1803                 return -ENODEV;
1804
1805         /* Turn off various things. Darwin does some retry tests here... */
1806         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1807         pmu_wait_complete(&req);
1808         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1809                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1810         pmu_wait_complete(&req);
1811
1812         /* For 750, save backside cache setting and disable it */
1813         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1814
1815         if (!__fake_sleep) {
1816                 /* Ask the PMU to put us to sleep */
1817                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1818                 pmu_wait_complete(&req);
1819         }
1820
1821         /* The VIA is supposed not to be restored correctly*/
1822         save_via_state();
1823         /* We shut down some HW */
1824         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1825
1826         pci_read_config_word(grackle, 0x70, &pmcr1);
1827         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1828         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1829         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1830         pci_write_config_word(grackle, 0x70, pmcr1);
1831
1832         /* Call low-level ASM sleep handler */
1833         if (__fake_sleep)
1834                 mdelay(5000);
1835         else
1836                 low_sleep_handler();
1837
1838         /* We're awake again, stop grackle PM */
1839         pci_read_config_word(grackle, 0x70, &pmcr1);
1840         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1841         pci_write_config_word(grackle, 0x70, pmcr1);
1842
1843         pci_dev_put(grackle);
1844
1845         /* Make sure the PMU is idle */
1846         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1847         restore_via_state();
1848
1849         /* Restore L2 cache */
1850         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1851                 _set_L2CR(save_l2cr);
1852
1853         /* Restore userland MMU context */
1854         switch_mmu_context(NULL, current->active_mm, NULL);
1855
1856         /* Power things up */
1857         pmu_unlock();
1858         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1859         pmu_wait_complete(&req);
1860         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1861                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1862         pmu_wait_complete(&req);
1863         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1864                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1865         pmu_wait_complete(&req);
1866
1867         return 0;
1868 }
1869
1870 static int
1871 powerbook_sleep_Core99(void)
1872 {
1873         unsigned long save_l2cr;
1874         unsigned long save_l3cr;
1875         struct adb_request req;
1876
1877         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1878                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1879                 return -ENOSYS;
1880         }
1881
1882         if (num_online_cpus() > 1 || cpu_is_offline(0))
1883                 return -EAGAIN;
1884
1885         /* Stop environment and ADB interrupts */
1886         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1887         pmu_wait_complete(&req);
1888
1889         /* Tell PMU what events will wake us up */
1890         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1891                 0xff, 0xff);
1892         pmu_wait_complete(&req);
1893         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1894                 0, PMU_PWR_WAKEUP_KEY |
1895                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1896         pmu_wait_complete(&req);
1897
1898         /* Save the state of the L2 and L3 caches */
1899         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1900         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1901
1902         if (!__fake_sleep) {
1903                 /* Ask the PMU to put us to sleep */
1904                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1905                 pmu_wait_complete(&req);
1906         }
1907
1908         /* The VIA is supposed not to be restored correctly*/
1909         save_via_state();
1910
1911         /* Shut down various ASICs. There's a chance that we can no longer
1912          * talk to the PMU after this, so I moved it to _after_ sending the
1913          * sleep command to it. Still need to be checked.
