drivers/macintosh/via-pmu.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Device driver for the PMU in Apple PowerBooks and PowerMacs.
   4  *
   5  * The VIA (versatile interface adapter) interfaces to the PMU,
   6  * a 6805 microprocessor core whose primary function is to control
   7  * battery charging and system power on the PowerBook 3400 and 2400.
   8  * The PMU also controls the ADB (Apple Desktop Bus) which connects
   9  * to the keyboard and mouse, as well as the non-volatile RAM
  10  * and the RTC (real time clock) chip.
  11  *
  12  * Copyright (C) 1998 Paul Mackerras and Fabio Riccardi.
  13  * Copyright (C) 2001-2002 Benjamin Herrenschmidt
  14  * Copyright (C) 2006-2007 Johannes Berg
  15  *
  16  * THIS DRIVER IS BECOMING A TOTAL MESS !
  17  *  - Cleanup atomically disabling reply to PMU events after
  18  *    a sleep or a freq. switch
  19  *
  20  */
  21 #include <stdarg.h>
  22 #include <linux/mutex.h>
  23 #include <linux/types.h>
  24 #include <linux/errno.h>
  25 #include <linux/kernel.h>
  26 #include <linux/delay.h>
  27 #include <linux/sched/signal.h>
  28 #include <linux/miscdevice.h>
  29 #include <linux/blkdev.h>
  30 #include <linux/pci.h>
  31 #include <linux/slab.h>
  32 #include <linux/poll.h>
  33 #include <linux/adb.h>
  34 #include <linux/pmu.h>
  35 #include <linux/cuda.h>
  36 #include <linux/module.h>
  37 #include <linux/spinlock.h>
  38 #include <linux/pm.h>
  39 #include <linux/proc_fs.h>
  40 #include <linux/seq_file.h>
  41 #include <linux/init.h>
  42 #include <linux/interrupt.h>
  43 #include <linux/device.h>
  44 #include <linux/syscore_ops.h>
  45 #include <linux/freezer.h>
  46 #include <linux/syscalls.h>
  47 #include <linux/suspend.h>
  48 #include <linux/cpu.h>
  49 #include <linux/compat.h>
  50 #include <linux/of_address.h>
  51 #include <linux/of_irq.h>
  52 #include <linux/uaccess.h>
  53 #include <linux/pgtable.h>
  54 #include <asm/machdep.h>
  55 #include <asm/io.h>
  56 #include <asm/sections.h>
  57 #include <asm/irq.h>
  58 #ifdef CONFIG_PPC_PMAC
  59 #include <asm/pmac_feature.h>
  60 #include <asm/pmac_pfunc.h>
  61 #include <asm/pmac_low_i2c.h>
  62 #include <asm/prom.h>
  63 #include <asm/mmu_context.h>
  64 #include <asm/cputable.h>
  65 #include <asm/time.h>
  66 #include <asm/backlight.h>
  67 #else
  68 #include <asm/macintosh.h>
  69 #include <asm/macints.h>
  70 #include <asm/mac_via.h>
  71 #endif
  72
  73 #include "via-pmu-event.h"
  74
  75 /* Some compile options */
  76 #undef DEBUG_SLEEP
  77
  78 /* How many iterations between battery polls */
  79 #define BATTERY_POLLING_COUNT   2
  80
  81 static DEFINE_MUTEX(pmu_info_proc_mutex);
  82
  83 /* VIA registers - spaced 0x200 bytes apart */
  84 #define RS              0x200           /* skip between registers */
  85 #define B               0               /* B-side data */
  86 #define A               RS              /* A-side data */
  87 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  88 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  89 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  90 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  91 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  92 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  93 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  94 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  95 #define SR              (10*RS)         /* Shift register */
  96 #define ACR             (11*RS)         /* Auxiliary control register */
  97 #define PCR             (12*RS)         /* Peripheral control register */
  98 #define IFR             (13*RS)         /* Interrupt flag register */
  99 #define IER             (14*RS)         /* Interrupt enable register */
 100 #define ANH             (15*RS)         /* A-side data, no handshake */
 101
 102 /* Bits in B data register: both active low */
 103 #ifdef CONFIG_PPC_PMAC
 104 #define TACK            0x08            /* Transfer acknowledge (input) */
 105 #define TREQ            0x10            /* Transfer request (output) */
 106 #else
 107 #define TACK            0x02
 108 #define TREQ            0x04
 109 #endif
 110
 111 /* Bits in ACR */
 112 #define SR_CTRL         0x1c            /* Shift register control bits */
 113 #define SR_EXT          0x0c            /* Shift on external clock */
 114 #define SR_OUT          0x10            /* Shift out if 1 */
 115
 116 /* Bits in IFR and IER */
 117 #define IER_SET         0x80            /* set bits in IER */
 118 #define IER_CLR         0               /* clear bits in IER */
 119 #define SR_INT          0x04            /* Shift register full/empty */
 120 #define CB2_INT         0x08
 121 #define CB1_INT         0x10            /* transition on CB1 input */
 122
 123 static volatile enum pmu_state {
 124         uninitialized = 0,
 125         idle,
 126         sending,
 127         intack,
 128         reading,
 129         reading_intr,
 130         locked,
 131 } pmu_state;
 132
 133 static volatile enum int_data_state {
 134         int_data_empty,
 135         int_data_fill,
 136         int_data_ready,
 137         int_data_flush
 138 } int_data_state[2] = { int_data_empty, int_data_empty };
 139
 140 static struct adb_request *current_req;
 141 static struct adb_request *last_req;
 142 static struct adb_request *req_awaiting_reply;
 143 static unsigned char interrupt_data[2][32];
 144 static int interrupt_data_len[2];
 145 static int int_data_last;
 146 static unsigned char *reply_ptr;
 147 static int data_index;
 148 static int data_len;
 149 static volatile int adb_int_pending;
 150 static volatile int disable_poll;
 151 static int pmu_kind = PMU_UNKNOWN;
 152 static int pmu_fully_inited;
 153 static int pmu_has_adb;
 154 #ifdef CONFIG_PPC_PMAC
 155 static volatile unsigned char __iomem *via1;
 156 static volatile unsigned char __iomem *via2;
 157 static struct device_node *vias;
 158 static struct device_node *gpio_node;
 159 #endif
 160 static unsigned char __iomem *gpio_reg;
 161 static int gpio_irq = 0;
 162 static int gpio_irq_enabled = -1;
 163 static volatile int pmu_suspended;
 164 static spinlock_t pmu_lock;
 165 static u8 pmu_intr_mask;
 166 static int pmu_version;
 167 static int drop_interrupts;
 168 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 169 static int option_lid_wakeup = 1;
 170 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 171 static unsigned long async_req_locks;
 172
 173 #define NUM_IRQ_STATS 13
 174 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
 175
 176 static struct proc_dir_entry *proc_pmu_root;
 177 static struct proc_dir_entry *proc_pmu_info;
 178 static struct proc_dir_entry *proc_pmu_irqstats;
 179 static struct proc_dir_entry *proc_pmu_options;
 180 static int option_server_mode;
 181
 182 int pmu_battery_count;
 183 static int pmu_cur_battery;
 184 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 185 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 186 static int query_batt_timer = BATTERY_POLLING_COUNT;
 187 static struct adb_request batt_req;
 188 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 189
 190 int asleep;
 191
 192 #ifdef CONFIG_ADB
 193 static int adb_dev_map;
 194 static int pmu_adb_flags;
 195
 196 static int pmu_probe(void);
 197 static int pmu_init(void);
 198 static int pmu_send_request(struct adb_request *req, int sync);
 199 static int pmu_adb_autopoll(int devs);
 200 static int pmu_adb_reset_bus(void);
 201 #endif /* CONFIG_ADB */
 202
 203 static int init_pmu(void);
 204 static void pmu_start(void);
 205 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 206 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 207 static int pmu_info_proc_show(struct seq_file *m, void *v);
 208 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
 209 static int pmu_battery_proc_show(struct seq_file *m, void *v);
 210 static void pmu_pass_intr(unsigned char *data, int len);
 211 static const struct proc_ops pmu_options_proc_ops;
 212
 213 #ifdef CONFIG_ADB
 214 const struct adb_driver via_pmu_driver = {
 215         .name         = "PMU",
 216         .probe        = pmu_probe,
 217         .init         = pmu_init,
 218         .send_request = pmu_send_request,
 219         .autopoll     = pmu_adb_autopoll,
 220         .poll         = pmu_poll_adb,
 221         .reset_bus    = pmu_adb_reset_bus,
 222 };
 223 #endif /* CONFIG_ADB */
 224
 225 extern void low_sleep_handler(void);
 226 extern void enable_kernel_altivec(void);
 227 extern void enable_kernel_fp(void);
 228
 229 #ifdef DEBUG_SLEEP
 230 int pmu_polled_request(struct adb_request *req);
 231 void pmu_blink(int n);
 232 #endif
 233
 234 /*
 235  * This table indicates for each PMU opcode:
 236  * - the number of data bytes to be sent with the command, or -1
 237  *   if a length byte should be sent,
 238  * - the number of response bytes which the PMU will return, or
 239  *   -1 if it will send a length byte.
