SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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 <asm/prom.h>
  49 #include <asm/machdep.h>
  50 #include <asm/io.h>
  51 #include <asm/pgtable.h>
  52 #include <asm/system.h>
  53 #include <asm/sections.h>
  54 #include <asm/irq.h>
  55 #include <asm/pmac_feature.h>
  56 #include <asm/pmac_pfunc.h>
  57 #include <asm/pmac_low_i2c.h>
  58 #include <asm/uaccess.h>
  59 #include <asm/mmu_context.h>
  60 #include <asm/cputable.h>
  61 #include <asm/time.h>
  62 #include <asm/backlight.h>
  63
  64 #include "via-pmu-event.h"
  65
  66 /* Some compile options */
  67 #undef DEBUG_SLEEP
  68
  69 /* Misc minor number allocated for /dev/pmu */
  70 #define PMU_MINOR               154
  71
  72 /* How many iterations between battery polls */
  73 #define BATTERY_POLLING_COUNT   2
  74
  75 static volatile unsigned char __iomem *via;
  76
  77 /* VIA registers - spaced 0x200 bytes apart */
  78 #define RS              0x200           /* skip between registers */
  79 #define B               0               /* B-side data */
  80 #define A               RS              /* A-side data */
  81 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  82 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  83 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  84 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  85 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  86 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  87 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  88 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  89 #define SR              (10*RS)         /* Shift register */
  90 #define ACR             (11*RS)         /* Auxiliary control register */
  91 #define PCR             (12*RS)         /* Peripheral control register */
  92 #define IFR             (13*RS)         /* Interrupt flag register */
  93 #define IER             (14*RS)         /* Interrupt enable register */
  94 #define ANH             (15*RS)         /* A-side data, no handshake */
  95
  96 /* Bits in B data register: both active low */
  97 #define TACK            0x08            /* Transfer acknowledge (input) */
  98 #define TREQ            0x10            /* Transfer request (output) */
  99
 100 /* Bits in ACR */
 101 #define SR_CTRL         0x1c            /* Shift register control bits */
 102 #define SR_EXT          0x0c            /* Shift on external clock */
 103 #define SR_OUT          0x10            /* Shift out if 1 */
 104
 105 /* Bits in IFR and IER */
 106 #define IER_SET         0x80            /* set bits in IER */
 107 #define IER_CLR         0               /* clear bits in IER */
 108 #define SR_INT          0x04            /* Shift register full/empty */
 109 #define CB2_INT         0x08
 110 #define CB1_INT         0x10            /* transition on CB1 input */
 111
 112 static volatile enum pmu_state {
 113         idle,
 114         sending,
 115         intack,
 116         reading,
 117         reading_intr,
 118         locked,
 119 } pmu_state;
 120
 121 static volatile enum int_data_state {
 122         int_data_empty,
 123         int_data_fill,
 124         int_data_ready,
 125         int_data_flush
 126 } int_data_state[2] = { int_data_empty, int_data_empty };
 127
 128 static struct adb_request *current_req;
 129 static struct adb_request *last_req;
 130 static struct adb_request *req_awaiting_reply;
 131 static unsigned char interrupt_data[2][32];
 132 static int interrupt_data_len[2];
 133 static int int_data_last;
 134 static unsigned char *reply_ptr;
 135 static int data_index;
 136 static int data_len;
 137 static volatile int adb_int_pending;
 138 static volatile int disable_poll;
 139 static struct device_node *vias;
 140 static int pmu_kind = PMU_UNKNOWN;
 141 static int pmu_fully_inited;
 142 static int pmu_has_adb;
 143 static struct device_node *gpio_node;
 144 static unsigned char __iomem *gpio_reg;
 145 static int gpio_irq = NO_IRQ;
 146 static int gpio_irq_enabled = -1;
 147 static volatile int pmu_suspended;
 148 static spinlock_t pmu_lock;
 149 static u8 pmu_intr_mask;
 150 static int pmu_version;
 151 static int drop_interrupts;
 152 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 153 static int option_lid_wakeup = 1;
 154 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 155 static unsigned long async_req_locks;
 156 static unsigned int pmu_irq_stats[11];
 157
 158 static struct proc_dir_entry *proc_pmu_root;
 159 static struct proc_dir_entry *proc_pmu_info;
 160 static struct proc_dir_entry *proc_pmu_irqstats;
 161 static struct proc_dir_entry *proc_pmu_options;
 162 static int option_server_mode;
 163
 164 int pmu_battery_count;
 165 int pmu_cur_battery;
 166 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 167 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 168 static int query_batt_timer = BATTERY_POLLING_COUNT;
 169 static struct adb_request batt_req;
 170 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 171
 172 int __fake_sleep;
 173 int asleep;
 174
 175 #ifdef CONFIG_ADB
 176 static int adb_dev_map;
 177 static int pmu_adb_flags;
 178
 179 static int pmu_probe(void);
 180 static int pmu_init(void);
 181 static int pmu_send_request(struct adb_request *req, int sync);
 182 static int pmu_adb_autopoll(int devs);
 183 static int pmu_adb_reset_bus(void);
 184 #endif /* CONFIG_ADB */
 185
 186 static int init_pmu(void);
 187 static void pmu_start(void);
 188 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 189 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 190 static const struct file_operations pmu_info_proc_fops;
 191 static const struct file_operations pmu_irqstats_proc_fops;
 192 static void pmu_pass_intr(unsigned char *data, int len);
 193 static const struct file_operations pmu_battery_proc_fops;
 194 static const struct file_operations pmu_options_proc_fops;
 195
 196 #ifdef CONFIG_ADB
 197 struct adb_driver via_pmu_driver = {
 198         "PMU",
 199         pmu_probe,
 200         pmu_init,
 201         pmu_send_request,
 202         pmu_adb_autopoll,
 203         pmu_poll_adb,
 204         pmu_adb_reset_bus
 205 };
 206 #endif /* CONFIG_ADB */
 207
 208 extern void low_sleep_handler(void);
 209 extern void enable_kernel_altivec(void);
 210 extern void enable_kernel_fp(void);
 211
 212 #ifdef DEBUG_SLEEP
 213 int pmu_polled_request(struct adb_request *req);
 214 void pmu_blink(int n);
 215 #endif
 216
 217 /*
 218  * This table indicates for each PMU opcode:
 219  * - the number of data bytes to be sent with the command, or -1
 220  *   if a length byte should be sent,
 221  * - the number of response bytes which the PMU will return, or
 222  *   -1 if it will send a length byte.
 223  */
 224 static const s8 pmu_data_len[256][2] = {
 225 /*         0       1       2       3       4       5       6       7  */
 226 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 227 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 228 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 229 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 230 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 231 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 232 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 233 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 234 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 235 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 236 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 237 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 238 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 239 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 240 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 241 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 242 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 243 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 244 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 245 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 246 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 247 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 248 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 250 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 252 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 254 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 255 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 256 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 258 };
 259
 260 static char *pbook_type[] = {
 261         "Unknown PowerBook",
 262         "PowerBook 2400/3400/3500(G3)",
 263         "PowerBook G3 Series",
 264         "1999 PowerBook G3",
 265         "Core99"
 266 };
 267
 268 int __init find_via_pmu(void)
 269 {
 270         u64 taddr;
 271         const u32 *reg;
 272
 273         if (via != 0)
 274                 return 1;
 275         vias = of_find_node_by_name(NULL, "via-pmu");
 276         if (vias == NULL)
 277                 return 0;
 278
 279         reg = of_get_property(vias, "reg", NULL);
 280         if (reg == NULL) {
 281                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 282                 goto fail;
 283         }
 284         taddr = of_translate_address(vias, reg);
 285         if (taddr == OF_BAD_ADDR) {
 286                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 287                 goto fail;
 288         }
 289
 290         spin_lock_init(&pmu_lock);
 291
 292         pmu_has_adb = 1;
 293
 294         pmu_intr_mask = PMU_INT_PCEJECT |
 295                         PMU_INT_SNDBRT |
 296                         PMU_INT_ADB |
 297                         PMU_INT_TICK;
 298
 299         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 300             || of_device_is_compatible(vias->parent, "ohare")))
 301                 pmu_kind = PMU_OHARE_BASED;
 302         else if (of_device_is_compatible(vias->parent, "paddington"))
 303                 pmu_kind = PMU_PADDINGTON_BASED;
 304         else if (of_device_is_compatible(vias->parent, "heathrow"))
 305                 pmu_kind = PMU_HEATHROW_BASED;
 306         else if (of_device_is_compatible(vias->parent, "Keylargo")
 307                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 308                 struct device_node *gpiop;
 309                 struct device_node *adbp;
 310                 u64 gaddr = OF_BAD_ADDR;
 311
 312                 pmu_kind = PMU_KEYLARGO_BASED;
 313                 adbp = of_find_node_by_type(NULL, "adb");
 314                 pmu_has_adb = (adbp != NULL);
 315                 of_node_put(adbp);
 316                 pmu_intr_mask = PMU_INT_PCEJECT |
 317                                 PMU_INT_SNDBRT |
 318                                 PMU_INT_ADB |
 319                                 PMU_INT_TICK |
 320                                 PMU_INT_ENVIRONMENT;
 321
 322                 gpiop = of_find_node_by_name(NULL, "gpio");
 323                 if (gpiop) {
 324                         reg = of_get_property(gpiop, "reg", NULL);
 325                         if (reg)
 326                                 gaddr = of_translate_address(gpiop, reg);
 327                         if (gaddr != OF_BAD_ADDR)
 328                                 gpio_reg = ioremap(gaddr, 0x10);
 329                 }
 330                 if (gpio_reg == NULL) {
 331                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 332                         goto fail_gpio;
 333                 }
 334         } else
 335                 pmu_kind = PMU_UNKNOWN;
 336
 337         via = ioremap(taddr, 0x2000);
 338         if (via == NULL) {
 339                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 340                 goto fail;
 341         }
 342
 343         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 344         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 345
 346         pmu_state = idle;
 347
 348         if (!init_pmu()) {
 349                 via = NULL;
 350                 return 0;
 351         }
 352
 353         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 354                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 355
 356         sys_ctrler = SYS_CTRLER_PMU;
 357
 358         return 1;
 359  fail:
 360         of_node_put(vias);
 361         iounmap(gpio_reg);
 362         gpio_reg = NULL;
 363  fail_gpio:
 364         vias = NULL;
 365         return 0;
 366 }
 367
 368 #ifdef CONFIG_ADB
 369 static int pmu_probe(void)
 370 {
 371         return vias == NULL? -ENODEV: 0;
 372 }
 373
 374 static int __init pmu_init(void)
 375 {
 376         if (vias == NULL)
 377                 return -ENODEV;
 378         return 0;
 379 }
 380 #endif /* CONFIG_ADB */
 381
 382 /*
 383  * We can't wait until pmu_init gets called, that happens too late.
