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/smp_lock.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/sysdev.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 <asm/prom.h>
  50 #include <asm/machdep.h>
  51 #include <asm/io.h>
  52 #include <asm/pgtable.h>
  53 #include <asm/system.h>
  54 #include <asm/sections.h>
  55 #include <asm/irq.h>
  56 #include <asm/pmac_feature.h>
  57 #include <asm/pmac_pfunc.h>
  58 #include <asm/pmac_low_i2c.h>
  59 #include <asm/uaccess.h>
  60 #include <asm/mmu_context.h>
  61 #include <asm/cputable.h>
  62 #include <asm/time.h>
  63 #include <asm/backlight.h>
  64
  65 #include "via-pmu-event.h"
  66
  67 /* Some compile options */
  68 #undef DEBUG_SLEEP
  69
  70 /* Misc minor number allocated for /dev/pmu */
  71 #define PMU_MINOR               154
  72
  73 /* How many iterations between battery polls */
  74 #define BATTERY_POLLING_COUNT   2
  75
  76 static volatile unsigned char __iomem *via;
  77
  78 /* VIA registers - spaced 0x200 bytes apart */
  79 #define RS              0x200           /* skip between registers */
  80 #define B               0               /* B-side data */
  81 #define A               RS              /* A-side data */
  82 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  83 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  84 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  85 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  86 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  87 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  88 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  89 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  90 #define SR              (10*RS)         /* Shift register */
  91 #define ACR             (11*RS)         /* Auxiliary control register */
  92 #define PCR             (12*RS)         /* Peripheral control register */
  93 #define IFR             (13*RS)         /* Interrupt flag register */
  94 #define IER             (14*RS)         /* Interrupt enable register */
  95 #define ANH             (15*RS)         /* A-side data, no handshake */
  96
  97 /* Bits in B data register: both active low */
  98 #define TACK            0x08            /* Transfer acknowledge (input) */
  99 #define TREQ            0x10            /* Transfer request (output) */
 100
 101 /* Bits in ACR */
 102 #define SR_CTRL         0x1c            /* Shift register control bits */
 103 #define SR_EXT          0x0c            /* Shift on external clock */
 104 #define SR_OUT          0x10            /* Shift out if 1 */
 105
 106 /* Bits in IFR and IER */
 107 #define IER_SET         0x80            /* set bits in IER */
 108 #define IER_CLR         0               /* clear bits in IER */
 109 #define SR_INT          0x04            /* Shift register full/empty */
 110 #define CB2_INT         0x08
 111 #define CB1_INT         0x10            /* transition on CB1 input */
 112
 113 static volatile enum pmu_state {
 114         idle,
 115         sending,
 116         intack,
 117         reading,
 118         reading_intr,
 119         locked,
 120 } pmu_state;
 121
 122 static volatile enum int_data_state {
 123         int_data_empty,
 124         int_data_fill,
 125         int_data_ready,
 126         int_data_flush
 127 } int_data_state[2] = { int_data_empty, int_data_empty };
 128
 129 static struct adb_request *current_req;
 130 static struct adb_request *last_req;
 131 static struct adb_request *req_awaiting_reply;
 132 static unsigned char interrupt_data[2][32];
 133 static int interrupt_data_len[2];
 134 static int int_data_last;
 135 static unsigned char *reply_ptr;
 136 static int data_index;
 137 static int data_len;
 138 static volatile int adb_int_pending;
 139 static volatile int disable_poll;
 140 static struct device_node *vias;
 141 static int pmu_kind = PMU_UNKNOWN;
 142 static int pmu_fully_inited;
 143 static int pmu_has_adb;
 144 static struct device_node *gpio_node;
 145 static unsigned char __iomem *gpio_reg;
 146 static int gpio_irq = NO_IRQ;
 147 static int gpio_irq_enabled = -1;
 148 static volatile int pmu_suspended;
 149 static spinlock_t pmu_lock;
 150 static u8 pmu_intr_mask;
 151 static int pmu_version;
 152 static int drop_interrupts;
 153 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 154 static int option_lid_wakeup = 1;
 155 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 156 static unsigned long async_req_locks;
 157 static unsigned int pmu_irq_stats[11];
 158
 159 static struct proc_dir_entry *proc_pmu_root;
 160 static struct proc_dir_entry *proc_pmu_info;
 161 static struct proc_dir_entry *proc_pmu_irqstats;
 162 static struct proc_dir_entry *proc_pmu_options;
 163 static int option_server_mode;
 164
 165 int pmu_battery_count;
 166 int pmu_cur_battery;
 167 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 168 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 169 static int query_batt_timer = BATTERY_POLLING_COUNT;
 170 static struct adb_request batt_req;
 171 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 172
 173 int __fake_sleep;
 174 int asleep;
 175
 176 #ifdef CONFIG_ADB
 177 static int adb_dev_map;
 178 static int pmu_adb_flags;
 179
 180 static int pmu_probe(void);
 181 static int pmu_init(void);
 182 static int pmu_send_request(struct adb_request *req, int sync);
 183 static int pmu_adb_autopoll(int devs);
 184 static int pmu_adb_reset_bus(void);
 185 #endif /* CONFIG_ADB */
 186
 187 static int init_pmu(void);
 188 static void pmu_start(void);
 189 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 190 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 191 static const struct file_operations pmu_info_proc_fops;
 192 static const struct file_operations pmu_irqstats_proc_fops;
 193 static void pmu_pass_intr(unsigned char *data, int len);
 194 static const struct file_operations pmu_battery_proc_fops;
 195 static const struct file_operations pmu_options_proc_fops;
 196
 197 #ifdef CONFIG_ADB
 198 struct adb_driver via_pmu_driver = {
 199         "PMU",
 200         pmu_probe,
 201         pmu_init,
 202         pmu_send_request,
 203         pmu_adb_autopoll,
 204         pmu_poll_adb,
 205         pmu_adb_reset_bus
 206 };
 207 #endif /* CONFIG_ADB */
 208
 209 extern void low_sleep_handler(void);
 210 extern void enable_kernel_altivec(void);
 211 extern void enable_kernel_fp(void);
 212
 213 #ifdef DEBUG_SLEEP
 214 int pmu_polled_request(struct adb_request *req);
 215 void pmu_blink(int n);
 216 #endif
 217
 218 /*
 219  * This table indicates for each PMU opcode:
 220  * - the number of data bytes to be sent with the command, or -1
 221  *   if a length byte should be sent,
 222  * - the number of response bytes which the PMU will return, or
 223  *   -1 if it will send a length byte.
 224  */
 225 static const s8 pmu_data_len[256][2] = {
 226 /*         0       1       2       3       4       5       6       7  */
 227 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 228 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 229 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 230 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 231 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 232 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 233 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 234 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 235 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 236 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 237 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 238 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 239 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 240 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 241 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 242 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 243 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 245 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 247 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 248 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 249 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 250 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 251 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 253 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 255 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 256 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 257 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 259 };
 260
 261 static char *pbook_type[] = {
 262         "Unknown PowerBook",
 263         "PowerBook 2400/3400/3500(G3)",
 264         "PowerBook G3 Series",
 265         "1999 PowerBook G3",
 266         "Core99"
 267 };
 268
 269 int __init find_via_pmu(void)
 270 {
 271         u64 taddr;
 272         const u32 *reg;
 273
 274         if (via != 0)
 275                 return 1;
 276         vias = of_find_node_by_name(NULL, "via-pmu");
 277         if (vias == NULL)
 278                 return 0;
 279
 280         reg = of_get_property(vias, "reg", NULL);
 281         if (reg == NULL) {
 282                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 283                 goto fail;
 284         }
 285         taddr = of_translate_address(vias, reg);
 286         if (taddr == OF_BAD_ADDR) {
 287                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 288                 goto fail;
 289         }
 290
 291         spin_lock_init(&pmu_lock);
 292
 293         pmu_has_adb = 1;
 294
 295         pmu_intr_mask = PMU_INT_PCEJECT |
 296                         PMU_INT_SNDBRT |
 297                         PMU_INT_ADB |
 298                         PMU_INT_TICK;
 299
 300         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 301             || of_device_is_compatible(vias->parent, "ohare")))
 302                 pmu_kind = PMU_OHARE_BASED;
 303         else if (of_device_is_compatible(vias->parent, "paddington"))
 304                 pmu_kind = PMU_PADDINGTON_BASED;
 305         else if (of_device_is_compatible(vias->parent, "heathrow"))
 306                 pmu_kind = PMU_HEATHROW_BASED;
 307         else if (of_device_is_compatible(vias->parent, "Keylargo")
 308                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 309                 struct device_node *gpiop;
 310                 struct device_node *adbp;
 311                 u64 gaddr = OF_BAD_ADDR;
 312
 313                 pmu_kind = PMU_KEYLARGO_BASED;
 314                 adbp = of_find_node_by_type(NULL, "adb");
 315                 pmu_has_adb = (adbp != NULL);
 316                 of_node_put(adbp);
 317                 pmu_intr_mask = PMU_INT_PCEJECT |
 318                                 PMU_INT_SNDBRT |
 319                                 PMU_INT_ADB |
 320                                 PMU_INT_TICK |
 321                                 PMU_INT_ENVIRONMENT;
 322
 323                 gpiop = of_find_node_by_name(NULL, "gpio");
 324                 if (gpiop) {
 325                         reg = of_get_property(gpiop, "reg", NULL);
 326                         if (reg)
 327                                 gaddr = of_translate_address(gpiop, reg);
 328                         if (gaddr != OF_BAD_ADDR)
 329                                 gpio_reg = ioremap(gaddr, 0x10);
 330                 }
 331                 if (gpio_reg == NULL) {
 332                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 333                         goto fail_gpio;
 334                 }
 335         } else
 336                 pmu_kind = PMU_UNKNOWN;
 337
 338         via = ioremap(taddr, 0x2000);
 339         if (via == NULL) {
 340                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 341                 goto fail;
 342         }
 343
 344         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 345         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 346
 347         pmu_state = idle;
 348
 349         if (!init_pmu()) {
 350                 via = NULL;
 351                 return 0;
 352         }
 353
 354         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 355                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 356
 357         sys_ctrler = SYS_CTRLER_PMU;
 358
 359         return 1;
 360  fail:
 361         of_node_put(vias);
 362         iounmap(gpio_reg);
 363         gpio_reg = NULL;
 364  fail_gpio:
 365         vias = NULL;
 366         return 0;
 367 }
 368
 369 #ifdef CONFIG_ADB
 370 static int pmu_probe(void)
 371 {
 372         return vias == NULL? -ENODEV: 0;
 373 }
 374
 375 static int __init pmu_init(void)
 376 {
 377         if (vias == NULL)
 378                 return -ENODEV;
 379         return 0;
 380 }
 381 #endif /* CONFIG_ADB */
 382
 383 /*
 384  * We can't wait until pmu_init gets called, that happens too late.