 240  */
 241 static const s8 pmu_data_len[256][2] = {
 242 /*         0       1       2       3       4       5       6       7  */
 243 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 244 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 245 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 246 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 247 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 249 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 250 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 251 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 253 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 254 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 255 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 257 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 258 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 259 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 261 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 263 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 264 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 267 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 268 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 269 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 271 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 272 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 273 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 274 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 275 };
 276
 277 static char *pbook_type[] = {
 278         "Unknown PowerBook",
 279         "PowerBook 2400/3400/3500(G3)",
 280         "PowerBook G3 Series",
 281         "1999 PowerBook G3",
 282         "Core99"
 283 };
 284
 285 int __init find_via_pmu(void)
 286 {
 287 #ifdef CONFIG_PPC_PMAC
 288         u64 taddr;
 289         const u32 *reg;
 290
 291         if (pmu_state != uninitialized)
 292                 return 1;
 293         vias = of_find_node_by_name(NULL, "via-pmu");
 294         if (vias == NULL)
 295                 return 0;
 296
 297         reg = of_get_property(vias, "reg", NULL);
 298         if (reg == NULL) {
 299                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 300                 goto fail;
 301         }
 302         taddr = of_translate_address(vias, reg);
 303         if (taddr == OF_BAD_ADDR) {
 304                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 305                 goto fail;
 306         }
 307
 308         spin_lock_init(&pmu_lock);
 309
 310         pmu_has_adb = 1;
 311
 312         pmu_intr_mask = PMU_INT_PCEJECT |
 313                         PMU_INT_SNDBRT |
 314                         PMU_INT_ADB |
 315                         PMU_INT_TICK;
 316
 317         if (of_node_name_eq(vias->parent, "ohare") ||
 318             of_device_is_compatible(vias->parent, "ohare"))
 319                 pmu_kind = PMU_OHARE_BASED;
 320         else if (of_device_is_compatible(vias->parent, "paddington"))
 321                 pmu_kind = PMU_PADDINGTON_BASED;
 322         else if (of_device_is_compatible(vias->parent, "heathrow"))
 323                 pmu_kind = PMU_HEATHROW_BASED;
 324         else if (of_device_is_compatible(vias->parent, "Keylargo")
 325                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 326                 struct device_node *gpiop;
 327                 struct device_node *adbp;
 328                 u64 gaddr = OF_BAD_ADDR;
 329
 330                 pmu_kind = PMU_KEYLARGO_BASED;
 331                 adbp = of_find_node_by_type(NULL, "adb");
 332                 pmu_has_adb = (adbp != NULL);
 333                 of_node_put(adbp);
 334                 pmu_intr_mask = PMU_INT_PCEJECT |
 335                                 PMU_INT_SNDBRT |
 336                                 PMU_INT_ADB |
 337                                 PMU_INT_TICK |
 338                                 PMU_INT_ENVIRONMENT;
 339
 340                 gpiop = of_find_node_by_name(NULL, "gpio");
 341                 if (gpiop) {
 342                         reg = of_get_property(gpiop, "reg", NULL);
 343                         if (reg)
 344                                 gaddr = of_translate_address(gpiop, reg);
 345                         if (gaddr != OF_BAD_ADDR)
 346                                 gpio_reg = ioremap(gaddr, 0x10);
 347                         of_node_put(gpiop);
 348                 }
 349                 if (gpio_reg == NULL) {
 350                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 351                         goto fail;
 352                 }
 353         } else
 354                 pmu_kind = PMU_UNKNOWN;
 355
 356         via1 = via2 = ioremap(taddr, 0x2000);
 357         if (via1 == NULL) {
 358                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 359                 goto fail_via_remap;
 360         }
 361
 362         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
 363         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
 364
 365         pmu_state = idle;
 366
 367         if (!init_pmu())
 368                 goto fail_init;
 369
 370         sys_ctrler = SYS_CTRLER_PMU;
 371
 372         return 1;
 373
 374  fail_init:
 375         iounmap(via1);
 376         via1 = via2 = NULL;
 377  fail_via_remap:
 378         iounmap(gpio_reg);
 379         gpio_reg = NULL;
 380  fail:
 381         of_node_put(vias);
 382         vias = NULL;
 383         pmu_state = uninitialized;
 384         return 0;
 385 #else
 386         if (macintosh_config->adb_type != MAC_ADB_PB2)
 387                 return 0;
 388
 389         pmu_kind = PMU_UNKNOWN;
 390
 391         spin_lock_init(&pmu_lock);
 392
 393         pmu_has_adb = 1;
 394
 395         pmu_intr_mask = PMU_INT_PCEJECT |
 396                         PMU_INT_SNDBRT |
 397                         PMU_INT_ADB |
 398                         PMU_INT_TICK;
 399
 400         pmu_state = idle;
 401
 402         if (!init_pmu()) {
 403                 pmu_state = uninitialized;
 404                 return 0;
 405         }
 406
 407         return 1;
 408 #endif /* !CONFIG_PPC_PMAC */
 409 }
 410
 411 #ifdef CONFIG_ADB
 412 static int pmu_probe(void)
 413 {
 414         return pmu_state == uninitialized ? -ENODEV : 0;
 415 }
 416
 417 static int pmu_init(void)
 418 {
 419         return pmu_state == uninitialized ? -ENODEV : 0;
 420 }
 421 #endif /* CONFIG_ADB */
 422
 423 /*
 424  * We can't wait until pmu_init gets called, that happens too late.
 425  * It happens after IDE and SCSI initialization, which can take a few
 426  * seconds, and by that time the PMU could have given up on us and
 427  * turned us off.
 428  * Thus this is called with arch_initcall rather than device_initcall.
 429  */
 430 static int __init via_pmu_start(void)
 431 {
 432         unsigned int __maybe_unused irq;
 433
 434         if (pmu_state == uninitialized)
 435                 return -ENODEV;
 436
 437         batt_req.complete = 1;
 438
 439 #ifdef CONFIG_PPC_PMAC
 440         irq = irq_of_parse_and_map(vias, 0);
 441         if (!irq) {
 442                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 443                 return -ENODEV;
 444         }
 445         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 446          * to be disabled between the 2 passes of driver suspend, we
 447          * control our own disabling for that one
 448          */
 449         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 450                         "VIA-PMU", (void *)0)) {
 451                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 452                 return -ENODEV;
 453         }
 454
 455         if (pmu_kind == PMU_KEYLARGO_BASED) {
 456                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 457                 if (gpio_node == NULL)
 458                         gpio_node = of_find_node_by_name(NULL,
 459                                                          "pmu-interrupt");
 460                 if (gpio_node)
 461                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 462
 463                 if (gpio_irq) {
 464                         if (request_irq(gpio_irq, gpio1_interrupt,
 465                                         IRQF_NO_SUSPEND, "GPIO1 ADB",
 466                                         (void *)0))
 467                                 printk(KERN_ERR "pmu: can't get irq %d"
 468                                        " (GPIO1)\n", gpio_irq);
 469                         else
 470                                 gpio_irq_enabled = 1;
 471                 }
 472         }
 473
 474         /* Enable interrupts */
 475         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
 476 #else
 477         if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
 478                         "VIA-PMU-SR", NULL)) {
 479                 pr_err("%s: couldn't get SR irq\n", __func__);
 480                 return -ENODEV;
 481         }
 482         if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
 483                         "VIA-PMU-CL", NULL)) {
 484                 pr_err("%s: couldn't get CL irq\n", __func__);
 485                 free_irq(IRQ_MAC_ADB_SR, NULL);
 486                 return -ENODEV;
 487         }
 488 #endif /* !CONFIG_PPC_PMAC */
 489
 490         pmu_fully_inited = 1;
 491
 492         /* Make sure PMU settle down before continuing. This is _very_ important
 493          * since the IDE probe may shut interrupts down for quite a bit of time. If
 494          * a PMU communication is pending while this happens, the PMU may timeout
 495          * Not that on Core99 machines, the PMU keeps sending us environement
 496          * messages, we should find a way to either fix IDE or make it call
 497          * pmu_suspend() before masking interrupts. This can also happens while
 498          * scolling with some fbdevs.
 499          */
 500         do {
 501                 pmu_poll();
 502         } while (pmu_state != idle);
 503
 504         return 0;
 505 }
 506
 507 arch_initcall(via_pmu_start);
 508
 509 /*
 510  * This has to be done after pci_init, which is a subsys_initcall.