1914          */
1915         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1916
1917         /* Call low-level ASM sleep handler */
1918         if (__fake_sleep)
1919                 mdelay(5000);
1920         else
1921                 low_sleep_handler();
1922
1923         /* Restore Apple core ASICs state */
1924         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1925
1926         /* Restore VIA */
1927         restore_via_state();
1928
1929         /* tweak LPJ before cpufreq is there */
1930         loops_per_jiffy *= 2;
1931
1932         /* Restore video */
1933         pmac_call_early_video_resume();
1934
1935         /* Restore L2 cache */
1936         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1937                 _set_L2CR(save_l2cr);
1938         /* Restore L3 cache */
1939         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1940                 _set_L3CR(save_l3cr);
1941
1942         /* Restore userland MMU context */
1943         switch_mmu_context(NULL, current->active_mm, NULL);
1944
1945         /* Tell PMU we are ready */
1946         pmu_unlock();
1947         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1948         pmu_wait_complete(&req);
1949         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1950         pmu_wait_complete(&req);
1951
1952         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1953         loops_per_jiffy /= 2;
1954
1955         return 0;
1956 }
1957
1958 #define PB3400_MEM_CTRL         0xf8000000
1959 #define PB3400_MEM_CTRL_SLEEP   0x70
1960
1961 static void __iomem *pb3400_mem_ctrl;
1962
1963 static void powerbook_sleep_init_3400(void)
1964 {
1965         /* map in the memory controller registers */
1966         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1967         if (pb3400_mem_ctrl == NULL)
1968                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1969 }
1970
1971 static int powerbook_sleep_3400(void)
1972 {
1973         int i, x;
1974         unsigned int hid0;
1975         unsigned long msr;
1976         struct adb_request sleep_req;
1977         unsigned int __iomem *mem_ctrl_sleep;
1978
1979         if (pb3400_mem_ctrl == NULL)
1980                 return -ENOMEM;
1981         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1982
1983         /* Set the memory controller to keep the memory refreshed
1984            while we're asleep */
1985         for (i = 0x403f; i >= 0x4000; --i) {
1986                 out_be32(mem_ctrl_sleep, i);
1987                 do {
1988                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1989                 } while (x == 0);
1990                 if (x >= 0x100)
1991                         break;
1992         }
1993
1994         /* Ask the PMU to put us to sleep */
1995         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1996         pmu_wait_complete(&sleep_req);
1997         pmu_unlock();
1998
1999         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2000
2001         asleep = 1;
2002
2003         /* Put the CPU into sleep mode */
2004         hid0 = mfspr(SPRN_HID0);
2005         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2006         mtspr(SPRN_HID0, hid0);
2007         local_irq_enable();
2008         msr = mfmsr() | MSR_POW;
2009         while (asleep) {
2010                 mb();
2011                 mtmsr(msr);
2012                 isync();
2013         }
2014         local_irq_disable();
2015
2016         /* OK, we're awake again, start restoring things */
2017         out_be32(mem_ctrl_sleep, 0x3f);
2018         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2019
2020         return 0;
2021 }
2022
2023 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2024
2025 /*
2026  * Support for /dev/pmu device
2027  */
2028 #define RB_SIZE         0x10
2029 struct pmu_private {
2030         struct list_head list;
2031         int     rb_get;
2032         int     rb_put;
2033         struct rb_entry {
2034                 unsigned short len;
2035                 unsigned char data[16];
2036         }       rb_buf[RB_SIZE];
2037         wait_queue_head_t wait;
2038         spinlock_t lock;
2039 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2040         int     backlight_locker;
2041 #endif
2042 };
2043
2044 static LIST_HEAD(all_pmu_pvt);
2045 static DEFINE_SPINLOCK(all_pvt_lock);
2046
2047 static void
2048 pmu_pass_intr(unsigned char *data, int len)
2049 {
2050         struct pmu_private *pp;
