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  *
  14  * THIS DRIVER IS BECOMING A TOTAL MESS !
  15  *  - Cleanup atomically disabling reply to PMU events after
  16  *    a sleep or a freq. switch
  17  *  - Move sleep code out of here to pmac_pm, merge into new
  18  *    common PM infrastructure
  19  *  - Move backlight code out as well
  20  *  - Save/Restore PCI space properly
  21  *
  22  */
  23 #include <stdarg.h>
  24 #include <linux/config.h>
  25 #include <linux/types.h>
  26 #include <linux/errno.h>
  27 #include <linux/kernel.h>
  28 #include <linux/delay.h>
  29 #include <linux/sched.h>
  30 #include <linux/miscdevice.h>
  31 #include <linux/blkdev.h>
  32 #include <linux/pci.h>
  33 #include <linux/slab.h>
  34 #include <linux/poll.h>
  35 #include <linux/adb.h>
  36 #include <linux/pmu.h>
  37 #include <linux/cuda.h>
  38 #include <linux/smp_lock.h>
  39 #include <linux/module.h>
  40 #include <linux/spinlock.h>
  41 #include <linux/pm.h>
  42 #include <linux/proc_fs.h>
  43 #include <linux/init.h>
  44 #include <linux/interrupt.h>
  45 #include <linux/device.h>
  46 #include <linux/suspend.h>
  47 #include <linux/syscalls.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/uaccess.h>
  57 #include <asm/mmu_context.h>
  58 #include <asm/cputable.h>
  59 #include <asm/time.h>
  60 #ifdef CONFIG_PMAC_BACKLIGHT
  61 #include <asm/backlight.h>
  62 #endif
  63
  64 /* Some compile options */
  65 #undef SUSPEND_USES_PMU
  66 #define DEBUG_SLEEP
  67 #undef HACKED_PCI_SAVE
  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 *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 adb_request bright_req_1, bright_req_2;
 140 static struct device_node *vias;
 141 static int pmu_kind = PMU_UNKNOWN;
 142 static int pmu_fully_inited = 0;
 143 static int pmu_has_adb;
 144 static unsigned char *gpio_reg = NULL;
 145 static int gpio_irq = -1;
 146 static int gpio_irq_enabled = -1;
 147 static volatile int pmu_suspended = 0;
 148 static spinlock_t pmu_lock;
 149 static u8 pmu_intr_mask;
 150 static int pmu_version;
 151 static int drop_interrupts;
 152 #ifdef CONFIG_PMAC_PBOOK
 153 static int option_lid_wakeup = 1;
 154 static int sleep_in_progress;
 155 static int can_sleep;
 156 static unsigned long async_req_locks;
 157 #endif /* CONFIG_PMAC_PBOOK */
 158 static unsigned int pmu_irq_stats[11];
 159
 160 static struct proc_dir_entry *proc_pmu_root;
 161 static struct proc_dir_entry *proc_pmu_info;
 162 static struct proc_dir_entry *proc_pmu_irqstats;
 163 static struct proc_dir_entry *proc_pmu_options;
 164 static int option_server_mode;
 165
 166 #ifdef CONFIG_PMAC_PBOOK
 167 int pmu_battery_count;
 168 int pmu_cur_battery;
 169 unsigned int pmu_power_flags;
 170 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 171 static int query_batt_timer = BATTERY_POLLING_COUNT;
 172 static struct adb_request batt_req;
 173 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 174 #endif /* CONFIG_PMAC_PBOOK */
 175
 176 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
 177 extern int disable_kernel_backlight;
 178 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
 179
 180 int __fake_sleep;
 181 int asleep;
 182 struct notifier_block *sleep_notifier_list;
 183
 184 #ifdef CONFIG_ADB
 185 static int adb_dev_map = 0;
 186 static int pmu_adb_flags;
 187
 188 static int pmu_probe(void);
 189 static int pmu_init(void);
 190 static int pmu_send_request(struct adb_request *req, int sync);
 191 static int pmu_adb_autopoll(int devs);
 192 static int pmu_adb_reset_bus(void);
 193 #endif /* CONFIG_ADB */
 194
 195 static int init_pmu(void);
 196 static int pmu_queue_request(struct adb_request *req);
 197 static void pmu_start(void);
 198 static irqreturn_t via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs);
 199 static irqreturn_t gpio1_interrupt(int irq, void *arg, struct pt_regs *regs);
 200 static int proc_get_info(char *page, char **start, off_t off,
 201                           int count, int *eof, void *data);
 202 static int proc_get_irqstats(char *page, char **start, off_t off,
 203                           int count, int *eof, void *data);
 204 #ifdef CONFIG_PMAC_BACKLIGHT
 205 static int pmu_set_backlight_level(int level, void* data);
 206 static int pmu_set_backlight_enable(int on, int level, void* data);
 207 #endif /* CONFIG_PMAC_BACKLIGHT */
 208 #ifdef CONFIG_PMAC_PBOOK
 209 static void pmu_pass_intr(unsigned char *data, int len);
 210 static int proc_get_batt(char *page, char **start, off_t off,
 211                         int count, int *eof, void *data);
 212 #endif /* CONFIG_PMAC_PBOOK */
 213 static int proc_read_options(char *page, char **start, off_t off,
 214                         int count, int *eof, void *data);
 215 static int proc_write_options(struct file *file, const char __user *buffer,
 216                         unsigned long count, void *data);
 217
 218 #ifdef CONFIG_ADB
 219 struct adb_driver via_pmu_driver = {
 220         "PMU",
 221         pmu_probe,
 222         pmu_init,
 223         pmu_send_request,
 224         pmu_adb_autopoll,
 225         pmu_poll_adb,
 226         pmu_adb_reset_bus
 227 };
 228 #endif /* CONFIG_ADB */
 229
 230 extern void low_sleep_handler(void);
 231 extern void enable_kernel_altivec(void);
 232 extern void enable_kernel_fp(void);
 233
 234 #ifdef DEBUG_SLEEP
 235 int pmu_polled_request(struct adb_request *req);
 236 int pmu_wink(struct adb_request *req);
 237 #endif
 238
 239 /*
 240  * This table indicates for each PMU opcode:
 241  * - the number of data bytes to be sent with the command, or -1
 242  *   if a length byte should be sent,
 243  * - the number of response bytes which the PMU will return, or
 244  *   -1 if it will send a length byte.
 245  */
 246 static const s8 pmu_data_len[256][2] __openfirmwaredata = {
 247 /*         0       1       2       3       4       5       6       7  */
 248 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 249 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 250 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 251 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 252 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 253 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 254 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 255 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 256 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 257 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 258 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 259 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 260 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 261 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 262 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 263 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 264 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 265 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 266 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 267 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 268 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 269 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 270 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 271 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 272 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 273 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 274 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 275 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 276 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 277 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 278 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 279 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 280 };
 281
 282 static char *pbook_type[] = {
 283         "Unknown PowerBook",
 284         "PowerBook 2400/3400/3500(G3)",
 285         "PowerBook G3 Series",
 286         "1999 PowerBook G3",
 287         "Core99"
 288 };
 289
 290 #ifdef CONFIG_PMAC_BACKLIGHT
 291 static struct backlight_controller pmu_backlight_controller = {
 292         pmu_set_backlight_enable,
 293         pmu_set_backlight_level
 294 };
 295 #endif /* CONFIG_PMAC_BACKLIGHT */
 296
 297 int __openfirmware
 298 find_via_pmu(void)
 299 {
 300         if (via != 0)
 301                 return 1;
 302         vias = find_devices("via-pmu");
 303         if (vias == 0)
 304                 return 0;
 305         if (vias->next != 0)
 306                 printk(KERN_WARNING "Warning: only using 1st via-pmu\n");
 307
 308         if (vias->n_addrs < 1 || vias->n_intrs < 1) {
 309                 printk(KERN_ERR "via-pmu: %d addresses, %d interrupts!\n",
 310                        vias->n_addrs, vias->n_intrs);
 311                 if (vias->n_addrs < 1 || vias->n_intrs < 1)
 312                         return 0;
 313         }
 314
 315         spin_lock_init(&pmu_lock);
 316
 317         pmu_has_adb = 1;
 318
 319         pmu_intr_mask = PMU_INT_PCEJECT |
 320                         PMU_INT_SNDBRT |
 321                         PMU_INT_ADB |
 322                         PMU_INT_TICK;
 323
 324         if (vias->parent->name && ((strcmp(vias->parent->name, "ohare") == 0)
 325             || device_is_compatible(vias->parent, "ohare")))
 326                 pmu_kind = PMU_OHARE_BASED;
 327         else if (device_is_compatible(vias->parent, "paddington"))
 328                 pmu_kind = PMU_PADDINGTON_BASED;
 329         else if (device_is_compatible(vias->parent, "heathrow"))
 330                 pmu_kind = PMU_HEATHROW_BASED;
 331         else if (device_is_compatible(vias->parent, "Keylargo")
 332                  || device_is_compatible(vias->parent, "K2-Keylargo")) {
 333                 struct device_node *gpio, *gpiop;
 334
 335                 pmu_kind = PMU_KEYLARGO_BASED;
 336                 pmu_has_adb = (find_type_devices("adb") != NULL);
 337                 pmu_intr_mask = PMU_INT_PCEJECT |
 338                                 PMU_INT_SNDBRT |
 339                                 PMU_INT_ADB |
 340                                 PMU_INT_TICK |
 341                                 PMU_INT_ENVIRONMENT;
 342
 343                 gpiop = find_devices("gpio");
 344                 if (gpiop && gpiop->n_addrs) {
 345                         gpio_reg = ioremap(gpiop->addrs->address, 0x10);
 346                         gpio = find_devices("extint-gpio1");
 347                         if (gpio == NULL)
 348                                 gpio = find_devices("pmu-interrupt");
 349                         if (gpio && gpio->parent == gpiop && gpio->n_intrs)
 350                                 gpio_irq = gpio->intrs[0].line;
 351                 }
 352         } else
 353                 pmu_kind = PMU_UNKNOWN;
 354
 355         via = (volatile unsigned char *) ioremap(vias->addrs->address, 0x2000);
 356
 357         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
 358         out_8(&via[IFR], 0x7f);                 /* clear IFR */
 359
 360         pmu_state = idle;
 361
 362         if (!init_pmu()) {
 363                 via = NULL;
 364                 return 0;
 365         }
 366
 367         printk(KERN_INFO "PMU driver %d initialized for %s, firmware: %02x\n",
 368                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 369
 370 #ifndef CONFIG_PPC64
 371         sys_ctrler = SYS_CTRLER_PMU;
 372 #endif
 373
 374         return 1;
 375 }
 376
 377 #ifdef CONFIG_ADB
 378 static int __openfirmware
 379 pmu_probe(void)
 380 {
 381         return vias == NULL? -ENODEV: 0;
 382 }
 383
 384 static int __init
 385 pmu_init(void)
 386 {
 387         if (vias == NULL)
 388                 return -ENODEV;
 389         return 0;
 390 }
 391 #endif /* CONFIG_ADB */
 392
 393 /*
 394  * We can't wait until pmu_init gets called, that happens too late.
 395  * It happens after IDE and SCSI initialization, which can take a few
 396  * seconds, and by that time the PMU could have given up on us and
 397  * turned us off.
 398  * Thus this is called with arch_initcall rather than device_initcall.
 399  */
 400 static int __init via_pmu_start(void)
 401 {
 402         if (vias == NULL)
 403                 return -ENODEV;
 404
 405         bright_req_1.complete = 1;
 406         bright_req_2.complete = 1;
 407 #ifdef CONFIG_PMAC_PBOOK
 408         batt_req.complete = 1;
 409         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 410                 can_sleep = 1;
 411 #endif
 412
 413         if (request_irq(vias->intrs[0].line, via_pmu_interrupt, 0, "VIA-PMU",
 414                         (void *)0)) {
 415                 printk(KERN_ERR "VIA-PMU: can't get irq %d\n",
 416                        vias->intrs[0].line);
 417                 return -EAGAIN;
 418         }
 419
 420         if (pmu_kind == PMU_KEYLARGO_BASED && gpio_irq != -1) {
 421                 if (request_irq(gpio_irq, gpio1_interrupt, 0, "GPIO1/ADB", (void *)0))
 422                         printk(KERN_ERR "pmu: can't get irq %d (GPIO1)\n", gpio_irq);
 423                 gpio_irq_enabled = 1;
 424         }
 425
 426         /* Enable interrupts */
 427         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
 428
 429         pmu_fully_inited = 1;
 430
 431         /* Make sure PMU settle down before continuing. This is _very_ important
 432          * since the IDE probe may shut interrupts down for quite a bit of time. If
 433          * a PMU communication is pending while this happens, the PMU may timeout
 434          * Not that on Core99 machines, the PMU keeps sending us environement
 435          * messages, we should find a way to either fix IDE or make it call
 436          * pmu_suspend() before masking interrupts. This can also happens while
 437          * scolling with some fbdevs.