 511  */
 512 static int __init via_pmu_dev_init(void)
 513 {
 514         if (pmu_state == uninitialized)
 515                 return -ENODEV;
 516
 517 #ifdef CONFIG_PMAC_BACKLIGHT
 518         /* Initialize backlight */
 519         pmu_backlight_init();
 520 #endif
 521
 522 #ifdef CONFIG_PPC32
 523         if (of_machine_is_compatible("AAPL,3400/2400") ||
 524                 of_machine_is_compatible("AAPL,3500")) {
 525                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 526                         NULL, PMAC_MB_INFO_MODEL, 0);
 527                 pmu_battery_count = 1;
 528                 if (mb == PMAC_TYPE_COMET)
 529                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 530                 else
 531                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 532         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 533                 of_machine_is_compatible("PowerBook1,1")) {
 534                 pmu_battery_count = 2;
 535                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 536                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 537         } else {
 538                 struct device_node* prim =
 539                         of_find_node_by_name(NULL, "power-mgt");
 540                 const u32 *prim_info = NULL;
 541                 if (prim)
 542                         prim_info = of_get_property(prim, "prim-info", NULL);
 543                 if (prim_info) {
 544                         /* Other stuffs here yet unknown */
 545                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 546                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 547                         if (pmu_battery_count > 1)
 548                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 549                 }
 550                 of_node_put(prim);
 551         }
 552 #endif /* CONFIG_PPC32 */
 553
 554         /* Create /proc/pmu */
 555         proc_pmu_root = proc_mkdir("pmu", NULL);
 556         if (proc_pmu_root) {
 557                 long i;
 558
 559                 for (i=0; i<pmu_battery_count; i++) {
 560                         char title[16];
 561                         sprintf(title, "battery_%ld", i);
 562                         proc_pmu_batt[i] = proc_create_single_data(title, 0,
 563                                         proc_pmu_root, pmu_battery_proc_show,
 564                                         (void *)i);
 565                 }
 566
 567                 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
 568                                 pmu_info_proc_show);
 569                 proc_pmu_irqstats = proc_create_single("interrupts", 0,
 570                                 proc_pmu_root, pmu_irqstats_proc_show);
 571                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 572                                                 &pmu_options_proc_ops);
 573         }
 574         return 0;
 575 }
 576
 577 device_initcall(via_pmu_dev_init);
 578
 579 static int
 580 init_pmu(void)
 581 {
 582         int timeout;
 583         struct adb_request req;
 584
 585         /* Negate TREQ. Set TACK to input and TREQ to output. */
 586         out_8(&via2[B], in_8(&via2[B]) | TREQ);
 587         out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
 588
 589         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 590         timeout =  100000;
 591         while (!req.complete) {
 592                 if (--timeout < 0) {
 593                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 594                         return 0;
 595                 }
 596                 udelay(10);
 597                 pmu_poll();
 598         }
 599
 600         /* ack all pending interrupts */
 601         timeout = 100000;
 602         interrupt_data[0][0] = 1;
 603         while (interrupt_data[0][0] || pmu_state != idle) {
 604                 if (--timeout < 0) {
 605                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 606                         return 0;
 607                 }
 608                 if (pmu_state == idle)
 609                         adb_int_pending = 1;
 610                 via_pmu_interrupt(0, NULL);
 611                 udelay(10);
 612         }
 613
 614         /* Tell PMU we are ready.  */
 615         if (pmu_kind == PMU_KEYLARGO_BASED) {
 616                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 617                 while (!req.complete)
 618                         pmu_poll();
 619         }
 620
 621         /* Read PMU version */
 622         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 623         pmu_wait_complete(&req);
 624         if (req.reply_len > 0)
 625                 pmu_version = req.reply[0];
 626
 627         /* Read server mode setting */
 628         if (pmu_kind == PMU_KEYLARGO_BASED) {
 629                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 630                             PMU_PWR_GET_POWERUP_EVENTS);
 631                 pmu_wait_complete(&req);
 632                 if (req.reply_len == 2) {
 633                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 634                                 option_server_mode = 1;
 635                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 636                                option_server_mode ? "enabled" : "disabled");
 637                 }
 638         }
 639
 640         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 641                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 642
 643         return 1;
 644 }
 645
 646 int
 647 pmu_get_model(void)
 648 {
 649         return pmu_kind;
 650 }
 651
 652 static void pmu_set_server_mode(int server_mode)
 653 {
 654         struct adb_request req;
 655
 656         if (pmu_kind != PMU_KEYLARGO_BASED)
 657                 return;
 658
 659         option_server_mode = server_mode;
 660         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 661         pmu_wait_complete(&req);
 662         if (req.reply_len < 2)
 663                 return;
 664         if (server_mode)
 665                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 666                             PMU_PWR_SET_POWERUP_EVENTS,
 667                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 668         else
 669                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 670                             PMU_PWR_CLR_POWERUP_EVENTS,
 671                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 672         pmu_wait_complete(&req);
 673 }
 674
 675 /* This new version of the code for 2400/3400/3500 powerbooks
 676  * is inspired from the implementation in gkrellm-pmu
 677  */
 678 static void
 679 done_battery_state_ohare(struct adb_request* req)
 680 {
 681 #ifdef CONFIG_PPC_PMAC
 682         /* format:
 683          *  [0]    :  flags
 684          *    0x01 :  AC indicator
 685          *    0x02 :  charging
 686          *    0x04 :  battery exist
 687          *    0x08 :
 688          *    0x10 :
 689          *    0x20 :  full charged
 690          *    0x40 :  pcharge reset
 691          *    0x80 :  battery exist
 692          *
 693          *  [1][2] :  battery voltage
 694          *  [3]    :  CPU temperature
 695          *  [4]    :  battery temperature
 696          *  [5]    :  current
 697          *  [6][7] :  pcharge
 698          *              --tkoba
 699          */
 700         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 701         long pcharge, charge, vb, vmax, lmax;
 702         long vmax_charging, vmax_charged;
 703         long amperage, voltage, time, max;
 704         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 705                         NULL, PMAC_MB_INFO_MODEL, 0);
 706
 707         if (req->reply[0] & 0x01)
 708                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 709         else
 710                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 711
 712         if (mb == PMAC_TYPE_COMET) {
 713                 vmax_charged = 189;
 714                 vmax_charging = 213;
 715                 lmax = 6500;
 716         } else {
 717                 vmax_charged = 330;
 718                 vmax_charging = 330;
 719                 lmax = 6500;
 720         }
 721         vmax = vmax_charged;
 722
 723         /* If battery installed */
 724         if (req->reply[0] & 0x04) {
 725                 bat_flags |= PMU_BATT_PRESENT;
 726                 if (req->reply[0] & 0x02)
 727                         bat_flags |= PMU_BATT_CHARGING;
 728                 vb = (req->reply[1] << 8) | req->reply[2];
 729                 voltage = (vb * 265 + 72665) / 10;
 730                 amperage = req->reply[5];
 731                 if ((req->reply[0] & 0x01) == 0) {
 732                         if (amperage > 200)
 733                                 vb += ((amperage - 200) * 15)/100;
 734                 } else if (req->reply[0] & 0x02) {
 735                         vb = (vb * 97) / 100;
 736                         vmax = vmax_charging;
 737                 }
 738                 charge = (100 * vb) / vmax;
 739                 if (req->reply[0] & 0x40) {
 740                         pcharge = (req->reply[6] << 8) + req->reply[7];
 741                         if (pcharge > lmax)
 742                                 pcharge = lmax;
 743                         pcharge *= 100;
 744                         pcharge = 100 - pcharge / lmax;
 745                         if (pcharge < charge)
 746                                 charge = pcharge;
 747                 }
 748                 if (amperage > 0)
 749                         time = (charge * 16440) / amperage;
 750                 else
 751                         time = 0;
 752                 max = 100;
 753                 amperage = -amperage;
 754         } else
 755                 charge = max = amperage = voltage = time = 0;
 756
 757         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 758         pmu_batteries[pmu_cur_battery].charge = charge;
 759         pmu_batteries[pmu_cur_battery].max_charge = max;
 760         pmu_batteries[pmu_cur_battery].amperage = amperage;
 761         pmu_batteries[pmu_cur_battery].voltage = voltage;
 762         pmu_batteries[pmu_cur_battery].time_remaining = time;
 763 #endif /* CONFIG_PPC_PMAC */
 764
 765         clear_bit(0, &async_req_locks);
 766 }
 767
 768 static void
 769 done_battery_state_smart(struct adb_request* req)
 770 {
 771         /* format:
 772          *  [0] : format of this structure (known: 3,4,5)
 773          *  [1] : flags
 774          *
 775          *  format 3 & 4:
 776          *
 777          *  [2] : charge
 778          *  [3] : max charge
 779          *  [4] : current
 780          *  [5] : voltage
 781          *
 782          *  format 5:
 783          *
 784          *  [2][3] : charge
 785          *  [4][5] : max charge
 786          *  [6][7] : current
 787          *  [8][9] : voltage
 788          */
 789
 790         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 791         int amperage;
 792         unsigned int capa, max, voltage;
 793
 794         if (req->reply[1] & 0x01)
 795                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 796         else
 797                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 798
 799
 800         capa = max = amperage = voltage = 0;
 801
 802         if (req->reply[1] & 0x04) {
 803                 bat_flags |= PMU_BATT_PRESENT;
 804                 switch(req->reply[0]) {
 805                         case 3:
 806                         case 4: capa = req->reply[2];
 807                                 max = req->reply[3];
 808                                 amperage = *((signed char *)&req->reply[4]);
 809                                 voltage = req->reply[5];
 810                                 break;