2051         struct list_head *list;
2052         int i;
2053         unsigned long flags;
2054
2055         if (len > sizeof(pp->rb_buf[0].data))
2056                 len = sizeof(pp->rb_buf[0].data);
2057         spin_lock_irqsave(&all_pvt_lock, flags);
2058         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2059                 pp = list_entry(list, struct pmu_private, list);
2060                 spin_lock(&pp->lock);
2061                 i = pp->rb_put + 1;
2062                 if (i >= RB_SIZE)
2063                         i = 0;
2064                 if (i != pp->rb_get) {
2065                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2066                         rp->len = len;
2067                         memcpy(rp->data, data, len);
2068                         pp->rb_put = i;
2069                         wake_up_interruptible(&pp->wait);
2070                 }
2071                 spin_unlock(&pp->lock);
2072         }
2073         spin_unlock_irqrestore(&all_pvt_lock, flags);
2074 }
2075
2076 static int
2077 pmu_open(struct inode *inode, struct file *file)
2078 {
2079         struct pmu_private *pp;
2080         unsigned long flags;
2081
2082         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2083         if (pp == 0)
2084                 return -ENOMEM;
2085         pp->rb_get = pp->rb_put = 0;
2086         spin_lock_init(&pp->lock);
2087         init_waitqueue_head(&pp->wait);
2088         mutex_lock(&pmu_info_proc_mutex);
2089         spin_lock_irqsave(&all_pvt_lock, flags);
2090 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2091         pp->backlight_locker = 0;
2092 #endif
2093         list_add(&pp->list, &all_pmu_pvt);
2094         spin_unlock_irqrestore(&all_pvt_lock, flags);
2095         file->private_data = pp;
2096         mutex_unlock(&pmu_info_proc_mutex);
2097         return 0;
2098 }
2099
2100 static ssize_t
2101 pmu_read(struct file *file, char __user *buf,
2102                         size_t count, loff_t *ppos)
2103 {
2104         struct pmu_private *pp = file->private_data;
2105         DECLARE_WAITQUEUE(wait, current);
2106         unsigned long flags;
2107         int ret = 0;
2108
2109         if (count < 1 || pp == 0)
2110                 return -EINVAL;
2111         if (!access_ok(VERIFY_WRITE, buf, count))
2112                 return -EFAULT;
2113
2114         spin_lock_irqsave(&pp->lock, flags);
2115         add_wait_queue(&pp->wait, &wait);
2116         set_current_state(TASK_INTERRUPTIBLE);
2117
2118         for (;;) {
2119                 ret = -EAGAIN;
2120                 if (pp->rb_get != pp->rb_put) {
2121                         int i = pp->rb_get;
2122                         struct rb_entry *rp = &pp->rb_buf[i];
2123                         ret = rp->len;
2124                         spin_unlock_irqrestore(&pp->lock, flags);
2125                         if (ret > count)
2126                                 ret = count;
2127                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2128                                 ret = -EFAULT;
2129                         if (++i >= RB_SIZE)
2130                                 i = 0;
2131                         spin_lock_irqsave(&pp->lock, flags);
2132                         pp->rb_get = i;
2133                 }
2134                 if (ret >= 0)
2135                         break;
2136                 if (file->f_flags & O_NONBLOCK)
2137                         break;
2138                 ret = -ERESTARTSYS;
2139                 if (signal_pending(current))
2140                         break;
2141                 spin_unlock_irqrestore(&pp->lock, flags);
2142                 schedule();
2143                 spin_lock_irqsave(&pp->lock, flags);
2144         }
2145         __set_current_state(TASK_RUNNING);
2146         remove_wait_queue(&pp->wait, &wait);
2147         spin_unlock_irqrestore(&pp->lock, flags);
2148
2149         return ret;
2150 }
2151
2152 static ssize_t
2153 pmu_write(struct file *file, const char __user *buf,
2154                          size_t count, loff_t *ppos)
2155 {
2156         return 0;
2157 }
2158
2159 static unsigned int
2160 pmu_fpoll(struct file *filp, poll_table *wait)
2161 {
2162         struct pmu_private *pp = filp->private_data;
2163         unsigned int mask = 0;
2164         unsigned long flags;
2165
2166         if (pp == 0)
2167                 return 0;
2168         poll_wait(filp, &pp->wait, wait);
2169         spin_lock_irqsave(&pp->lock, flags);