 438          */
 439         do {
 440                 pmu_poll();
 441         } while (pmu_state != idle);
 442
 443         return 0;
 444 }
 445
 446 arch_initcall(via_pmu_start);
 447
 448 /*
 449  * This has to be done after pci_init, which is a subsys_initcall.
 450  */
 451 static int __init via_pmu_dev_init(void)
 452 {
 453         if (vias == NULL)
 454                 return -ENODEV;
 455
 456 #ifndef CONFIG_PPC64
 457         request_OF_resource(vias, 0, NULL);
 458 #endif
 459 #ifdef CONFIG_PMAC_BACKLIGHT
 460         /* Enable backlight */
 461         register_backlight_controller(&pmu_backlight_controller, NULL, "pmu");
 462 #endif /* CONFIG_PMAC_BACKLIGHT */
 463
 464 #ifdef CONFIG_PMAC_PBOOK
 465         if (machine_is_compatible("AAPL,3400/2400") ||
 466                 machine_is_compatible("AAPL,3500")) {
 467                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 468                         NULL, PMAC_MB_INFO_MODEL, 0);
 469                 pmu_battery_count = 1;
 470                 if (mb == PMAC_TYPE_COMET)
 471                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 472                 else
 473                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 474         } else if (machine_is_compatible("AAPL,PowerBook1998") ||
 475                 machine_is_compatible("PowerBook1,1")) {
 476                 pmu_battery_count = 2;
 477                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 478                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 479         } else {
 480                 struct device_node* prim = find_devices("power-mgt");
 481                 u32 *prim_info = NULL;
 482                 if (prim)
 483                         prim_info = (u32 *)get_property(prim, "prim-info", NULL);
 484                 if (prim_info) {
 485                         /* Other stuffs here yet unknown */
 486                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 487                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 488                         if (pmu_battery_count > 1)
 489                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 490                 }
 491         }
 492 #endif /* CONFIG_PMAC_PBOOK */
 493         /* Create /proc/pmu */
 494         proc_pmu_root = proc_mkdir("pmu", NULL);
 495         if (proc_pmu_root) {
 496 #ifdef CONFIG_PMAC_PBOOK
 497                 int i;
 498
 499                 for (i=0; i<pmu_battery_count; i++) {
 500                         char title[16];
 501                         sprintf(title, "battery_%d", i);
 502                         proc_pmu_batt[i] = create_proc_read_entry(title, 0, proc_pmu_root,
 503                                                 proc_get_batt, (void *)i);
 504                 }
 505 #endif /* CONFIG_PMAC_PBOOK */
 506
 507                 proc_pmu_info = create_proc_read_entry("info", 0, proc_pmu_root,
 508                                         proc_get_info, NULL);
 509                 proc_pmu_irqstats = create_proc_read_entry("interrupts", 0, proc_pmu_root,
 510                                         proc_get_irqstats, NULL);
 511                 proc_pmu_options = create_proc_entry("options", 0600, proc_pmu_root);
 512                 if (proc_pmu_options) {
 513                         proc_pmu_options->nlink = 1;
 514                         proc_pmu_options->read_proc = proc_read_options;
 515                         proc_pmu_options->write_proc = proc_write_options;
 516                 }
 517         }
 518         return 0;
 519 }
 520
 521 device_initcall(via_pmu_dev_init);
 522
 523 static int __openfirmware
 524 init_pmu(void)
 525 {
 526         int timeout;
 527         struct adb_request req;
 528
 529         out_8(&via[B], via[B] | TREQ);                  /* negate TREQ */
 530         out_8(&via[DIRB], (via[DIRB] | TREQ) & ~TACK);  /* TACK in, TREQ out */
 531
 532         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 533         timeout =  100000;
 534         while (!req.complete) {
 535                 if (--timeout < 0) {
 536                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 537                         return 0;
 538                 }
 539                 udelay(10);
 540                 pmu_poll();
 541         }
 542
 543         /* ack all pending interrupts */
 544         timeout = 100000;
 545         interrupt_data[0][0] = 1;
 546         while (interrupt_data[0][0] || pmu_state != idle) {
 547                 if (--timeout < 0) {
 548                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 549                         return 0;
 550                 }
 551                 if (pmu_state == idle)
 552                         adb_int_pending = 1;
 553                 via_pmu_interrupt(0, NULL, NULL);
 554                 udelay(10);
 555         }
 556
 557         /* Tell PMU we are ready.  */
 558         if (pmu_kind == PMU_KEYLARGO_BASED) {
 559                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 560                 while (!req.complete)
 561                         pmu_poll();
 562         }
 563
 564         /* Read PMU version */
 565         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 566         pmu_wait_complete(&req);
 567         if (req.reply_len > 0)
 568                 pmu_version = req.reply[0];
 569
 570         /* Read server mode setting */
 571         if (pmu_kind == PMU_KEYLARGO_BASED) {
 572                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 573                             PMU_PWR_GET_POWERUP_EVENTS);
 574                 pmu_wait_complete(&req);
 575                 if (req.reply_len == 2) {
 576                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 577                                 option_server_mode = 1;
 578                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 579                                option_server_mode ? "enabled" : "disabled");
 580                 }
 581         }
 582         return 1;
 583 }
 584
 585 int
 586 pmu_get_model(void)
 587 {
 588         return pmu_kind;
 589 }
 590
 591 #ifndef CONFIG_PPC64
 592 static inline void wakeup_decrementer(void)
 593 {
 594         set_dec(tb_ticks_per_jiffy);
 595         /* No currently-supported powerbook has a 601,
 596          * so use get_tbl, not native
 597          */
 598         last_jiffy_stamp(0) = tb_last_stamp = get_tbl();
 599 }
 600 #endif
 601
 602 static void pmu_set_server_mode(int server_mode)
 603 {
 604         struct adb_request req;
 605
 606         if (pmu_kind != PMU_KEYLARGO_BASED)
 607                 return;
 608
 609         option_server_mode = server_mode;
 610         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 611         pmu_wait_complete(&req);
 612         if (req.reply_len < 2)
 613                 return;
 614         if (server_mode)
 615                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 616                             PMU_PWR_SET_POWERUP_EVENTS,
 617                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 618         else
 619                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 620                             PMU_PWR_CLR_POWERUP_EVENTS,
 621                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 622         pmu_wait_complete(&req);
 623 }
 624
 625 #ifdef CONFIG_PMAC_PBOOK
 626
 627 /* This new version of the code for 2400/3400/3500 powerbooks
 628  * is inspired from the implementation in gkrellm-pmu
 629  */
 630 static void __pmac
 631 done_battery_state_ohare(struct adb_request* req)
 632 {
 633         /* format:
 634          *  [0]    :  flags
 635          *    0x01 :  AC indicator
 636          *    0x02 :  charging
 637          *    0x04 :  battery exist
 638          *    0x08 :
 639          *    0x10 :
 640          *    0x20 :  full charged
 641          *    0x40 :  pcharge reset
 642          *    0x80 :  battery exist
 643          *
 644          *  [1][2] :  battery voltage
 645          *  [3]    :  CPU temperature
 646          *  [4]    :  battery temperature
 647          *  [5]    :  current
 648          *  [6][7] :  pcharge
 649          *              --tkoba
 650          */
 651         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 652         long pcharge, charge, vb, vmax, lmax;
 653         long vmax_charging, vmax_charged;
 654         long amperage, voltage, time, max;
 655         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 656                         NULL, PMAC_MB_INFO_MODEL, 0);
 657
 658         if (req->reply[0] & 0x01)
 659                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 660         else
 661                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 662
 663         if (mb == PMAC_TYPE_COMET) {
 664                 vmax_charged = 189;
 665                 vmax_charging = 213;
 666                 lmax = 6500;
 667         } else {
 668                 vmax_charged = 330;
 669                 vmax_charging = 330;
 670                 lmax = 6500;
 671         }
 672         vmax = vmax_charged;
 673
 674         /* If battery installed */
 675         if (req->reply[0] & 0x04) {
 676                 bat_flags |= PMU_BATT_PRESENT;
 677                 if (req->reply[0] & 0x02)
 678                         bat_flags |= PMU_BATT_CHARGING;
 679                 vb = (req->reply[1] << 8) | req->reply[2];
 680                 voltage = (vb * 265 + 72665) / 10;
 681                 amperage = req->reply[5];
 682                 if ((req->reply[0] & 0x01) == 0) {
 683                         if (amperage > 200)
 684                                 vb += ((amperage - 200) * 15)/100;
 685                 } else if (req->reply[0] & 0x02) {
 686                         vb = (vb * 97) / 100;
 687                         vmax = vmax_charging;
 688                 }
 689                 charge = (100 * vb) / vmax;
 690                 if (req->reply[0] & 0x40) {
 691                         pcharge = (req->reply[6] << 8) + req->reply[7];
 692                         if (pcharge > lmax)
 693                                 pcharge = lmax;
 694                         pcharge *= 100;
 695                         pcharge = 100 - pcharge / lmax;
 696                         if (pcharge < charge)
 697                                 charge = pcharge;
 698                 }
 699                 if (amperage > 0)
 700                         time = (charge * 16440) / amperage;
 701                 else
 702                         time = 0;
 703                 max = 100;
 704                 amperage = -amperage;
 705         } else
 706                 charge = max = amperage = voltage = time = 0;
 707
 708         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 709         pmu_batteries[pmu_cur_battery].charge = charge;
 710         pmu_batteries[pmu_cur_battery].max_charge = max;
 711         pmu_batteries[pmu_cur_battery].amperage = amperage;
 712         pmu_batteries[pmu_cur_battery].voltage = voltage;
 713         pmu_batteries[pmu_cur_battery].time_remaining = time;
 714
 715         clear_bit(0, &async_req_locks);
 716 }
 717
 718 static void __pmac
 719 done_battery_state_smart(struct adb_request* req)
 720 {
 721         /* format:
 722          *  [0] : format of this structure (known: 3,4,5)
 723          *  [1] : flags
 724          *
 725          *  format 3 & 4:
 726          *
 727          *  [2] : charge
 728          *  [3] : max charge
 729          *  [4] : current
 730          *  [5] : voltage
 731          *
 732          *  format 5:
 733          *
 734          *  [2][3] : charge
 735          *  [4][5] : max charge
 736          *  [6][7] : current
 737          *  [8][9] : voltage
 738          */
 739
 740         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 741         int amperage;
 742         unsigned int capa, max, voltage;
 743
 744         if (req->reply[1] & 0x01)
 745                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 746         else
 747                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 748
 749
 750         capa = max = amperage = voltage = 0;
 751
 752         if (req->reply[1] & 0x04) {
 753                 bat_flags |= PMU_BATT_PRESENT;
 754                 switch(req->reply[0]) {
 755                         case 3:
 756                         case 4: capa = req->reply[2];
 757                                 max = req->reply[3];
 758                                 amperage = *((signed char *)&req->reply[4]);
 759                                 voltage = req->reply[5];
 760                                 break;
 761                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 762                                 max = (req->reply[4] << 8) | req->reply[5];
 763                                 amperage = *((signed short *)&req->reply[6]);
 764                                 voltage = (req->reply[8] << 8) | req->reply[9];
 765                                 break;
 766                         default:
 767                                 printk(KERN_WARNING "pmu.c : unrecognized battery info, len: %d, %02x %02x %02x %02x\n",
 768                                         req->reply_len, req->reply[0], req->reply[1], req->reply[2], req->reply[3]);
 769                                 break;
 770                 }
 771         }
 772
 773         if ((req->reply[1] & 0x01) && (amperage > 0))
 774                 bat_flags |= PMU_BATT_CHARGING;
 775
 776         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 777         pmu_batteries[pmu_cur_battery].charge = capa;
 778         pmu_batteries[pmu_cur_battery].max_charge = max;
 779         pmu_batteries[pmu_cur_battery].amperage = amperage;
 780         pmu_batteries[pmu_cur_battery].voltage = voltage;
 781         if (amperage) {
 782                 if ((req->reply[1] & 0x01) && (amperage > 0))
 783                         pmu_batteries[pmu_cur_battery].time_remaining
 784                                 = ((max-capa) * 3600) / amperage;
 785                 else
 786                         pmu_batteries[pmu_cur_battery].time_remaining
 787                                 = (capa * 3600) / (-amperage);
 788         } else
 789                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 790
 791         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 792
 793         clear_bit(0, &async_req_locks);
 794 }
 795
 796 static void __pmac
 797 query_battery_state(void)
 798 {
 799         if (test_and_set_bit(0, &async_req_locks))
 800                 return;
 801         if (pmu_kind == PMU_OHARE_BASED)
 802                 pmu_request(&batt_req, done_battery_state_ohare,
 803                         1, PMU_BATTERY_STATE);
 804         else
 805                 pmu_request(&batt_req, done_battery_state_smart,
 806                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 807 }
 808
 809 #endif /* CONFIG_PMAC_PBOOK */
 810
 811 static int __pmac
 812 proc_get_info(char *page, char **start, off_t off,