 811                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 812                                 max = (req->reply[4] << 8) | req->reply[5];
 813                                 amperage = *((signed short *)&req->reply[6]);
 814                                 voltage = (req->reply[8] << 8) | req->reply[9];
 815                                 break;
 816                         default:
 817                                 pr_warn("pmu.c: unrecognized battery info, "
 818                                         "len: %d, %4ph\n", req->reply_len,
 819                                                            req->reply);
 820                                 break;
 821                 }
 822         }
 823
 824         if ((req->reply[1] & 0x01) && (amperage > 0))
 825                 bat_flags |= PMU_BATT_CHARGING;
 826
 827         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 828         pmu_batteries[pmu_cur_battery].charge = capa;
 829         pmu_batteries[pmu_cur_battery].max_charge = max;
 830         pmu_batteries[pmu_cur_battery].amperage = amperage;
 831         pmu_batteries[pmu_cur_battery].voltage = voltage;
 832         if (amperage) {
 833                 if ((req->reply[1] & 0x01) && (amperage > 0))
 834                         pmu_batteries[pmu_cur_battery].time_remaining
 835                                 = ((max-capa) * 3600) / amperage;
 836                 else
 837                         pmu_batteries[pmu_cur_battery].time_remaining
 838                                 = (capa * 3600) / (-amperage);
 839         } else
 840                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 841
 842         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 843
 844         clear_bit(0, &async_req_locks);
 845 }
 846
 847 static void
 848 query_battery_state(void)
 849 {
 850         if (test_and_set_bit(0, &async_req_locks))
 851                 return;
 852         if (pmu_kind == PMU_OHARE_BASED)
 853                 pmu_request(&batt_req, done_battery_state_ohare,
 854                         1, PMU_BATTERY_STATE);
 855         else
 856                 pmu_request(&batt_req, done_battery_state_smart,
 857                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 858 }
 859
 860 static int pmu_info_proc_show(struct seq_file *m, void *v)
 861 {
 862         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 863         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 864         seq_printf(m, "AC Power               : %d\n",
 865                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 866         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 867
 868         return 0;
 869 }
 870
 871 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 872 {
 873         int i;
 874         static const char *irq_names[NUM_IRQ_STATS] = {
 875                 "Unknown interrupt (type 0)",
 876                 "Unknown interrupt (type 1)",
 877                 "PC-Card eject button",
 878                 "Sound/Brightness button",
 879                 "ADB message",
 880                 "Battery state change",
 881                 "Environment interrupt",
 882                 "Tick timer",
 883                 "Ghost interrupt (zero len)",
 884                 "Empty interrupt (empty mask)",
 885                 "Max irqs in a row",
 886                 "Total CB1 triggered events",
 887                 "Total GPIO1 triggered events",
 888         };
 889
 890         for (i = 0; i < NUM_IRQ_STATS; i++) {
 891                 seq_printf(m, " %2u: %10u (%s)\n",
 892                              i, pmu_irq_stats[i], irq_names[i]);
 893         }
 894         return 0;
 895 }
 896
 897 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 898 {
 899         long batnum = (long)m->private;
 900
 901         seq_putc(m, '\n');
 902         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 903         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 904         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 905         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 906         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 907         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 908         return 0;
 909 }
 910
 911 static int pmu_options_proc_show(struct seq_file *m, void *v)
 912 {
 913 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 914         if (pmu_kind == PMU_KEYLARGO_BASED &&
 915             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 916                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 917 #endif
 918         if (pmu_kind == PMU_KEYLARGO_BASED)
 919                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 920
 921         return 0;
 922 }
 923
 924 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 925 {
 926         return single_open(file, pmu_options_proc_show, NULL);
 927 }
 928
 929 static ssize_t pmu_options_proc_write(struct file *file,
 930                 const char __user *buffer, size_t count, loff_t *pos)
 931 {
 932         char tmp[33];
 933         char *label, *val;
 934         size_t fcount = count;
 935
 936         if (!count)
 937                 return -EINVAL;
 938         if (count > 32)
 939                 count = 32;
 940         if (copy_from_user(tmp, buffer, count))
 941                 return -EFAULT;
 942         tmp[count] = 0;
 943
 944         label = tmp;
 945         while(*label == ' ')
 946                 label++;
 947         val = label;
 948         while(*val && (*val != '=')) {
 949                 if (*val == ' ')
 950                         *val = 0;
 951                 val++;
 952         }
 953         if ((*val) == 0)
 954                 return -EINVAL;
 955         *(val++) = 0;
 956         while(*val == ' ')
 957                 val++;
 958 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 959         if (pmu_kind == PMU_KEYLARGO_BASED &&
 960             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 961                 if (!strcmp(label, "lid_wakeup"))
 962                         option_lid_wakeup = ((*val) == '1');
 963 #endif
 964         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 965                 int new_value;
 966                 new_value = ((*val) == '1');
 967                 if (new_value != option_server_mode)
 968                         pmu_set_server_mode(new_value);
 969         }
 970         return fcount;
 971 }
 972
 973 static const struct proc_ops pmu_options_proc_ops = {
 974         .proc_open      = pmu_options_proc_open,
 975         .proc_read      = seq_read,
 976         .proc_lseek     = seq_lseek,
 977         .proc_release   = single_release,
 978         .proc_write     = pmu_options_proc_write,
 979 };
 980
 981 #ifdef CONFIG_ADB
 982 /* Send an ADB command */
 983 static int pmu_send_request(struct adb_request *req, int sync)
 984 {
 985         int i, ret;
 986
 987         if (pmu_state == uninitialized || !pmu_fully_inited) {
 988                 req->complete = 1;
 989                 return -ENXIO;
 990         }
 991
 992         ret = -EINVAL;
 993
 994         switch (req->data[0]) {
 995         case PMU_PACKET:
 996                 for (i = 0; i < req->nbytes - 1; ++i)
 997                         req->data[i] = req->data[i+1];
 998                 --req->nbytes;
 999                 if (pmu_data_len[req->data[0]][1] != 0) {
1000                         req->reply[0] = ADB_RET_OK;
1001                         req->reply_len = 1;
1002                 } else
1003                         req->reply_len = 0;
1004                 ret = pmu_queue_request(req);
1005                 break;
1006         case CUDA_PACKET:
1007                 switch (req->data[1]) {
1008                 case CUDA_GET_TIME:
1009                         if (req->nbytes != 2)
1010                                 break;
1011                         req->data[0] = PMU_READ_RTC;
1012                         req->nbytes = 1;
1013                         req->reply_len = 3;
1014                         req->reply[0] = CUDA_PACKET;
1015                         req->reply[1] = 0;
1016                         req->reply[2] = CUDA_GET_TIME;
1017                         ret = pmu_queue_request(req);
1018                         break;
1019                 case CUDA_SET_TIME:
1020                         if (req->nbytes != 6)
1021                                 break;
1022                         req->data[0] = PMU_SET_RTC;
1023                         req->nbytes = 5;
1024                         for (i = 1; i <= 4; ++i)
1025                                 req->data[i] = req->data[i+1];
1026                         req->reply_len = 3;
1027                         req->reply[0] = CUDA_PACKET;
1028                         req->reply[1] = 0;
1029                         req->reply[2] = CUDA_SET_TIME;
1030                         ret = pmu_queue_request(req);
1031                         break;
1032                 }
1033                 break;
1034         case ADB_PACKET:
1035                 if (!pmu_has_adb)
1036                         return -ENXIO;
1037                 for (i = req->nbytes - 1; i > 1; --i)
1038                         req->data[i+2] = req->data[i];
1039                 req->data[3] = req->nbytes - 2;
1040                 req->data[2] = pmu_adb_flags;
1041                 /*req->data[1] = req->data[1];*/
1042                 req->data[0] = PMU_ADB_CMD;
1043                 req->nbytes += 2;
1044                 req->reply_expected = 1;
1045                 req->reply_len = 0;
1046                 ret = pmu_queue_request(req);
1047                 break;
1048         }
1049         if (ret) {
1050                 req->complete = 1;
1051                 return ret;
1052         }
1053
1054         if (sync)
1055                 while (!req->complete)
1056                         pmu_poll();
1057
1058         return 0;
1059 }
1060
1061 /* Enable/disable autopolling */
1062 static int __pmu_adb_autopoll(int devs)
1063 {
1064         struct adb_request req;
1065
1066         if (devs) {
1067                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1068                             adb_dev_map >> 8, adb_dev_map);
1069                 pmu_adb_flags = 2;
1070         } else {
1071                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1072                 pmu_adb_flags = 0;
1073         }
1074         while (!req.complete)
1075                 pmu_poll();
1076         return 0;
1077 }
1078
1079 static int pmu_adb_autopoll(int devs)
1080 {
1081         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1082                 return -ENXIO;
1083
1084         adb_dev_map = devs;
1085         return __pmu_adb_autopoll(devs);
1086 }
1087
1088 /* Reset the ADB bus */
1089 static int pmu_adb_reset_bus(void)
1090 {
1091         struct adb_request req;
1092         int save_autopoll = adb_dev_map;
1093
1094         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1095                 return -ENXIO;
1096
1097         /* anyone got a better idea?? */
1098         __pmu_adb_autopoll(0);
1099
1100         req.nbytes = 4;
1101         req.done = NULL;
1102         req.data[0] = PMU_ADB_CMD;
1103         req.data[1] = ADB_BUSRESET;
1104         req.data[2] = 0;
1105         req.data[3] = 0;
1106         req.data[4] = 0;
1107         req.reply_len = 0;
1108         req.reply_expected = 1;
1109         if (pmu_queue_request(&req) != 0) {
1110                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1111                 return -EIO;
1112         }
1113         pmu_wait_complete(&req);
1114
1115         if (save_autopoll != 0)
1116                 __pmu_adb_autopoll(save_autopoll);
1117
1118         return 0;
1119 }
1120 #endif /* CONFIG_ADB */
1121
1122 /* Construct and send a pmu request */
1123 int
1124 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1125             int nbytes, ...)