2170         if (pp->rb_get != pp->rb_put)
2171                 mask |= POLLIN;
2172         spin_unlock_irqrestore(&pp->lock, flags);
2173         return mask;
2174 }
2175
2176 static int
2177 pmu_release(struct inode *inode, struct file *file)
2178 {
2179         struct pmu_private *pp = file->private_data;
2180         unsigned long flags;
2181
2182         if (pp != 0) {
2183                 file->private_data = NULL;
2184                 spin_lock_irqsave(&all_pvt_lock, flags);
2185                 list_del(&pp->list);
2186                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2187
2188 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2189                 if (pp->backlight_locker)
2190                         pmac_backlight_enable();
2191 #endif
2192
2193                 kfree(pp);
2194         }
2195         return 0;
2196 }
2197
2198 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2199 static void pmac_suspend_disable_irqs(void)
2200 {
2201         /* Call platform functions marked "on sleep" */
2202         pmac_pfunc_i2c_suspend();
2203         pmac_pfunc_base_suspend();
2204 }
2205
2206 static int powerbook_sleep(suspend_state_t state)
2207 {
2208         int error = 0;
2209
2210         /* Wait for completion of async requests */
2211         while (!batt_req.complete)
2212                 pmu_poll();
2213
2214         /* Giveup the lazy FPU & vec so we don't have to back them
2215          * up from the low level code
2216          */
2217         enable_kernel_fp();
2218
2219 #ifdef CONFIG_ALTIVEC
2220         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2221                 enable_kernel_altivec();
2222 #endif /* CONFIG_ALTIVEC */
2223
2224         switch (pmu_kind) {
2225         case PMU_OHARE_BASED:
2226                 error = powerbook_sleep_3400();
2227                 break;
2228         case PMU_HEATHROW_BASED:
2229         case PMU_PADDINGTON_BASED:
2230                 error = powerbook_sleep_grackle();
2231                 break;
2232         case PMU_KEYLARGO_BASED:
2233                 error = powerbook_sleep_Core99();
2234                 break;
2235         default:
2236                 return -ENOSYS;
2237         }
2238
2239         if (error)
2240                 return error;
2241
2242         mdelay(100);
2243
2244         return 0;
2245 }
2246
2247 static void pmac_suspend_enable_irqs(void)
2248 {
2249         /* Force a poll of ADB interrupts */
2250         adb_int_pending = 1;
2251         via_pmu_interrupt(0, NULL);
2252
2253         mdelay(10);
2254
2255         /* Call platform functions marked "on wake" */
2256         pmac_pfunc_base_resume();
2257         pmac_pfunc_i2c_resume();
2258 }
2259
2260 static int pmu_sleep_valid(suspend_state_t state)
2261 {
2262         return state == PM_SUSPEND_MEM
2263                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2264 }
2265
2266 static const struct platform_suspend_ops pmu_pm_ops = {
2267         .enter = powerbook_sleep,
2268         .valid = pmu_sleep_valid,
2269 };
2270
2271 static int register_pmu_pm_ops(void)
2272 {
2273         if (pmu_kind == PMU_OHARE_BASED)
2274                 powerbook_sleep_init_3400();
2275         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2276         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2277         suspend_set_ops(&pmu_pm_ops);
2278
2279         return 0;
2280 }
2281
2282 device_initcall(register_pmu_pm_ops);
2283 #endif
2284
2285 static int pmu_ioctl(struct file *filp,
2286                      u_int cmd, u_long arg)
2287 {
2288         __u32 __user *argp = (__u32 __user *)arg;
2289         int error = -EINVAL;
2290
2291         switch (cmd) {
2292         case PMU_IOC_SLEEP:
2293                 if (!capable(CAP_SYS_ADMIN))
2294                         return -EACCES;
2295                 return pm_suspend(PM_SUSPEND_MEM);
2296         case PMU_IOC_CAN_SLEEP:
2297                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2298                         return put_user(0, argp);
2299                 else
2300                         return put_user(1, argp);
2301
2302 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2303         /* Compatibility ioctl's for backlight */
2304         case PMU_IOC_GET_BACKLIGHT:
2305         {
2306                 int brightness;
2307
2308                 brightness = pmac_backlight_get_legacy_brightness();
2309                 if (brightness < 0)
2310                         return brightness;