 813                 int count, int *eof, void *data)
 814 {
 815         char* p = page;
 816
 817         p += sprintf(p, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 818         p += sprintf(p, "PMU firmware version   : %02x\n", pmu_version);
 819 #ifdef CONFIG_PMAC_PBOOK
 820         p += sprintf(p, "AC Power               : %d\n",
 821                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0));
 822         p += sprintf(p, "Battery count          : %d\n", pmu_battery_count);
 823 #endif /* CONFIG_PMAC_PBOOK */
 824
 825         return p - page;
 826 }
 827
 828 static int __pmac
 829 proc_get_irqstats(char *page, char **start, off_t off,
 830                   int count, int *eof, void *data)
 831 {
 832         int i;
 833         char* p = page;
 834         static const char *irq_names[] = {
 835                 "Total CB1 triggered events",
 836                 "Total GPIO1 triggered events",
 837                 "PC-Card eject button",
 838                 "Sound/Brightness button",
 839                 "ADB message",
 840                 "Battery state change",
 841                 "Environment interrupt",
 842                 "Tick timer",
 843                 "Ghost interrupt (zero len)",
 844                 "Empty interrupt (empty mask)",
 845                 "Max irqs in a row"
 846         };
 847
 848         for (i=0; i<11; i++) {
 849                 p += sprintf(p, " %2u: %10u (%s)\n",
 850                              i, pmu_irq_stats[i], irq_names[i]);
 851         }
 852         return p - page;
 853 }
 854
 855 #ifdef CONFIG_PMAC_PBOOK
 856 static int __pmac
 857 proc_get_batt(char *page, char **start, off_t off,
 858                 int count, int *eof, void *data)
 859 {
 860         int batnum = (int)data;
 861         char *p = page;
 862
 863         p += sprintf(p, "\n");
 864         p += sprintf(p, "flags      : %08x\n",
 865                 pmu_batteries[batnum].flags);
 866         p += sprintf(p, "charge     : %d\n",
 867                 pmu_batteries[batnum].charge);
 868         p += sprintf(p, "max_charge : %d\n",
 869                 pmu_batteries[batnum].max_charge);
 870         p += sprintf(p, "current    : %d\n",
 871                 pmu_batteries[batnum].amperage);
 872         p += sprintf(p, "voltage    : %d\n",
 873                 pmu_batteries[batnum].voltage);
 874         p += sprintf(p, "time rem.  : %d\n",
 875                 pmu_batteries[batnum].time_remaining);
 876
 877         return p - page;
 878 }
 879 #endif /* CONFIG_PMAC_PBOOK */
 880
 881 static int __pmac
 882 proc_read_options(char *page, char **start, off_t off,
 883                         int count, int *eof, void *data)
 884 {
 885         char *p = page;
 886
 887 #ifdef CONFIG_PMAC_PBOOK
 888         if (pmu_kind == PMU_KEYLARGO_BASED && can_sleep)
 889                 p += sprintf(p, "lid_wakeup=%d\n", option_lid_wakeup);
 890 #endif /* CONFIG_PMAC_PBOOK */
 891         if (pmu_kind == PMU_KEYLARGO_BASED)
 892                 p += sprintf(p, "server_mode=%d\n", option_server_mode);
 893
 894         return p - page;
 895 }
 896
 897 static int __pmac
 898 proc_write_options(struct file *file, const char __user *buffer,
 899                         unsigned long count, void *data)
 900 {
 901         char tmp[33];
 902         char *label, *val;
 903         unsigned long fcount = count;
 904
 905         if (!count)
 906                 return -EINVAL;
 907         if (count > 32)
 908                 count = 32;
 909         if (copy_from_user(tmp, buffer, count))
 910                 return -EFAULT;
 911         tmp[count] = 0;
 912
 913         label = tmp;
 914         while(*label == ' ')
 915                 label++;
 916         val = label;
 917         while(*val && (*val != '=')) {
 918                 if (*val == ' ')
 919                         *val = 0;
 920                 val++;
 921         }
 922         if ((*val) == 0)
 923                 return -EINVAL;
 924         *(val++) = 0;
 925         while(*val == ' ')
 926                 val++;
 927 #ifdef CONFIG_PMAC_PBOOK
 928         if (pmu_kind == PMU_KEYLARGO_BASED && can_sleep)
 929                 if (!strcmp(label, "lid_wakeup"))
 930                         option_lid_wakeup = ((*val) == '1');
 931 #endif /* CONFIG_PMAC_PBOOK */
 932         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 933                 int new_value;
 934                 new_value = ((*val) == '1');
 935                 if (new_value != option_server_mode)
 936                         pmu_set_server_mode(new_value);
 937         }
 938         return fcount;
 939 }
 940
 941 #ifdef CONFIG_ADB
 942 /* Send an ADB command */
 943 static int __pmac
 944 pmu_send_request(struct adb_request *req, int sync)
 945 {
 946         int i, ret;
 947
 948         if ((vias == NULL) || (!pmu_fully_inited)) {
 949                 req->complete = 1;
 950                 return -ENXIO;
 951         }
 952
 953         ret = -EINVAL;
 954
 955         switch (req->data[0]) {
 956         case PMU_PACKET:
 957                 for (i = 0; i < req->nbytes - 1; ++i)
 958                         req->data[i] = req->data[i+1];
 959                 --req->nbytes;
 960                 if (pmu_data_len[req->data[0]][1] != 0) {
 961                         req->reply[0] = ADB_RET_OK;
 962                         req->reply_len = 1;
 963                 } else
 964                         req->reply_len = 0;
 965                 ret = pmu_queue_request(req);
 966                 break;
 967         case CUDA_PACKET:
 968                 switch (req->data[1]) {
 969                 case CUDA_GET_TIME:
 970                         if (req->nbytes != 2)
 971                                 break;
 972                         req->data[0] = PMU_READ_RTC;
 973                         req->nbytes = 1;
 974                         req->reply_len = 3;
 975                         req->reply[0] = CUDA_PACKET;
 976                         req->reply[1] = 0;
 977                         req->reply[2] = CUDA_GET_TIME;
 978                         ret = pmu_queue_request(req);
 979                         break;
 980                 case CUDA_SET_TIME:
 981                         if (req->nbytes != 6)
 982                                 break;
 983                         req->data[0] = PMU_SET_RTC;
 984                         req->nbytes = 5;
 985                         for (i = 1; i <= 4; ++i)
 986                                 req->data[i] = req->data[i+1];
 987                         req->reply_len = 3;
 988                         req->reply[0] = CUDA_PACKET;
 989                         req->reply[1] = 0;
 990                         req->reply[2] = CUDA_SET_TIME;
 991                         ret = pmu_queue_request(req);
 992                         break;
 993                 }
 994                 break;
 995         case ADB_PACKET:
 996                 if (!pmu_has_adb)
 997                         return -ENXIO;
 998                 for (i = req->nbytes - 1; i > 1; --i)
 999                         req->data[i+2] = req->data[i];
1000                 req->data[3] = req->nbytes - 2;
1001                 req->data[2] = pmu_adb_flags;
1002                 /*req->data[1] = req->data[1];*/
1003                 req->data[0] = PMU_ADB_CMD;
1004                 req->nbytes += 2;
1005                 req->reply_expected = 1;
1006                 req->reply_len = 0;
1007                 ret = pmu_queue_request(req);
1008                 break;
1009         }
1010         if (ret) {
1011                 req->complete = 1;
1012                 return ret;
1013         }
1014
1015         if (sync)
1016                 while (!req->complete)
1017                         pmu_poll();
1018
1019         return 0;
1020 }
1021
1022 /* Enable/disable autopolling */
1023 static int __pmac
1024 pmu_adb_autopoll(int devs)
1025 {
1026         struct adb_request req;
1027
1028         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1029                 return -ENXIO;
1030
1031         if (devs) {
1032                 adb_dev_map = devs;
1033                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1034                             adb_dev_map >> 8, adb_dev_map);
1035                 pmu_adb_flags = 2;
1036         } else {
1037                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1038                 pmu_adb_flags = 0;
1039         }
1040         while (!req.complete)
1041                 pmu_poll();
1042         return 0;
1043 }
1044
1045 /* Reset the ADB bus */
1046 static int __pmac
1047 pmu_adb_reset_bus(void)
1048 {
1049         struct adb_request req;
1050         int save_autopoll = adb_dev_map;
1051
1052         if ((vias == NULL) || (!pmu_fully_inited) || !pmu_has_adb)
1053                 return -ENXIO;
1054
1055         /* anyone got a better idea?? */
1056         pmu_adb_autopoll(0);
1057
1058         req.nbytes = 5;
1059         req.done = NULL;
1060         req.data[0] = PMU_ADB_CMD;
1061         req.data[1] = 0;
1062         req.data[2] = ADB_BUSRESET;
1063         req.data[3] = 0;
1064         req.data[4] = 0;
1065         req.reply_len = 0;
1066         req.reply_expected = 1;
1067         if (pmu_queue_request(&req) != 0) {
1068                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1069                 return -EIO;
1070         }
1071         pmu_wait_complete(&req);
1072
1073         if (save_autopoll != 0)
1074                 pmu_adb_autopoll(save_autopoll);
1075
1076         return 0;
1077 }
1078 #endif /* CONFIG_ADB */
1079
1080 /* Construct and send a pmu request */
1081 int __openfirmware
1082 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1083             int nbytes, ...)
1084 {
1085         va_list list;
1086         int i;
1087
1088         if (vias == NULL)
1089                 return -ENXIO;
1090
1091         if (nbytes < 0 || nbytes > 32) {
1092                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1093                 req->complete = 1;
1094                 return -EINVAL;
1095         }
1096         req->nbytes = nbytes;
1097         req->done = done;
1098         va_start(list, nbytes);
1099         for (i = 0; i < nbytes; ++i)
1100                 req->data[i] = va_arg(list, int);
1101         va_end(list);
1102         req->reply_len = 0;
1103         req->reply_expected = 0;
1104         return pmu_queue_request(req);
1105 }
1106
1107 int __pmac
1108 pmu_queue_request(struct adb_request *req)
1109 {
1110         unsigned long flags;
1111         int nsend;
1112
1113         if (via == NULL) {
1114                 req->complete = 1;
1115                 return -ENXIO;
1116         }
1117         if (req->nbytes <= 0) {
1118                 req->complete = 1;
1119                 return 0;
1120         }
1121         nsend = pmu_data_len[req->data[0]][0];
1122         if (nsend >= 0 && req->nbytes != nsend + 1) {
1123                 req->complete = 1;
1124                 return -EINVAL;
1125         }
1126
1127         req->next = NULL;
1128         req->sent = 0;
1129         req->complete = 0;
1130
1131         spin_lock_irqsave(&pmu_lock, flags);
1132         if (current_req != 0) {
1133                 last_req->next = req;
1134                 last_req = req;
1135         } else {
1136                 current_req = req;
1137                 last_req = req;
1138                 if (pmu_state == idle)
1139                         pmu_start();
1140         }
1141         spin_unlock_irqrestore(&pmu_lock, flags);
1142
1143         return 0;
1144 }
1145
1146 static inline void
1147 wait_for_ack(void)
1148 {
1149         /* Sightly increased the delay, I had one occurrence of the message
1150          * reported
1151          */
1152         int timeout = 4000;
1153         while ((in_8(&via[B]) & TACK) == 0) {
1154                 if (--timeout < 0) {
1155                         printk(KERN_ERR "PMU not responding (!ack)\n");
1156                         return;
1157                 }
1158                 udelay(10);
1159         }
1160 }
1161
1162 /* New PMU seems to be very sensitive to those timings, so we make sure
1163  * PCI is flushed immediately */
1164 static inline void
1165 send_byte(int x)
1166 {
1167         volatile unsigned char *v = via;
1168
1169         out_8(&v[ACR], in_8(&v[ACR]) | SR_OUT | SR_EXT);
1170         out_8(&v[SR], x);
1171         out_8(&v[B], in_8(&v[B]) & ~TREQ);              /* assert TREQ */
1172         (void)in_8(&v[B]);
1173 }
1174
1175 static inline void
1176 recv_byte(void)
1177 {
1178         volatile unsigned char *v = via;
1179
1180         out_8(&v[ACR], (in_8(&v[ACR]) & ~SR_OUT) | SR_EXT);
1181         in_8(&v[SR]);           /* resets SR */
1182         out_8(&v[B], in_8(&v[B]) & ~TREQ);
1183         (void)in_8(&v[B]);
1184 }
1185
1186 static inline void
1187 pmu_done(struct adb_request *req)
1188 {
1189         void (*done)(struct adb_request *) = req->done;
1190         mb();
1191         req->complete = 1;
1192         /* Here, we assume that if the request has a done member, the
1193          * struct request will survive to setting req->complete to 1
1194          */
1195         if (done)
1196                 (*done)(req);
1197 }
1198
1199 static void __pmac
1200 pmu_start(void)
1201 {
1202         struct adb_request *req;
1203
1204         /* assert pmu_state == idle */
1205         /* get the packet to send */
1206         req = current_req;
1207         if (req == 0 || pmu_state != idle
1208             || (/*req->reply_expected && */req_awaiting_reply))
1209                 return;
1210
1211         pmu_state = sending;
1212         data_index = 1;
1213         data_len = pmu_data_len[req->data[0]][0];
1214
1215         /* Sounds safer to make sure ACK is high before writing. This helped
1216          * kill a problem with ADB and some iBooks
1217          */
1218         wait_for_ack();
1219         /* set the shift register to shift out and send a byte */
1220         send_byte(req->data[0]);
1221 }
1222
1223 void __openfirmware
1224 pmu_poll(void)
1225 {
1226         if (!via)
1227                 return;
1228         if (disable_poll)
1229                 return;
1230         via_pmu_interrupt(0, NULL, NULL);
1231 }
1232
1233 void __openfirmware
1234 pmu_poll_adb(void)
1235 {
1236         if (!via)
1237                 return;
1238         if (disable_poll)
1239                 return;
1240         /* Kicks ADB read when PMU is suspended */
1241         adb_int_pending = 1;
1242         do {
1243                 via_pmu_interrupt(0, NULL, NULL);
1244         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1245                 || req_awaiting_reply));
1246 }
1247
1248 void __openfirmware
1249 pmu_wait_complete(struct adb_request *req)
1250 {
1251         if (!via)
1252                 return;
1253         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1254                 via_pmu_interrupt(0, NULL, NULL);
1255 }
1256
1257 /* This function loops until the PMU is idle and prevents it from
1258  * anwsering to ADB interrupts. pmu_request can still be called.