1126 {
1127         va_list list;
1128         int i;
1129
1130         if (pmu_state == uninitialized)
1131                 return -ENXIO;
1132
1133         if (nbytes < 0 || nbytes > 32) {
1134                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1135                 req->complete = 1;
1136                 return -EINVAL;
1137         }
1138         req->nbytes = nbytes;
1139         req->done = done;
1140         va_start(list, nbytes);
1141         for (i = 0; i < nbytes; ++i)
1142                 req->data[i] = va_arg(list, int);
1143         va_end(list);
1144         req->reply_len = 0;
1145         req->reply_expected = 0;
1146         return pmu_queue_request(req);
1147 }
1148
1149 int
1150 pmu_queue_request(struct adb_request *req)
1151 {
1152         unsigned long flags;
1153         int nsend;
1154
1155         if (pmu_state == uninitialized) {
1156                 req->complete = 1;
1157                 return -ENXIO;
1158         }
1159         if (req->nbytes <= 0) {
1160                 req->complete = 1;
1161                 return 0;
1162         }
1163         nsend = pmu_data_len[req->data[0]][0];
1164         if (nsend >= 0 && req->nbytes != nsend + 1) {
1165                 req->complete = 1;
1166                 return -EINVAL;
1167         }
1168
1169         req->next = NULL;
1170         req->sent = 0;
1171         req->complete = 0;
1172
1173         spin_lock_irqsave(&pmu_lock, flags);
1174         if (current_req) {
1175                 last_req->next = req;
1176                 last_req = req;
1177         } else {
1178                 current_req = req;
1179                 last_req = req;
1180                 if (pmu_state == idle)
1181                         pmu_start();
1182         }
1183         spin_unlock_irqrestore(&pmu_lock, flags);
1184
1185         return 0;
1186 }
1187
1188 static inline void
1189 wait_for_ack(void)
1190 {
1191         /* Sightly increased the delay, I had one occurrence of the message
1192          * reported
1193          */
1194         int timeout = 4000;
1195         while ((in_8(&via2[B]) & TACK) == 0) {
1196                 if (--timeout < 0) {
1197                         printk(KERN_ERR "PMU not responding (!ack)\n");
1198                         return;
1199                 }
1200                 udelay(10);
1201         }
1202 }
1203
1204 /* New PMU seems to be very sensitive to those timings, so we make sure
1205  * PCI is flushed immediately */
1206 static inline void
1207 send_byte(int x)
1208 {
1209         out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1210         out_8(&via1[SR], x);
1211         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);        /* assert TREQ */
1212         (void)in_8(&via2[B]);
1213 }
1214
1215 static inline void
1216 recv_byte(void)
1217 {
1218         out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1219         in_8(&via1[SR]);                /* resets SR */
1220         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1221         (void)in_8(&via2[B]);
1222 }
1223
1224 static inline void
1225 pmu_done(struct adb_request *req)
1226 {
1227         void (*done)(struct adb_request *) = req->done;
1228         mb();
1229         req->complete = 1;
1230         /* Here, we assume that if the request has a done member, the
1231          * struct request will survive to setting req->complete to 1
1232          */
1233         if (done)
1234                 (*done)(req);
1235 }
1236
1237 static void
1238 pmu_start(void)
1239 {
1240         struct adb_request *req;
1241
1242         /* assert pmu_state == idle */
1243         /* get the packet to send */
1244         req = current_req;
1245         if (!req || pmu_state != idle
1246             || (/*req->reply_expected && */req_awaiting_reply))
1247                 return;
1248
1249         pmu_state = sending;
1250         data_index = 1;
1251         data_len = pmu_data_len[req->data[0]][0];
1252
1253         /* Sounds safer to make sure ACK is high before writing. This helped
1254          * kill a problem with ADB and some iBooks
1255          */
1256         wait_for_ack();
1257         /* set the shift register to shift out and send a byte */
1258         send_byte(req->data[0]);
1259 }
1260
1261 void
1262 pmu_poll(void)
1263 {
1264         if (pmu_state == uninitialized)
1265                 return;
1266         if (disable_poll)
1267                 return;
1268         via_pmu_interrupt(0, NULL);
1269 }
1270
1271 void
1272 pmu_poll_adb(void)
1273 {
1274         if (pmu_state == uninitialized)
1275                 return;
1276         if (disable_poll)
1277                 return;
1278         /* Kicks ADB read when PMU is suspended */
1279         adb_int_pending = 1;
1280         do {
1281                 via_pmu_interrupt(0, NULL);
1282         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1283                 || req_awaiting_reply));
1284 }
1285
1286 void
1287 pmu_wait_complete(struct adb_request *req)
1288 {
1289         if (pmu_state == uninitialized)
1290                 return;
1291         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1292                 via_pmu_interrupt(0, NULL);
1293 }
1294
1295 /* This function loops until the PMU is idle and prevents it from
1296  * anwsering to ADB interrupts. pmu_request can still be called.
1297  * This is done to avoid spurrious shutdowns when we know we'll have
1298  * interrupts switched off for a long time
1299  */
1300 void
1301 pmu_suspend(void)
1302 {
1303         unsigned long flags;
1304
1305         if (pmu_state == uninitialized)
1306                 return;
1307
1308         spin_lock_irqsave(&pmu_lock, flags);
1309         pmu_suspended++;
1310         if (pmu_suspended > 1) {
1311                 spin_unlock_irqrestore(&pmu_lock, flags);
1312                 return;
1313         }
1314
1315         do {
1316                 spin_unlock_irqrestore(&pmu_lock, flags);
1317                 if (req_awaiting_reply)
1318                         adb_int_pending = 1;
1319                 via_pmu_interrupt(0, NULL);
1320                 spin_lock_irqsave(&pmu_lock, flags);
1321                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1322                         if (gpio_irq >= 0)
1323                                 disable_irq_nosync(gpio_irq);
1324                         out_8(&via1[IER], CB1_INT | IER_CLR);
1325                         spin_unlock_irqrestore(&pmu_lock, flags);
1326                         break;
1327                 }
1328         } while (1);
1329 }
1330
1331 void
1332 pmu_resume(void)
1333 {
1334         unsigned long flags;
1335
1336         if (pmu_state == uninitialized || pmu_suspended < 1)
1337                 return;
1338
1339         spin_lock_irqsave(&pmu_lock, flags);
1340         pmu_suspended--;
1341         if (pmu_suspended > 0) {
1342                 spin_unlock_irqrestore(&pmu_lock, flags);
1343                 return;
1344         }
1345         adb_int_pending = 1;
1346         if (gpio_irq >= 0)
1347                 enable_irq(gpio_irq);
1348         out_8(&via1[IER], CB1_INT | IER_SET);
1349         spin_unlock_irqrestore(&pmu_lock, flags);
1350         pmu_poll();
1351 }
1352
1353 /* Interrupt data could be the result data from an ADB cmd */
1354 static void
1355 pmu_handle_data(unsigned char *data, int len)
1356 {
1357         unsigned char ints;
1358         int idx;
1359         int i = 0;
1360
1361         asleep = 0;
1362         if (drop_interrupts || len < 1) {
1363                 adb_int_pending = 0;
1364                 pmu_irq_stats[8]++;
1365                 return;
1366         }
1367
1368         /* Get PMU interrupt mask */
1369         ints = data[0];
1370
1371         /* Record zero interrupts for stats */
1372         if (ints == 0)
1373                 pmu_irq_stats[9]++;
1374
1375         /* Hack to deal with ADB autopoll flag */
1376         if (ints & PMU_INT_ADB)
1377                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1378
1379 next:
1380         if (ints == 0) {
1381                 if (i > pmu_irq_stats[10])
1382                         pmu_irq_stats[10] = i;
1383                 return;
1384         }
1385         i++;
1386
1387         idx = ffs(ints) - 1;
1388         ints &= ~BIT(idx);
1389
1390         pmu_irq_stats[idx]++;
1391
1392         /* Note: for some reason, we get an interrupt with len=1,
1393          * data[0]==0 after each normal ADB interrupt, at least
1394          * on the Pismo. Still investigating...  --BenH
1395          */
1396         switch (BIT(idx)) {
1397         case PMU_INT_ADB:
1398                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1399                         struct adb_request *req = req_awaiting_reply;
1400                         if (!req) {
1401                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1402                                 return;
1403                         }
1404                         req_awaiting_reply = NULL;
1405                         if (len <= 2)
1406                                 req->reply_len = 0;
1407                         else {
1408                                 memcpy(req->reply, data + 1, len - 1);
1409                                 req->reply_len = len - 1;
1410                         }
1411                         pmu_done(req);
1412                 } else {
1413 #ifdef CONFIG_XMON
1414                         if (len == 4 && data[1] == 0x2c) {
1415                                 extern int xmon_wants_key, xmon_adb_keycode;
1416                                 if (xmon_wants_key) {
1417                                         xmon_adb_keycode = data[2];
1418                                         return;
1419                                 }
1420                         }
1421 #endif /* CONFIG_XMON */
1422 #ifdef CONFIG_ADB
1423                         /*
1424                          * XXX On the [23]400 the PMU gives us an up
1425                          * event for keycodes 0x74 or 0x75 when the PC
1426                          * card eject buttons are released, so we
1427                          * ignore those events.