 384  * It happens after IDE and SCSI initialization, which can take a few
 385  * seconds, and by that time the PMU could have given up on us and
 386  * turned us off.
 387  * Thus this is called with arch_initcall rather than device_initcall.
 388  */
 389 static int __init via_pmu_start(void)
 390 {
 391         unsigned int irq;
 392
 393         if (vias == NULL)
 394                 return -ENODEV;
 395
 396         batt_req.complete = 1;
 397
 398         irq = irq_of_parse_and_map(vias, 0);
 399         if (irq == NO_IRQ) {
 400                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 401                 return -ENODEV;
 402         }
 403         /* We set IRQF_TIMER because we don't want the interrupt to be disabled
 404          * between the 2 passes of driver suspend, we control our own disabling
 405          * for that one
 406          */
 407         if (request_irq(irq, via_pmu_interrupt, IRQF_TIMER, "VIA-PMU", (void *)0)) {
 408                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 409                 return -ENODEV;
 410         }
 411
 412         if (pmu_kind == PMU_KEYLARGO_BASED) {
 413                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 414                 if (gpio_node == NULL)
 415                         gpio_node = of_find_node_by_name(NULL,
 416                                                          "pmu-interrupt");
 417                 if (gpio_node)
 418                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 419
 420                 if (gpio_irq != NO_IRQ) {
 421                         if (request_irq(gpio_irq, gpio1_interrupt, IRQF_TIMER,
 422                                         "GPIO1 ADB", (void *)0))
 423                                 printk(KERN_ERR "pmu: can't get irq %d"
 424                                        " (GPIO1)\n", gpio_irq);
 425                         else
 426                                 gpio_irq_enabled = 1;
 427                 }
 428         }
 429
 430         /* Enable interrupts */
 431         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 432
 433         pmu_fully_inited = 1;
 434
 435         /* Make sure PMU settle down before continuing. This is _very_ important
 436          * since the IDE probe may shut interrupts down for quite a bit of time. If
 437          * a PMU communication is pending while this happens, the PMU may timeout
 438          * Not that on Core99 machines, the PMU keeps sending us environement
 439          * messages, we should find a way to either fix IDE or make it call
 440          * pmu_suspend() before masking interrupts. This can also happens while
 441          * scolling with some fbdevs.
 442          */
 443         do {
 444                 pmu_poll();
 445         } while (pmu_state != idle);
 446
 447         return 0;
 448 }
 449
 450 arch_initcall(via_pmu_start);
 451
 452 /*
 453  * This has to be done after pci_init, which is a subsys_initcall.
 454  */
 455 static int __init via_pmu_dev_init(void)
 456 {
 457         if (vias == NULL)
 458                 return -ENODEV;
 459
 460 #ifdef CONFIG_PMAC_BACKLIGHT
 461         /* Initialize backlight */
 462         pmu_backlight_init();
 463 #endif
 464
 465 #ifdef CONFIG_PPC32
 466         if (of_machine_is_compatible("AAPL,3400/2400") ||
 467                 of_machine_is_compatible("AAPL,3500")) {
 468                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 469                         NULL, PMAC_MB_INFO_MODEL, 0);
 470                 pmu_battery_count = 1;
 471                 if (mb == PMAC_TYPE_COMET)
 472                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 473                 else
 474                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 475         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 476                 of_machine_is_compatible("PowerBook1,1")) {
 477                 pmu_battery_count = 2;
 478                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 479                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 480         } else {
 481                 struct device_node* prim =
 482                         of_find_node_by_name(NULL, "power-mgt");
 483                 const u32 *prim_info = NULL;
 484                 if (prim)
 485                         prim_info = of_get_property(prim, "prim-info", NULL);
 486                 if (prim_info) {
 487                         /* Other stuffs here yet unknown */
 488                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 489                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 490                         if (pmu_battery_count > 1)
 491                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 492                 }
 493                 of_node_put(prim);
 494         }
 495 #endif /* CONFIG_PPC32 */
 496
 497         /* Create /proc/pmu */
 498         proc_pmu_root = proc_mkdir("pmu", NULL);
 499         if (proc_pmu_root) {
 500                 long i;
 501
 502                 for (i=0; i<pmu_battery_count; i++) {
 503                         char title[16];
 504                         sprintf(title, "battery_%ld", i);
 505                         proc_pmu_batt[i] = proc_create_data(title, 0, proc_pmu_root,
 506                                         &pmu_battery_proc_fops, (void *)i);
 507                 }
 508
 509                 proc_pmu_info = proc_create("info", 0, proc_pmu_root, &pmu_info_proc_fops);
 510                 proc_pmu_irqstats = proc_create("interrupts", 0, proc_pmu_root,
 511                                                 &pmu_irqstats_proc_fops);
 512                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 513                                                 &pmu_options_proc_fops);
 514         }
 515         return 0;
 516 }
 517
 518 device_initcall(via_pmu_dev_init);
 519
 520 static int
 521 init_pmu(void)
 522 {
 523         int timeout;
 524         struct adb_request req;
 525
 526         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 527         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 528
 529         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 530         timeout =  100000;
 531         while (!req.complete) {
 532                 if (--timeout < 0) {
 533                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 534                         return 0;
 535                 }
 536                 udelay(10);
 537                 pmu_poll();
 538         }
 539
 540         /* ack all pending interrupts */
 541         timeout = 100000;
 542         interrupt_data[0][0] = 1;
 543         while (interrupt_data[0][0] || pmu_state != idle) {
 544                 if (--timeout < 0) {
 545                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 546                         return 0;
 547                 }
 548                 if (pmu_state == idle)
 549                         adb_int_pending = 1;
 550                 via_pmu_interrupt(0, NULL);
 551                 udelay(10);
 552         }
 553
 554         /* Tell PMU we are ready.  */
 555         if (pmu_kind == PMU_KEYLARGO_BASED) {
 556                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 557                 while (!req.complete)
 558                         pmu_poll();
 559         }
 560
 561         /* Read PMU version */
 562         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 563         pmu_wait_complete(&req);
 564         if (req.reply_len > 0)
 565                 pmu_version = req.reply[0];
 566
 567         /* Read server mode setting */
 568         if (pmu_kind == PMU_KEYLARGO_BASED) {
 569                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 570                             PMU_PWR_GET_POWERUP_EVENTS);
 571                 pmu_wait_complete(&req);
 572                 if (req.reply_len == 2) {
 573                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 574                                 option_server_mode = 1;
 575                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 576                                option_server_mode ? "enabled" : "disabled");
 577                 }
 578         }
 579         return 1;
 580 }
 581
 582 int
 583 pmu_get_model(void)
 584 {
 585         return pmu_kind;
 586 }
 587
 588 static void pmu_set_server_mode(int server_mode)
 589 {
 590         struct adb_request req;
 591
 592         if (pmu_kind != PMU_KEYLARGO_BASED)
 593                 return;
 594
 595         option_server_mode = server_mode;
 596         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 597         pmu_wait_complete(&req);
 598         if (req.reply_len < 2)
 599                 return;
 600         if (server_mode)
 601                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 602                             PMU_PWR_SET_POWERUP_EVENTS,
 603                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 604         else
 605                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 606                             PMU_PWR_CLR_POWERUP_EVENTS,
 607                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 608         pmu_wait_complete(&req);
 609 }
 610
 611 /* This new version of the code for 2400/3400/3500 powerbooks
 612  * is inspired from the implementation in gkrellm-pmu
 613  */
 614 static void
 615 done_battery_state_ohare(struct adb_request* req)
 616 {
 617         /* format:
 618          *  [0]    :  flags
 619          *    0x01 :  AC indicator
 620          *    0x02 :  charging
 621          *    0x04 :  battery exist
 622          *    0x08 :
 623          *    0x10 :
 624          *    0x20 :  full charged
 625          *    0x40 :  pcharge reset
 626          *    0x80 :  battery exist
 627          *
 628          *  [1][2] :  battery voltage
 629          *  [3]    :  CPU temperature
 630          *  [4]    :  battery temperature
 631          *  [5]    :  current
 632          *  [6][7] :  pcharge
 633          *              --tkoba
 634          */
 635         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 636         long pcharge, charge, vb, vmax, lmax;
 637         long vmax_charging, vmax_charged;
 638         long amperage, voltage, time, max;
 639         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 640                         NULL, PMAC_MB_INFO_MODEL, 0);
 641
 642         if (req->reply[0] & 0x01)
 643                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 644         else
 645                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 646
 647         if (mb == PMAC_TYPE_COMET) {
 648                 vmax_charged = 189;
 649                 vmax_charging = 213;
 650                 lmax = 6500;
 651         } else {
 652                 vmax_charged = 330;
 653                 vmax_charging = 330;
 654                 lmax = 6500;
 655         }
 656         vmax = vmax_charged;
 657