1259  * This is done to avoid spurrious shutdowns when we know we'll have
1260  * interrupts switched off for a long time
1261  */
1262 void __openfirmware
1263 pmu_suspend(void)
1264 {
1265         unsigned long flags;
1266 #ifdef SUSPEND_USES_PMU
1267         struct adb_request *req;
1268 #endif
1269         if (!via)
1270                 return;
1271
1272         spin_lock_irqsave(&pmu_lock, flags);
1273         pmu_suspended++;
1274         if (pmu_suspended > 1) {
1275                 spin_unlock_irqrestore(&pmu_lock, flags);
1276                 return;
1277         }
1278
1279         do {
1280                 spin_unlock_irqrestore(&pmu_lock, flags);
1281                 if (req_awaiting_reply)
1282                         adb_int_pending = 1;
1283                 via_pmu_interrupt(0, NULL, NULL);
1284                 spin_lock_irqsave(&pmu_lock, flags);
1285                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1286 #ifdef SUSPEND_USES_PMU
1287                         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1288                         spin_unlock_irqrestore(&pmu_lock, flags);
1289                         while(!req.complete)
1290                                 pmu_poll();
1291 #else /* SUSPEND_USES_PMU */
1292                         if (gpio_irq >= 0)
1293                                 disable_irq_nosync(gpio_irq);
1294                         out_8(&via[IER], CB1_INT | IER_CLR);
1295                         spin_unlock_irqrestore(&pmu_lock, flags);
1296 #endif /* SUSPEND_USES_PMU */
1297                         break;
1298                 }
1299         } while (1);
1300 }
1301
1302 void __openfirmware
1303 pmu_resume(void)
1304 {
1305         unsigned long flags;
1306
1307         if (!via || (pmu_suspended < 1))
1308                 return;
1309
1310         spin_lock_irqsave(&pmu_lock, flags);
1311         pmu_suspended--;
1312         if (pmu_suspended > 0) {
1313                 spin_unlock_irqrestore(&pmu_lock, flags);
1314                 return;
1315         }
1316         adb_int_pending = 1;
1317 #ifdef SUSPEND_USES_PMU
1318         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1319         spin_unlock_irqrestore(&pmu_lock, flags);
1320         while(!req.complete)
1321                 pmu_poll();
1322 #else /* SUSPEND_USES_PMU */
1323         if (gpio_irq >= 0)
1324                 enable_irq(gpio_irq);
1325         out_8(&via[IER], CB1_INT | IER_SET);
1326         spin_unlock_irqrestore(&pmu_lock, flags);
1327         pmu_poll();
1328 #endif /* SUSPEND_USES_PMU */
1329 }
1330
1331 /* Interrupt data could be the result data from an ADB cmd */
1332 static void __pmac
1333 pmu_handle_data(unsigned char *data, int len, struct pt_regs *regs)
1334 {
1335         unsigned char ints, pirq;
1336         int i = 0;
1337
1338         asleep = 0;
1339         if (drop_interrupts || len < 1) {
1340                 adb_int_pending = 0;
1341                 pmu_irq_stats[8]++;
1342                 return;
1343         }
1344
1345         /* Get PMU interrupt mask */
1346         ints = data[0];
1347
1348         /* Record zero interrupts for stats */
1349         if (ints == 0)
1350                 pmu_irq_stats[9]++;
1351
1352         /* Hack to deal with ADB autopoll flag */
1353         if (ints & PMU_INT_ADB)
1354                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1355
1356 next:
1357
1358         if (ints == 0) {
1359                 if (i > pmu_irq_stats[10])
1360                         pmu_irq_stats[10] = i;
1361                 return;
1362         }
1363
1364         for (pirq = 0; pirq < 8; pirq++)
1365                 if (ints & (1 << pirq))
1366                         break;
1367         pmu_irq_stats[pirq]++;
1368         i++;
1369         ints &= ~(1 << pirq);
1370
1371         /* Note: for some reason, we get an interrupt with len=1,
1372          * data[0]==0 after each normal ADB interrupt, at least
1373          * on the Pismo. Still investigating...  --BenH
1374          */
1375         if ((1 << pirq) & PMU_INT_ADB) {
1376                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1377                         struct adb_request *req = req_awaiting_reply;
1378                         if (req == 0) {
1379                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1380                                 return;
1381                         }
1382                         req_awaiting_reply = NULL;
1383                         if (len <= 2)
1384                                 req->reply_len = 0;
1385                         else {
1386                                 memcpy(req->reply, data + 1, len - 1);
1387                                 req->reply_len = len - 1;
1388                         }
1389                         pmu_done(req);
1390                 } else {
1391 #if defined(CONFIG_XMON) && !defined(CONFIG_PPC64)
1392                         if (len == 4 && data[1] == 0x2c) {
1393                                 extern int xmon_wants_key, xmon_adb_keycode;
1394                                 if (xmon_wants_key) {
1395                                         xmon_adb_keycode = data[2];
1396                                         return;
1397                                 }
1398                         }
1399 #endif /* defined(CONFIG_XMON) && !defined(CONFIG_PPC64) */
1400 #ifdef CONFIG_ADB
1401                         /*
1402                          * XXX On the [23]400 the PMU gives us an up
1403                          * event for keycodes 0x74 or 0x75 when the PC
1404                          * card eject buttons are released, so we
1405                          * ignore those events.
1406                          */
1407                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1408                               && data[1] == 0x2c && data[3] == 0xff
1409                               && (data[2] & ~1) == 0xf4))
1410                                 adb_input(data+1, len-1, regs, 1);
1411 #endif /* CONFIG_ADB */
1412                 }
1413         }
1414         /* Sound/brightness button pressed */
1415         else if ((1 << pirq) & PMU_INT_SNDBRT) {
1416 #ifdef CONFIG_PMAC_BACKLIGHT
1417                 if (len == 3)
1418 #ifdef CONFIG_INPUT_ADBHID
1419                         if (!disable_kernel_backlight)
1420 #endif /* CONFIG_INPUT_ADBHID */
1421                                 set_backlight_level(data[1] >> 4);
1422 #endif /* CONFIG_PMAC_BACKLIGHT */
1423         }
1424         /* Tick interrupt */
1425         else if ((1 << pirq) & PMU_INT_TICK) {
1426 #ifdef CONFIG_PMAC_PBOOK
1427                 /* Environement or tick interrupt, query batteries */
1428                 if (pmu_battery_count) {
1429                         if ((--query_batt_timer) == 0) {
1430                                 query_battery_state();
1431                                 query_batt_timer = BATTERY_POLLING_COUNT;
1432                         }
1433                 }
1434         }
1435         else if ((1 << pirq) & PMU_INT_ENVIRONMENT) {
1436                 if (pmu_battery_count)
1437                         query_battery_state();
1438                 pmu_pass_intr(data, len);
1439         } else {
1440                pmu_pass_intr(data, len);
1441 #endif /* CONFIG_PMAC_PBOOK */
1442         }
1443         goto next;
1444 }
1445
1446 static struct adb_request* __pmac
1447 pmu_sr_intr(struct pt_regs *regs)
1448 {
1449         struct adb_request *req;
1450         int bite = 0;
1451
1452         if (via[B] & TREQ) {
1453                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", via[B]);
1454                 out_8(&via[IFR], SR_INT);
1455                 return NULL;
1456         }
1457         /* The ack may not yet be low when we get the interrupt */
1458         while ((in_8(&via[B]) & TACK) != 0)
1459                         ;
1460
1461         /* if reading grab the byte, and reset the interrupt */
1462         if (pmu_state == reading || pmu_state == reading_intr)
1463                 bite = in_8(&via[SR]);
1464
1465         /* reset TREQ and wait for TACK to go high */
1466         out_8(&via[B], in_8(&via[B]) | TREQ);
1467         wait_for_ack();
1468
1469         switch (pmu_state) {
1470         case sending:
1471                 req = current_req;
1472                 if (data_len < 0) {
1473                         data_len = req->nbytes - 1;
1474                         send_byte(data_len);
1475                         break;
1476                 }
1477                 if (data_index <= data_len) {
1478                         send_byte(req->data[data_index++]);
1479                         break;
1480                 }
1481                 req->sent = 1;
1482                 data_len = pmu_data_len[req->data[0]][1];
1483                 if (data_len == 0) {
1484                         pmu_state = idle;
1485                         current_req = req->next;
1486                         if (req->reply_expected)
1487                                 req_awaiting_reply = req;
1488                         else
1489                                 return req;
1490                 } else {
1491                         pmu_state = reading;
1492                         data_index = 0;
1493                         reply_ptr = req->reply + req->reply_len;
1494                         recv_byte();
1495                 }
1496                 break;
1497
1498         case intack:
1499                 data_index = 0;
1500                 data_len = -1;
1501                 pmu_state = reading_intr;
1502                 reply_ptr = interrupt_data[int_data_last];
1503                 recv_byte();
1504                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1505                         enable_irq(gpio_irq);
1506                         gpio_irq_enabled = 1;
1507                 }
1508                 break;
1509
1510         case reading:
1511         case reading_intr:
1512                 if (data_len == -1) {
1513                         data_len = bite;
1514                         if (bite > 32)
1515                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1516                 } else if (data_index < 32) {
1517                         reply_ptr[data_index++] = bite;
1518                 }
1519                 if (data_index < data_len) {
1520                         recv_byte();
1521                         break;
1522                 }
1523
1524                 if (pmu_state == reading_intr) {
1525                         pmu_state = idle;
1526                         int_data_state[int_data_last] = int_data_ready;
1527                         interrupt_data_len[int_data_last] = data_len;
1528                 } else {
1529                         req = current_req;
1530                         /*
1531                          * For PMU sleep and freq change requests, we lock the
1532                          * PMU until it's explicitely unlocked. This avoids any
1533                          * spurrious event polling getting in
1534                          */
1535                         current_req = req->next;
1536                         req->reply_len += data_index;
1537                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1538                                 pmu_state = locked;
1539                         else
1540                                 pmu_state = idle;
1541                         return req;
1542                 }
1543                 break;
1544
1545         default:
1546                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1547                        pmu_state);
1548         }
1549         return NULL;
1550 }
1551
1552 static irqreturn_t __pmac
1553 via_pmu_interrupt(int irq, void *arg, struct pt_regs *regs)
1554 {
1555         unsigned long flags;
1556         int intr;
1557         int nloop = 0;
1558         int int_data = -1;
1559         struct adb_request *req = NULL;
1560         int handled = 0;
1561
1562         /* This is a bit brutal, we can probably do better */
1563         spin_lock_irqsave(&pmu_lock, flags);
1564         ++disable_poll;
1565
1566         for (;;) {
1567                 intr = in_8(&via[IFR]) & (SR_INT | CB1_INT);
1568                 if (intr == 0)
1569                         break;
1570                 handled = 1;
1571                 if (++nloop > 1000) {
1572                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1573                                "intr=%x, ier=%x pmu_state=%d\n",
1574                                intr, in_8(&via[IER]), pmu_state);
1575                         break;
1576                 }
1577                 out_8(&via[IFR], intr);
1578                 if (intr & CB1_INT) {
1579                         adb_int_pending = 1;
1580                         pmu_irq_stats[0]++;
1581                 }
1582                 if (intr & SR_INT) {
1583                         req = pmu_sr_intr(regs);
1584                         if (req)
1585                                 break;
1586                 }
1587         }
1588
1589 recheck:
1590         if (pmu_state == idle) {
1591                 if (adb_int_pending) {
1592                         if (int_data_state[0] == int_data_empty)
1593                                 int_data_last = 0;
1594                         else if (int_data_state[1] == int_data_empty)
1595                                 int_data_last = 1;
1596                         else
1597                                 goto no_free_slot;
1598                         pmu_state = intack;
1599                         int_data_state[int_data_last] = int_data_fill;
1600                         /* Sounds safer to make sure ACK is high before writing.