1428                          */
1429                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1430                               && data[1] == 0x2c && data[3] == 0xff
1431                               && (data[2] & ~1) == 0xf4))
1432                                 adb_input(data+1, len-1, 1);
1433 #endif /* CONFIG_ADB */
1434                 }
1435                 break;
1436
1437         /* Sound/brightness button pressed */
1438         case PMU_INT_SNDBRT:
1439 #ifdef CONFIG_PMAC_BACKLIGHT
1440                 if (len == 3)
1441                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1442 #endif
1443                 break;
1444
1445         /* Tick interrupt */
1446         case PMU_INT_TICK:
1447                 /* Environment or tick interrupt, query batteries */
1448                 if (pmu_battery_count) {
1449                         if ((--query_batt_timer) == 0) {
1450                                 query_battery_state();
1451                                 query_batt_timer = BATTERY_POLLING_COUNT;
1452                         }
1453                 }
1454                 break;
1455
1456         case PMU_INT_ENVIRONMENT:
1457                 if (pmu_battery_count)
1458                         query_battery_state();
1459                 pmu_pass_intr(data, len);
1460                 /* len == 6 is probably a bad check. But how do I
1461                  * know what PMU versions send what events here? */
1462                 if (len == 6) {
1463                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1464                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1465                 }
1466                 break;
1467
1468         default:
1469                pmu_pass_intr(data, len);
1470         }
1471         goto next;
1472 }
1473
1474 static struct adb_request*
1475 pmu_sr_intr(void)
1476 {
1477         struct adb_request *req;
1478         int bite = 0;
1479
1480         if (in_8(&via2[B]) & TREQ) {
1481                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1482                 return NULL;
1483         }
1484         /* The ack may not yet be low when we get the interrupt */
1485         while ((in_8(&via2[B]) & TACK) != 0)
1486                         ;
1487
1488         /* if reading grab the byte, and reset the interrupt */
1489         if (pmu_state == reading || pmu_state == reading_intr)
1490                 bite = in_8(&via1[SR]);
1491
1492         /* reset TREQ and wait for TACK to go high */
1493         out_8(&via2[B], in_8(&via2[B]) | TREQ);
1494         wait_for_ack();
1495
1496         switch (pmu_state) {
1497         case sending:
1498                 req = current_req;
1499                 if (data_len < 0) {
1500                         data_len = req->nbytes - 1;
1501                         send_byte(data_len);
1502                         break;
1503                 }
1504                 if (data_index <= data_len) {
1505                         send_byte(req->data[data_index++]);
1506                         break;
1507                 }
1508                 req->sent = 1;
1509                 data_len = pmu_data_len[req->data[0]][1];
1510                 if (data_len == 0) {
1511                         pmu_state = idle;
1512                         current_req = req->next;
1513                         if (req->reply_expected)
1514                                 req_awaiting_reply = req;
1515                         else
1516                                 return req;
1517                 } else {
1518                         pmu_state = reading;
1519                         data_index = 0;
1520                         reply_ptr = req->reply + req->reply_len;
1521                         recv_byte();
1522                 }
1523                 break;
1524
1525         case intack:
1526                 data_index = 0;
1527                 data_len = -1;
1528                 pmu_state = reading_intr;
1529                 reply_ptr = interrupt_data[int_data_last];
1530                 recv_byte();
1531                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1532                         enable_irq(gpio_irq);
1533                         gpio_irq_enabled = 1;
1534                 }
1535                 break;
1536
1537         case reading:
1538         case reading_intr:
1539                 if (data_len == -1) {
1540                         data_len = bite;
1541                         if (bite > 32)
1542                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1543                 } else if (data_index < 32) {
1544                         reply_ptr[data_index++] = bite;
1545                 }
1546                 if (data_index < data_len) {
1547                         recv_byte();
1548                         break;
1549                 }
1550
1551                 if (pmu_state == reading_intr) {
1552                         pmu_state = idle;
1553                         int_data_state[int_data_last] = int_data_ready;
1554                         interrupt_data_len[int_data_last] = data_len;
1555                 } else {
1556                         req = current_req;
1557                         /*
1558                          * For PMU sleep and freq change requests, we lock the
1559                          * PMU until it's explicitly unlocked. This avoids any
1560                          * spurrious event polling getting in
1561                          */
1562                         current_req = req->next;
1563                         req->reply_len += data_index;
1564                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1565                                 pmu_state = locked;
1566                         else
1567                                 pmu_state = idle;
1568                         return req;
1569                 }
1570                 break;
1571
1572         default:
1573                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1574                        pmu_state);
1575         }
1576         return NULL;
1577 }
1578
1579 static irqreturn_t
1580 via_pmu_interrupt(int irq, void *arg)
1581 {
1582         unsigned long flags;
1583         int intr;
1584         int nloop = 0;
1585         int int_data = -1;
1586         struct adb_request *req = NULL;
1587         int handled = 0;
1588
1589         /* This is a bit brutal, we can probably do better */
1590         spin_lock_irqsave(&pmu_lock, flags);
1591         ++disable_poll;
1592
1593         for (;;) {
1594                 /* On 68k Macs, VIA interrupts are dispatched individually.
1595                  * Unless we are polling, the relevant IRQ flag has already
1596                  * been cleared.
1597                  */
1598                 intr = 0;
1599                 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1600                         intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1601                         out_8(&via1[IFR], intr);
1602                 }
1603 #ifndef CONFIG_PPC_PMAC
1604                 switch (irq) {
1605                 case IRQ_MAC_ADB_CL:
1606                         intr = CB1_INT;
1607                         break;
1608                 case IRQ_MAC_ADB_SR:
1609                         intr = SR_INT;
1610                         break;
1611                 }
1612 #endif
1613                 if (intr == 0)
1614                         break;
1615                 handled = 1;
1616                 if (++nloop > 1000) {
1617                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1618                                "intr=%x, ier=%x pmu_state=%d\n",
1619                                intr, in_8(&via1[IER]), pmu_state);
1620                         break;
1621                 }
1622                 if (intr & CB1_INT) {
1623                         adb_int_pending = 1;
1624                         pmu_irq_stats[11]++;
1625                 }
1626                 if (intr & SR_INT) {
1627                         req = pmu_sr_intr();
1628                         if (req)
1629                                 break;
1630                 }
1631 #ifndef CONFIG_PPC_PMAC
1632                 break;
1633 #endif
1634         }
1635
1636 recheck:
1637         if (pmu_state == idle) {
1638                 if (adb_int_pending) {
1639                         if (int_data_state[0] == int_data_empty)
1640                                 int_data_last = 0;
1641                         else if (int_data_state[1] == int_data_empty)
1642                                 int_data_last = 1;
1643                         else
1644                                 goto no_free_slot;
1645                         pmu_state = intack;
1646                         int_data_state[int_data_last] = int_data_fill;
1647                         /* Sounds safer to make sure ACK is high before writing.