 658         /* If battery installed */
 659         if (req->reply[0] & 0x04) {
 660                 bat_flags |= PMU_BATT_PRESENT;
 661                 if (req->reply[0] & 0x02)
 662                         bat_flags |= PMU_BATT_CHARGING;
 663                 vb = (req->reply[1] << 8) | req->reply[2];
 664                 voltage = (vb * 265 + 72665) / 10;
 665                 amperage = req->reply[5];
 666                 if ((req->reply[0] & 0x01) == 0) {
 667                         if (amperage > 200)
 668                                 vb += ((amperage - 200) * 15)/100;
 669                 } else if (req->reply[0] & 0x02) {
 670                         vb = (vb * 97) / 100;
 671                         vmax = vmax_charging;
 672                 }
 673                 charge = (100 * vb) / vmax;
 674                 if (req->reply[0] & 0x40) {
 675                         pcharge = (req->reply[6] << 8) + req->reply[7];
 676                         if (pcharge > lmax)
 677                                 pcharge = lmax;
 678                         pcharge *= 100;
 679                         pcharge = 100 - pcharge / lmax;
 680                         if (pcharge < charge)
 681                                 charge = pcharge;
 682                 }
 683                 if (amperage > 0)
 684                         time = (charge * 16440) / amperage;
 685                 else
 686                         time = 0;
 687                 max = 100;
 688                 amperage = -amperage;
 689         } else
 690                 charge = max = amperage = voltage = time = 0;
 691
 692         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 693         pmu_batteries[pmu_cur_battery].charge = charge;
 694         pmu_batteries[pmu_cur_battery].max_charge = max;
 695         pmu_batteries[pmu_cur_battery].amperage = amperage;
 696         pmu_batteries[pmu_cur_battery].voltage = voltage;
 697         pmu_batteries[pmu_cur_battery].time_remaining = time;
 698
 699         clear_bit(0, &async_req_locks);
 700 }
 701
 702 static void
 703 done_battery_state_smart(struct adb_request* req)
 704 {
 705         /* format:
 706          *  [0] : format of this structure (known: 3,4,5)
 707          *  [1] : flags
 708          *
 709          *  format 3 & 4:
 710          *
 711          *  [2] : charge
 712          *  [3] : max charge
 713          *  [4] : current
 714          *  [5] : voltage
 715          *
 716          *  format 5:
 717          *
 718          *  [2][3] : charge
 719          *  [4][5] : max charge
 720          *  [6][7] : current
 721          *  [8][9] : voltage
 722          */
 723
 724         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 725         int amperage;
 726         unsigned int capa, max, voltage;
 727
 728         if (req->reply[1] & 0x01)
 729                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 730         else
 731                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 732
 733
 734         capa = max = amperage = voltage = 0;
 735
 736         if (req->reply[1] & 0x04) {
 737                 bat_flags |= PMU_BATT_PRESENT;
 738                 switch(req->reply[0]) {
 739                         case 3:
 740                         case 4: capa = req->reply[2];
 741                                 max = req->reply[3];
 742                                 amperage = *((signed char *)&req->reply[4]);
 743                                 voltage = req->reply[5];
 744                                 break;
 745                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 746                                 max = (req->reply[4] << 8) | req->reply[5];
 747                                 amperage = *((signed short *)&req->reply[6]);
 748                                 voltage = (req->reply[8] << 8) | req->reply[9];
 749                                 break;
 750                         default:
 751                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 752                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 753                                 break;
 754                 }
 755         }
 756
 757         if ((req->reply[1] & 0x01) && (amperage > 0))
 758                 bat_flags |= PMU_BATT_CHARGING;
 759
 760         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 761         pmu_batteries[pmu_cur_battery].charge = capa;
 762         pmu_batteries[pmu_cur_battery].max_charge = max;
 763         pmu_batteries[pmu_cur_battery].amperage = amperage;
 764         pmu_batteries[pmu_cur_battery].voltage = voltage;
 765         if (amperage) {
 766                 if ((req->reply[1] & 0x01) && (amperage > 0))
 767                         pmu_batteries[pmu_cur_battery].time_remaining
 768                                 = ((max-capa) * 3600) / amperage;
 769                 else
 770                         pmu_batteries[pmu_cur_battery].time_remaining
 771                                 = (capa * 3600) / (-amperage);
 772         } else
 773                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 774
 775         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 776
 777         clear_bit(0, &async_req_locks);
 778 }
 779
 780 static void
 781 query_battery_state(void)
 782 {
 783         if (test_and_set_bit(0, &async_req_locks))
 784                 return;
 785         if (pmu_kind == PMU_OHARE_BASED)
 786                 pmu_request(&batt_req, done_battery_state_ohare,
 787                         1, PMU_BATTERY_STATE);
 788         else
 789                 pmu_request(&batt_req, done_battery_state_smart,
 790                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 791 }
 792
 793 static int pmu_info_proc_show(struct seq_file *m, void *v)
 794 {
 795         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 796         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 797         seq_printf(m, "AC Power               : %d\n",
 798                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 799         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 800
 801         return 0;
 802 }
 803
 804 static int pmu_info_proc_open(struct inode *inode, struct file *file)
 805 {
 806         return single_open(file, pmu_info_proc_show, NULL);
 807 }
 808
 809 static const struct file_operations pmu_info_proc_fops = {
 810         .owner          = THIS_MODULE,
 811         .open           = pmu_info_proc_open,
 812         .read           = seq_read,
 813         .llseek         = seq_lseek,
 814         .release        = single_release,
 815 };
 816
 817 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 818 {
 819         int i;
 820         static const char *irq_names[] = {
 821                 "Total CB1 triggered events",
 822                 "Total GPIO1 triggered events",
 823                 "PC-Card eject button",
 824                 "Sound/Brightness button",
 825                 "ADB message",
 826                 "Battery state change",
 827                 "Environment interrupt",
 828                 "Tick timer",
 829                 "Ghost interrupt (zero len)",
 830                 "Empty interrupt (empty mask)",
 831                 "Max irqs in a row"
 832         };
 833
 834         for (i=0; i<11; i++) {
 835                 seq_printf(m, " %2u: %10u (%s)\n",
 836                              i, pmu_irq_stats[i], irq_names[i]);
 837         }
 838         return 0;
 839 }
 840
 841 static int pmu_irqstats_proc_open(struct inode *inode, struct file *file)
 842 {
 843         return single_open(file, pmu_irqstats_proc_show, NULL);
 844 }
 845
 846 static const struct file_operations pmu_irqstats_proc_fops = {
 847         .owner          = THIS_MODULE,
 848         .open           = pmu_irqstats_proc_open,
 849         .read           = seq_read,
 850         .llseek         = seq_lseek,
 851         .release        = single_release,
 852 };
 853
 854 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 855 {
 856         long batnum = (long)m->private;
 857
 858         seq_putc(m, '\n');
 859         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 860         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 861         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 862         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 863         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 864         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 865         return 0;
 866 }
 867
 868 static int pmu_battery_proc_open(struct inode *inode, struct file *file)
 869 {
 870         return single_open(file, pmu_battery_proc_show, PDE(inode)->data);
 871 }
 872
 873 static const struct file_operations pmu_battery_proc_fops = {
 874         .owner          = THIS_MODULE,
 875         .open           = pmu_battery_proc_open,
 876         .read           = seq_read,
 877         .llseek         = seq_lseek,
 878         .release        = single_release,
 879 };
 880
 881 static int pmu_options_proc_show(struct seq_file *m, void *v)
 882 {
 883 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 884         if (pmu_kind == PMU_KEYLARGO_BASED &&
 885             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 886                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 887 #endif
 888         if (pmu_kind == PMU_KEYLARGO_BASED)
 889                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 890
 891         return 0;
 892 }
 893
 894 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 895 {
 896         return single_open(file, pmu_options_proc_show, NULL);
 897 }
 898
 899 static ssize_t pmu_options_proc_write(struct file *file,
 900                 const char __user *buffer, size_t count, loff_t *pos)
 901 {
 902         char tmp[33];
 903         char *label, *val;
 904         size_t fcount = count;
 905
 906         if (!count)
 907                 return -EINVAL;
 908         if (count > 32)
 909                 count = 32;
 910         if (copy_from_user(tmp, buffer, count))
 911                 return -EFAULT;
 912         tmp[count] = 0;
 913
 914         label = tmp;
 915         while(*label == ' ')
 916                 label++;
 917         val = label;
 918         while(*val && (*val != '=')) {
 919                 if (*val == ' ')
 920                         *val = 0;
 921                 val++;
 922         }
 923         if ((*val) == 0)
 924                 return -EINVAL;
 925         *(val++) = 0;
 926         while(*val == ' ')
 927                 val++;
 928 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 929         if (pmu_kind == PMU_KEYLARGO_BASED &&
 930             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 931                 if (!strcmp(label, "lid_wakeup"))
 932                         option_lid_wakeup = ((*val) == '1');
 933 #endif
 934         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 935                 int new_value;
 936                 new_value = ((*val) == '1');