1601                          * This helped kill a problem with ADB and some iBooks
1602                          */
1603                         wait_for_ack();
1604                         send_byte(PMU_INT_ACK);
1605                         adb_int_pending = 0;
1606                 } else if (current_req)
1607                         pmu_start();
1608         }
1609 no_free_slot:
1610         /* Mark the oldest buffer for flushing */
1611         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         } else if (int_data_state[int_data_last] == int_data_ready) {
1615                 int_data_state[int_data_last] = int_data_flush;
1616                 int_data = int_data_last;
1617         }
1618         --disable_poll;
1619         spin_unlock_irqrestore(&pmu_lock, flags);
1620
1621         /* Deal with completed PMU requests outside of the lock */
1622         if (req) {
1623                 pmu_done(req);
1624                 req = NULL;
1625         }
1626
1627         /* Deal with interrupt datas outside of the lock */
1628         if (int_data >= 0) {
1629                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data], regs);
1630                 spin_lock_irqsave(&pmu_lock, flags);
1631                 ++disable_poll;
1632                 int_data_state[int_data] = int_data_empty;
1633                 int_data = -1;
1634                 goto recheck;
1635         }
1636
1637         return IRQ_RETVAL(handled);
1638 }
1639
1640 void __pmac
1641 pmu_unlock(void)
1642 {
1643         unsigned long flags;
1644
1645         spin_lock_irqsave(&pmu_lock, flags);
1646         if (pmu_state == locked)
1647                 pmu_state = idle;
1648         adb_int_pending = 1;
1649         spin_unlock_irqrestore(&pmu_lock, flags);
1650 }
1651
1652
1653 static irqreturn_t __pmac
1654 gpio1_interrupt(int irq, void *arg, struct pt_regs *regs)
1655 {
1656         unsigned long flags;
1657
1658         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1659                 spin_lock_irqsave(&pmu_lock, flags);
1660                 if (gpio_irq_enabled > 0) {
1661                         disable_irq_nosync(gpio_irq);
1662                         gpio_irq_enabled = 0;
1663                 }
1664                 pmu_irq_stats[1]++;
1665                 adb_int_pending = 1;
1666                 spin_unlock_irqrestore(&pmu_lock, flags);
1667                 via_pmu_interrupt(0, NULL, NULL);
1668                 return IRQ_HANDLED;
1669         }
1670         return IRQ_NONE;
1671 }
1672
1673 #ifdef CONFIG_PMAC_BACKLIGHT
1674 static int backlight_to_bright[] __pmacdata = {
1675         0x7f, 0x46, 0x42, 0x3e, 0x3a, 0x36, 0x32, 0x2e,
1676         0x2a, 0x26, 0x22, 0x1e, 0x1a, 0x16, 0x12, 0x0e
1677 };
1678
1679 static int __openfirmware
1680 pmu_set_backlight_enable(int on, int level, void* data)
1681 {
1682         struct adb_request req;
1683
1684         if (vias == NULL)
1685                 return -ENODEV;
1686
1687         if (on) {
1688                 pmu_request(&req, NULL, 2, PMU_BACKLIGHT_BRIGHT,
1689                             backlight_to_bright[level]);
1690                 pmu_wait_complete(&req);
1691         }
1692         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1693                     PMU_POW_BACKLIGHT | (on ? PMU_POW_ON : PMU_POW_OFF));
1694         pmu_wait_complete(&req);
1695
1696         return 0;
1697 }
1698
1699 static void __openfirmware
1700 pmu_bright_complete(struct adb_request *req)
1701 {
1702         if (req == &bright_req_1)
1703                 clear_bit(1, &async_req_locks);
1704         if (req == &bright_req_2)
1705                 clear_bit(2, &async_req_locks);
1706 }
1707
1708 static int __openfirmware
1709 pmu_set_backlight_level(int level, void* data)
1710 {
1711         if (vias == NULL)
1712                 return -ENODEV;
1713
1714         if (test_and_set_bit(1, &async_req_locks))
1715                 return -EAGAIN;
1716         pmu_request(&bright_req_1, pmu_bright_complete, 2, PMU_BACKLIGHT_BRIGHT,
1717                 backlight_to_bright[level]);
1718         if (test_and_set_bit(2, &async_req_locks))
1719                 return -EAGAIN;
1720         pmu_request(&bright_req_2, pmu_bright_complete, 2, PMU_POWER_CTRL,
1721                     PMU_POW_BACKLIGHT | (level > BACKLIGHT_OFF ?
1722                                          PMU_POW_ON : PMU_POW_OFF));
1723
1724         return 0;
1725 }
1726 #endif /* CONFIG_PMAC_BACKLIGHT */
1727
1728 void __pmac
1729 pmu_enable_irled(int on)
1730 {
1731         struct adb_request req;
1732
1733         if (vias == NULL)
1734                 return ;
1735         if (pmu_kind == PMU_KEYLARGO_BASED)
1736                 return ;
1737
1738         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1739             (on ? PMU_POW_ON : PMU_POW_OFF));
1740         pmu_wait_complete(&req);
1741 }
1742
1743 void __pmac
1744 pmu_restart(void)
1745 {
1746         struct adb_request req;
1747
1748         local_irq_disable();
1749
1750         drop_interrupts = 1;
1751
1752         if (pmu_kind != PMU_KEYLARGO_BASED) {
1753                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1754                                                 PMU_INT_TICK );
1755                 while(!req.complete)
1756                         pmu_poll();
1757         }
1758
1759         pmu_request(&req, NULL, 1, PMU_RESET);
1760         pmu_wait_complete(&req);
1761         for (;;)
1762                 ;
1763 }
1764
1765 void __pmac
1766 pmu_shutdown(void)
1767 {
1768         struct adb_request req;
1769
1770         local_irq_disable();
1771
1772         drop_interrupts = 1;
1773
1774         if (pmu_kind != PMU_KEYLARGO_BASED) {
1775                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1776                                                 PMU_INT_TICK );
1777                 pmu_wait_complete(&req);
1778         } else {
1779                 /* Disable server mode on shutdown or we'll just
1780                  * wake up again
1781                  */
1782                 pmu_set_server_mode(0);
1783         }
1784
1785         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1786                     'M', 'A', 'T', 'T');
1787         pmu_wait_complete(&req);
1788         for (;;)
1789                 ;
1790 }
1791
1792 int
1793 pmu_present(void)
1794 {
1795         return via != 0;
1796 }
1797
1798 struct pmu_i2c_hdr {
1799         u8      bus;
1800         u8      mode;
1801         u8      bus2;
1802         u8      address;
1803         u8      sub_addr;
1804         u8      comb_addr;
1805         u8      count;
1806 };
1807
1808 int
1809 pmu_i2c_combined_read(int bus, int addr, int subaddr,  u8* data, int len)
1810 {
1811         struct adb_request      req;
1812         struct pmu_i2c_hdr      *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1813         int retry;
1814         int rc;
1815
1816         for (retry=0; retry<16; retry++) {
1817                 memset(&req, 0, sizeof(req));
1818
1819                 hdr->bus = bus;
1820                 hdr->address = addr & 0xfe;
1821                 hdr->mode = PMU_I2C_MODE_COMBINED;
1822                 hdr->bus2 = 0;
1823                 hdr->sub_addr = subaddr;
1824                 hdr->comb_addr = addr | 1;
1825                 hdr->count = len;
1826
1827                 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1828                 req.reply_expected = 0;
1829                 req.reply_len = 0;
1830                 req.data[0] = PMU_I2C_CMD;
1831                 req.reply[0] = 0xff;
1832                 rc = pmu_queue_request(&req);
1833                 if (rc)
1834                         return rc;
1835                 while(!req.complete)
1836                         pmu_poll();
1837                 if (req.reply[0] == PMU_I2C_STATUS_OK)
1838                         break;
1839                 mdelay(15);
1840         }
1841         if (req.reply[0] != PMU_I2C_STATUS_OK)
1842                 return -1;
1843
1844         for (retry=0; retry<16; retry++) {
1845                 memset(&req, 0, sizeof(req));
1846
1847                 mdelay(15);
1848
1849                 hdr->bus = PMU_I2C_BUS_STATUS;
1850                 req.reply[0] = 0xff;
1851
1852                 req.nbytes = 2;
1853                 req.reply_expected = 0;
1854                 req.reply_len = 0;
1855                 req.data[0] = PMU_I2C_CMD;
1856                 rc = pmu_queue_request(&req);
1857                 if (rc)
1858                         return rc;
1859                 while(!req.complete)
1860                         pmu_poll();
1861                 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1862                         memcpy(data, &req.reply[1], req.reply_len - 1);
1863                         return req.reply_len - 1;
1864                 }
1865         }
1866         return -1;
1867 }
1868
1869 int
1870 pmu_i2c_stdsub_write(int bus, int addr, int subaddr,  u8* data, int len)
1871 {
1872         struct adb_request      req;
1873         struct pmu_i2c_hdr      *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1874         int retry;
1875         int rc;
1876
1877         for (retry=0; retry<16; retry++) {
1878                 memset(&req, 0, sizeof(req));
1879
1880                 hdr->bus = bus;
1881                 hdr->address = addr & 0xfe;
1882                 hdr->mode = PMU_I2C_MODE_STDSUB;
1883                 hdr->bus2 = 0;
1884                 hdr->sub_addr = subaddr;
1885                 hdr->comb_addr = addr & 0xfe;
1886                 hdr->count = len;
1887
1888                 req.data[0] = PMU_I2C_CMD;
1889                 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
1890                 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
1891                 req.reply_expected = 0;
1892                 req.reply_len = 0;
1893                 req.reply[0] = 0xff;
1894                 rc = pmu_queue_request(&req);
1895                 if (rc)
1896                         return rc;
1897                 while(!req.complete)
1898                         pmu_poll();
1899                 if (req.reply[0] == PMU_I2C_STATUS_OK)
1900                         break;
1901                 mdelay(15);
1902         }
1903         if (req.reply[0] != PMU_I2C_STATUS_OK)
1904                 return -1;
1905
1906         for (retry=0; retry<16; retry++) {
1907                 memset(&req, 0, sizeof(req));
1908
1909                 mdelay(15);
1910
1911                 hdr->bus = PMU_I2C_BUS_STATUS;
1912                 req.reply[0] = 0xff;
1913
1914                 req.nbytes = 2;
1915                 req.reply_expected = 0;
1916                 req.reply_len = 0;
1917                 req.data[0] = PMU_I2C_CMD;
1918                 rc = pmu_queue_request(&req);
1919                 if (rc)
1920                         return rc;
1921                 while(!req.complete)
1922                         pmu_poll();
1923                 if (req.reply[0] == PMU_I2C_STATUS_OK)
1924                         return len;
1925         }
1926         return -1;
1927 }
1928
1929 int
1930 pmu_i2c_simple_read(int bus, int addr,  u8* data, int len)
1931 {
1932         struct adb_request      req;
1933         struct pmu_i2c_hdr      *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1934         int retry;
1935         int rc;
1936
1937         for (retry=0; retry<16; retry++) {
1938                 memset(&req, 0, sizeof(req));
1939
1940                 hdr->bus = bus;
1941                 hdr->address = addr | 1;
1942                 hdr->mode = PMU_I2C_MODE_SIMPLE;
1943                 hdr->bus2 = 0;
1944                 hdr->sub_addr = 0;
1945                 hdr->comb_addr = 0;
1946                 hdr->count = len;
1947
1948                 req.data[0] = PMU_I2C_CMD;