2311                 else
2312                         return put_user(brightness, argp);
2313
2314         }
2315         case PMU_IOC_SET_BACKLIGHT:
2316         {
2317                 int brightness;
2318
2319                 error = get_user(brightness, argp);
2320                 if (error)
2321                         return error;
2322
2323                 return pmac_backlight_set_legacy_brightness(brightness);
2324         }
2325 #ifdef CONFIG_INPUT_ADBHID
2326         case PMU_IOC_GRAB_BACKLIGHT: {
2327                 struct pmu_private *pp = filp->private_data;
2328
2329                 if (pp->backlight_locker)
2330                         return 0;
2331
2332                 pp->backlight_locker = 1;
2333                 pmac_backlight_disable();
2334
2335                 return 0;
2336         }
2337 #endif /* CONFIG_INPUT_ADBHID */
2338 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2339
2340         case PMU_IOC_GET_MODEL:
2341                 return put_user(pmu_kind, argp);
2342         case PMU_IOC_HAS_ADB:
2343                 return put_user(pmu_has_adb, argp);
2344         }
2345         return error;
2346 }
2347
2348 static long pmu_unlocked_ioctl(struct file *filp,
2349                                u_int cmd, u_long arg)
2350 {
2351         int ret;
2352
2353         mutex_lock(&pmu_info_proc_mutex);
2354         ret = pmu_ioctl(filp, cmd, arg);
2355         mutex_unlock(&pmu_info_proc_mutex);
2356
2357         return ret;
2358 }
2359
2360 #ifdef CONFIG_COMPAT
2361 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2362 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2363 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2364 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2365 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2366 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2367
2368 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2369 {
2370         switch (cmd) {
2371         case PMU_IOC_SLEEP:
2372                 break;
2373         case PMU_IOC_GET_BACKLIGHT32:
2374                 cmd = PMU_IOC_GET_BACKLIGHT;
2375                 break;
2376         case PMU_IOC_SET_BACKLIGHT32:
2377                 cmd = PMU_IOC_SET_BACKLIGHT;
2378                 break;
2379         case PMU_IOC_GET_MODEL32:
2380                 cmd = PMU_IOC_GET_MODEL;
2381                 break;
2382         case PMU_IOC_HAS_ADB32:
2383                 cmd = PMU_IOC_HAS_ADB;
2384                 break;
2385         case PMU_IOC_CAN_SLEEP32:
2386                 cmd = PMU_IOC_CAN_SLEEP;
2387                 break;
2388         case PMU_IOC_GRAB_BACKLIGHT32:
2389                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2390                 break;
2391         default:
2392                 return -ENOIOCTLCMD;
2393         }
2394         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2395 }
2396 #endif
2397
2398 static const struct file_operations pmu_device_fops = {
2399         .read           = pmu_read,
2400         .write          = pmu_write,
2401         .poll           = pmu_fpoll,
2402         .unlocked_ioctl = pmu_unlocked_ioctl,
2403 #ifdef CONFIG_COMPAT
2404         .compat_ioctl   = compat_pmu_ioctl,
2405 #endif
2406         .open           = pmu_open,
2407         .release        = pmu_release,
2408         .llseek         = noop_llseek,
2409 };
2410
2411 static struct miscdevice pmu_device = {
2412         PMU_MINOR, "pmu", &pmu_device_fops
2413 };
2414
2415 static int pmu_device_init(void)
2416 {
2417         if (!via)
2418                 return 0;
2419         if (misc_register(&pmu_device) < 0)
2420                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2421         return 0;
2422 }
2423 device_initcall(pmu_device_init);
2424
2425
2426 #ifdef DEBUG_SLEEP
2427 static inline void
2428 polled_handshake(volatile unsigned char __iomem *via)
2429 {
2430         via[B] &= ~TREQ; eieio();
2431         while ((via[B] & TACK) != 0)
2432                 ;
2433         via[B] |= TREQ; eieio();
2434         while ((via[B] & TACK) == 0)
2435                 ;
2436 }
2437
2438 static inline void
2439 polled_send_byte(volatile unsigned char __iomem *via, int x)
2440 {
2441         via[ACR] |= SR_OUT | SR_EXT; eieio();
2442         via[SR] = x; eieio();
2443         polled_handshake(via);
2444 }
2445
2446 static inline int
2447 polled_recv_byte(volatile unsigned char __iomem *via)
2448 {
2449         int x;
2450