 385  * It happens after IDE and SCSI initialization, which can take a few
 386  * seconds, and by that time the PMU could have given up on us and
 387  * turned us off.
 388  * Thus this is called with arch_initcall rather than device_initcall.
 389  */
 390 static int __init via_pmu_start(void)
 391 {
 392         unsigned int irq;
 393
 394         if (vias == NULL)
 395                 return -ENODEV;
 396
 397         batt_req.complete = 1;
 398
 399         irq = irq_of_parse_and_map(vias, 0);
 400         if (irq == NO_IRQ) {
 401                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 402                 return -ENODEV;
 403         }
 404         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 405          * to be disabled between the 2 passes of driver suspend, we
 406          * control our own disabling for that one
 407          */
 408         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 409                         "VIA-PMU", (void *)0)) {
 410                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 411                 return -ENODEV;
 412         }
 413
 414         if (pmu_kind == PMU_KEYLARGO_BASED) {
 415                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 416                 if (gpio_node == NULL)
 417                         gpio_node = of_find_node_by_name(NULL,
 418                                                          "pmu-interrupt");
 419                 if (gpio_node)
 420                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 421
 422                 if (gpio_irq != NO_IRQ) {
 423                         if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
 424                                         "GPIO1 ADB", (void *)0))
 425                                 printk(KERN_ERR "pmu: can't get irq %d"
 426                                        " (GPIO1)\n", gpio_irq);
 427                         else
 428                                 gpio_irq_enabled = 1;
 429                 }
 430         }
 431
 432         /* Enable interrupts */
 433         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 434
 435         pmu_fully_inited = 1;
 436
 437         /* Make sure PMU settle down before continuing. This is _very_ important
 438          * since the IDE probe may shut interrupts down for quite a bit of time. If
 439          * a PMU communication is pending while this happens, the PMU may timeout
 440          * Not that on Core99 machines, the PMU keeps sending us environement
 441          * messages, we should find a way to either fix IDE or make it call
 442          * pmu_suspend() before masking interrupts. This can also happens while
 443          * scolling with some fbdevs.
 444          */
 445         do {
 446                 pmu_poll();
 447         } while (pmu_state != idle);
 448
 449         return 0;
 450 }
 451
 452 arch_initcall(via_pmu_start);
 453
 454 /*
 455  * This has to be done after pci_init, which is a subsys_initcall.
 456  */
 457 static int __init via_pmu_dev_init(void)
 458 {
 459         if (vias == NULL)
 460                 return -ENODEV;
 461
 462 #ifdef CONFIG_PMAC_BACKLIGHT
 463         /* Initialize backlight */
 464         pmu_backlight_init();
 465 #endif
 466
 467 #ifdef CONFIG_PPC32
 468         if (of_machine_is_compatible("AAPL,3400/2400") ||
 469                 of_machine_is_compatible("AAPL,3500")) {
 470                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 471                         NULL, PMAC_MB_INFO_MODEL, 0);
 472                 pmu_battery_count = 1;
 473                 if (mb == PMAC_TYPE_COMET)
 474                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 475                 else
 476                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 477         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 478                 of_machine_is_compatible("PowerBook1,1")) {
 479                 pmu_battery_count = 2;
 480                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 481                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 482         } else {
 483                 struct device_node* prim =
 484                         of_find_node_by_name(NULL, "power-mgt");
 485                 const u32 *prim_info = NULL;
 486                 if (prim)
 487                         prim_info = of_get_property(prim, "prim-info", NULL);
 488                 if (prim_info) {
 489                         /* Other stuffs here yet unknown */
 490                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 491                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 492                         if (pmu_battery_count > 1)
 493                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 494                 }
 495                 of_node_put(prim);
 496         }
 497 #endif /* CONFIG_PPC32 */
 498
 499         /* Create /proc/pmu */
 500         proc_pmu_root = proc_mkdir("pmu", NULL);
 501         if (proc_pmu_root) {
 502                 long i;
 503
 504                 for (i=0; i<pmu_battery_count; i++) {
 505                         char title[16];
 506                         sprintf(title, "battery_%ld", i);
 507                         proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 508                                         &pmu_battery_proc_fops, (void *)i);
 509                 }
 510
 511                 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 512                 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 513                                                 &pmu_irqstats_proc_fops);
 514                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 515                                                 &pmu_options_proc_fops);
 516         }
 517         return 0;
 518 }
 519
 520 device_initcall(via_pmu_dev_init);
 521
 522 static int
 523 init_pmu(void)
 524 {
 525         int timeout;
 526         struct adb_request req;
 527
 528         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 529         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 530
 531         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 532         timeout =  100000;
 533         while (!req.complete) {
 534                 if (--timeout < 0) {
 535                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 536                         return 0;
 537                 }
 538                 udelay(10);
 539                 pmu_poll();
 540         }
 541
 542         /* ack all pending interrupts */
 543         timeout = 100000;
 544         interrupt_data[0][0] = 1;
 545         while (interrupt_data[0][0] || pmu_state != idle) {
 546                 if (--timeout < 0) {
 547                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 548                         return 0;
 549                 }
 550                 if (pmu_state == idle)
 551                         adb_int_pending = 1;
 552                 via_pmu_interrupt(0, NULL);
 553                 udelay(10);
 554         }
 555
 556         /* Tell PMU we are ready.  */
 557         if (pmu_kind == PMU_KEYLARGO_BASED) {
 558                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 559                 while (!req.complete)
 560                         pmu_poll();
 561         }
 562
 563         /* Read PMU version */
 564         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 565         pmu_wait_complete(&req);
 566         if (req.reply_len > 0)
 567                 pmu_version = req.reply[0];
 568
 569         /* Read server mode setting */
 570         if (pmu_kind == PMU_KEYLARGO_BASED) {
 571                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 572                             PMU_PWR_GET_POWERUP_EVENTS);
 573                 pmu_wait_complete(&req);
 574                 if (req.reply_len == 2) {
 575                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 576                                 option_server_mode = 1;
 577                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 578                                option_server_mode ? "enabled" : "disabled");
 579                 }
 580         }
 581         return 1;
 582 }
 583
 584 int
 585 pmu_get_model(void)
 586 {
 587         return pmu_kind;
 588 }
 589
 590 static void pmu_set_server_mode(int server_mode)
 591 {
 592         struct adb_request req;
 593
 594         if (pmu_kind != PMU_KEYLARGO_BASED)
 595                 return;
 596
 597         option_server_mode = server_mode;
 598         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 599         pmu_wait_complete(&req);
 600         if (req.reply_len < 2)
 601                 return;
 602         if (server_mode)
 603                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 604                             PMU_PWR_SET_POWERUP_EVENTS,
 605                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 606         else
 607                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 608                             PMU_PWR_CLR_POWERUP_EVENTS,
 609                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 610         pmu_wait_complete(&req);
 611 }
 612
 613 /* This new version of the code for 2400/3400/3500 powerbooks
 614  * is inspired from the implementation in gkrellm-pmu
 615  */
 616 static void
 617 done_battery_state_ohare(struct adb_request* req)
 618 {
 619         /* format:
 620          *  [0]    :  flags
 621          *    0x01 :  AC indicator
 622          *    0x02 :  charging
 623          *    0x04 :  battery exist
 624          *    0x08 :
 625          *    0x10 :
 626          *    0x20 :  full charged
 627          *    0x40 :  pcharge reset
 628          *    0x80 :  battery exist
 629          *
 630          *  [1][2] :  battery voltage
 631          *  [3]    :  CPU temperature
 632          *  [4]    :  battery temperature
 633          *  [5]    :  current
 634          *  [6][7] :  pcharge
 635          *              --tkoba
 636          */
 637         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 638         long pcharge, charge, vb, vmax, lmax;
 639         long vmax_charging, vmax_charged;
 640         long amperage, voltage, time, max;
 641         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 642                         NULL, PMAC_MB_INFO_MODEL, 0);
 643
 644         if (req->reply[0] & 0x01)
 645                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 646         else
 647                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 648
 649         if (mb == PMAC_TYPE_COMET) {
 650                 vmax_charged = 189;
 651                 vmax_charging = 213;
 652                 lmax = 6500;
 653         } else {
 654                 vmax_charged = 330;
 655                 vmax_charging = 330;
 656                 lmax = 6500;
 657         }
 658         vmax = vmax_charged;