 937                 if (new_value != option_server_mode)
 938                         pmu_set_server_mode(new_value);
 939         }
 940         return fcount;
 941 }
 942
 943 static const struct file_operations pmu_options_proc_fops = {
 944         .owner          = THIS_MODULE,
 945         .open           = pmu_options_proc_open,
 946         .read           = seq_read,
 947         .llseek         = seq_lseek,
 948         .release        = single_release,
 949         .write          = pmu_options_proc_write,
 950 };
 951
 952 #ifdef CONFIG_ADB
 953 /* Send an ADB command */
 954 static int pmu_send_request(struct adb_request *req, int sync)
 955 {
 956         int i, ret;
 957
 958         if ((vias == NULL) || (!pmu_fully_inited)) {
 959                 req->complete = 1;
 960                 return -ENXIO;
 961         }
 962
 963         ret = -EINVAL;
 964
 965         switch (req->data[0]) {
 966         case PMU_PACKET:
 967                 for (i = 0; i < req->nbytes - 1; ++i)
 968                         req->data[i] = req->data[i+1];
 969                 --req->nbytes;
 970                 if (pmu_data_len[req->data[0]][1] != 0) {
 971                         req->reply[0] = ADB_RET_OK;
 972                         req->reply_len = 1;
 973                 } else
 974                         req->reply_len = 0;
 975                 ret = pmu_queue_request(req);
 976                 break;
 977         case CUDA_PACKET:
 978                 switch (req->data[1]) {
 979                 case CUDA_GET_TIME:
 980                         if (req->nbytes != 2)
 981                                 break;
 982                         req->data[0] = PMU_READ_RTC;
 983                         req->nbytes = 1;
 984                         req->reply_len = 3;
 985                         req->reply[0] = CUDA_PACKET;
 986                         req->reply[1] = 0;
 987                         req->reply[2] = CUDA_GET_TIME;
 988                         ret = pmu_queue_request(req);
 989                         break;
 990                 case CUDA_SET_TIME:
 991                         if (req->nbytes != 6)
 992                                 break;
 993                         req->data[0] = PMU_SET_RTC;
 994                         req->nbytes = 5;
 995                         for (i = 1; i <= 4; ++i)
 996                                 req->data[i] = req->data[i+1];
 997                         req->reply_len = 3;
 998                         req->reply[0] = CUDA_PACKET;
 999                         req->reply[1] = 0;
1000                         req->reply[2] = CUDA_SET_TIME;
1001                         ret = pmu_queue_request(req);
1002                         break;
1003                 }
1004                 break;
1005         case ADB_PACKET:
1006                 if (!pmu_has_adb)
1007                         return -ENXIO;
1008                 for (i = req->nbytes - 1; i > 1; --i)
1009                         req->data[i+2] = req->data[i];
1010                 req->data[3] = req->nbytes - 2;
1011                 req->data[2] = pmu_adb_flags;
1012                 /*req->data[1] = req->data[1];*/
1013                 req->data[0] = PMU_ADB_CMD;
1014                 req->nbytes += 2;
1015                 req->reply_expected = 1;
1016                 req->reply_len = 0;
1017                 ret = pmu_queue_request(req);
1018                 break;
1019         }
1020         if (ret) {
1021                 req->complete = 1;
1022                 return ret;
1023         }
1024
1025         if (sync)
1026                 while (!req->complete)
1027                         pmu_poll();
1028
1029         return 0;
1030 }
1031
1032 /* Enable/disable autopolling */
1033 static int __pmu_adb_autopoll(int devs)
1034 {
1035         struct adb_request req;
1036
1037         if (devs) {
1038                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1039                             adb_dev_map >> 8, adb_dev_map);
1040                 pmu_adb_flags = 2;
1041         } else {
1042                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1043                 pmu_adb_flags = 0;
1044         }
1045         while (!req.complete)
1046                 pmu_poll();
1047         return 0;
1048 }
1049
1050 static int pmu_adb_autopoll(int devs)
1051 {
1052         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1053                 return -ENXIO;
1054
1055         adb_dev_map = devs;
1056         return __pmu_adb_autopoll(devs);
1057 }
1058
1059 /* Reset the ADB bus */
1060 static int pmu_adb_reset_bus(void)
1061 {
1062         struct adb_request req;
1063         int save_autopoll = adb_dev_map;
1064
1065         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1066                 return -ENXIO;
1067
1068         /* anyone got a better idea?? */
1069         __pmu_adb_autopoll(0);
1070
1071         req.nbytes = 4;
1072         req.done = NULL;
1073         req.data[0] = PMU_ADB_CMD;
1074         req.data[1] = ADB_BUSRESET;
1075         req.data[2] = 0;
1076         req.data[3] = 0;
1077         req.data[4] = 0;
1078         req.reply_len = 0;
1079         req.reply_expected = 1;
1080         if (pmu_queue_request(&req) != 0) {
1081                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1082                 return -EIO;
1083         }
1084         pmu_wait_complete(&req);
1085
1086         if (save_autopoll != 0)
1087                 __pmu_adb_autopoll(save_autopoll);
1088
1089         return 0;
1090 }
1091 #endif /* CONFIG_ADB */
1092
1093 /* Construct and send a pmu request */
1094 int
1095 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1096             int nbytes, ...)
1097 {
1098         va_list list;
1099         int i;
1100
1101         if (vias == NULL)
1102                 return -ENXIO;
1103
1104         if (nbytes < 0 || nbytes > 32) {
1105                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1106                 req->complete = 1;
1107                 return -EINVAL;
1108         }
1109         req->nbytes = nbytes;
1110         req->done = done;
1111         va_start(list, nbytes);
1112         for (i = 0; i < nbytes; ++i)
1113                 req->data[i] = va_arg(list, int);
1114         va_end(list);
1115         req->reply_len = 0;
1116         req->reply_expected = 0;
1117         return pmu_queue_request(req);
1118 }
1119
1120 int
1121 pmu_queue_request(struct adb_request *req)
1122 {
1123         unsigned long flags;
1124         int nsend;
1125
1126         if (via == NULL) {
1127                 req->complete = 1;
1128                 return -ENXIO;
1129         }
1130         if (req->nbytes <= 0) {
1131                 req->complete = 1;
1132                 return 0;
1133         }
1134         nsend = pmu_data_len[req->data[0]][0];
1135         if (nsend >= 0 && req->nbytes != nsend + 1) {
1136                 req->complete = 1;
1137                 return -EINVAL;
1138         }
1139
1140         req->next = NULL;
1141         req->sent = 0;
1142         req->complete = 0;
1143
1144         spin_lock_irqsave(&pmu_lock, flags);
1145         if (current_req != 0) {
1146                 last_req->next = req;
1147                 last_req = req;
1148         } else {
1149                 current_req = req;
1150                 last_req = req;
1151                 if (pmu_state == idle)
1152                         pmu_start();
1153         }
1154         spin_unlock_irqrestore(&pmu_lock, flags);
1155
1156         return 0;
1157 }
1158
1159 static inline void
1160 wait_for_ack(void)
1161 {
1162         /* Sightly increased the delay, I had one occurrence of the message
1163          * reported
1164          */
1165         int timeout = 4000;
1166         while ((in_8(&via[B]) & TACK) == 0) {
1167                 if (--timeout < 0) {
1168                         printk(KERN_ERR "PMU not responding (!ack)\n");
1169                         return;
1170                 }
1171                 udelay(10);
1172         }
1173 }
1174
1175 /* New PMU seems to be very sensitive to those timings, so we make sure
1176  * PCI is flushed immediately */
1177 static inline void
1178 send_byte(int x)
1179 {
1180         volatile unsigned char __iomem *v = via;
1181
1182         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1183         out_8(&v[SR], x);
1184         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1185         (void)in_8(&v[B]);
1186 }
1187
1188 static inline void
1189 recv_byte(void)
1190 {
1191         volatile unsigned char __iomem *v = via;
1192
1193         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1194         in_8(&v[SR]);           /* resets SR */
1195         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1196         (void)in_8(&v[B]);
1197 }
1198
1199 static inline void
1200 pmu_done(struct adb_request *req)
1201 {
1202         void (*done)(struct adb_request *) = req->done;
1203         mb();
1204         req->complete = 1;
1205         /* Here, we assume that if the request has a done member, the
1206          * struct request will survive to setting req->complete to 1
1207          */
1208         if (done)
1209                 (*done)(req);
1210 }
1211
1212 static void
1213 pmu_start(void)
1214 {
1215         struct adb_request *req;
1216
1217         /* assert pmu_state == idle */
1218         /* get the packet to send */
1219         req = current_req;
1220         if (req == 0 || pmu_state != idle
1221             || (/*req->reply_expected && */req_awaiting_reply))
1222                 return;
1223
1224         pmu_state = sending;
1225         data_index = 1;
1226         data_len = pmu_data_len[req->data[0]][0];
1227
1228         /* Sounds safer to make sure ACK is high before writing. This helped
1229          * kill a problem with ADB and some iBooks
1230          */
1231         wait_for_ack();
1232         /* set the shift register to shift out and send a byte */
1233         send_byte(req->data[0]);
1234 }
1235
1236 void
1237 pmu_poll(void)
1238 {
1239         if (!via)
1240                 return;
1241         if (disable_poll)
1242                 return;
1243         via_pmu_interrupt(0, NULL);
1244 }
1245
1246 void
1247 pmu_poll_adb(void)
1248 {
1249         if (!via)
1250                 return;
1251         if (disable_poll)
1252                 return;
1253         /* Kicks ADB read when PMU is suspended */
1254         adb_int_pending = 1;
1255         do {
1256                 via_pmu_interrupt(0, NULL);
1257         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1258                 || req_awaiting_reply));
1259 }
1260
1261 void
1262 pmu_wait_complete(struct adb_request *req)
1263 {
1264         if (!via)
1265                 return;
1266         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1267                 via_pmu_interrupt(0, NULL);
1268 }
1269
1270 /* This function loops until the PMU is idle and prevents it from
1271  * anwsering to ADB interrupts. pmu_request can still be called.