1949                 req.nbytes = sizeof(struct pmu_i2c_hdr) + 1;
1950                 req.reply_expected = 0;
1951                 req.reply_len = 0;
1952                 req.reply[0] = 0xff;
1953                 rc = pmu_queue_request(&req);
1954                 if (rc)
1955                         return rc;
1956                 while(!req.complete)
1957                         pmu_poll();
1958                 if (req.reply[0] == PMU_I2C_STATUS_OK)
1959                         break;
1960                 mdelay(15);
1961         }
1962         if (req.reply[0] != PMU_I2C_STATUS_OK)
1963                 return -1;
1964
1965         for (retry=0; retry<16; retry++) {
1966                 memset(&req, 0, sizeof(req));
1967
1968                 mdelay(15);
1969
1970                 hdr->bus = PMU_I2C_BUS_STATUS;
1971                 req.reply[0] = 0xff;
1972
1973                 req.nbytes = 2;
1974                 req.reply_expected = 0;
1975                 req.reply_len = 0;
1976                 req.data[0] = PMU_I2C_CMD;
1977                 rc = pmu_queue_request(&req);
1978                 if (rc)
1979                         return rc;
1980                 while(!req.complete)
1981                         pmu_poll();
1982                 if (req.reply[0] == PMU_I2C_STATUS_DATAREAD) {
1983                         memcpy(data, &req.reply[1], req.reply_len - 1);
1984                         return req.reply_len - 1;
1985                 }
1986         }
1987         return -1;
1988 }
1989
1990 int
1991 pmu_i2c_simple_write(int bus, int addr,  u8* data, int len)
1992 {
1993         struct adb_request      req;
1994         struct pmu_i2c_hdr      *hdr = (struct pmu_i2c_hdr *)&req.data[1];
1995         int retry;
1996         int rc;
1997
1998         for (retry=0; retry<16; retry++) {
1999                 memset(&req, 0, sizeof(req));
2000
2001                 hdr->bus = bus;
2002                 hdr->address = addr & 0xfe;
2003                 hdr->mode = PMU_I2C_MODE_SIMPLE;
2004                 hdr->bus2 = 0;
2005                 hdr->sub_addr = 0;
2006                 hdr->comb_addr = 0;
2007                 hdr->count = len;
2008
2009                 req.data[0] = PMU_I2C_CMD;
2010                 memcpy(&req.data[sizeof(struct pmu_i2c_hdr) + 1], data, len);
2011                 req.nbytes = sizeof(struct pmu_i2c_hdr) + len + 1;
2012                 req.reply_expected = 0;
2013                 req.reply_len = 0;
2014                 req.reply[0] = 0xff;
2015                 rc = pmu_queue_request(&req);
2016                 if (rc)
2017                         return rc;
2018                 while(!req.complete)
2019                         pmu_poll();
2020                 if (req.reply[0] == PMU_I2C_STATUS_OK)
2021                         break;
2022                 mdelay(15);
2023         }
2024         if (req.reply[0] != PMU_I2C_STATUS_OK)
2025                 return -1;
2026
2027         for (retry=0; retry<16; retry++) {
2028                 memset(&req, 0, sizeof(req));
2029
2030                 mdelay(15);
2031
2032                 hdr->bus = PMU_I2C_BUS_STATUS;
2033                 req.reply[0] = 0xff;
2034
2035                 req.nbytes = 2;
2036                 req.reply_expected = 0;
2037                 req.reply_len = 0;
2038                 req.data[0] = PMU_I2C_CMD;
2039                 rc = pmu_queue_request(&req);
2040                 if (rc)
2041                         return rc;
2042                 while(!req.complete)
2043                         pmu_poll();
2044                 if (req.reply[0] == PMU_I2C_STATUS_OK)
2045                         return len;
2046         }
2047         return -1;
2048 }
2049
2050 #ifdef CONFIG_PMAC_PBOOK
2051
2052 static LIST_HEAD(sleep_notifiers);
2053
2054 int
2055 pmu_register_sleep_notifier(struct pmu_sleep_notifier *n)
2056 {
2057         struct list_head *list;
2058         struct pmu_sleep_notifier *notifier;
2059
2060         for (list = sleep_notifiers.next; list != &sleep_notifiers;
2061              list = list->next) {
2062                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2063                 if (n->priority > notifier->priority)
2064                         break;
2065         }
2066         __list_add(&n->list, list->prev, list);
2067         return 0;
2068 }
2069
2070 int
2071 pmu_unregister_sleep_notifier(struct pmu_sleep_notifier* n)
2072 {
2073         if (n->list.next == 0)
2074                 return -ENOENT;
2075         list_del(&n->list);
2076         n->list.next = NULL;
2077         return 0;
2078 }
2079
2080 /* Sleep is broadcast last-to-first */
2081 static int __pmac
2082 broadcast_sleep(int when, int fallback)
2083 {
2084         int ret = PBOOK_SLEEP_OK;
2085         struct list_head *list;
2086         struct pmu_sleep_notifier *notifier;
2087
2088         for (list = sleep_notifiers.prev; list != &sleep_notifiers;
2089              list = list->prev) {
2090                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2091                 ret = notifier->notifier_call(notifier, when);
2092                 if (ret != PBOOK_SLEEP_OK) {
2093                         printk(KERN_DEBUG "sleep %d rejected by %p (%p)\n",
2094                                when, notifier, notifier->notifier_call);
2095                         for (; list != &sleep_notifiers; list = list->next) {
2096                                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2097                                 notifier->notifier_call(notifier, fallback);
2098                         }
2099                         return ret;
2100                 }
2101         }
2102         return ret;
2103 }
2104
2105 /* Wake is broadcast first-to-last */
2106 static int __pmac
2107 broadcast_wake(void)
2108 {
2109         int ret = PBOOK_SLEEP_OK;
2110         struct list_head *list;
2111         struct pmu_sleep_notifier *notifier;
2112
2113         for (list = sleep_notifiers.next; list != &sleep_notifiers;
2114              list = list->next) {
2115                 notifier = list_entry(list, struct pmu_sleep_notifier, list);
2116                 notifier->notifier_call(notifier, PBOOK_WAKE);
2117         }
2118         return ret;
2119 }
2120
2121 /*
2122  * This struct is used to store config register values for
2123  * PCI devices which may get powered off when we sleep.
2124  */
2125 static struct pci_save {
2126 #ifndef HACKED_PCI_SAVE
2127         u16     command;
2128         u16     cache_lat;
2129         u16     intr;
2130         u32     rom_address;
2131 #else
2132         u32     config[16];
2133 #endif
2134 } *pbook_pci_saves;
2135 static int pbook_npci_saves;
2136
2137 static void __pmac
2138 pbook_alloc_pci_save(void)
2139 {
2140         int npci;
2141         struct pci_dev *pd = NULL;
2142
2143         npci = 0;
2144         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2145                 ++npci;
2146         }
2147         if (npci == 0)
2148                 return;
2149         pbook_pci_saves = (struct pci_save *)
2150                 kmalloc(npci * sizeof(struct pci_save), GFP_KERNEL);
2151         pbook_npci_saves = npci;
2152 }
2153
2154 static void __pmac
2155 pbook_free_pci_save(void)
2156 {
2157         if (pbook_pci_saves == NULL)
2158                 return;
2159         kfree(pbook_pci_saves);
2160         pbook_pci_saves = NULL;
2161         pbook_npci_saves = 0;
2162 }
2163
2164 static void __pmac
2165 pbook_pci_save(void)
2166 {
2167         struct pci_save *ps = pbook_pci_saves;
2168         struct pci_dev *pd = NULL;
2169         int npci = pbook_npci_saves;
2170
2171         if (ps == NULL)
2172                 return;
2173
2174         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2175                 if (npci-- == 0)
2176                         return;
2177 #ifndef HACKED_PCI_SAVE
2178                 pci_read_config_word(pd, PCI_COMMAND, &ps->command);
2179                 pci_read_config_word(pd, PCI_CACHE_LINE_SIZE, &ps->cache_lat);
2180                 pci_read_config_word(pd, PCI_INTERRUPT_LINE, &ps->intr);
2181                 pci_read_config_dword(pd, PCI_ROM_ADDRESS, &ps->rom_address);
2182 #else
2183                 int i;
2184                 for (i=1;i<16;i++)
2185                         pci_read_config_dword(pd, i<<4, &ps->config[i]);
2186 #endif
2187                 ++ps;
2188         }
2189 }
2190
2191 /* For this to work, we must take care of a few things: If gmac was enabled
2192  * during boot, it will be in the pci dev list. If it's disabled at this point
2193  * (and it will probably be), then you can't access it's config space.
2194  */
2195 static void __pmac
2196 pbook_pci_restore(void)
2197 {
2198         u16 cmd;
2199         struct pci_save *ps = pbook_pci_saves - 1;
2200         struct pci_dev *pd = NULL;
2201         int npci = pbook_npci_saves;
2202         int j;
2203
2204         while ((pd = pci_find_device(PCI_ANY_ID, PCI_ANY_ID, pd)) != NULL) {
2205 #ifdef HACKED_PCI_SAVE
2206                 int i;
2207                 if (npci-- == 0)
2208                         return;
2209                 ps++;
2210                 for (i=2;i<16;i++)
2211                         pci_write_config_dword(pd, i<<4, ps->config[i]);
2212                 pci_write_config_dword(pd, 4, ps->config[1]);
2213 #else
2214                 if (npci-- == 0)
2215                         return;
2216                 ps++;
2217                 if (ps->command == 0)
2218                         continue;
2219                 pci_read_config_word(pd, PCI_COMMAND, &cmd);
2220                 if ((ps->command & ~cmd) == 0)
2221                         continue;
2222                 switch (pd->hdr_type) {
2223                 case PCI_HEADER_TYPE_NORMAL:
2224                         for (j = 0; j < 6; ++j)
2225                                 pci_write_config_dword(pd,
2226                                         PCI_BASE_ADDRESS_0 + j*4,
2227                                         pd->resource[j].start);
2228                         pci_write_config_dword(pd, PCI_ROM_ADDRESS,
2229                                 ps->rom_address);
2230                         pci_write_config_word(pd, PCI_CACHE_LINE_SIZE,
2231                                 ps->cache_lat);
2232                         pci_write_config_word(pd, PCI_INTERRUPT_LINE,
2233                                 ps->intr);
2234                         pci_write_config_word(pd, PCI_COMMAND, ps->command);
2235                         break;
2236                 }
2237 #endif
2238         }
2239 }
2240
2241 #ifdef DEBUG_SLEEP
2242 /* N.B. This doesn't work on the 3400 */
2243 void  __pmac
2244 pmu_blink(int n)
2245 {
2246         struct adb_request req;
2247
2248         memset(&req, 0, sizeof(req));
2249
2250         for (; n > 0; --n) {
2251                 req.nbytes = 4;
2252                 req.done = NULL;
2253                 req.data[0] = 0xee;
2254                 req.data[1] = 4;
2255                 req.data[2] = 0;
2256                 req.data[3] = 1;
2257                 req.reply[0] = ADB_RET_OK;
2258                 req.reply_len = 1;
2259                 req.reply_expected = 0;
2260                 pmu_polled_request(&req);
2261                 mdelay(50);
2262                 req.nbytes = 4;
2263                 req.done = NULL;
2264                 req.data[0] = 0xee;
2265                 req.data[1] = 4;
2266                 req.data[2] = 0;
2267                 req.data[3] = 0;
2268                 req.reply[0] = ADB_RET_OK;
2269                 req.reply_len = 1;
2270                 req.reply_expected = 0;
2271                 pmu_polled_request(&req);
2272                 mdelay(50);
2273         }
2274         mdelay(50);
2275 }
2276 #endif
2277
2278 /*
2279  * Put the powerbook to sleep.