 659
 660         /* If battery installed */
 661         if (req->reply[0] & 0x04) {
 662                 bat_flags |= PMU_BATT_PRESENT;
 663                 if (req->reply[0] & 0x02)
 664                         bat_flags |= PMU_BATT_CHARGING;
 665                 vb = (req->reply[1] << 8) | req->reply[2];
 666                 voltage = (vb * 265 + 72665) / 10;
 667                 amperage = req->reply[5];
 668                 if ((req->reply[0] & 0x01) == 0) {
 669                         if (amperage > 200)
 670                                 vb += ((amperage - 200) * 15)/100;
 671                 } else if (req->reply[0] & 0x02) {
 672                         vb = (vb * 97) / 100;
 673                         vmax = vmax_charging;
 674                 }
 675                 charge = (100 * vb) / vmax;
 676                 if (req->reply[0] & 0x40) {
 677                         pcharge = (req->reply[6] << 8) + req->reply[7];
 678                         if (pcharge > lmax)
 679                                 pcharge = lmax;
 680                         pcharge *= 100;
 681                         pcharge = 100 - pcharge / lmax;
 682                         if (pcharge < charge)
 683                                 charge = pcharge;
 684                 }
 685                 if (amperage > 0)
 686                         time = (charge * 16440) / amperage;
 687                 else
 688                         time = 0;
 689                 max = 100;
 690                 amperage = -amperage;
 691         } else
 692                 charge = max = amperage = voltage = time = 0;
 693
 694         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 695         pmu_batteries[pmu_cur_battery].charge = charge;
 696         pmu_batteries[pmu_cur_battery].max_charge = max;
 697         pmu_batteries[pmu_cur_battery].amperage = amperage;
 698         pmu_batteries[pmu_cur_battery].voltage = voltage;
 699         pmu_batteries[pmu_cur_battery].time_remaining = time;
 700
 701         clear_bit(0, &async_req_locks);
 702 }
 703
 704 static void
 705 done_battery_state_smart(struct adb_request* req)
 706 {
 707         /* format:
 708          *  [0] : format of this structure (known: 3,4,5)
 709          *  [1] : flags
 710          *
 711          *  format 3 & 4:
 712          *
 713          *  [2] : charge
 714          *  [3] : max charge
 715          *  [4] : current
 716          *  [5] : voltage
 717          *
 718          *  format 5:
 719          *
 720          *  [2][3] : charge
 721          *  [4][5] : max charge
 722          *  [6][7] : current
 723          *  [8][9] : voltage
 724          */
 725
 726         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 727         int amperage;
 728         unsigned int capa, max, voltage;
 729
 730         if (req->reply[1] & 0x01)
 731                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 732         else
 733                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 734
 735
 736         capa = max = amperage = voltage = 0;
 737
 738         if (req->reply[1] & 0x04) {
 739                 bat_flags |= PMU_BATT_PRESENT;
 740                 switch(req->reply[0]) {
 741                         case 3:
 742                         case 4: capa = req->reply[2];
 743                                 max = req->reply[3];
 744                                 amperage = *((signed char *)&req->reply[4]);
 745                                 voltage = req->reply[5];
 746                                 break;
 747                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 748                                 max = (req->reply[4] << 8) | req->reply[5];
 749                                 amperage = *((signed short *)&req->reply[6]);
 750                                 voltage = (req->reply[8] << 8) | req->reply[9];
 751                                 break;
 752                         default:
 753                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 754                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 755                                 break;
 756                 }
 757         }
 758
 759         if ((req->reply[1] & 0x01) && (amperage > 0))
 760                 bat_flags |= PMU_BATT_CHARGING;
 761
 762         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 763         pmu_batteries[pmu_cur_battery].charge = capa;
 764         pmu_batteries[pmu_cur_battery].max_charge = max;
 765         pmu_batteries[pmu_cur_battery].amperage = amperage;
 766         pmu_batteries[pmu_cur_battery].voltage = voltage;
 767         if (amperage) {
 768                 if ((req->reply[1] & 0x01) && (amperage > 0))
 769                         pmu_batteries[pmu_cur_battery].time_remaining
 770                                 = ((max-capa) * 3600) / amperage;
 771                 else
 772                         pmu_batteries[pmu_cur_battery].time_remaining
 773                                 = (capa * 3600) / (-amperage);
 774         } else
 775                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 776
 777         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 778
 779         clear_bit(0, &async_req_locks);
 780 }
 781
 782 static void
 783 query_battery_state(void)
 784 {
 785         if (test_and_set_bit(0, &async_req_locks))
 786                 return;
 787         if (pmu_kind == PMU_OHARE_BASED)
 788                 pmu_request(&batt_req, done_battery_state_ohare,
 789                         1, PMU_BATTERY_STATE);
 790         else
 791                 pmu_request(&batt_req, done_battery_state_smart,
 792                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 793 }
 794
 795 static int pmu_info_proc_show(struct seq_file *m, void *v)
 796 {
 797         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 798         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 799         seq_printf(m, "AC Power               : %d\n",
 800                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 801         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 802
 803         return 0;
 804 }
 805
 806 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 807 {
 808         return single_open(file, pmu_info_proc_show, NULL);
 809 }
 810
 811 static const struct file_operations pmu_info_proc_fops = {
 812         .owner          = THIS_MODULE,
 813         .open           = pmu_info_proc_open,
 814         .read           = seq_read,
 815         .llseek         = seq_lseek,
 816         .release        = single_release,
 817 };
 818
 819 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 820 {
 821         int i;
 822         static const char *irq_names[] = {
 823                 "Total CB1 triggered events",
 824                 "Total GPIO1 triggered events",
 825                 "PC-Card eject button",
 826                 "Sound/Brightness button",
 827                 "ADB message",
 828                 "Battery state change",
 829                 "Environment interrupt",
 830                 "Tick timer",
 831                 "Ghost interrupt (zero len)",
 832                 "Empty interrupt (empty mask)",
 833                 "Max irqs in a row"
 834         };
 835
 836         for (i=0; i<11; i++) {
 837                 seq_printf(m, " %2u: %10u (%s)\n",
 838                              i, pmu_irq_stats[i], irq_names[i]);
 839         }
 840         return 0;
 841 }
 842
 843 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 844 {
 845         return single_open(file, pmu_irqstats_proc_show, NULL);
 846 }
 847
 848 static const struct file_operations pmu_irqstats_proc_fops = {
 849         .owner          = THIS_MODULE,
 850         .open           = pmu_irqstats_proc_open,
 851         .read           = seq_read,
 852         .llseek         = seq_lseek,
 853         .release        = single_release,
 854 };
 855
 856 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 857 {
 858         long batnum = (long)m->private;
 859
 860         seq_putc(m, '\n');
 861         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 862         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 863         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 864         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 865         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 866         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 867         return 0;
 868 }
 869
 870 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 871 {
 872         return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
 873 }
 874
 875 static const struct file_operations pmu_battery_proc_fops = {
 876         .owner          = THIS_MODULE,
 877         .open           = pmu_battery_proc_open,
 878         .read           = seq_read,
 879         .llseek         = seq_lseek,
 880         .release        = single_release,
 881 };
 882
 883 static int pmu_options_proc_show(struct seq_file *m, void *v)
 884 {
 885 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 886         if (pmu_kind == PMU_KEYLARGO_BASED &&
 887             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 888                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 889 #endif
 890         if (pmu_kind == PMU_KEYLARGO_BASED)
 891                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 892
 893         return 0;
 894 }
 895
 896 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 897 {
 898         return single_open(file, pmu_options_proc_show, NULL);
 899 }
 900
 901 static ssize_t pmu_options_proc_write(struct file *file,
 902                 const char __user *buffer, size_t count, loff_t *pos)
 903 {
 904         char tmp[33];
 905         char *label, *val;
 906         size_t fcount = count;
 907
 908         if (!count)
 909                 return -EINVAL;
 910         if (count > 32)
 911                 count = 32;
 912         if (copy_from_user(tmp, buffer, count))
 913                 return -EFAULT;
 914         tmp[count] = 0;
 915
 916         label = tmp;
 917         while(*label == ' ')
 918                 label++;
 919         val = label;
 920         while(*val && (*val != '=')) {
 921                 if (*val == ' ')
 922                         *val = 0;
 923                 val++;
 924         }
 925         if ((*val) == 0)
 926                 return -EINVAL;
 927         *(val++) = 0;
 928         while(*val == ' ')
 929                 val++;
 930 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 931         if (pmu_kind == PMU_KEYLARGO_BASED &&
 932             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 933                 if (!strcmp(label, "lid_wakeup"))
 934                         option_lid_wakeup = ((*val) == '1');
 935 #endif
 936         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 937                 int new_value;
 938                 new_value = ((*val) == '1');