1648                          * This helped kill a problem with ADB and some iBooks
1649                          */
1650                         wait_for_ack();
1651                         send_byte(PMU_INT_ACK);
1652                         adb_int_pending = 0;
1653                 } else if (current_req)
1654                         pmu_start();
1655         }
1656 no_free_slot:
1657         /* Mark the oldest buffer for flushing */
1658         if (int_data_state[!int_data_last] == int_data_ready) {
1659                 int_data_state[!int_data_last] = int_data_flush;
1660                 int_data = !int_data_last;
1661         } else if (int_data_state[int_data_last] == int_data_ready) {
1662                 int_data_state[int_data_last] = int_data_flush;
1663                 int_data = int_data_last;
1664         }
1665         --disable_poll;
1666         spin_unlock_irqrestore(&pmu_lock, flags);
1667
1668         /* Deal with completed PMU requests outside of the lock */
1669         if (req) {
1670                 pmu_done(req);
1671                 req = NULL;
1672         }
1673
1674         /* Deal with interrupt datas outside of the lock */
1675         if (int_data >= 0) {
1676                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1677                 spin_lock_irqsave(&pmu_lock, flags);
1678                 ++disable_poll;
1679                 int_data_state[int_data] = int_data_empty;
1680                 int_data = -1;
1681                 goto recheck;
1682         }
1683
1684         return IRQ_RETVAL(handled);
1685 }
1686
1687 void
1688 pmu_unlock(void)
1689 {
1690         unsigned long flags;
1691
1692         spin_lock_irqsave(&pmu_lock, flags);
1693         if (pmu_state == locked)
1694                 pmu_state = idle;
1695         adb_int_pending = 1;
1696         spin_unlock_irqrestore(&pmu_lock, flags);
1697 }
1698
1699
1700 static __maybe_unused irqreturn_t
1701 gpio1_interrupt(int irq, void *arg)
1702 {
1703         unsigned long flags;
1704
1705         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1706                 spin_lock_irqsave(&pmu_lock, flags);
1707                 if (gpio_irq_enabled > 0) {
1708                         disable_irq_nosync(gpio_irq);
1709                         gpio_irq_enabled = 0;
1710                 }
1711                 pmu_irq_stats[12]++;
1712                 adb_int_pending = 1;
1713                 spin_unlock_irqrestore(&pmu_lock, flags);
1714                 via_pmu_interrupt(0, NULL);
1715                 return IRQ_HANDLED;
1716         }
1717         return IRQ_NONE;
1718 }
1719
1720 void
1721 pmu_enable_irled(int on)
1722 {
1723         struct adb_request req;
1724
1725         if (pmu_state == uninitialized)
1726                 return ;
1727         if (pmu_kind == PMU_KEYLARGO_BASED)
1728                 return ;
1729
1730         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1731             (on ? PMU_POW_ON : PMU_POW_OFF));
1732         pmu_wait_complete(&req);
1733 }
1734
1735 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1736 #define RTC_OFFSET      2082844800
1737
1738 time64_t pmu_get_time(void)
1739 {
1740         struct adb_request req;
1741         u32 now;
1742
1743         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1744                 return 0;
1745         pmu_wait_complete(&req);
1746         if (req.reply_len != 4)
1747                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1748         now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1749               (req.reply[2] << 8) + req.reply[3];
1750         return (time64_t)now - RTC_OFFSET;
1751 }
1752
1753 int pmu_set_rtc_time(struct rtc_time *tm)
1754 {
1755         u32 now;
1756         struct adb_request req;
1757
1758         now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1759         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1760                         now >> 24, now >> 16, now >> 8, now) < 0)
1761                 return -ENXIO;
1762         pmu_wait_complete(&req);
1763         if (req.reply_len != 0)
1764                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1765         return 0;
1766 }
1767
1768 void
1769 pmu_restart(void)
1770 {
1771         struct adb_request req;
1772
1773         if (pmu_state == uninitialized)
1774                 return;
1775
1776         local_irq_disable();
1777
1778         drop_interrupts = 1;
1779
1780         if (pmu_kind != PMU_KEYLARGO_BASED) {
1781                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1782                                                 PMU_INT_TICK );
1783                 while(!req.complete)
1784                         pmu_poll();
1785         }
1786
1787         pmu_request(&req, NULL, 1, PMU_RESET);
1788         pmu_wait_complete(&req);
1789         for (;;)
1790                 ;
1791 }
1792
1793 void
1794 pmu_shutdown(void)
1795 {
1796         struct adb_request req;
1797
1798         if (pmu_state == uninitialized)
1799                 return;
1800
1801         local_irq_disable();
1802
1803         drop_interrupts = 1;
1804
1805         if (pmu_kind != PMU_KEYLARGO_BASED) {
1806                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1807                                                 PMU_INT_TICK );
1808                 pmu_wait_complete(&req);
1809         } else {
1810                 /* Disable server mode on shutdown or we'll just
1811                  * wake up again
1812                  */
1813                 pmu_set_server_mode(0);
1814         }
1815
1816         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1817                     'M', 'A', 'T', 'T');
1818         pmu_wait_complete(&req);
1819         for (;;)
1820                 ;
1821 }
1822
1823 int
1824 pmu_present(void)
1825 {
1826         return pmu_state != uninitialized;
1827 }
1828
1829 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1830 /*
1831  * Put the powerbook to sleep.
1832  */
1833
1834 static u32 save_via[8];
1835 static int __fake_sleep;
1836
1837 static void
1838 save_via_state(void)
1839 {
1840         save_via[0] = in_8(&via1[ANH]);
1841         save_via[1] = in_8(&via1[DIRA]);
1842         save_via[2] = in_8(&via1[B]);
1843         save_via[3] = in_8(&via1[DIRB]);
1844         save_via[4] = in_8(&via1[PCR]);
1845         save_via[5] = in_8(&via1[ACR]);
1846         save_via[6] = in_8(&via1[T1CL]);
1847         save_via[7] = in_8(&via1[T1CH]);
1848 }
1849 static void
1850 restore_via_state(void)
1851 {
1852         out_8(&via1[ANH],  save_via[0]);
1853         out_8(&via1[DIRA], save_via[1]);
1854         out_8(&via1[B],    save_via[2]);
1855         out_8(&via1[DIRB], save_via[3]);
1856         out_8(&via1[PCR],  save_via[4]);
1857         out_8(&via1[ACR],  save_via[5]);
1858         out_8(&via1[T1CL], save_via[6]);
1859         out_8(&via1[T1CH], save_via[7]);
1860         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
1861         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
1862         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1863 }
1864
1865 #define GRACKLE_PM      (1<<7)
1866 #define GRACKLE_DOZE    (1<<5)
1867 #define GRACKLE_NAP     (1<<4)
1868 #define GRACKLE_SLEEP   (1<<3)
1869
1870 static int powerbook_sleep_grackle(void)
1871 {
1872         unsigned long save_l2cr;
1873         unsigned short pmcr1;
1874         struct adb_request req;
1875         struct pci_dev *grackle;
1876
1877         grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1878         if (!grackle)
1879                 return -ENODEV;
1880
1881         /* Turn off various things. Darwin does some retry tests here... */
1882         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1883         pmu_wait_complete(&req);
1884         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1885                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1886         pmu_wait_complete(&req);
1887
1888         /* For 750, save backside cache setting and disable it */
1889         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1890
1891         if (!__fake_sleep) {
1892                 /* Ask the PMU to put us to sleep */
1893                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1894                 pmu_wait_complete(&req);
1895         }
1896
1897         /* The VIA is supposed not to be restored correctly*/
1898         save_via_state();
1899         /* We shut down some HW */
1900         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1901
1902         pci_read_config_word(grackle, 0x70, &pmcr1);
1903         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1904         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1905         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1906         pci_write_config_word(grackle, 0x70, pmcr1);
1907
1908         /* Call low-level ASM sleep handler */
1909         if (__fake_sleep)
1910                 mdelay(5000);
1911         else
1912                 low_sleep_handler();
1913
1914         /* We're awake again, stop grackle PM */
1915         pci_read_config_word(grackle, 0x70, &pmcr1);
1916         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1917         pci_write_config_word(grackle, 0x70, pmcr1);
1918
1919         pci_dev_put(grackle);
1920
1921         /* Make sure the PMU is idle */
1922         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1923         restore_via_state();
1924
1925         /* Restore L2 cache */
1926         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1927                 _set_L2CR(save_l2cr);
1928
1929         /* Restore userland MMU context */
1930         switch_mmu_context(NULL, current->active_mm, NULL);
1931
1932         /* Power things up */
1933         pmu_unlock();
1934         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1935         pmu_wait_complete(&req);
1936         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1937                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1938         pmu_wait_complete(&req);
1939         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1940                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1941         pmu_wait_complete(&req);
1942
1943         return 0;
1944 }
1945
1946 static int
1947 powerbook_sleep_Core99(void)
1948 {
1949         unsigned long save_l2cr;
1950         unsigned long save_l3cr;
1951         struct adb_request req;
1952
1953         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1954                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1955                 return -ENOSYS;
1956         }
1957
1958         if (num_online_cpus() > 1 || cpu_is_offline(0))
1959                 return -EAGAIN;
1960
1961         /* Stop environment and ADB interrupts */
1962         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1963         pmu_wait_complete(&req);
1964
1965         /* Tell PMU what events will wake us up */
1966         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1967                 0xff, 0xff);
1968         pmu_wait_complete(&req);
1969         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1970                 0, PMU_PWR_WAKEUP_KEY |
1971                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1972         pmu_wait_complete(&req);
1973
1974         /* Save the state of the L2 and L3 caches */
1975         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1976         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1977
1978         if (!__fake_sleep) {
1979                 /* Ask the PMU to put us to sleep */
1980                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1981                 pmu_wait_complete(&req);
1982         }
1983
1984         /* The VIA is supposed not to be restored correctly*/
1985         save_via_state();
1986
1987         /* Shut down various ASICs. There's a chance that we can no longer
1988          * talk to the PMU after this, so I moved it to _after_ sending the
1989          * sleep command to it. Still need to be checked.