1272  * This is done to avoid spurrious shutdowns when we know we'll have
1273  * interrupts switched off for a long time
1274  */
1275 void
1276 pmu_suspend(void)
1277 {
1278         unsigned long flags;
1279
1280         if (!via)
1281                 return;
1282
1283         spin_lock_irqsave(&pmu_lock, flags);
1284         pmu_suspended++;
1285         if (pmu_suspended > 1) {
1286                 spin_unlock_irqrestore(&pmu_lock, flags);
1287                 return;
1288         }
1289
1290         do {
1291                 spin_unlock_irqrestore(&pmu_lock, flags);
1292                 if (req_awaiting_reply)
1293                         adb_int_pending = 1;
1294                 via_pmu_interrupt(0, NULL);
1295                 spin_lock_irqsave(&pmu_lock, flags);
1296                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1297                         if (gpio_irq >= 0)
1298                                 disable_irq_nosync(gpio_irq);
1299                         out_8(&via[IER], CB1_INT | IER_CLR);
1300                         spin_unlock_irqrestore(&pmu_lock, flags);
1301                         break;
1302                 }
1303         } while (1);
1304 }
1305
1306 void
1307 pmu_resume(void)
1308 {
1309         unsigned long flags;
1310
1311         if (!via || (pmu_suspended < 1))
1312                 return;
1313
1314         spin_lock_irqsave(&pmu_lock, flags);
1315         pmu_suspended--;
1316         if (pmu_suspended > 0) {
1317                 spin_unlock_irqrestore(&pmu_lock, flags);
1318                 return;
1319         }
1320         adb_int_pending = 1;
1321         if (gpio_irq >= 0)
1322                 enable_irq(gpio_irq);
1323         out_8(&via[IER], CB1_INT | IER_SET);
1324         spin_unlock_irqrestore(&pmu_lock, flags);
1325         pmu_poll();
1326 }
1327
1328 /* Interrupt data could be the result data from an ADB cmd */
1329 static void
1330 pmu_handle_data(unsigned char *data, int len)
1331 {
1332         unsigned char ints, pirq;
1333         int i = 0;
1334
1335         asleep = 0;
1336         if (drop_interrupts || len < 1) {
1337                 adb_int_pending = 0;
1338                 pmu_irq_stats[8]++;
1339                 return;
1340         }
1341
1342         /* Get PMU interrupt mask */
1343         ints = data[0];
1344
1345         /* Record zero interrupts for stats */
1346         if (ints == 0)
1347                 pmu_irq_stats[9]++;
1348
1349         /* Hack to deal with ADB autopoll flag */
1350         if (ints & PMU_INT_ADB)
1351                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1352
1353 next:
1354
1355         if (ints == 0) {
1356                 if (i > pmu_irq_stats[10])
1357                         pmu_irq_stats[10] = i;
1358                 return;
1359         }
1360
1361         for (pirq = 0; pirq < 8; pirq++)
1362                 if (ints & (1 << pirq))
1363                         break;
1364         pmu_irq_stats[pirq]++;
1365         i++;
1366         ints &= ~(1 << pirq);
1367
1368         /* Note: for some reason, we get an interrupt with len=1,
1369          * data[0]==0 after each normal ADB interrupt, at least
1370          * on the Pismo. Still investigating...  --BenH
1371          */
1372         if ((1 << pirq) & PMU_INT_ADB) {
1373                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1374                         struct adb_request *req = req_awaiting_reply;
1375                         if (req == 0) {
1376                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1377                                 return;
1378                         }
1379                         req_awaiting_reply = NULL;
1380                         if (len <= 2)
1381                                 req->reply_len = 0;
1382                         else {
1383                                 memcpy(req->reply, data + 1, len - 1);
1384                                 req->reply_len = len - 1;
1385                         }
1386                         pmu_done(req);
1387                 } else {
1388                         if (len == 4 && data[1] == 0x2c) {
1389                                 extern int xmon_wants_key, xmon_adb_keycode;
1390                                 if (xmon_wants_key) {
1391                                         xmon_adb_keycode = data[2];
1392                                         return;
1393                                 }
1394                         }
1395 #ifdef CONFIG_ADB
1396                         /*
1397                          * XXX On the [23]400 the PMU gives us an up
1398                          * event for keycodes 0x74 or 0x75 when the PC
1399                          * card eject buttons are released, so we
1400                          * ignore those events.
1401                          */
1402                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1403                               && data[1] == 0x2c && data[3] == 0xff
1404                               && (data[2] & ~1) == 0xf4))
1405                                 adb_input(data+1, len-1, 1);
1406 #endif /* CONFIG_ADB */
1407                 }
1408         }
1409         /* Sound/brightness button pressed */
1410         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1411 #ifdef CONFIG_PMAC_BACKLIGHT
1412                 if (len == 3)
1413                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1414 #endif
1415         }
1416         /* Tick interrupt */
1417         else if ((1 << pirq) & PMU_INT_TICK) {
1418                 /* Environement or tick interrupt, query batteries */
1419                 if (pmu_battery_count) {
1420                         if ((--query_batt_timer) == 0) {
1421                                 query_battery_state();
1422                                 query_batt_timer = BATTERY_POLLING_COUNT;
1423                         }
1424                 }
1425         }
1426         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1427                 if (pmu_battery_count)
1428                         query_battery_state();
1429                 pmu_pass_intr(data, len);
1430                 /* len == 6 is probably a bad check. But how do I
1431                  * know what PMU versions send what events here? */
1432                 if (len == 6) {
1433                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1434                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1435                 }
1436         } else {
1437                pmu_pass_intr(data, len);
1438         }
1439         goto next;
1440 }
1441
1442 static struct adb_request*
1443 pmu_sr_intr(void)
1444 {
1445         struct adb_request *req;
1446         int bite = 0;
1447
1448         if (via[B] & TREQ) {
1449                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1450                 out_8(&via[IFR], SR_INT);
1451                 return NULL;
1452         }
1453         /* The ack may not yet be low when we get the interrupt */
1454         while ((in_8(&via[B]) & TACK) != 0)
1455                         ;
1456
1457         /* if reading grab the byte, and reset the interrupt */
1458         if (pmu_state == reading || pmu_state == reading_intr)
1459                 bite = in_8(&via[SR]);
1460
1461         /* reset TREQ and wait for TACK to go high */
1462         out_8(&via[B], in_8(&via[B]) | TREQ);
1463         wait_for_ack();
1464
1465         switch (pmu_state) {
1466         case sending:
1467                 req = current_req;
1468                 if (data_len < 0) {
1469                         data_len = req->nbytes - 1;
1470                         send_byte(data_len);
1471                         break;
1472                 }
1473                 if (data_index <= data_len) {
1474                         send_byte(req->data[data_index++]);
1475                         break;
1476                 }
1477                 req->sent = 1;
1478                 data_len = pmu_data_len[req->data[0]][1];
1479                 if (data_len == 0) {
1480                         pmu_state = idle;
1481                         current_req = req->next;
1482                         if (req->reply_expected)
1483                                 req_awaiting_reply = req;
1484                         else
1485                                 return req;
1486                 } else {
1487                         pmu_state = reading;
1488                         data_index = 0;
1489                         reply_ptr = req->reply + req->reply_len;
1490                         recv_byte();
1491                 }
1492                 break;
1493
1494         case intack:
1495                 data_index = 0;
1496                 data_len = -1;
1497                 pmu_state = reading_intr;
1498                 reply_ptr = interrupt_data[int_data_last];
1499                 recv_byte();
1500                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1501                         enable_irq(gpio_irq);
1502                         gpio_irq_enabled = 1;
1503                 }
1504                 break;
1505
1506         case reading:
1507         case reading_intr:
1508                 if (data_len == -1) {
1509                         data_len = bite;
1510                         if (bite > 32)
1511                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1512                 } else if (data_index < 32) {
1513                         reply_ptr[data_index++] = bite;
1514                 }
1515                 if (data_index < data_len) {
1516                         recv_byte();
1517                         break;
1518                 }
1519
1520                 if (pmu_state == reading_intr) {
1521                         pmu_state = idle;
1522                         int_data_state[int_data_last] = int_data_ready;
1523                         interrupt_data_len[int_data_last] = data_len;
1524                 } else {
1525                         req = current_req;
1526                         /*
1527                          * For PMU sleep and freq change requests, we lock the
1528                          * PMU until it's explicitly unlocked. This avoids any
1529                          * spurrious event polling getting in
1530                          */
1531                         current_req = req->next;
1532                         req->reply_len += data_index;
1533                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1534                                 pmu_state = locked;
1535                         else
1536                                 pmu_state = idle;
1537                         return req;
1538                 }
1539                 break;
1540
1541         default:
1542                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1543                        pmu_state);
1544         }
1545         return NULL;
1546 }
1547
1548 static irqreturn_t
1549 via_pmu_interrupt(int irq, void *arg)
1550 {
1551         unsigned long flags;
1552         int intr;
1553         int nloop = 0;
1554         int int_data = -1;
1555         struct adb_request *req = NULL;
1556         int handled = 0;
1557
1558         /* This is a bit brutal, we can probably do better */
1559         spin_lock_irqsave(&pmu_lock, flags);
1560         ++disable_poll;
1561
1562         for (;;) {
1563                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1564                 if (intr == 0)
1565                         break;
1566                 handled = 1;
1567                 if (++nloop > 1000) {
1568                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1569                                "intr=%x, ier=%x pmu_state=%d\n",
1570                                intr, in_8(&via[IER]), pmu_state);
1571                         break;
1572                 }
1573                 out_8(&via[IFR], intr);
1574                 if (intr & CB1_INT) {
1575                         adb_int_pending = 1;
1576                         pmu_irq_stats[0]++;
1577                 }
1578                 if (intr & SR_INT) {
1579                         req = pmu_sr_intr();
1580                         if (req)
1581                                 break;
1582                 }
1583         }
1584
1585 recheck:
1586         if (pmu_state == idle) {
1587                 if (adb_int_pending) {
1588                         if (int_data_state[0] == int_data_empty)
1589                                 int_data_last = 0;
1590                         else if (int_data_state[1] == int_data_empty)
1591                                 int_data_last = 1;
1592                         else
1593                                 goto no_free_slot;
1594                         pmu_state = intack;
1595                         int_data_state[int_data_last] = int_data_fill;
1596                         /* Sounds safer to make sure ACK is high before writing.