 939                 if (new_value != option_server_mode)
 940                         pmu_set_server_mode(new_value);
 941         }
 942         return fcount;
 943 }
 944
 945 static const struct file_operations pmu_options_proc_fops = {
 946         .owner          = THIS_MODULE,
 947         .open           = pmu_options_proc_open,
 948         .read           = seq_read,
 949         .llseek         = seq_lseek,
 950         .release        = single_release,
 951         .write          = pmu_options_proc_write,
 952 };
 953
 954 #ifdef CONFIG_ADB
 955 /* Send an ADB command */
 956 static int pmu_send_request(struct adb_request *req, int sync)
 957 {
 958         int i, ret;
 959
 960         if ((vias == NULL) || (!pmu_fully_inited)) {
 961                 req->complete = 1;
 962                 return -ENXIO;
 963         }
 964
 965         ret = -EINVAL;
 966
 967         switch (req->data[0]) {
 968         case PMU_PACKET:
 969                 for (i = 0; i < req->nbytes - 1; ++i)
 970                         req->data[i] = req->data[i+1];
 971                 --req->nbytes;
 972                 if (pmu_data_len[req->data[0]][1] != 0) {
 973                         req->reply[0] = ADB_RET_OK;
 974                         req->reply_len = 1;
 975                 } else
 976                         req->reply_len = 0;
 977                 ret = pmu_queue_request(req);
 978                 break;
 979         case CUDA_PACKET:
 980                 switch (req->data[1]) {
 981                 case CUDA_GET_TIME:
 982                         if (req->nbytes != 2)
 983                                 break;
 984                         req->data[0] = PMU_READ_RTC;
 985                         req->nbytes = 1;
 986                         req->reply_len = 3;
 987                         req->reply[0] = CUDA_PACKET;
 988                         req->reply[1] = 0;
 989                         req->reply[2] = CUDA_GET_TIME;
 990                         ret = pmu_queue_request(req);
 991                         break;
 992                 case CUDA_SET_TIME:
 993                         if (req->nbytes != 6)
 994                                 break;
 995                         req->data[0] = PMU_SET_RTC;
 996                         req->nbytes = 5;
 997                         for (i = 1; i <= 4; ++i)
 998                                 req->data[i] = req->data[i+1];
 999                         req->reply_len = 3;
1000                         req->reply[0] = CUDA_PACKET;
1001                         req->reply[1] = 0;
1002                         req->reply[2] = CUDA_SET_TIME;
1003                         ret = pmu_queue_request(req);
1004                         break;
1005                 }
1006                 break;
1007         case ADB_PACKET:
1008                 if (!pmu_has_adb)
1009                         return -ENXIO;
1010                 for (i = req->nbytes - 1; i > 1; --i)
1011                         req->data[i+2] = req->data[i];
1012                 req->data[3] = req->nbytes - 2;
1013                 req->data[2] = pmu_adb_flags;
1014                 /*req->data[1] = req->data[1];*/
1015                 req->data[0] = PMU_ADB_CMD;
1016                 req->nbytes += 2;
1017                 req->reply_expected = 1;
1018                 req->reply_len = 0;
1019                 ret = pmu_queue_request(req);
1020                 break;
1021         }
1022         if (ret) {
1023                 req->complete = 1;
1024                 return ret;
1025         }
1026
1027         if (sync)
1028                 while (!req->complete)
1029                         pmu_poll();
1030
1031         return 0;
1032 }
1033
1034 /* Enable/disable autopolling */
1035 static int __pmu_adb_autopoll(int devs)
1036 {
1037         struct adb_request req;
1038
1039         if (devs) {
1040                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1041                             adb_dev_map >> 8, adb_dev_map);
1042                 pmu_adb_flags = 2;
1043         } else {
1044                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1045                 pmu_adb_flags = 0;
1046         }
1047         while (!req.complete)
1048                 pmu_poll();
1049         return 0;
1050 }
1051
1052 static int pmu_adb_autopoll(int devs)
1053 {
1054         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1055                 return -ENXIO;
1056
1057         adb_dev_map = devs;
1058         return __pmu_adb_autopoll(devs);
1059 }
1060
1061 /* Reset the ADB bus */
1062 static int pmu_adb_reset_bus(void)
1063 {
1064         struct adb_request req;
1065         int save_autopoll = adb_dev_map;
1066
1067         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1068                 return -ENXIO;
1069
1070         /* anyone got a better idea?? */
1071         __pmu_adb_autopoll(0);
1072
1073         req.nbytes = 4;
1074         req.done = NULL;
1075         req.data[0] = PMU_ADB_CMD;
1076         req.data[1] = ADB_BUSRESET;
1077         req.data[2] = 0;
1078         req.data[3] = 0;
1079         req.data[4] = 0;
1080         req.reply_len = 0;
1081         req.reply_expected = 1;
1082         if (pmu_queue_request(&req) != 0) {
1083                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1084                 return -EIO;
1085         }
1086         pmu_wait_complete(&req);
1087
1088         if (save_autopoll != 0)
1089                 __pmu_adb_autopoll(save_autopoll);
1090
1091         return 0;
1092 }
1093 #endif /* CONFIG_ADB */
1094
1095 /* Construct and send a pmu request */
1096 int
1097 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1098             int nbytes, ...)
1099 {
1100         va_list list;
1101         int i;
1102
1103         if (vias == NULL)
1104                 return -ENXIO;
1105
1106         if (nbytes < 0 || nbytes > 32) {
1107                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1108                 req->complete = 1;
1109                 return -EINVAL;
1110         }
1111         req->nbytes = nbytes;
1112         req->done = done;
1113         va_start(list, nbytes);
1114         for (i = 0; i < nbytes; ++i)
1115                 req->data[i] = va_arg(list, int);
1116         va_end(list);
1117         req->reply_len = 0;
1118         req->reply_expected = 0;
1119         return pmu_queue_request(req);
1120 }
1121
1122 int
1123 pmu_queue_request(struct adb_request *req)
1124 {
1125         unsigned long flags;
1126         int nsend;
1127
1128         if (via == NULL) {
1129                 req->complete = 1;
1130                 return -ENXIO;
1131         }
1132         if (req->nbytes <= 0) {
1133                 req->complete = 1;
1134                 return 0;
1135         }
1136         nsend = pmu_data_len[req->data[0]][0];
1137         if (nsend >= 0 && req->nbytes != nsend + 1) {
1138                 req->complete = 1;
1139                 return -EINVAL;
1140         }
1141
1142         req->next = NULL;
1143         req->sent = 0;
1144         req->complete = 0;
1145
1146         spin_lock_irqsave(&pmu_lock, flags);
1147         if (current_req != 0) {
1148                 last_req->next = req;
1149                 last_req = req;
1150         } else {
1151                 current_req = req;
1152                 last_req = req;
1153                 if (pmu_state == idle)
1154                         pmu_start();
1155         }
1156         spin_unlock_irqrestore(&pmu_lock, flags);
1157
1158         return 0;
1159 }
1160
1161 static inline void
1162 wait_for_ack(void)
1163 {
1164         /* Sightly increased the delay, I had one occurrence of the message
1165          * reported
1166          */
1167         int timeout = 4000;
1168         while ((in_8(&via[B]) & TACK) == 0) {
1169                 if (--timeout < 0) {
1170                         printk(KERN_ERR "PMU not responding (!ack)\n");
1171                         return;
1172                 }
1173                 udelay(10);
1174         }
1175 }
1176
1177 /* New PMU seems to be very sensitive to those timings, so we make sure
1178  * PCI is flushed immediately */
1179 static inline void
1180 send_byte(int x)
1181 {
1182         volatile unsigned char __iomem *v = via;
1183
1184         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1185         out_8(&v[SR], x);
1186         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1187         (void)in_8(&v[B]);
1188 }
1189
1190 static inline void
1191 recv_byte(void)
1192 {
1193         volatile unsigned char __iomem *v = via;
1194
1195         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1196         in_8(&v[SR]);           /* resets SR */
1197         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1198         (void)in_8(&v[B]);
1199 }
1200
1201 static inline void
1202 pmu_done(struct adb_request *req)
1203 {
1204         void (*done)(struct adb_request *) = req->done;
1205         mb();
1206         req->complete = 1;
1207         /* Here, we assume that if the request has a done member, the
1208          * struct request will survive to setting req->complete to 1
1209          */
1210         if (done)
1211                 (*done)(req);
1212 }
1213
1214 static void
1215 pmu_start(void)
1216 {
1217         struct adb_request *req;
1218
1219         /* assert pmu_state == idle */
1220         /* get the packet to send */
1221         req = current_req;
1222         if (req == 0 || pmu_state != idle
1223             || (/*req->reply_expected && */req_awaiting_reply))
1224                 return;
1225
1226         pmu_state = sending;
1227         data_index = 1;
1228         data_len = pmu_data_len[req->data[0]][0];
1229
1230         /* Sounds safer to make sure ACK is high before writing. This helped
1231          * kill a problem with ADB and some iBooks
1232          */
1233         wait_for_ack();
1234         /* set the shift register to shift out and send a byte */
1235         send_byte(req->data[0]);
1236 }
1237
1238 void
1239 pmu_poll(void)
1240 {
1241         if (!via)
1242                 return;
1243         if (disable_poll)
1244                 return;
1245         via_pmu_interrupt(0, NULL);
1246 }
1247
1248 void
1249 pmu_poll_adb(void)
1250 {
1251         if (!via)
1252                 return;
1253         if (disable_poll)
1254                 return;
1255         /* Kicks ADB read when PMU is suspended */
1256         adb_int_pending = 1;
1257         do {
1258                 via_pmu_interrupt(0, NULL);
1259         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1260                 || req_awaiting_reply));
1261 }
1262
1263 void
1264 pmu_wait_complete(struct adb_request *req)
1265 {
1266         if (!via)
1267                 return;
1268         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1269                 via_pmu_interrupt(0, NULL);
1270 }
1271
1272 /* This function loops until the PMU is idle and prevents it from
1273  * anwsering to ADB interrupts. pmu_request can still be called.