2280  */
2281
2282 static u32 save_via[8] __pmacdata;
2283
2284 static void __pmac
2285 save_via_state(void)
2286 {
2287         save_via[0] = in_8(&via[ANH]);
2288         save_via[1] = in_8(&via[DIRA]);
2289         save_via[2] = in_8(&via[B]);
2290         save_via[3] = in_8(&via[DIRB]);
2291         save_via[4] = in_8(&via[PCR]);
2292         save_via[5] = in_8(&via[ACR]);
2293         save_via[6] = in_8(&via[T1CL]);
2294         save_via[7] = in_8(&via[T1CH]);
2295 }
2296 static void __pmac
2297 restore_via_state(void)
2298 {
2299         out_8(&via[ANH], save_via[0]);
2300         out_8(&via[DIRA], save_via[1]);
2301         out_8(&via[B], save_via[2]);
2302         out_8(&via[DIRB], save_via[3]);
2303         out_8(&via[PCR], save_via[4]);
2304         out_8(&via[ACR], save_via[5]);
2305         out_8(&via[T1CL], save_via[6]);
2306         out_8(&via[T1CH], save_via[7]);
2307         out_8(&via[IER], IER_CLR | 0x7f);       /* disable all intrs */
2308         out_8(&via[IFR], 0x7f);                         /* clear IFR */
2309         out_8(&via[IER], IER_SET | SR_INT | CB1_INT);
2310 }
2311
2312 static int __pmac
2313 pmac_suspend_devices(void)
2314 {
2315         int ret;
2316
2317         pm_prepare_console();
2318
2319         /* Notify old-style device drivers & userland */
2320         ret = broadcast_sleep(PBOOK_SLEEP_REQUEST, PBOOK_SLEEP_REJECT);
2321         if (ret != PBOOK_SLEEP_OK) {
2322                 printk(KERN_ERR "Sleep rejected by drivers\n");
2323                 return -EBUSY;
2324         }
2325
2326         /* Sync the disks. */
2327         /* XXX It would be nice to have some way to ensure that
2328          * nobody is dirtying any new buffers while we wait. That
2329          * could be acheived using the refrigerator for processes
2330          * that swsusp uses
2331          */
2332         sys_sync();
2333
2334         /* Sleep can fail now. May not be very robust but useful for debugging */
2335         ret = broadcast_sleep(PBOOK_SLEEP_NOW, PBOOK_WAKE);
2336         if (ret != PBOOK_SLEEP_OK) {
2337                 printk(KERN_ERR "Driver sleep failed\n");
2338                 return -EBUSY;
2339         }
2340
2341         /* Send suspend call to devices, hold the device core's dpm_sem */
2342         ret = device_suspend(PM_SUSPEND_MEM);
2343         if (ret) {
2344                 printk(KERN_ERR "Driver sleep failed\n");
2345                 broadcast_wake();
2346                 return -EBUSY;
2347         }
2348
2349         preempt_disable();
2350
2351         /* Make sure the decrementer won't interrupt us */
2352         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2353         /* Make sure any pending DEC interrupt occurring while we did
2354          * the above didn't re-enable the DEC */
2355         mb();
2356         asm volatile("mtdec %0" : : "r" (0x7fffffff));
2357
2358         /* We can now disable MSR_EE. This code of course works properly only
2359          * on UP machines... For SMP, if we ever implement sleep, we'll have to
2360          * stop the "other" CPUs way before we do all that stuff.
2361          */
2362         local_irq_disable();
2363
2364         /* Broadcast power down irq
2365          * This isn't that useful in most cases (only directly wired devices can
2366          * use this but still... This will take care of sysdev's as well, so
2367          * we exit from here with local irqs disabled and PIC off.
2368          */
2369         ret = device_power_down(PM_SUSPEND_MEM);
2370         if (ret) {
2371                 wakeup_decrementer();
2372                 local_irq_enable();
2373                 preempt_enable();
2374                 device_resume();
2375                 broadcast_wake();
2376                 printk(KERN_ERR "Driver powerdown failed\n");
2377                 return -EBUSY;
2378         }
2379
2380         /* Wait for completion of async backlight requests */
2381         while (!bright_req_1.complete || !bright_req_2.complete ||
2382
2383                         !batt_req.complete)
2384                 pmu_poll();
2385
2386         /* Giveup the lazy FPU & vec so we don't have to back them
2387          * up from the low level code
2388          */
2389         enable_kernel_fp();
2390
2391 #ifdef CONFIG_ALTIVEC
2392         if (cur_cpu_spec[0]->cpu_features & CPU_FTR_ALTIVEC)
2393                 enable_kernel_altivec();
2394 #endif /* CONFIG_ALTIVEC */
2395
2396         return 0;
2397 }
2398
2399 static int __pmac
2400 pmac_wakeup_devices(void)
2401 {
2402         mdelay(100);
2403
2404         /* Power back up system devices (including the PIC) */
2405         device_power_up();
2406
2407         pmu_blink(1);
2408
2409         /* Force a poll of ADB interrupts */
2410         adb_int_pending = 1;
2411         via_pmu_interrupt(0, NULL, NULL);
2412
2413         /* Restart jiffies & scheduling */
2414         wakeup_decrementer();
2415
2416         /* Re-enable local CPU interrupts */
2417         local_irq_enable();
2418
2419         pmu_blink(1);
2420
2421         preempt_enable();
2422
2423         /* Resume devices */
2424         device_resume();
2425
2426         /* Notify old style drivers */
2427         broadcast_wake();
2428
2429         pm_restore_console();
2430
2431         return 0;
2432 }
2433
2434 #define GRACKLE_PM      (1<<7)
2435 #define GRACKLE_DOZE    (1<<5)
2436 #define GRACKLE_NAP     (1<<4)
2437 #define GRACKLE_SLEEP   (1<<3)
2438
2439 int __pmac
2440 powerbook_sleep_grackle(void)
2441 {
2442         unsigned long save_l2cr;
2443         unsigned short pmcr1;
2444         struct adb_request req;
2445         int ret;
2446         struct pci_dev *grackle;
2447
2448         grackle = pci_find_slot(0, 0);
2449         if (!grackle)
2450                 return -ENODEV;
2451
2452         ret = pmac_suspend_devices();
2453         if (ret) {
2454                 printk(KERN_ERR "Sleep rejected by devices\n");
2455                 return ret;
2456         }
2457
2458         /* Turn off various things. Darwin does some retry tests here... */
2459         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
2460         pmu_wait_complete(&req);
2461         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2462                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2463         pmu_wait_complete(&req);
2464
2465         /* For 750, save backside cache setting and disable it */
2466         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2467         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2468                 _set_L2CR(save_l2cr & 0x7fffffff);
2469
2470         if (!__fake_sleep) {
2471                 /* Ask the PMU to put us to sleep */
2472                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2473                 pmu_wait_complete(&req);
2474         }
2475
2476         /* The VIA is supposed not to be restored correctly*/
2477         save_via_state();
2478         /* We shut down some HW */
2479         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2480
2481         pci_read_config_word(grackle, 0x70, &pmcr1);
2482         /* Apparently, MacOS uses NAP mode for Grackle ??? */
2483         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
2484         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
2485         pci_write_config_word(grackle, 0x70, pmcr1);
2486
2487         /* Call low-level ASM sleep handler */
2488         if (__fake_sleep)
2489                 mdelay(5000);
2490         else
2491                 low_sleep_handler();
2492
2493         /* We're awake again, stop grackle PM */
2494         pci_read_config_word(grackle, 0x70, &pmcr1);
2495         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
2496         pci_write_config_word(grackle, 0x70, pmcr1);
2497
2498         /* Make sure the PMU is idle */
2499         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2500         restore_via_state();
2501
2502         /* Restore L2 cache */
2503         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2504                 _set_L2CR(save_l2cr);
2505
2506         /* Restore userland MMU context */
2507         set_context(current->active_mm->context, current->active_mm->pgd);
2508
2509         /* Power things up */
2510         pmu_unlock();
2511         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2512         pmu_wait_complete(&req);
2513         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
2514                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
2515         pmu_wait_complete(&req);
2516         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
2517                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
2518         pmu_wait_complete(&req);
2519
2520         pmac_wakeup_devices();
2521
2522         return 0;
2523 }
2524
2525 static int __pmac
2526 powerbook_sleep_Core99(void)
2527 {
2528         unsigned long save_l2cr;
2529         unsigned long save_l3cr;
2530         struct adb_request req;
2531         int ret;
2532
2533         if (!can_sleep) {
2534                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
2535                 return -ENOSYS;
2536         }
2537
2538         ret = pmac_suspend_devices();
2539         if (ret) {
2540                 printk(KERN_ERR "Sleep rejected by devices\n");
2541                 return ret;
2542         }
2543
2544         /* Tell PMU what events will wake us up */
2545         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
2546                 0xff, 0xff);
2547         pmu_wait_complete(&req);
2548         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
2549                 0, PMU_PWR_WAKEUP_KEY |
2550                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
2551         pmu_wait_complete(&req);
2552
2553         /* Save & disable L2 and L3 caches*/
2554         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
2555         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
2556         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2557                 _set_L3CR(save_l3cr & 0x7fffffff);
2558         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2559                 _set_L2CR(save_l2cr & 0x7fffffff);
2560
2561         /* Save the state of PCI config space for some slots */
2562         //pbook_pci_save();
2563
2564         if (!__fake_sleep) {
2565                 /* Ask the PMU to put us to sleep */
2566                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2567                 pmu_wait_complete(&req);
2568         }
2569
2570         /* The VIA is supposed not to be restored correctly*/
2571         save_via_state();
2572
2573         /* Shut down various ASICs. There's a chance that we can no longer
2574          * talk to the PMU after this, so I moved it to _after_ sending the
2575          * sleep command to it. Still need to be checked.
2576          */
2577         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2578
2579         /* Call low-level ASM sleep handler */
2580         if (__fake_sleep)
2581                 mdelay(5000);
2582         else
2583                 low_sleep_handler();
2584
2585         /* Restore Apple core ASICs state */
2586         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2587
2588         /* Restore VIA */
2589         restore_via_state();
2590
2591         /* Restore PCI config space. This should be overridable by PCI device
2592          * drivers as some of them may need special restore code. That's yet
2593          * another issue that should be handled by the common code properly,
2594          * maybe one day ?
2595          */
2596         /* Don't restore PCI for now, it crashes. Maybe unnecessary on pbook */
2597         //pbook_pci_restore();
2598
2599         /* Restore L2 cache */
2600         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2601                 _set_L2CR(save_l2cr);
2602         /* Restore L3 cache */
2603         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2604                 _set_L3CR(save_l3cr);
2605
2606         /* Restore userland MMU context */
2607         set_context(current->active_mm->context, current->active_mm->pgd);
2608
2609         /* Tell PMU we are ready */
2610         pmu_unlock();
2611         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2612         pmu_wait_complete(&req);
2613         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2614         pmu_wait_complete(&req);
2615
2616         pmu_blink(1);
2617
2618         pmac_wakeup_devices();
2619
2620         return 0;
2621 }
2622
2623 #define PB3400_MEM_CTRL         0xf8000000
2624 #define PB3400_MEM_CTRL_SLEEP   0x70
2625
2626 static int __pmac
2627 powerbook_sleep_3400(void)
2628 {
2629         int ret, i, x;
2630         unsigned int hid0;
2631         unsigned long p;
2632         struct adb_request sleep_req;
2633         char *mem_ctrl;
2634         unsigned int *mem_ctrl_sleep;
2635
2636         /* first map in the memory controller registers */
2637         mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2638         if (mem_ctrl == NULL) {
2639                 printk("powerbook_sleep_3400: ioremap failed\n");
2640                 return -ENOMEM;
2641         }
2642         mem_ctrl_sleep = (unsigned int *) (mem_ctrl + PB3400_MEM_CTRL_SLEEP);
2643
2644         /* Allocate room for PCI save */
2645         pbook_alloc_pci_save();
2646
2647         ret = pmac_suspend_devices();
2648         if (ret) {
2649                 pbook_free_pci_save();
2650                 printk(KERN_ERR "Sleep rejected by devices\n");
2651                 return ret;
2652         }
2653
2654         /* Save the state of PCI config space for some slots */
2655         pbook_pci_save();
2656
2657         /* Set the memory controller to keep the memory refreshed
2658            while we're asleep */
2659         for (i = 0x403f; i >= 0x4000; --i) {
2660                 out_be32(mem_ctrl_sleep, i);
2661                 do {
2662                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2663                 } while (x == 0);
2664                 if (x >= 0x100)
2665                         break;
2666         }
2667
2668         /* Ask the PMU to put us to sleep */
