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