1274  * This is done to avoid spurrious shutdowns when we know we'll have
1275  * interrupts switched off for a long time
1276  */
1277 void
1278 pmu_suspend(void)
1279 {
1280         unsigned long flags;
1281
1282         if (!via)
1283                 return;
1284
1285         spin_lock_irqsave(&pmu_lock, flags);
1286         pmu_suspended++;
1287         if (pmu_suspended > 1) {
1288                 spin_unlock_irqrestore(&pmu_lock, flags);
1289                 return;
1290         }
1291
1292         do {
1293                 spin_unlock_irqrestore(&pmu_lock, flags);
1294                 if (req_awaiting_reply)
1295                         adb_int_pending = 1;
1296                 via_pmu_interrupt(0, NULL);
1297                 spin_lock_irqsave(&pmu_lock, flags);
1298                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1299                         if (gpio_irq >= 0)
1300                                 disable_irq_nosync(gpio_irq);
1301                         out_8(&via[IER], CB1_INT | IER_CLR);
1302                         spin_unlock_irqrestore(&pmu_lock, flags);
1303                         break;
1304                 }
1305         } while (1);
1306 }
1307
1308 void
1309 pmu_resume(void)
1310 {
1311         unsigned long flags;
1312
1313         if (!via || (pmu_suspended < 1))
1314                 return;
1315
1316         spin_lock_irqsave(&pmu_lock, flags);
1317         pmu_suspended--;
1318         if (pmu_suspended > 0) {
1319                 spin_unlock_irqrestore(&pmu_lock, flags);
1320                 return;
1321         }
1322         adb_int_pending = 1;
1323         if (gpio_irq >= 0)
1324                 enable_irq(gpio_irq);
1325         out_8(&via[IER], CB1_INT | IER_SET);
1326         spin_unlock_irqrestore(&pmu_lock, flags);
1327         pmu_poll();
1328 }
1329
1330 /* Interrupt data could be the result data from an ADB cmd */
1331 static void
1332 pmu_handle_data(unsigned char *data, int len)
1333 {
1334         unsigned char ints, pirq;
1335         int i = 0;
1336
1337         asleep = 0;
1338         if (drop_interrupts || len < 1) {
1339                 adb_int_pending = 0;
1340                 pmu_irq_stats[8]++;
1341                 return;
1342         }
1343
1344         /* Get PMU interrupt mask */
1345         ints = data[0];
1346
1347         /* Record zero interrupts for stats */
1348         if (ints == 0)
1349                 pmu_irq_stats[9]++;
1350
1351         /* Hack to deal with ADB autopoll flag */
1352         if (ints & PMU_INT_ADB)
1353                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1354
1355 next:
1356
1357         if (ints == 0) {
1358                 if (i > pmu_irq_stats[10])
1359                         pmu_irq_stats[10] = i;
1360                 return;
1361         }
1362
1363         for (pirq = 0; pirq < 8; pirq++)
1364                 if (ints & (1 << pirq))
1365                         break;
1366         pmu_irq_stats[pirq]++;
1367         i++;
1368         ints &= ~(1 << pirq);
1369
1370         /* Note: for some reason, we get an interrupt with len=1,
1371          * data[0]==0 after each normal ADB interrupt, at least
1372          * on the Pismo. Still investigating...  --BenH
1373          */
1374         if ((1 << pirq) & PMU_INT_ADB) {
1375                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1376                         struct adb_request *req = req_awaiting_reply;
1377                         if (req == 0) {
1378                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1379                                 return;
1380                         }
1381                         req_awaiting_reply = NULL;
1382                         if (len <= 2)
1383                                 req->reply_len = 0;
1384                         else {
1385                                 memcpy(req->reply, data + 1, len - 1);
1386                                 req->reply_len = len - 1;
1387                         }
1388                         pmu_done(req);
1389                 } else {
1390                         if (len == 4 && data[1] == 0x2c) {
1391                                 extern int xmon_wants_key, xmon_adb_keycode;
1392                                 if (xmon_wants_key) {
1393                                         xmon_adb_keycode = data[2];
1394                                         return;
1395                                 }
1396                         }
1397 #ifdef CONFIG_ADB
1398                         /*
1399                          * XXX On the [23]400 the PMU gives us an up
1400                          * event for keycodes 0x74 or 0x75 when the PC
1401                          * card eject buttons are released, so we
1402                          * ignore those events.
1403                          */
1404                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1405                               && data[1] == 0x2c && data[3] == 0xff
1406                               && (data[2] & ~1) == 0xf4))
1407                                 adb_input(data+1, len-1, 1);
1408 #endif /* CONFIG_ADB */
1409                 }
1410         }
1411         /* Sound/brightness button pressed */
1412         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1413 #ifdef CONFIG_PMAC_BACKLIGHT
1414                 if (len == 3)
1415                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1416 #endif
1417         }
1418         /* Tick interrupt */
1419         else if ((1 << pirq) & PMU_INT_TICK) {
1420                 /* Environement or tick interrupt, query batteries */
1421                 if (pmu_battery_count) {
1422                         if ((--query_batt_timer) == 0) {
1423                                 query_battery_state();
1424                                 query_batt_timer = BATTERY_POLLING_COUNT;
1425                         }
1426                 }
1427         }
1428         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1429                 if (pmu_battery_count)
1430                         query_battery_state();
1431                 pmu_pass_intr(data, len);
1432                 /* len == 6 is probably a bad check. But how do I
1433                  * know what PMU versions send what events here? */
1434                 if (len == 6) {
1435                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1436                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1437                 }
1438         } else {
1439                pmu_pass_intr(data, len);
1440         }
1441         goto next;
1442 }
1443
1444 static struct adb_request*
1445 pmu_sr_intr(void)
1446 {
1447         struct adb_request *req;
1448         int bite = 0;
1449
1450         if (via[B] & TREQ) {
1451                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1452                 out_8(&via[IFR], SR_INT);
1453                 return NULL;
1454         }
1455         /* The ack may not yet be low when we get the interrupt */
1456         while ((in_8(&via[B]) & TACK) != 0)
1457                         ;
1458
1459         /* if reading grab the byte, and reset the interrupt */
1460         if (pmu_state == reading || pmu_state == reading_intr)
1461                 bite = in_8(&via[SR]);
1462
1463         /* reset TREQ and wait for TACK to go high */
1464         out_8(&via[B], in_8(&via[B]) | TREQ);
1465         wait_for_ack();
1466
1467         switch (pmu_state) {
1468         case sending:
1469                 req = current_req;
1470                 if (data_len < 0) {
1471                         data_len = req->nbytes - 1;
1472                         send_byte(data_len);
1473                         break;
1474                 }
1475                 if (data_index <= data_len) {
1476                         send_byte(req->data[data_index++]);
1477                         break;
1478                 }
1479                 req->sent = 1;
1480                 data_len = pmu_data_len[req->data[0]][1];
1481                 if (data_len == 0) {
1482                         pmu_state = idle;
1483                         current_req = req->next;
1484                         if (req->reply_expected)
1485                                 req_awaiting_reply = req;
1486                         else
1487                                 return req;
1488                 } else {
1489                         pmu_state = reading;
1490                         data_index = 0;
1491                         reply_ptr = req->reply + req->reply_len;
1492                         recv_byte();
1493                 }
1494                 break;
1495
1496         case intack:
1497                 data_index = 0;
1498                 data_len = -1;
1499                 pmu_state = reading_intr;
1500                 reply_ptr = interrupt_data[int_data_last];
1501                 recv_byte();
1502                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1503                         enable_irq(gpio_irq);
1504                         gpio_irq_enabled = 1;
1505                 }
1506                 break;
1507
1508         case reading:
1509         case reading_intr:
1510                 if (data_len == -1) {
1511                         data_len = bite;
1512                         if (bite > 32)
1513                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1514                 } else if (data_index < 32) {
1515                         reply_ptr[data_index++] = bite;
1516                 }
1517                 if (data_index < data_len) {
1518                         recv_byte();
1519                         break;
1520                 }
1521
1522                 if (pmu_state == reading_intr) {
1523                         pmu_state = idle;
1524                         int_data_state[int_data_last] = int_data_ready;
1525                         interrupt_data_len[int_data_last] = data_len;
1526                 } else {
1527                         req = current_req;
1528                         /*
1529                          * For PMU sleep and freq change requests, we lock the
1530                          * PMU until it's explicitly unlocked. This avoids any
1531                          * spurrious event polling getting in
1532                          */
1533                         current_req = req->next;
1534                         req->reply_len += data_index;
1535                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1536                                 pmu_state = locked;
1537                         else
1538                                 pmu_state = idle;
1539                         return req;
1540                 }
1541                 break;
1542
1543         default:
1544                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1545                        pmu_state);
1546         }
1547         return NULL;
1548 }
1549
1550 static irqreturn_t
1551 via_pmu_interrupt(int irq, void *arg)
1552 {
1553         unsigned long flags;
1554         int intr;
1555         int nloop = 0;
1556         int int_data = -1;
1557         struct adb_request *req = NULL;
1558         int handled = 0;
1559
1560         /* This is a bit brutal, we can probably do better */
1561         spin_lock_irqsave(&pmu_lock, flags);
1562         ++disable_poll;
1563
1564         for (;;) {
1565                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1566                 if (intr == 0)
1567                         break;
1568                 handled = 1;
1569                 if (++nloop > 1000) {
1570                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1571                                "intr=%x, ier=%x pmu_state=%d\n",
1572                                intr, in_8(&via[IER]), pmu_state);
1573                         break;
1574                 }
1575                 out_8(&via[IFR], intr);
1576                 if (intr & CB1_INT) {
1577                         adb_int_pending = 1;
1578                         pmu_irq_stats[0]++;
1579                 }
1580                 if (intr & SR_INT) {
1581                         req = pmu_sr_intr();
1582                         if (req)
1583                                 break;
1584                 }
1585         }
1586
1587 recheck:
1588         if (pmu_state == idle) {
1589                 if (adb_int_pending) {
1590                         if (int_data_state[0] == int_data_empty)
1591                                 int_data_last = 0;
1592                         else if (int_data_state[1] == int_data_empty)
1593                                 int_data_last = 1;
1594                         else
1595                                 goto no_free_slot;
1596                         pmu_state = intack;
1597                         int_data_state[int_data_last] = int_data_fill;
1598                         /* Sounds safer to make sure ACK is high before writing.