1597                          * This helped kill a problem with ADB and some iBooks
1598                          */
1599                         wait_for_ack();
1600                         send_byte(PMU_INT_ACK);
1601                         adb_int_pending = 0;
1602                 } else if (current_req)
1603                         pmu_start();
1604         }
1605 no_free_slot:
1606         /* Mark the oldest buffer for flushing */
1607         if (int_data_state[!int_data_last] == int_data_ready) {
1608                 int_data_state[!int_data_last] = int_data_flush;
1609                 int_data = !int_data_last;
1610         } else if (int_data_state[int_data_last] == int_data_ready) {
1611                 int_data_state[int_data_last] = int_data_flush;
1612                 int_data = int_data_last;
1613         }
1614         --disable_poll;
1615         spin_unlock_irqrestore(&pmu_lock, flags);
1616
1617         /* Deal with completed PMU requests outside of the lock */
1618         if (req) {
1619                 pmu_done(req);
1620                 req = NULL;
1621         }
1622
1623         /* Deal with interrupt datas outside of the lock */
1624         if (int_data >= 0) {
1625                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1626                 spin_lock_irqsave(&pmu_lock, flags);
1627                 ++disable_poll;
1628                 int_data_state[int_data] = int_data_empty;
1629                 int_data = -1;
1630                 goto recheck;
1631         }
1632
1633         return IRQ_RETVAL(handled);
1634 }
1635
1636 void
1637 pmu_unlock(void)
1638 {
1639         unsigned long flags;
1640
1641         spin_lock_irqsave(&pmu_lock, flags);
1642         if (pmu_state == locked)
1643                 pmu_state = idle;
1644         adb_int_pending = 1;
1645         spin_unlock_irqrestore(&pmu_lock, flags);
1646 }
1647
1648
1649 static irqreturn_t
1650 gpio1_interrupt(int irq, void *arg)
1651 {
1652         unsigned long flags;
1653
1654         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1655                 spin_lock_irqsave(&pmu_lock, flags);
1656                 if (gpio_irq_enabled > 0) {
1657                         disable_irq_nosync(gpio_irq);
1658                         gpio_irq_enabled = 0;
1659                 }
1660                 pmu_irq_stats[1]++;
1661                 adb_int_pending = 1;
1662                 spin_unlock_irqrestore(&pmu_lock, flags);
1663                 via_pmu_interrupt(0, NULL);
1664                 return IRQ_HANDLED;
1665         }
1666         return IRQ_NONE;
1667 }
1668
1669 void
1670 pmu_enable_irled(int on)
1671 {
1672         struct adb_request req;
1673
1674         if (vias == NULL)
1675                 return ;
1676         if (pmu_kind == PMU_KEYLARGO_BASED)
1677                 return ;
1678
1679         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1680             (on ? PMU_POW_ON : PMU_POW_OFF));
1681         pmu_wait_complete(&req);
1682 }
1683
1684 void
1685 pmu_restart(void)
1686 {
1687         struct adb_request req;
1688
1689         if (via == NULL)
1690                 return;
1691
1692         local_irq_disable();
1693
1694         drop_interrupts = 1;
1695
1696         if (pmu_kind != PMU_KEYLARGO_BASED) {
1697                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1698                                                 PMU_INT_TICK );
1699                 while(!req.complete)
1700                         pmu_poll();
1701         }
1702
1703         pmu_request(&req, NULL, 1, PMU_RESET);
1704         pmu_wait_complete(&req);
1705         for (;;)
1706                 ;
1707 }
1708
1709 void
1710 pmu_shutdown(void)
1711 {
1712         struct adb_request req;
1713
1714         if (via == NULL)
1715                 return;
1716
1717         local_irq_disable();
1718
1719         drop_interrupts = 1;
1720
1721         if (pmu_kind != PMU_KEYLARGO_BASED) {
1722                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1723                                                 PMU_INT_TICK );
1724                 pmu_wait_complete(&req);
1725         } else {
1726                 /* Disable server mode on shutdown or we'll just
1727                  * wake up again
1728                  */
1729                 pmu_set_server_mode(0);
1730         }
1731
1732         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1733                     'M', 'A', 'T', 'T');
1734         pmu_wait_complete(&req);
1735         for (;;)
1736                 ;
1737 }
1738
1739 int
1740 pmu_present(void)
1741 {
1742         return via != 0;
1743 }
1744
1745 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1746 /*
1747  * Put the powerbook to sleep.
1748  */
1749
1750 static u32 save_via[8];
1751
1752 static void
1753 save_via_state(void)
1754 {
1755         save_via[0] = in_8(&via[ANH]);
1756         save_via[1] = in_8(&via[DIRA]);
1757         save_via[2] = in_8(&via[B]);
1758         save_via[3] = in_8(&via[DIRB]);
1759         save_via[4] = in_8(&via[PCR]);
1760         save_via[5] = in_8(&via[ACR]);
1761         save_via[6] = in_8(&via[T1CL]);
1762         save_via[7] = in_8(&via[T1CH]);
1763 }
1764 static void
1765 restore_via_state(void)
1766 {
1767         out_8(&via[ANH], save_via[0]);
1768         out_8(&via[DIRA], save_via[1]);
1769         out_8(&via[B], save_via[2]);
1770         out_8(&via[DIRB], save_via[3]);
1771         out_8(&via[PCR], save_via[4]);
1772         out_8(&via[ACR], save_via[5]);
1773         out_8(&via[T1CL], save_via[6]);
1774         out_8(&via[T1CH], save_via[7]);
1775         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
1776         out_8(&via[IFR], 0x7f);                         /* clear IFR */
1777         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
1778 }
1779
1780 #define GRACKLE_PM      (1<<7)
1781 #define GRACKLE_DOZE    (1<<5)
1782 #define GRACKLE_NAP     (1<<4)
1783 #define GRACKLE_SLEEP   (1<<3)
1784
1785 static int powerbook_sleep_grackle(void)
1786 {
1787         unsigned long save_l2cr;
1788         unsigned short pmcr1;
1789         struct adb_request req;
1790         struct pci_dev *grackle;
1791
1792         grackle = pci_get_bus_and_slot(0, 0);
1793         if (!grackle)
1794                 return -ENODEV;
1795
1796         /* Turn off various things. Darwin does some retry tests here... */
1797         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1798         pmu_wait_complete(&req);
1799         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1800                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1801         pmu_wait_complete(&req);
1802
1803         /* For 750, save backside cache setting and disable it */
1804         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1805
1806         if (!__fake_sleep) {
1807                 /* Ask the PMU to put us to sleep */
1808                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1809                 pmu_wait_complete(&req);
1810         }
1811
1812         /* The VIA is supposed not to be restored correctly*/
1813         save_via_state();
1814         /* We shut down some HW */
1815         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1816
1817         pci_read_config_word(grackle, 0x70, &pmcr1);
1818         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1819         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1820         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1821         pci_write_config_word(grackle, 0x70, pmcr1);
1822
1823         /* Call low-level ASM sleep handler */
1824         if (__fake_sleep)
1825                 mdelay(5000);
1826         else
1827                 low_sleep_handler();
1828
1829         /* We're awake again, stop grackle PM */
1830         pci_read_config_word(grackle, 0x70, &pmcr1);
1831         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1832         pci_write_config_word(grackle, 0x70, pmcr1);
1833
1834         pci_dev_put(grackle);
1835
1836         /* Make sure the PMU is idle */
1837         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1838         restore_via_state();
1839
1840         /* Restore L2 cache */
1841         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1842                 _set_L2CR(save_l2cr);
1843
1844         /* Restore userland MMU context */
1845         switch_mmu_context(NULL, current->active_mm);
1846
1847         /* Power things up */
1848         pmu_unlock();
1849         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1850         pmu_wait_complete(&req);
1851         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1852                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1853         pmu_wait_complete(&req);
1854         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1855                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1856         pmu_wait_complete(&req);
1857
1858         return 0;
1859 }
1860
1861 static int
1862 powerbook_sleep_Core99(void)
1863 {
1864         unsigned long save_l2cr;
1865         unsigned long save_l3cr;
1866         struct adb_request req;
1867
1868         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1869                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1870                 return -ENOSYS;
1871         }
1872
1873         if (num_online_cpus() > 1 || cpu_is_offline(0))
1874                 return -EAGAIN;
1875
1876         /* Stop environment and ADB interrupts */
1877         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1878         pmu_wait_complete(&req);
1879
1880         /* Tell PMU what events will wake us up */
1881         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1882                 0xff, 0xff);
1883         pmu_wait_complete(&req);
1884         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1885                 0, PMU_PWR_WAKEUP_KEY |
1886                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1887         pmu_wait_complete(&req);
1888
1889         /* Save the state of the L2 and L3 caches */
1890         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1891         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1892
1893         if (!__fake_sleep) {
1894                 /* Ask the PMU to put us to sleep */
1895                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1896                 pmu_wait_complete(&req);
1897         }
1898
1899         /* The VIA is supposed not to be restored correctly*/
1900         save_via_state();
1901
1902         /* Shut down various ASICs. There's a chance that we can no longer
1903          * talk to the PMU after this, so I moved it to _after_ sending the
1904          * sleep command to it. Still need to be checked.