2669         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2670         while (!sleep_req.complete)
2671                 mb();
2672
2673         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
2674
2675         /* displacement-flush the L2 cache - necessary? */
2676         for (p = KERNELBASE; p < KERNELBASE + 0x100000; p += 0x1000)
2677                 i = *(volatile int *)p;
2678         asleep = 1;
2679
2680         /* Put the CPU into sleep mode */
2681         asm volatile("mfspr %0,1008" : "=r" (hid0) :);
2682         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2683         asm volatile("mtspr 1008,%0" : : "r" (hid0));
2684         _nmask_and_or_msr(0, MSR_POW | MSR_EE);
2685         udelay(10);
2686
2687         /* OK, we're awake again, start restoring things */
2688         out_be32(mem_ctrl_sleep, 0x3f);
2689         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
2690         pbook_pci_restore();
2691         pmu_unlock();
2692
2693         /* wait for the PMU interrupt sequence to complete */
2694         while (asleep)
2695                 mb();
2696
2697         pmac_wakeup_devices();
2698         pbook_free_pci_save();
2699         iounmap(mem_ctrl);
2700
2701         return 0;
2702 }
2703
2704 /*
2705  * Support for /dev/pmu device
2706  */
2707 #define RB_SIZE         0x10
2708 struct pmu_private {
2709         struct list_head list;
2710         int     rb_get;
2711         int     rb_put;
2712         struct rb_entry {
2713                 unsigned short len;
2714                 unsigned char data[16];
2715         }       rb_buf[RB_SIZE];
2716         wait_queue_head_t wait;
2717         spinlock_t lock;
2718 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2719         int     backlight_locker;
2720 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2721 };
2722
2723 static LIST_HEAD(all_pmu_pvt);
2724 static spinlock_t all_pvt_lock __pmacdata = SPIN_LOCK_UNLOCKED;
2725
2726 static void __pmac
2727 pmu_pass_intr(unsigned char *data, int len)
2728 {
2729         struct pmu_private *pp;
2730         struct list_head *list;
2731         int i;
2732         unsigned long flags;
2733
2734         if (len > sizeof(pp->rb_buf[0].data))
2735                 len = sizeof(pp->rb_buf[0].data);
2736         spin_lock_irqsave(&all_pvt_lock, flags);
2737         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2738                 pp = list_entry(list, struct pmu_private, list);
2739                 spin_lock(&pp->lock);
2740                 i = pp->rb_put + 1;
2741                 if (i >= RB_SIZE)
2742                         i = 0;
2743                 if (i != pp->rb_get) {
2744                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2745                         rp->len = len;
2746                         memcpy(rp->data, data, len);
2747                         pp->rb_put = i;
2748                         wake_up_interruptible(&pp->wait);
2749                 }
2750                 spin_unlock(&pp->lock);
2751         }
2752         spin_unlock_irqrestore(&all_pvt_lock, flags);
2753 }
2754
2755 static int __pmac
2756 pmu_open(struct inode *inode, struct file *file)
2757 {
2758         struct pmu_private *pp;
2759         unsigned long flags;
2760
2761         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2762         if (pp == 0)
2763                 return -ENOMEM;
2764         pp->rb_get = pp->rb_put = 0;
2765         spin_lock_init(&pp->lock);
2766         init_waitqueue_head(&pp->wait);
2767         spin_lock_irqsave(&all_pvt_lock, flags);
2768 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2769         pp->backlight_locker = 0;
2770 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2771         list_add(&pp->list, &all_pmu_pvt);
2772         spin_unlock_irqrestore(&all_pvt_lock, flags);
2773         file->private_data = pp;
2774         return 0;
2775 }
2776
2777 static ssize_t  __pmac
2778 pmu_read(struct file *file, char __user *buf,
2779                         size_t count, loff_t *ppos)
2780 {
2781         struct pmu_private *pp = file->private_data;
2782         DECLARE_WAITQUEUE(wait, current);
2783         unsigned long flags;
2784         int ret;
2785
2786         if (count < 1 || pp == 0)
2787                 return -EINVAL;
2788         ret = verify_area(VERIFY_WRITE, buf, count);
2789         if (ret)
2790                 return ret;
2791
2792         spin_lock_irqsave(&pp->lock, flags);
2793         add_wait_queue(&pp->wait, &wait);
2794         current->state = TASK_INTERRUPTIBLE;
2795
2796         for (;;) {
2797                 ret = -EAGAIN;
2798                 if (pp->rb_get != pp->rb_put) {
2799                         int i = pp->rb_get;
2800                         struct rb_entry *rp = &pp->rb_buf[i];
2801                         ret = rp->len;
2802                         spin_unlock_irqrestore(&pp->lock, flags);
2803                         if (ret > count)
2804                                 ret = count;
2805                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2806                                 ret = -EFAULT;
2807                         if (++i >= RB_SIZE)
2808                                 i = 0;
2809                         spin_lock_irqsave(&pp->lock, flags);
2810                         pp->rb_get = i;
2811                 }
2812                 if (ret >= 0)
2813                         break;
2814                 if (file->f_flags & O_NONBLOCK)
2815                         break;
2816                 ret = -ERESTARTSYS;
2817                 if (signal_pending(current))
2818                         break;
2819                 spin_unlock_irqrestore(&pp->lock, flags);
2820                 schedule();
2821                 spin_lock_irqsave(&pp->lock, flags);
2822         }
2823         current->state = TASK_RUNNING;
2824         remove_wait_queue(&pp->wait, &wait);
2825         spin_unlock_irqrestore(&pp->lock, flags);
2826
2827         return ret;
2828 }
2829
2830 static ssize_t __pmac
2831 pmu_write(struct file *file, const char __user *buf,
2832                          size_t count, loff_t *ppos)
2833 {
2834         return 0;
2835 }
2836
2837 static unsigned int __pmac
2838 pmu_fpoll(struct file *filp, poll_table *wait)
2839 {
2840         struct pmu_private *pp = filp->private_data;
2841         unsigned int mask = 0;
2842         unsigned long flags;
2843
2844         if (pp == 0)
2845                 return 0;
2846         poll_wait(filp, &pp->wait, wait);
2847         spin_lock_irqsave(&pp->lock, flags);
2848         if (pp->rb_get != pp->rb_put)
2849                 mask |= POLLIN;
2850         spin_unlock_irqrestore(&pp->lock, flags);
2851         return mask;
2852 }
2853
2854 static int __pmac
2855 pmu_release(struct inode *inode, struct file *file)
2856 {
2857         struct pmu_private *pp = file->private_data;
2858         unsigned long flags;
2859
2860         lock_kernel();
2861         if (pp != 0) {
2862                 file->private_data = NULL;
2863                 spin_lock_irqsave(&all_pvt_lock, flags);
2864                 list_del(&pp->list);
2865                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2866 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2867                 if (pp->backlight_locker) {
2868                         spin_lock_irqsave(&pmu_lock, flags);
2869                         disable_kernel_backlight--;
2870                         spin_unlock_irqrestore(&pmu_lock, flags);
2871                 }
2872 #endif /* defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT) */
2873                 kfree(pp);
2874         }
2875         unlock_kernel();
2876         return 0;
2877 }
2878
2879 /* Note: removed __openfirmware here since it causes link errors */
2880 static int __pmac
2881 pmu_ioctl(struct inode * inode, struct file *filp,
2882                      u_int cmd, u_long arg)
2883 {
2884         struct pmu_private *pp = filp->private_data;
2885         __u32 __user *argp = (__u32 __user *)arg;
2886         int error;
2887
2888         switch (cmd) {
2889         case PMU_IOC_SLEEP:
2890                 if (!capable(CAP_SYS_ADMIN))
2891                         return -EACCES;
2892                 if (sleep_in_progress)
2893                         return -EBUSY;
2894                 sleep_in_progress = 1;
2895                 switch (pmu_kind) {
2896                 case PMU_OHARE_BASED:
2897                         error = powerbook_sleep_3400();
2898                         break;
2899                 case PMU_HEATHROW_BASED:
2900                 case PMU_PADDINGTON_BASED:
2901                         error = powerbook_sleep_grackle();
2902                         break;
2903                 case PMU_KEYLARGO_BASED:
2904                         error = powerbook_sleep_Core99();
2905                         break;
2906                 default:
2907                         error = -ENOSYS;
2908                 }
2909                 sleep_in_progress = 0;
2910                 return error;
2911         case PMU_IOC_CAN_SLEEP:
2912                 return put_user((u32)can_sleep, argp);
2913
2914 #ifdef CONFIG_PMAC_BACKLIGHT
2915         /* Backlight should have its own device or go via
2916          * the fbdev
2917          */
2918         case PMU_IOC_GET_BACKLIGHT:
2919                 if (sleep_in_progress)
2920                         return -EBUSY;
2921                 error = get_backlight_level();
2922                 if (error < 0)
2923                         return error;
2924                 return put_user(error, argp);
2925         case PMU_IOC_SET_BACKLIGHT:
2926         {
2927                 __u32 value;
2928                 if (sleep_in_progress)
2929                         return -EBUSY;
2930                 error = get_user(value, argp);
2931                 if (!error)
2932                         error = set_backlight_level(value);
2933                 return error;
2934         }
2935 #ifdef CONFIG_INPUT_ADBHID
2936         case PMU_IOC_GRAB_BACKLIGHT: {
2937                 unsigned long flags;
2938                 if (pp->backlight_locker)
2939                         return 0;
2940                 pp->backlight_locker = 1;
2941                 spin_lock_irqsave(&pmu_lock, flags);
2942                 disable_kernel_backlight++;
2943                 spin_unlock_irqrestore(&pmu_lock, flags);
2944                 return 0;
2945         }
2946 #endif /* CONFIG_INPUT_ADBHID */
2947 #endif /* CONFIG_PMAC_BACKLIGHT */
2948         case PMU_IOC_GET_MODEL:
2949                 return put_user(pmu_kind, argp);
2950         case PMU_IOC_HAS_ADB:
2951                 return put_user(pmu_has_adb, argp);
2952         }
2953         return -EINVAL;
2954 }
2955
2956 static struct file_operations pmu_device_fops __pmacdata = {
2957         .read           = pmu_read,
2958         .write          = pmu_write,
2959         .poll           = pmu_fpoll,
2960         .ioctl          = pmu_ioctl,
2961         .open           = pmu_open,
2962         .release        = pmu_release,
2963 };
2964
2965 static struct miscdevice pmu_device __pmacdata = {
2966         PMU_MINOR, "pmu", &pmu_device_fops
2967 };
2968
2969 void pmu_device_init(void)
2970 {
2971         if (!via)
2972                 return;
2973         if (misc_register(&pmu_device) < 0)
2974                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2975 }
2976 #endif /* CONFIG_PMAC_PBOOK */
2977
2978 #ifdef DEBUG_SLEEP
2979 static inline void  __pmac
2980 polled_handshake(volatile unsigned char *via)
2981 {
2982         via[B] &= ~TREQ; eieio();
2983         while ((via[B] & TACK) != 0)
2984                 ;
2985         via[B] |= TREQ; eieio();
2986         while ((via[B] & TACK) == 0)
2987                 ;
2988 }
2989
2990 static inline void  __pmac
2991 polled_send_byte(volatile unsigned char *via, int x)
2992 {
2993         via[ACR] |= SR_OUT | SR_EXT; eieio();
2994         via[SR] = x; eieio();
2995         polled_handshake(via);
2996 }
2997
2998 static inline int __pmac
2999 polled_recv_byte(volatile unsigned char *via)
3000 {
3001         int x;
3002
3003         via[ACR] = (via[ACR] & ~SR_OUT) | SR_EXT; eieio();
3004         x = via[SR]; eieio();
3005         polled_handshake(via);
3006         x = via[SR]; eieio();
3007         return x;
3008 }
3009
3010 int __pmac
3011 pmu_polled_request(struct adb_request *req)
3012 {
3013         unsigned long flags;
3014         int i, l, c;
3015         volatile unsigned char *v = via;
3016
3017         req->complete = 1;
3018         c = req->data[0];
3019         l = pmu_data_len[c][0];
3020         if (l >= 0 && req->nbytes != l + 1)
3021                 return -EINVAL;
3022
3023         local_irq_save(flags);
3024         while (pmu_state != idle)
3025                 pmu_poll();
3026
3027         while ((via[B] & TACK) == 0)
3028                 ;
3029         polled_send_byte(v, c);
3030         if (l < 0) {
3031                 l = req->nbytes - 1;
3032                 polled_send_byte(v, l);
3033         }
3034         for (i = 1; i <= l; ++i)
3035                 polled_send_byte(v, req->data[i]);
3036
3037         l = pmu_data_len[c][1];
3038         if (l < 0)
3039                 l = polled_recv_byte(v);
3040         for (i = 0; i < l; ++i)
3041                 req->reply[i + req->reply_len] = polled_recv_byte(v);
3042
3043         if (req->done)
3044                 (*req->done)(req);
3045
3046         local_irq_restore(flags);
3047         return 0;
3048 }
3049 #endif /* DEBUG_SLEEP */
3050
3051 EXPORT_SYMBOL(pmu_request);
3052 EXPORT_SYMBOL(pmu_poll);
3053 EXPORT_SYMBOL(pmu_poll_adb);
3054 EXPORT_SYMBOL(pmu_wait_complete);
3055 EXPORT_SYMBOL(pmu_suspend);
3056 EXPORT_SYMBOL(pmu_resume);
3057 EXPORT_SYMBOL(pmu_unlock);
3058 EXPORT_SYMBOL(pmu_i2c_combined_read);
3059 EXPORT_SYMBOL(pmu_i2c_stdsub_write);
3060 EXPORT_SYMBOL(pmu_i2c_simple_read);
3061 EXPORT_SYMBOL(pmu_i2c_simple_write);
3062 #ifdef CONFIG_PMAC_PBOOK
3063 EXPORT_SYMBOL(pmu_register_sleep_notifier);
3064 EXPORT_SYMBOL(pmu_unregister_sleep_notifier);
3065 EXPORT_SYMBOL(pmu_enable_irled);
3066 EXPORT_SYMBOL(pmu_battery_count);
3067 EXPORT_SYMBOL(pmu_batteries);
3068 EXPORT_SYMBOL(pmu_power_flags);
3069 #endif /* CONFIG_PMAC_PBOOK */
3070