1599                          * This helped kill a problem with ADB and some iBooks
1600                          */
1601                         wait_for_ack();
1602                         send_byte(PMU_INT_ACK);
1603                         adb_int_pending = 0;
1604                 } else if (current_req)
1605                         pmu_start();
1606         }
1607 no_free_slot:
1608         /* Mark the oldest buffer for flushing */
1609         if (int_data_state[!int_data_last] == int_data_ready) {
1610                 int_data_state[!int_data_last] = int_data_flush;
1611                 int_data = !int_data_last;
1612         } else if (int_data_state[int_data_last] == int_data_ready) {
1613                 int_data_state[int_data_last] = int_data_flush;
1614                 int_data = int_data_last;
1615         }
1616         --disable_poll;
1617         spin_unlock_irqrestore(&pmu_lock, flags);
1618
1619         /* Deal with completed PMU requests outside of the lock */
1620         if (req) {
1621                 pmu_done(req);
1622                 req = NULL;
1623         }
1624
1625         /* Deal with interrupt datas outside of the lock */
1626         if (int_data >= 0) {
1627                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1628                 spin_lock_irqsave(&pmu_lock, flags);
1629                 ++disable_poll;
1630                 int_data_state[int_data] = int_data_empty;
1631                 int_data = -1;
1632                 goto recheck;
1633         }
1634
1635         return IRQ_RETVAL(handled);
1636 }
1637
1638 void
1639 pmu_unlock(void)
1640 {
1641         unsigned long flags;
1642
1643         spin_lock_irqsave(&pmu_lock, flags);
1644         if (pmu_state == locked)
1645                 pmu_state = idle;
1646         adb_int_pending = 1;
1647         spin_unlock_irqrestore(&pmu_lock, flags);
1648 }
1649
1650
1651 static irqreturn_t
1652 gpio1_interrupt(int irq, void *arg)
1653 {
1654         unsigned long flags;
1655
1656         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1657                 spin_lock_irqsave(&pmu_lock, flags);
1658                 if (gpio_irq_enabled > 0) {
1659                         disable_irq_nosync(gpio_irq);
1660                         gpio_irq_enabled = 0;
1661                 }
1662                 pmu_irq_stats[1]++;
1663                 adb_int_pending = 1;
1664                 spin_unlock_irqrestore(&pmu_lock, flags);
1665                 via_pmu_interrupt(0, NULL);
1666                 return IRQ_HANDLED;
1667         }
1668         return IRQ_NONE;
1669 }
1670
1671 void
1672 pmu_enable_irled(int on)
1673 {
1674         struct adb_request req;
1675
1676         if (vias == NULL)
1677                 return ;
1678         if (pmu_kind == PMU_KEYLARGO_BASED)
1679                 return ;
1680
1681         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1682             (on ? PMU_POW_ON : PMU_POW_OFF));
1683         pmu_wait_complete(&req);
1684 }
1685
1686 void
1687 pmu_restart(void)
1688 {
1689         struct adb_request req;
1690
1691         if (via == NULL)
1692                 return;
1693
1694         local_irq_disable();
1695
1696         drop_interrupts = 1;
1697
1698         if (pmu_kind != PMU_KEYLARGO_BASED) {
1699                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1700                                                 PMU_INT_TICK );
1701                 while(!req.complete)
1702                         pmu_poll();
1703         }
1704
1705         pmu_request(&req, NULL, 1, PMU_RESET);
1706         pmu_wait_complete(&req);
1707         for (;;)
1708                 ;
1709 }
1710
1711 void
1712 pmu_shutdown(void)
1713 {
1714         struct adb_request req;
1715
1716         if (via == NULL)
1717                 return;
1718
1719         local_irq_disable();
1720
1721         drop_interrupts = 1;
1722
1723         if (pmu_kind != PMU_KEYLARGO_BASED) {
1724                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1725                                                 PMU_INT_TICK );
1726                 pmu_wait_complete(&req);
1727         } else {
1728                 /* Disable server mode on shutdown or we'll just
1729                  * wake up again
1730                  */
1731                 pmu_set_server_mode(0);
1732         }
1733
1734         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1735                     'M', 'A', 'T', 'T');
1736         pmu_wait_complete(&req);
1737         for (;;)
1738                 ;
1739 }
1740
1741 int
1742 pmu_present(void)
1743 {
1744         return via != 0;
1745 }
1746
1747 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1748 /*
1749  * Put the powerbook to sleep.
1750  */
1751
1752 static u32 save_via[8];
1753
1754 static void
1755 save_via_state(void)
1756 {
1757         save_via[0] = in_8(&via[ANH]);
1758         save_via[1] = in_8(&via[DIRA]);
1759         save_via[2] = in_8(&via[B]);
1760         save_via[3] = in_8(&via[DIRB]);
1761         save_via[4] = in_8(&via[PCR]);
1762         save_via[5] = in_8(&via[ACR]);
1763         save_via[6] = in_8(&via[T1CL]);
1764         save_via[7] = in_8(&via[T1CH]);
1765 }
1766 static void
1767 restore_via_state(void)
1768 {
1769         out_8(&via[ANH], save_via[0]);
1770         out_8(&via[DIRA], save_via[1]);
1771         out_8(&via[B], save_via[2]);
1772         out_8(&via[DIRB], save_via[3]);
1773         out_8(&via[PCR], save_via[4]);
1774         out_8(&via[ACR], save_via[5]);
1775         out_8(&via[T1CL], save_via[6]);
1776         out_8(&via[T1CH], save_via[7]);
1777         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1778         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1779         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1780 }
1781
1782 #define GRACKLE_PM      (1<<7)
1783 #define GRACKLE_DOZE    (1<<5)
1784 #define GRACKLE_NAP     (1<<4)
1785 #define GRACKLE_SLEEP   (1<<3)
1786
1787 static int powerbook_sleep_grackle(void)
1788 {
1789         unsigned long save_l2cr;
1790         unsigned short pmcr1;
1791         struct adb_request req;
1792         struct pci_dev *grackle;
1793
1794         grackle = pci_get_bus_and_slot(0, 0);
1795         if (!grackle)
1796                 return -ENODEV;
1797
1798         /* Turn off various things. Darwin does some retry tests here... */
1799         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1800         pmu_wait_complete(&req);
1801         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1802                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1803         pmu_wait_complete(&req);
1804
1805         /* For 750, save backside cache setting and disable it */
1806         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1807
1808         if (!__fake_sleep) {
1809                 /* Ask the PMU to put us to sleep */
1810                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1811                 pmu_wait_complete(&req);
1812         }
1813
1814         /* The VIA is supposed not to be restored correctly*/
1815         save_via_state();
1816         /* We shut down some HW */
1817         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1818
1819         pci_read_config_word(grackle, 0x70, &pmcr1);
1820         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1821         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1822         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1823         pci_write_config_word(grackle, 0x70, pmcr1);
1824
1825         /* Call low-level ASM sleep handler */
1826         if (__fake_sleep)
1827                 mdelay(5000);
1828         else
1829                 low_sleep_handler();
1830
1831         /* We're awake again, stop grackle PM */
1832         pci_read_config_word(grackle, 0x70, &pmcr1);
1833         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1834         pci_write_config_word(grackle, 0x70, pmcr1);
1835
1836         pci_dev_put(grackle);
1837
1838         /* Make sure the PMU is idle */
1839         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1840         restore_via_state();
1841
1842         /* Restore L2 cache */
1843         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1844                 _set_L2CR(save_l2cr);
1845
1846         /* Restore userland MMU context */
1847         switch_mmu_context(NULL, current->active_mm);
1848
1849         /* Power things up */
1850         pmu_unlock();
1851         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1852         pmu_wait_complete(&req);
1853         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1854                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1855         pmu_wait_complete(&req);
1856         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1857                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1858         pmu_wait_complete(&req);
1859
1860         return 0;
1861 }
1862
1863 static int
1864 powerbook_sleep_Core99(void)
1865 {
1866         unsigned long save_l2cr;
1867         unsigned long save_l3cr;
1868         struct adb_request req;
1869
1870         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1871                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1872                 return -ENOSYS;
1873         }
1874
1875         if (num_online_cpus() > 1 || cpu_is_offline(0))
1876                 return -EAGAIN;
1877
1878         /* Stop environment and ADB interrupts */
1879         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1880         pmu_wait_complete(&req);
1881
1882         /* Tell PMU what events will wake us up */
1883         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1884                 0xff, 0xff);
1885         pmu_wait_complete(&req);
1886         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1887                 0, PMU_PWR_WAKEUP_KEY |
1888                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1889         pmu_wait_complete(&req);
1890
1891         /* Save the state of the L2 and L3 caches */
1892         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1893         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1894
1895         if (!__fake_sleep) {
1896                 /* Ask the PMU to put us to sleep */
1897                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1898                 pmu_wait_complete(&req);
1899         }
1900
1901         /* The VIA is supposed not to be restored correctly*/
1902         save_via_state();
1903
1904         /* Shut down various ASICs. There's a chance that we can no longer
1905          * talk to the PMU after this, so I moved it to _after_ sending the
1906          * sleep command to it. Still need to be checked.