1905          */
1906         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1907
1908         /* Call low-level ASM sleep handler */
1909         if (__fake_sleep)
1910                 mdelay(5000);
1911         else
1912                 low_sleep_handler();
1913
1914         /* Restore Apple core ASICs state */
1915         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
1916
1917         /* Restore VIA */
1918         restore_via_state();
1919
1920         /* tweak LPJ before cpufreq is there */
1921         loops_per_jiffy *= 2;
1922
1923         /* Restore video */
1924         pmac_call_early_video_resume();
1925
1926         /* Restore L2 cache */
1927         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1928                 _set_L2CR(save_l2cr);
1929         /* Restore L3 cache */
1930         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
1931                 _set_L3CR(save_l3cr);
1932
1933         /* Restore userland MMU context */
1934         switch_mmu_context(NULL, current->active_mm);
1935
1936         /* Tell PMU we are ready */
1937         pmu_unlock();
1938         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
1939         pmu_wait_complete(&req);
1940         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1941         pmu_wait_complete(&req);
1942
1943         /* Restore LPJ, cpufreq will adjust the cpu frequency */
1944         loops_per_jiffy /= 2;
1945
1946         return 0;
1947 }
1948
1949 #define PB3400_MEM_CTRL         0xf8000000
1950 #define PB3400_MEM_CTRL_SLEEP   0x70
1951
1952 static void __iomem *pb3400_mem_ctrl;
1953
1954 static void powerbook_sleep_init_3400(void)
1955 {
1956         /* map in the memory controller registers */
1957         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
1958         if (pb3400_mem_ctrl == NULL)
1959                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
1960 }
1961
1962 static int powerbook_sleep_3400(void)
1963 {
1964         int i, x;
1965         unsigned int hid0;
1966         unsigned long msr;
1967         struct adb_request sleep_req;
1968         unsigned int __iomem *mem_ctrl_sleep;
1969
1970         if (pb3400_mem_ctrl == NULL)
1971                 return -ENOMEM;
1972         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
1973
1974         /* Set the memory controller to keep the memory refreshed
1975            while we're asleep */
1976         for (i = 0x403f; i >= 0x4000; --i) {
1977                 out_be32(mem_ctrl_sleep, i);
1978                 do {
1979                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
1980                 } while (x == 0);
1981                 if (x >= 0x100)
1982                         break;
1983         }
1984
1985         /* Ask the PMU to put us to sleep */
1986         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1987         pmu_wait_complete(&sleep_req);
1988         pmu_unlock();
1989
1990         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1991
1992         asleep = 1;
1993
1994         /* Put the CPU into sleep mode */
1995         hid0 = mfspr(SPRN_HID0);
1996         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
1997         mtspr(SPRN_HID0, hid0);
1998         local_irq_enable();
1999         msr = mfmsr() | MSR_POW;
2000         while (asleep) {
2001                 mb();
2002                 mtmsr(msr);
2003                 isync();
2004         }
2005         local_irq_disable();
2006
2007         /* OK, we're awake again, start restoring things */
2008         out_be32(mem_ctrl_sleep, 0x3f);
2009         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2010
2011         return 0;
2012 }
2013
2014 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2015
2016 /*
2017  * Support for /dev/pmu device
2018  */
2019 #define RB_SIZE         0x10
2020 struct pmu_private {
2021         struct list_head list;
2022         int     rb_get;
2023         int     rb_put;
2024         struct rb_entry {
2025                 unsigned short len;
2026                 unsigned char data[16];
2027         }       rb_buf[RB_SIZE];
2028         wait_queue_head_t wait;
2029         spinlock_t lock;
2030 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2031         int     backlight_locker;
2032 #endif
2033 };
2034
2035 static LIST_HEAD(all_pmu_pvt);
2036 static DEFINE_SPINLOCK(all_pvt_lock);
2037
2038 static void
2039 pmu_pass_intr(unsigned char *data, int len)
2040 {
2041         struct pmu_private *pp;
2042         struct list_head *list;
2043         int i;
2044         unsigned long flags;
2045
2046         if (len > sizeof(pp->rb_buf[0].data))
2047                 len = sizeof(pp->rb_buf[0].data);
2048         spin_lock_irqsave(&all_pvt_lock, flags);
2049         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2050                 pp = list_entry(list, struct pmu_private, list);
2051                 spin_lock(&pp->lock);
2052                 i = pp->rb_put + 1;
2053                 if (i >= RB_SIZE)
2054                         i = 0;
2055                 if (i != pp->rb_get) {
2056                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2057                         rp->len = len;
2058                         memcpy(rp->data, data, len);
2059                         pp->rb_put = i;
2060                         wake_up_interruptible(&pp->wait);
2061                 }
2062                 spin_unlock(&pp->lock);
2063         }
2064         spin_unlock_irqrestore(&all_pvt_lock, flags);
2065 }
2066
2067 static int
2068 pmu_open(struct inode *inode, struct file *file)
2069 {
2070         struct pmu_private *pp;
2071         unsigned long flags;
2072
2073         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2074         if (pp == 0)
2075                 return -ENOMEM;
2076         pp->rb_get = pp->rb_put = 0;
2077         spin_lock_init(&pp->lock);
2078         init_waitqueue_head(&pp->wait);
2079         lock_kernel();
2080         spin_lock_irqsave(&all_pvt_lock, flags);
2081 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2082         pp->backlight_locker = 0;
2083 #endif
2084         list_add(&pp->list, &all_pmu_pvt);
2085         spin_unlock_irqrestore(&all_pvt_lock, flags);
2086         file->private_data = pp;
2087         unlock_kernel();
2088         return 0;
2089 }
2090
2091 static ssize_t
2092 pmu_read(struct file *file, char __user *buf,
2093                         size_t count, loff_t *ppos)
2094 {
2095         struct pmu_private *pp = file->private_data;
2096         DECLARE_WAITQUEUE(wait, current);
2097         unsigned long flags;
2098         int ret = 0;
2099
2100         if (count < 1 || pp == 0)
2101                 return -EINVAL;
2102         if (!access_ok(VERIFY_WRITE, buf, count))
2103                 return -EFAULT;
2104
2105         spin_lock_irqsave(&pp->lock, flags);
2106         add_wait_queue(&pp->wait, &wait);
2107         current->state = TASK_INTERRUPTIBLE;
2108
2109         for (;;) {
2110                 ret = -EAGAIN;
2111                 if (pp->rb_get != pp->rb_put) {
2112                         int i = pp->rb_get;
2113                         struct rb_entry *rp = &pp->rb_buf[i];
2114                         ret = rp->len;
2115                         spin_unlock_irqrestore(&pp->lock, flags);
2116                         if (ret > count)
2117                                 ret = count;
2118                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2119                                 ret = -EFAULT;
2120                         if (++i >= RB_SIZE)
2121                                 i = 0;
2122                         spin_lock_irqsave(&pp->lock, flags);
2123                         pp->rb_get = i;
2124                 }
2125                 if (ret >= 0)
2126                         break;
2127                 if (file->f_flags & O_NONBLOCK)
2128                         break;
2129                 ret = -ERESTARTSYS;
2130                 if (signal_pending(current))
2131                         break;
2132                 spin_unlock_irqrestore(&pp->lock, flags);
2133                 schedule();
2134                 spin_lock_irqsave(&pp->lock, flags);
2135         }
2136         current->state = TASK_RUNNING;
2137         remove_wait_queue(&pp->wait, &wait);
2138         spin_unlock_irqrestore(&pp->lock, flags);
2139
2140         return ret;
2141 }
2142
2143 static ssize_t
2144 pmu_write(struct file *file, const char __user *buf,
2145                          size_t count, loff_t *ppos)
2146 {
2147         return 0;
2148 }
2149
2150 static unsigned int
2151 pmu_fpoll(struct file *filp, poll_table *wait)
2152 {
2153         struct pmu_private *pp = filp->private_data;
2154         unsigned int mask = 0;
2155         unsigned long flags;
2156
2157         if (pp == 0)
2158                 return 0;
2159         poll_wait(filp, &pp->wait, wait);
2160         spin_lock_irqsave(&pp->lock, flags);
2161         if (pp->rb_get != pp->rb_put)
2162                 mask |= POLLIN;
2163         spin_unlock_irqrestore(&pp->lock, flags);
2164         return mask;
2165 }
2166
2167 static int
2168 pmu_release(struct inode *inode, struct file *file)
2169 {
2170         struct pmu_private *pp = file->private_data;
2171         unsigned long flags;
2172
2173         if (pp != 0) {
2174                 file->private_data = NULL;
2175                 spin_lock_irqsave(&all_pvt_lock, flags);
2176                 list_del(&pp->list);
2177                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2178
2179 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2180                 if (pp->backlight_locker)
2181                         pmac_backlight_enable();
2182 #endif
2183
2184                 kfree(pp);
2185         }
2186         return 0;
2187 }
2188
2189 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2190 static void pmac_suspend_disable_irqs(void)
2191 {
2192         /* Call platform functions marked "on sleep" */
2193         pmac_pfunc_i2c_suspend();
2194         pmac_pfunc_base_suspend();
2195 }
2196
2197 static int powerbook_sleep(suspend_state_t state)
2198 {
2199         int error = 0;
2200
2201         /* Wait for completion of async requests */
2202         while (!batt_req.complete)
2203                 pmu_poll();
2204
2205         /* Giveup the lazy FPU & vec so we don't have to back them
2206          * up from the low level code
2207          */
2208         enable_kernel_fp();
2209
2210 #ifdef CONFIG_ALTIVEC
2211         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2212                 enable_kernel_altivec();
2213 #endif /* CONFIG_ALTIVEC */
2214
2215         switch (pmu_kind) {
2216         case PMU_OHARE_BASED:
2217                 error = powerbook_sleep_3400();
2218                 break;
2219         case PMU_HEATHROW_BASED:
2220         case PMU_PADDINGTON_BASED:
2221                 error = powerbook_sleep_grackle();
2222                 break;