2451         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2452         x = via[SR]; eieio();
2453         polled_handshake(via);
2454         x = via[SR]; eieio();
2455         return x;
2456 }
2457
2458 int
2459 pmu_polled_request(struct adb_request *req)
2460 {
2461         unsigned long flags;
2462         int i, l, c;
2463         volatile unsigned char __iomem *v = via;
2464
2465         req->complete = 1;
2466         c = req->data[0];
2467         l = pmu_data_len[c][0];
2468         if (l >= 0 && req->nbytes != l + 1)
2469                 return -EINVAL;
2470
2471         local_irq_save(flags);
2472         while (pmu_state != idle)
2473                 pmu_poll();
2474
2475         while ((via[B] & TACK) == 0)
2476                 ;
2477         polled_send_byte(v, c);
2478         if (l < 0) {
2479                 l = req->nbytes - 1;
2480                 polled_send_byte(v, l);
2481         }
2482         for (i = 1; i <= l; ++i)
2483                 polled_send_byte(v, req->data[i]);
2484
2485         l = pmu_data_len[c][1];
2486         if (l < 0)
2487                 l = polled_recv_byte(v);
2488         for (i = 0; i < l; ++i)
2489                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2490
2491         if (req->done)
2492                 (*req->done)(req);
2493
2494         local_irq_restore(flags);
2495         return 0;
2496 }
2497
2498 /* N.B. This doesn't work on the 3400 */
2499 void pmu_blink(int n)
2500 {
2501         struct adb_request req;
2502
2503         memset(&req, 0, sizeof(req));
2504
2505         for (; n > 0; --n) {
2506                 req.nbytes = 4;
2507                 req.done = NULL;
2508                 req.data[0] = 0xee;
2509                 req.data[1] = 4;
2510                 req.data[2] = 0;
2511                 req.data[3] = 1;
2512                 req.reply[0] = ADB_RET_OK;
2513                 req.reply_len = 1;
2514                 req.reply_expected = 0;
2515                 pmu_polled_request(&req);
2516                 mdelay(50);
2517                 req.nbytes = 4;
2518                 req.done = NULL;
2519                 req.data[0] = 0xee;
2520                 req.data[1] = 4;
2521                 req.data[2] = 0;
2522                 req.data[3] = 0;
2523                 req.reply[0] = ADB_RET_OK;
2524                 req.reply_len = 1;
2525                 req.reply_expected = 0;
2526                 pmu_polled_request(&req);
2527                 mdelay(50);
2528         }
2529         mdelay(50);
2530 }
2531 #endif /* DEBUG_SLEEP */
2532
2533 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2534 int pmu_sys_suspended;
2535
2536 static int pmu_syscore_suspend(void)
2537 {
2538         /* Suspend PMU event interrupts */
2539         pmu_suspend();
2540         pmu_sys_suspended = 1;
2541
2542 #ifdef CONFIG_PMAC_BACKLIGHT
2543         /* Tell backlight code not to muck around with the chip anymore */
2544         pmu_backlight_set_sleep(1);
2545 #endif
2546
2547         return 0;
2548 }
2549
2550 static void pmu_syscore_resume(void)
2551 {
2552         struct adb_request req;
2553
2554         if (!pmu_sys_suspended)
2555                 return;
2556
2557         /* Tell PMU we are ready */
2558         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2559         pmu_wait_complete(&req);
2560
2561 #ifdef CONFIG_PMAC_BACKLIGHT
2562         /* Tell backlight code it can use the chip again */
2563         pmu_backlight_set_sleep(0);
2564 #endif
2565         /* Resume PMU event interrupts */
2566         pmu_resume();
2567         pmu_sys_suspended = 0;
2568 }
2569
2570 static struct syscore_ops pmu_syscore_ops = {
2571         .suspend = pmu_syscore_suspend,
2572         .resume = pmu_syscore_resume,
2573 };
2574
2575 static int pmu_syscore_register(void)
2576 {
2577         register_syscore_ops(&pmu_syscore_ops);
2578
2579         return 0;
2580 }
2581 subsys_initcall(pmu_syscore_register);
2582 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2583
2584 EXPORT_SYMBOL(pmu_request);
2585 EXPORT_SYMBOL(pmu_queue_request);
2586 EXPORT_SYMBOL(pmu_poll);
2587 EXPORT_SYMBOL(pmu_poll_adb);
2588 EXPORT_SYMBOL(pmu_wait_complete);
2589 EXPORT_SYMBOL(pmu_suspend);
2590 EXPORT_SYMBOL(pmu_resume);
2591 EXPORT_SYMBOL(pmu_unlock);
2592 #if defined(CONFIG_PPC32)
2593 EXPORT_SYMBOL(pmu_enable_irled);
2594 EXPORT_SYMBOL(pmu_battery_count);
2595 EXPORT_SYMBOL(pmu_batteries);
2596 EXPORT_SYMBOL(pmu_power_flags);
2597 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2598