1907          */
1908         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1909
1910         /* Call low-level ASM sleep handler */
1911         if (__fake_sleep)
1912                 mdelay(5000);
1913         else
1914                 low_sleep_handler();
1915
1916         /* Restore Apple core ASICs state */
1917         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1918
1919         /* Restore VIA */
1920         restore_via_state();
1921
1922         /* tweak LPJ before cpufreq is there */
1923         loops_per_jiffy *= 2;
1924
1925         /* Restore video */
1926         pmac_call_early_video_resume();
1927
1928         /* Restore L2 cache */
1929         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1930                 _set_L2CR(save_l2cr);
1931         /* Restore L3 cache */
1932         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1933                 _set_L3CR(save_l3cr);
1934
1935         /* Restore userland MMU context */
1936         switch_mmu_context(NULL, current->active_mm);
1937
1938         /* Tell PMU we are ready */
1939         pmu_unlock();
1940         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1941         pmu_wait_complete(&req);
1942         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1943         pmu_wait_complete(&req);
1944
1945         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1946         loops_per_jiffy /= 2;
1947
1948         return 0;
1949 }
1950
1951 #define PB3400_MEM_CTRL         0xf8000000
1952 #define PB3400_MEM_CTRL_SLEEP   0x70
1953
1954 static void __iomem *pb3400_mem_ctrl;
1955
1956 static void powerbook_sleep_init_3400(void)
1957 {
1958         /* map in the memory controller registers */
1959         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1960         if (pb3400_mem_ctrl == NULL)
1961                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1962 }
1963
1964 static int powerbook_sleep_3400(void)
1965 {
1966         int i, x;
1967         unsigned int hid0;
1968         unsigned long msr;
1969         struct adb_request sleep_req;
1970         unsigned int __iomem *mem_ctrl_sleep;
1971
1972         if (pb3400_mem_ctrl == NULL)
1973                 return -ENOMEM;
1974         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1975
1976         /* Set the memory controller to keep the memory refreshed
1977            while we're asleep */
1978         for (i = 0x403f; i >= 0x4000; --i) {
1979                 out_be32(mem_ctrl_sleep, i);
1980                 do {
1981                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1982                 } while (x == 0);
1983                 if (x >= 0x100)
1984                         break;
1985         }
1986
1987         /* Ask the PMU to put us to sleep */
1988         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1989         pmu_wait_complete(&sleep_req);
1990         pmu_unlock();
1991
1992         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1993
1994         asleep = 1;
1995
1996         /* Put the CPU into sleep mode */
1997         hid0 = mfspr(SPRN_HID0);
1998         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1999         mtspr(SPRN_HID0, hid0);
2000         local_irq_enable();
2001         msr = mfmsr() | MSR_POW;
2002         while (asleep) {
2003                 mb();
2004                 mtmsr(msr);
2005                 isync();
2006         }
2007         local_irq_disable();
2008
2009         /* OK, we're awake again, start restoring things */
2010         out_be32(mem_ctrl_sleep, 0x3f);
2011         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2012
2013         return 0;
2014 }
2015
2016 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2017
2018 /*
2019  * Support for /dev/pmu device
2020  */
2021 #define RB_SIZE         0x10
2022 struct pmu_private {
2023         struct list_head list;
2024         int     rb_get;
2025         int     rb_put;
2026         struct rb_entry {
2027                 unsigned short len;
2028                 unsigned char data[16];
2029         }       rb_buf[RB_SIZE];
2030         wait_queue_head_t wait;
2031         spinlock_t lock;
2032 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2033         int     backlight_locker;
2034 #endif
2035 };
2036
2037 static LIST_HEAD(all_pmu_pvt);
2038 static DEFINE_SPINLOCK(all_pvt_lock);
2039
2040 static void
2041 pmu_pass_intr(unsigned char *data, int len)
2042 {
2043         struct pmu_private *pp;
2044         struct list_head *list;
2045         int i;
2046         unsigned long flags;
2047
2048         if (len > sizeof(pp->rb_buf[0].data))
2049                 len = sizeof(pp->rb_buf[0].data);
2050         spin_lock_irqsave(&all_pvt_lock, flags);
2051         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2052                 pp = list_entry(list, struct pmu_private, list);
2053                 spin_lock(&pp->lock);
2054                 i = pp->rb_put + 1;
2055                 if (i >= RB_SIZE)
2056                         i = 0;
2057                 if (i != pp->rb_get) {
2058                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2059                         rp->len = len;
2060                         memcpy(rp->data, data, len);
2061                         pp->rb_put = i;
2062                         wake_up_interruptible(&pp->wait);
2063                 }
2064                 spin_unlock(&pp->lock);
2065         }
2066         spin_unlock_irqrestore(&all_pvt_lock, flags);
2067 }
2068
2069 static int
2070 pmu_open(struct inode *inode, struct file *file)
2071 {
2072         struct pmu_private *pp;
2073         unsigned long flags;
2074
2075         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2076         if (pp == 0)
2077                 return -ENOMEM;
2078         pp->rb_get = pp->rb_put = 0;
2079         spin_lock_init(&pp->lock);
2080         init_waitqueue_head(&pp->wait);
2081         lock_kernel();
2082         spin_lock_irqsave(&all_pvt_lock, flags);
2083 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2084         pp->backlight_locker = 0;
2085 #endif
2086         list_add(&pp->list, &all_pmu_pvt);
2087         spin_unlock_irqrestore(&all_pvt_lock, flags);
2088         file->private_data = pp;
2089         unlock_kernel();
2090         return 0;
2091 }
2092
2093 static ssize_t
2094 pmu_read(struct file *file, char __user *buf,
2095                         size_t count, loff_t *ppos)
2096 {
2097         struct pmu_private *pp = file->private_data;
2098         DECLARE_WAITQUEUE(wait, current);
2099         unsigned long flags;
2100         int ret = 0;
2101
2102         if (count < 1 || pp == 0)
2103                 return -EINVAL;
2104         if (!access_ok(VERIFY_WRITE, buf, count))
2105                 return -EFAULT;
2106
2107         spin_lock_irqsave(&pp->lock, flags);
2108         add_wait_queue(&pp->wait, &wait);
2109         current->state = TASK_INTERRUPTIBLE;
2110
2111         for (;;) {
2112                 ret = -EAGAIN;
2113                 if (pp->rb_get != pp->rb_put) {
2114                         int i = pp->rb_get;
2115                         struct rb_entry *rp = &pp->rb_buf[i];
2116                         ret = rp->len;
2117                         spin_unlock_irqrestore(&pp->lock, flags);
2118                         if (ret > count)
2119                                 ret = count;
2120                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2121                                 ret = -EFAULT;
2122                         if (++i >= RB_SIZE)
2123                                 i = 0;
2124                         spin_lock_irqsave(&pp->lock, flags);
2125                         pp->rb_get = i;
2126                 }
2127                 if (ret >= 0)
2128                         break;
2129                 if (file->f_flags & O_NONBLOCK)
2130                         break;
2131                 ret = -ERESTARTSYS;
2132                 if (signal_pending(current))
2133                         break;
2134                 spin_unlock_irqrestore(&pp->lock, flags);
2135                 schedule();
2136                 spin_lock_irqsave(&pp->lock, flags);
2137         }
2138         current->state = TASK_RUNNING;
2139         remove_wait_queue(&pp->wait, &wait);
2140         spin_unlock_irqrestore(&pp->lock, flags);
2141
2142         return ret;
2143 }
2144
2145 static ssize_t
2146 pmu_write(struct file *file, const char __user *buf,
2147                          size_t count, loff_t *ppos)
2148 {
2149         return 0;
2150 }
2151
2152 static unsigned int
2153 pmu_fpoll(struct file *filp, poll_table *wait)
2154 {
2155         struct pmu_private *pp = filp->private_data;
2156         unsigned int mask = 0;
2157         unsigned long flags;
2158
2159         if (pp == 0)
2160                 return 0;
2161         poll_wait(filp, &pp->wait, wait);
2162         spin_lock_irqsave(&pp->lock, flags);
2163         if (pp->rb_get != pp->rb_put)
2164                 mask |= POLLIN;
2165         spin_unlock_irqrestore(&pp->lock, flags);
2166         return mask;
2167 }
2168
2169 static int
2170 pmu_release(struct inode *inode, struct file *file)
2171 {
2172         struct pmu_private *pp = file->private_data;
2173         unsigned long flags;
2174
2175         if (pp != 0) {
2176                 file->private_data = NULL;
2177                 spin_lock_irqsave(&all_pvt_lock, flags);
2178                 list_del(&pp->list);
2179                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2180
2181 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2182                 if (pp->backlight_locker)
2183                         pmac_backlight_enable();
2184 #endif
2185
2186                 kfree(pp);
2187         }
2188         return 0;
2189 }
2190
2191 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2192 static void pmac_suspend_disable_irqs(void)
2193 {
2194         /* Call platform functions marked "on sleep" */
2195         pmac_pfunc_i2c_suspend();
2196         pmac_pfunc_base_suspend();
2197 }
2198
2199 static int powerbook_sleep(suspend_state_t state)
2200 {
2201         int error = 0;
2202
2203         /* Wait for completion of async requests */
2204         while (!batt_req.complete)
2205                 pmu_poll();
2206
2207         /* Giveup the lazy FPU & vec so we don't have to back them
2208          * up from the low level code
2209          */
2210         enable_kernel_fp();
2211
2212 #ifdef CONFIG_ALTIVEC
2213         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2214                 enable_kernel_altivec();
2215 #endif /* CONFIG_ALTIVEC */
2216
2217         switch (pmu_kind) {
2218         case PMU_OHARE_BASED:
2219                 error = powerbook_sleep_3400();
2220                 break;
2221         case PMU_HEATHROW_BASED:
2222         case PMU_PADDINGTON_BASED:
2223                 error = powerbook_sleep_grackle();
2224                 break;
2225         case PMU_KEYLARGO_BASED:
2226                 error = powerbook_sleep_Core99();
2227                 break;
2228         default:
2229                 return -ENOSYS;
2230         }
2231
2232         if (error)
2233                 return error;
2234
2235         mdelay(100);
2236
2237         return 0;
2238 }
2239
2240 static void pmac_suspend_enable_irqs(void)
2241 {
2242         /* Force a poll of ADB interrupts */
2243         adb_int_pending = 1;
2244         via_pmu_interrupt(0, NULL);
2245
2246         mdelay(10);
2247
2248         /* Call platform functions marked "on wake" */
2249         pmac_pfunc_base_resume();
2250         pmac_pfunc_i2c_resume();
2251 }
2252
2253 static int pmu_sleep_valid(suspend_state_t state)