2223         case PMU_KEYLARGO_BASED:
2224                 error = powerbook_sleep_Core99();
2225                 break;
2226         default:
2227                 return -ENOSYS;
2228         }
2229
2230         if (error)
2231                 return error;
2232
2233         mdelay(100);
2234
2235         return 0;
2236 }
2237
2238 static void pmac_suspend_enable_irqs(void)
2239 {
2240         /* Force a poll of ADB interrupts */
2241         adb_int_pending = 1;
2242         via_pmu_interrupt(0, NULL);
2243
2244         mdelay(10);
2245
2246         /* Call platform functions marked "on wake" */
2247         pmac_pfunc_base_resume();
2248         pmac_pfunc_i2c_resume();
2249 }
2250
2251 static int pmu_sleep_valid(suspend_state_t state)
2252 {
2253         return state == PM_SUSPEND_MEM
2254                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2255 }
2256
2257 static struct platform_suspend_ops pmu_pm_ops = {
2258         .enter = powerbook_sleep,
2259         .valid = pmu_sleep_valid,
2260 };
2261
2262 static int register_pmu_pm_ops(void)
2263 {
2264         if (pmu_kind == PMU_OHARE_BASED)
2265                 powerbook_sleep_init_3400();
2266         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2267         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2268         suspend_set_ops(&pmu_pm_ops);
2269
2270         return 0;
2271 }
2272
2273 device_initcall(register_pmu_pm_ops);
2274 #endif
2275
2276 static int pmu_ioctl(struct file *filp,
2277                      u_int cmd, u_long arg)
2278 {
2279         __u32 __user *argp = (__u32 __user *)arg;
2280         int error = -EINVAL;
2281
2282         switch (cmd) {
2283         case PMU_IOC_SLEEP:
2284                 if (!capable(CAP_SYS_ADMIN))
2285                         return -EACCES;
2286                 return pm_suspend(PM_SUSPEND_MEM);
2287         case PMU_IOC_CAN_SLEEP:
2288                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2289                         return put_user(0, argp);
2290                 else
2291                         return put_user(1, argp);
2292
2293 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2294         /* Compatibility ioctl's for backlight */
2295         case PMU_IOC_GET_BACKLIGHT:
2296         {
2297                 int brightness;
2298
2299                 brightness = pmac_backlight_get_legacy_brightness();
2300                 if (brightness < 0)
2301                         return brightness;
2302                 else
2303                         return put_user(brightness, argp);
2304
2305         }
2306         case PMU_IOC_SET_BACKLIGHT:
2307         {
2308                 int brightness;
2309
2310                 error = get_user(brightness, argp);
2311                 if (error)
2312                         return error;
2313
2314                 return pmac_backlight_set_legacy_brightness(brightness);
2315         }
2316 #ifdef CONFIG_INPUT_ADBHID
2317         case PMU_IOC_GRAB_BACKLIGHT: {
2318                 struct pmu_private *pp = filp->private_data;
2319
2320                 if (pp->backlight_locker)
2321                         return 0;
2322
2323                 pp->backlight_locker = 1;
2324                 pmac_backlight_disable();
2325
2326                 return 0;
2327         }
2328 #endif /* CONFIG_INPUT_ADBHID */
2329 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2330
2331         case PMU_IOC_GET_MODEL:
2332                 return put_user(pmu_kind, argp);
2333         case PMU_IOC_HAS_ADB:
2334                 return put_user(pmu_has_adb, argp);
2335         }
2336         return error;
2337 }
2338
2339 static long pmu_unlocked_ioctl(struct file *filp,
2340                                u_int cmd, u_long arg)
2341 {
2342         int ret;
2343
2344         lock_kernel();
2345         ret = pmu_ioctl(filp, cmd, arg);
2346         unlock_kernel();
2347
2348         return ret;
2349 }
2350
2351 static const struct file_operations pmu_device_fops = {
2352         .read           = pmu_read,
2353         .write          = pmu_write,
2354         .poll           = pmu_fpoll,
2355         .unlocked_ioctl = pmu_unlocked_ioctl,
2356         .open           = pmu_open,
2357         .release        = pmu_release,
2358 };
2359
2360 static struct miscdevice pmu_device = {
2361         PMU_MINOR, "pmu", &pmu_device_fops
2362 };
2363
2364 static int pmu_device_init(void)
2365 {
2366         if (!via)
2367                 return 0;
2368         if (misc_register(&pmu_device) < 0)
2369                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2370         return 0;
2371 }
2372 device_initcall(pmu_device_init);
2373
2374
2375 #ifdef DEBUG_SLEEP
2376 static inline void
2377 polled_handshake(volatile unsigned char __iomem *via)
2378 {
2379         via[B] &= ~TREQ; eieio();
2380         while ((via[B] & TACK) != 0)
2381                 ;
2382         via[B] |= TREQ; eieio();
2383         while ((via[B] & TACK) == 0)
2384                 ;
2385 }
2386
2387 static inline void
2388 polled_send_byte(volatile unsigned char __iomem *via, int x)
2389 {
2390         via[ACR] |= SR_OUT | SR_EXT; eieio();
2391         via[SR] = x; eieio();
2392         polled_handshake(via);
2393 }
2394
2395 static inline int
2396 polled_recv_byte(volatile unsigned char __iomem *via)
2397 {
2398         int x;
2399
2400         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
2401         x = via[SR]; eieio();
2402         polled_handshake(via);
2403         x = via[SR]; eieio();
2404         return x;
2405 }
2406
2407 int
2408 pmu_polled_request(struct adb_request *req)
2409 {
2410         unsigned long flags;
2411         int i, l, c;
2412         volatile unsigned char __iomem *v = via;
2413
2414         req->complete = 1;
2415         c = req->data[0];
2416         l = pmu_data_len[c][0];
2417         if (l >= 0 && req->nbytes != l + 1)
2418                 return -EINVAL;
2419
2420         local_irq_save(flags);
2421         while (pmu_state != idle)
2422                 pmu_poll();
2423
2424         while ((via[B] & TACK) == 0)
2425                 ;
2426         polled_send_byte(v, c);
2427         if (l < 0) {
2428                 l = req->nbytes - 1;
2429                 polled_send_byte(v, l);
2430         }
2431         for (i = 1; i <= l; ++i)
2432                 polled_send_byte(v, req->data[i]);
2433
2434         l = pmu_data_len[c][1];
2435         if (l < 0)
2436                 l = polled_recv_byte(v);
2437         for (i = 0; i < l; ++i)
2438                 req->reply[i + req->reply_len] = polled_recv_byte(v);
2439
2440         if (req->done)
2441                 (*req->done)(req);
2442
2443         local_irq_restore(flags);
2444         return 0;
2445 }
2446
2447 /* N.B. This doesn't work on the 3400 */
2448 void pmu_blink(int n)
2449 {
2450         struct adb_request req;
2451
2452         memset(&req, 0, sizeof(req));
2453
2454         for (; n > 0; --n) {
2455                 req.nbytes = 4;
2456                 req.done = NULL;
2457                 req.data[0] = 0xee;
2458                 req.data[1] = 4;
2459                 req.data[2] = 0;
2460                 req.data[3] = 1;
2461                 req.reply[0] = ADB_RET_OK;
2462                 req.reply_len = 1;
2463                 req.reply_expected = 0;
2464                 pmu_polled_request(&req);
2465                 mdelay(50);
2466                 req.nbytes = 4;
2467                 req.done = NULL;
2468                 req.data[0] = 0xee;
2469                 req.data[1] = 4;
2470                 req.data[2] = 0;
2471                 req.data[3] = 0;
2472                 req.reply[0] = ADB_RET_OK;
2473                 req.reply_len = 1;
2474                 req.reply_expected = 0;
2475                 pmu_polled_request(&req);
2476                 mdelay(50);
2477         }
2478         mdelay(50);
2479 }
2480 #endif /* DEBUG_SLEEP */
2481
2482 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2483 int pmu_sys_suspended;
2484
2485 static int pmu_sys_suspend(struct sys_device *sysdev, pm_message_t state)
2486 {
2487         if (state.event != PM_EVENT_SUSPEND || pmu_sys_suspended)
2488                 return 0;
2489
2490         /* Suspend PMU event interrupts */\
2491         pmu_suspend();
2492         pmu_sys_suspended = 1;
2493
2494 #ifdef CONFIG_PMAC_BACKLIGHT
2495         /* Tell backlight code not to muck around with the chip anymore */
2496         pmu_backlight_set_sleep(1);
2497 #endif
2498
2499         return 0;
2500 }
2501
2502 static int pmu_sys_resume(struct sys_device *sysdev)
2503 {
2504         struct adb_request req;
2505
2506         if (!pmu_sys_suspended)
2507                 return 0;
2508
2509         /* Tell PMU we are ready */
2510         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2511         pmu_wait_complete(&req);
2512
2513 #ifdef CONFIG_PMAC_BACKLIGHT
2514         /* Tell backlight code it can use the chip again */
2515         pmu_backlight_set_sleep(0);
2516 #endif
2517         /* Resume PMU event interrupts */
2518         pmu_resume();
2519         pmu_sys_suspended = 0;
2520
2521         return 0;
2522 }
2523
2524 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2525
2526 static struct sysdev_class pmu_sysclass = {
2527         .name = "pmu",
2528 };
2529
2530 static struct sys_device device_pmu = {
2531         .cls            = &pmu_sysclass,
2532 };
2533
2534 static struct sysdev_driver driver_pmu = {
2535 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2536         .suspend        = &pmu_sys_suspend,
2537         .resume         = &pmu_sys_resume,
2538 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2539 };
2540
2541 static int __init init_pmu_sysfs(void)
2542 {
2543         int rc;
2544
2545         rc = sysdev_class_register(&pmu_sysclass);
2546         if (rc) {
2547                 printk(KERN_ERR "Failed registering PMU sys class\n");
2548                 return -ENODEV;
2549         }
2550         rc = sysdev_register(&device_pmu);
2551         if (rc) {
2552                 printk(KERN_ERR "Failed registering PMU sys device\n");
2553                 return -ENODEV;
2554         }
2555         rc = sysdev_driver_register(&pmu_sysclass, &driver_pmu);
2556         if (rc) {
2557                 printk(KERN_ERR "Failed registering PMU sys driver\n");
2558                 return -ENODEV;
2559         }
2560         return 0;
2561 }
2562
2563 subsys_initcall(init_pmu_sysfs);
2564
2565 EXPORT_SYMBOL(pmu_request);
2566 EXPORT_SYMBOL(pmu_queue_request);
2567 EXPORT_SYMBOL(pmu_poll);
2568 EXPORT_SYMBOL(pmu_poll_adb);
2569 EXPORT_SYMBOL(pmu_wait_complete);
2570 EXPORT_SYMBOL(pmu_suspend);
2571 EXPORT_SYMBOL(pmu_resume);
2572 EXPORT_SYMBOL(pmu_unlock);
2573 #if defined(CONFIG_PPC32)
2574 EXPORT_SYMBOL(pmu_enable_irled);
2575 EXPORT_SYMBOL(pmu_battery_count);
2576 EXPORT_SYMBOL(pmu_batteries);
2577 EXPORT_SYMBOL(pmu_power_flags);
2578 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2579