2254 {
2255         return state == PM_SUSPEND_MEM
2256                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2257 }
2258
2259 static struct platform_suspend_ops pmu_pm_ops = {
2260         .enter = powerbook_sleep,
2261         .valid = pmu_sleep_valid,
2262 };
2263
2264 static int register_pmu_pm_ops(void)
2265 {
2266         if (pmu_kind == PMU_OHARE_BASED)
2267                 powerbook_sleep_init_3400();
2268         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2269         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2270         suspend_set_ops(&pmu_pm_ops);
2271
2272         return 0;
2273 }
2274
2275 device_initcall(register_pmu_pm_ops);
2276 #endif
2277
2278 static int pmu_ioctl(struct file *filp,
2279                      u_int cmd, u_long arg)
2280 {
2281         __u32 __user *argp = (__u32 __user *)arg;
2282         int error = -EINVAL;
2283
2284         switch (cmd) {
2285         case PMU_IOC_SLEEP:
2286                 if (!capable(CAP_SYS_ADMIN))
2287                         return -EACCES;
2288                 return pm_suspend(PM_SUSPEND_MEM);
2289         case PMU_IOC_CAN_SLEEP:
2290                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2291                         return put_user(0, argp);
2292                 else
2293                         return put_user(1, argp);
2294
2295 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2296         /* Compatibility ioctl's for backlight */
2297         case PMU_IOC_GET_BACKLIGHT:
2298         {
2299                 int brightness;
2300
2301                 brightness = pmac_backlight_get_legacy_brightness();
2302                 if (brightness < 0)
2303                         return brightness;
2304                 else
2305                         return put_user(brightness, argp);
2306
2307         }
2308         case PMU_IOC_SET_BACKLIGHT:
2309         {
2310                 int brightness;
2311
2312                 error = get_user(brightness, argp);
2313                 if (error)
2314                         return error;
2315
2316                 return pmac_backlight_set_legacy_brightness(brightness);
2317         }
2318 #ifdef CONFIG_INPUT_ADBHID
2319         case PMU_IOC_GRAB_BACKLIGHT: {
2320                 struct pmu_private *pp = filp->private_data;
2321
2322                 if (pp->backlight_locker)
2323                         return 0;
2324
2325                 pp->backlight_locker = 1;
2326                 pmac_backlight_disable();
2327
2328                 return 0;
2329         }
2330 #endif /* CONFIG_INPUT_ADBHID */
2331 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2332
2333         case PMU_IOC_GET_MODEL:
2334                 return put_user(pmu_kind, argp);
2335         case PMU_IOC_HAS_ADB:
2336                 return put_user(pmu_has_adb, argp);
2337         }
2338         return error;
2339 }
2340
2341 static long pmu_unlocked_ioctl(struct file *filp,
2342                                u_int cmd, u_long arg)
2343 {
2344         int ret;
2345
2346         lock_kernel();
2347         ret = pmu_ioctl(filp, cmd, arg);
2348         unlock_kernel();
2349
2350         return ret;
2351 }
2352
2353 #ifdef CONFIG_COMPAT
2354 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2355 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2356 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2357 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2358 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2359 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2360
2361 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2362 {
2363         switch (cmd) {
2364         case PMU_IOC_SLEEP:
2365                 break;
2366         case PMU_IOC_GET_BACKLIGHT32:
2367                 cmd = PMU_IOC_GET_BACKLIGHT;
2368                 break;
2369         case PMU_IOC_SET_BACKLIGHT32:
2370                 cmd = PMU_IOC_SET_BACKLIGHT;
2371                 break;
2372         case PMU_IOC_GET_MODEL32:
2373                 cmd = PMU_IOC_GET_MODEL;
2374                 break;
2375         case PMU_IOC_HAS_ADB32:
2376                 cmd = PMU_IOC_HAS_ADB;
2377                 break;
2378         case PMU_IOC_CAN_SLEEP32:
2379                 cmd = PMU_IOC_CAN_SLEEP;
2380                 break;
2381         case PMU_IOC_GRAB_BACKLIGHT32:
2382                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2383                 break;
2384         default:
2385                 return -ENOIOCTLCMD;
2386         }
2387         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2388 }
2389 #endif
2390
2391 static const struct file_operations pmu_device_fops = {
2392         .read           = pmu_read,
2393         .write          = pmu_write,
2394         .poll           = pmu_fpoll,
2395         .unlocked_ioctl = pmu_unlocked_ioctl,
2396 #ifdef CONFIG_COMPAT
2397         .compat_ioctl   = compat_pmu_ioctl,
2398 #endif
2399         .open           = pmu_open,
2400         .release        = pmu_release,
2401 };
2402
2403 static struct miscdevice pmu_device = {
2404         PMU_MINOR, "pmu", &pmu_device_fops
2405 };
2406
2407 static int pmu_device_init(void)
2408 {
2409         if (!via)
2410                 return 0;
2411         if (misc_register(&pmu_device) < 0)
2412                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2413         return 0;
2414 }
2415 device_initcall(pmu_device_init);
2416
2417
2418 #ifdef DEBUG_SLEEP
2419 static inline void
2420 polled_handshake(volatile unsigned char __iomem *via)
2421 {
2422         via[B] &= ~TREQ; eieio();
2423         while ((via[B] & TACK) != 0)
2424                 ;
2425         via[B] |= TREQ; eieio();
2426         while ((via[B] & TACK) == 0)
2427                 ;
2428 }
2429
2430 static inline void
2431 polled_send_byte(volatile unsigned char __iomem *via, int x)
2432 {
2433         via[ACR] |= SR_OUT | SR_EXT; eieio();
2434         via[SR] = x; eieio();
2435         polled_handshake(via);
2436 }
2437
2438 static inline int
2439 polled_recv_byte(volatile unsigned char __iomem *via)
2440 {
2441         int x;
2442
2443         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2444         x = via[SR]; eieio();
2445         polled_handshake(via);
2446         x = via[SR]; eieio();
2447         return x;
2448 }
2449
2450 int
2451 pmu_polled_request(struct adb_request *req)
2452 {
2453         unsigned long flags;
2454         int i, l, c;
2455         volatile unsigned char __iomem *v = via;
2456
2457         req->complete = 1;
2458         c = req->data[0];
2459         l = pmu_data_len[c][0];
2460         if (l >= 0 && req->nbytes != l + 1)
2461                 return -EINVAL;
2462
2463         local_irq_save(flags);
2464         while (pmu_state != idle)
2465                 pmu_poll();
2466
2467         while ((via[B] & TACK) == 0)
2468                 ;
2469         polled_send_byte(v, c);
2470         if (l < 0) {
2471                 l = req->nbytes - 1;
2472                 polled_send_byte(v, l);
2473         }
2474         for (i = 1; i <= l; ++i)
2475                 polled_send_byte(v, req->data[i]);
2476
2477         l = pmu_data_len[c][1];
2478         if (l < 0)
2479                 l = polled_recv_byte(v);
2480         for (i = 0; i < l; ++i)
2481                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2482
2483         if (req->done)
2484                 (*req->done)(req);
2485
2486         local_irq_restore(flags);
2487         return 0;
2488 }
2489
2490 /* N.B. This doesn't work on the 3400 */
2491 void pmu_blink(int n)
2492 {
2493         struct adb_request req;
2494
2495         memset(&req, 0, sizeof(req));
2496
2497         for (; n > 0; --n) {
2498                 req.nbytes = 4;
2499                 req.done = NULL;
2500                 req.data[0] = 0xee;
2501                 req.data[1] = 4;
2502                 req.data[2] = 0;
2503                 req.data[3] = 1;
2504                 req.reply[0] = ADB_RET_OK;
2505                 req.reply_len = 1;
2506                 req.reply_expected = 0;
2507                 pmu_polled_request(&req);
2508                 mdelay(50);
2509                 req.nbytes = 4;
2510                 req.done = NULL;
2511                 req.data[0] = 0xee;
2512                 req.data[1] = 4;
2513                 req.data[2] = 0;
2514                 req.data[3] = 0;
2515                 req.reply[0] = ADB_RET_OK;
2516                 req.reply_len = 1;
2517                 req.reply_expected = 0;
2518                 pmu_polled_request(&req);
2519                 mdelay(50);
2520         }
2521         mdelay(50);
2522 }
2523 #endif /* DEBUG_SLEEP */
2524
2525 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2526 int pmu_sys_suspended;
2527
2528 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2529 {
2530         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2531                 return 0;
2532
2533         /* Suspend PMU event interrupts */\
2534         pmu_suspend();
2535         pmu_sys_suspended = 1;
2536
2537 #ifdef CONFIG_PMAC_BACKLIGHT
2538         /* Tell backlight code not to muck around with the chip anymore */
2539         pmu_backlight_set_sleep(1);
2540 #endif
2541
2542         return 0;
2543 }
2544
2545 static int pmu_sys_resume(struct sys_device *sysdev)
2546 {
2547         struct adb_request req;
2548
2549         if (!pmu_sys_suspended)
2550                 return 0;
2551
2552         /* Tell PMU we are ready */
2553         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2554         pmu_wait_complete(&req);
2555
2556 #ifdef CONFIG_PMAC_BACKLIGHT
2557         /* Tell backlight code it can use the chip again */
2558         pmu_backlight_set_sleep(0);
2559 #endif
2560         /* Resume PMU event interrupts */
2561         pmu_resume();
2562         pmu_sys_suspended = 0;
2563
2564         return 0;
2565 }
2566
2567 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2568
2569 static struct sysdev_class pmu_sysclass = {
2570         .name = "pmu",
2571 };
2572
2573 static struct sys_device device_pmu = {
2574         .cls            = &pmu_sysclass,
2575 };
2576
2577 static struct sysdev_driver driver_pmu = {
2578 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2579         .suspend        = &pmu_sys_suspend,
2580         .resume         = &pmu_sys_resume,
2581 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2582 };
2583
2584 static int __init init_pmu_sysfs(void)
2585 {
2586         int rc;
2587
2588         rc = sysdev_class_register(&pmu_sysclass);
2589         if (rc) {
2590                 printk(KERN_ERR "Failed registering PMU sys class\n");
2591                 return -ENODEV;
2592         }
2593         rc = sysdev_register(&device_pmu);
2594         if (rc) {
2595                 printk(KERN_ERR "Failed registering PMU sys device\n");
2596                 return -ENODEV;
2597         }
2598         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2599         if (rc) {
2600                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2601                 return -ENODEV;
2602         }
2603         return 0;
2604 }
2605
2606 subsys_initcall(init_pmu_sysfs);
2607
2608 EXPORT_SYMBOL(pmu_request);
2609 EXPORT_SYMBOL(pmu_queue_request);
2610 EXPORT_SYMBOL(pmu_poll);
2611 EXPORT_SYMBOL(pmu_poll_adb);
2612 EXPORT_SYMBOL(pmu_wait_complete);
2613 EXPORT_SYMBOL(pmu_suspend);
2614 EXPORT_SYMBOL(pmu_resume);
2615 EXPORT_SYMBOL(pmu_unlock);
2616 #if defined(CONFIG_PPC32)
2617 EXPORT_SYMBOL(pmu_enable_irled);
2618 EXPORT_SYMBOL(pmu_battery_count);
2619 EXPORT_SYMBOL(pmu_batteries);
2620 EXPORT_SYMBOL(pmu_power_flags);
2621 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2622