1990          */
1991         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1992
1993         /* Call low-level ASM sleep handler */
1994         if (__fake_sleep)
1995                 mdelay(5000);
1996         else
1997                 low_sleep_handler();
1998
1999         /* Restore Apple core ASICs state */
2000         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2001
2002         /* Restore VIA */
2003         restore_via_state();
2004
2005         /* tweak LPJ before cpufreq is there */
2006         loops_per_jiffy *= 2;
2007
2008         /* Restore video */
2009         pmac_call_early_video_resume();
2010
2011         /* Restore L2 cache */
2012         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2013                 _set_L2CR(save_l2cr);
2014         /* Restore L3 cache */
2015         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2016                 _set_L3CR(save_l3cr);
2017
2018         /* Restore userland MMU context */
2019         switch_mmu_context(NULL, current->active_mm, NULL);
2020
2021         /* Tell PMU we are ready */
2022         pmu_unlock();
2023         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2024         pmu_wait_complete(&req);
2025         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2026         pmu_wait_complete(&req);
2027
2028         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2029         loops_per_jiffy /= 2;
2030
2031         return 0;
2032 }
2033
2034 #define PB3400_MEM_CTRL         0xf8000000
2035 #define PB3400_MEM_CTRL_SLEEP   0x70
2036
2037 static void __iomem *pb3400_mem_ctrl;
2038
2039 static void powerbook_sleep_init_3400(void)
2040 {
2041         /* map in the memory controller registers */
2042         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2043         if (pb3400_mem_ctrl == NULL)
2044                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2045 }
2046
2047 static int powerbook_sleep_3400(void)
2048 {
2049         int i, x;
2050         unsigned int hid0;
2051         unsigned long msr;
2052         struct adb_request sleep_req;
2053         unsigned int __iomem *mem_ctrl_sleep;
2054
2055         if (pb3400_mem_ctrl == NULL)
2056                 return -ENOMEM;
2057         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2058
2059         /* Set the memory controller to keep the memory refreshed
2060            while we're asleep */
2061         for (i = 0x403f; i >= 0x4000; --i) {
2062                 out_be32(mem_ctrl_sleep, i);
2063                 do {
2064                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2065                 } while (x == 0);
2066                 if (x >= 0x100)
2067                         break;
2068         }
2069
2070         /* Ask the PMU to put us to sleep */
2071         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2072         pmu_wait_complete(&sleep_req);
2073         pmu_unlock();
2074
2075         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2076
2077         asleep = 1;
2078
2079         /* Put the CPU into sleep mode */
2080         hid0 = mfspr(SPRN_HID0);
2081         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2082         mtspr(SPRN_HID0, hid0);
2083         local_irq_enable();
2084         msr = mfmsr() | MSR_POW;
2085         while (asleep) {
2086                 mb();
2087                 mtmsr(msr);
2088                 isync();
2089         }
2090         local_irq_disable();
2091
2092         /* OK, we're awake again, start restoring things */
2093         out_be32(mem_ctrl_sleep, 0x3f);
2094         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2095
2096         return 0;
2097 }
2098
2099 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2100
2101 /*
2102  * Support for /dev/pmu device
2103  */
2104 #define RB_SIZE         0x10
2105 struct pmu_private {
2106         struct list_head list;
2107         int     rb_get;
2108         int     rb_put;
2109         struct rb_entry {
2110                 unsigned short len;
2111                 unsigned char data[16];
2112         }       rb_buf[RB_SIZE];
2113         wait_queue_head_t wait;
2114         spinlock_t lock;
2115 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2116         int     backlight_locker;
2117 #endif
2118 };
2119
2120 static LIST_HEAD(all_pmu_pvt);
2121 static DEFINE_SPINLOCK(all_pvt_lock);
2122
2123 static void
2124 pmu_pass_intr(unsigned char *data, int len)
2125 {
2126         struct pmu_private *pp;
2127         struct list_head *list;
2128         int i;
2129         unsigned long flags;
2130
2131         if (len > sizeof(pp->rb_buf[0].data))
2132                 len = sizeof(pp->rb_buf[0].data);
2133         spin_lock_irqsave(&all_pvt_lock, flags);
2134         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2135                 pp = list_entry(list, struct pmu_private, list);
2136                 spin_lock(&pp->lock);
2137                 i = pp->rb_put + 1;
2138                 if (i >= RB_SIZE)
2139                         i = 0;
2140                 if (i != pp->rb_get) {
2141                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2142                         rp->len = len;
2143                         memcpy(rp->data, data, len);
2144                         pp->rb_put = i;
2145                         wake_up_interruptible(&pp->wait);
2146                 }
2147                 spin_unlock(&pp->lock);
2148         }
2149         spin_unlock_irqrestore(&all_pvt_lock, flags);
2150 }
2151
2152 static int
2153 pmu_open(struct inode *inode, struct file *file)
2154 {
2155         struct pmu_private *pp;
2156         unsigned long flags;
2157
2158         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2159         if (!pp)
2160                 return -ENOMEM;
2161         pp->rb_get = pp->rb_put = 0;
2162         spin_lock_init(&pp->lock);
2163         init_waitqueue_head(&pp->wait);
2164         mutex_lock(&pmu_info_proc_mutex);
2165         spin_lock_irqsave(&all_pvt_lock, flags);
2166 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2167         pp->backlight_locker = 0;
2168 #endif
2169         list_add(&pp->list, &all_pmu_pvt);
2170         spin_unlock_irqrestore(&all_pvt_lock, flags);
2171         file->private_data = pp;
2172         mutex_unlock(&pmu_info_proc_mutex);
2173         return 0;
2174 }
2175
2176 static ssize_t
2177 pmu_read(struct file *file, char __user *buf,
2178                         size_t count, loff_t *ppos)
2179 {
2180         struct pmu_private *pp = file->private_data;
2181         DECLARE_WAITQUEUE(wait, current);
2182         unsigned long flags;
2183         int ret = 0;
2184
2185         if (count < 1 || !pp)
2186                 return -EINVAL;
2187
2188         spin_lock_irqsave(&pp->lock, flags);
2189         add_wait_queue(&pp->wait, &wait);
2190         set_current_state(TASK_INTERRUPTIBLE);
2191
2192         for (;;) {
2193                 ret = -EAGAIN;
2194                 if (pp->rb_get != pp->rb_put) {
2195                         int i = pp->rb_get;
2196                         struct rb_entry *rp = &pp->rb_buf[i];
2197                         ret = rp->len;
2198                         spin_unlock_irqrestore(&pp->lock, flags);
2199                         if (ret > count)
2200                                 ret = count;
2201                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2202                                 ret = -EFAULT;
2203                         if (++i >= RB_SIZE)
2204                                 i = 0;
2205                         spin_lock_irqsave(&pp->lock, flags);
2206                         pp->rb_get = i;
2207                 }
2208                 if (ret >= 0)
2209                         break;
2210                 if (file->f_flags & O_NONBLOCK)
2211                         break;
2212                 ret = -ERESTARTSYS;
2213                 if (signal_pending(current))
2214                         break;
2215                 spin_unlock_irqrestore(&pp->lock, flags);
2216                 schedule();
2217                 spin_lock_irqsave(&pp->lock, flags);
2218         }
2219         __set_current_state(TASK_RUNNING);
2220         remove_wait_queue(&pp->wait, &wait);
2221         spin_unlock_irqrestore(&pp->lock, flags);
2222
2223         return ret;
2224 }
2225
2226 static ssize_t
2227 pmu_write(struct file *file, const char __user *buf,
2228                          size_t count, loff_t *ppos)
2229 {
2230         return 0;
2231 }
2232
2233 static __poll_t
2234 pmu_fpoll(struct file *filp, poll_table *wait)
2235 {
2236         struct pmu_private *pp = filp->private_data;
2237         __poll_t mask = 0;
2238         unsigned long flags;
2239
2240         if (!pp)
2241                 return 0;
2242         poll_wait(filp, &pp->wait, wait);
2243         spin_lock_irqsave(&pp->lock, flags);
2244         if (pp->rb_get != pp->rb_put)
2245                 mask |= EPOLLIN;
2246         spin_unlock_irqrestore(&pp->lock, flags);
2247         return mask;
2248 }
2249
2250 static int
2251 pmu_release(struct inode *inode, struct file *file)
2252 {
2253         struct pmu_private *pp = file->private_data;
2254         unsigned long flags;
2255
2256         if (pp) {
2257                 file->private_data = NULL;
2258                 spin_lock_irqsave(&all_pvt_lock, flags);
2259                 list_del(&pp->list);
2260                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2261
2262 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2263                 if (pp->backlight_locker)
2264                         pmac_backlight_enable();
2265 #endif
2266
2267                 kfree(pp);
2268         }
2269         return 0;
2270 }
2271
2272 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2273 static void pmac_suspend_disable_irqs(void)
2274 {
2275         /* Call platform functions marked "on sleep" */
2276         pmac_pfunc_i2c_suspend();
2277         pmac_pfunc_base_suspend();
2278 }
2279
2280 static int powerbook_sleep(suspend_state_t state)
2281 {
2282         int error = 0;
2283
2284         /* Wait for completion of async requests */
2285         while (!batt_req.complete)
2286                 pmu_poll();
2287
2288         /* Giveup the lazy FPU & vec so we don't have to back them
2289          * up from the low level code
2290          */
2291         enable_kernel_fp();
2292
2293 #ifdef CONFIG_ALTIVEC
2294         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2295                 enable_kernel_altivec();
2296 #endif /* CONFIG_ALTIVEC */
2297
2298         switch (pmu_kind) {
2299         case PMU_OHARE_BASED:
2300                 error = powerbook_sleep_3400();
2301                 break;
2302         case PMU_HEATHROW_BASED:
2303         case PMU_PADDINGTON_BASED:
2304                 error = powerbook_sleep_grackle();
2305                 break;
2306         case PMU_KEYLARGO_BASED:
2307                 error = powerbook_sleep_Core99();
2308                 break;
2309         default:
2310                 return -ENOSYS;
2311         }
2312
2313         if (error)
2314                 return error;
2315
2316         mdelay(100);
2317
2318         return 0;
2319 }
2320
2321 static void pmac_suspend_enable_irqs(void)
2322 {
2323         /* Force a poll of ADB interrupts */
2324         adb_int_pending = 1;
2325         via_pmu_interrupt(0, NULL);
2326
2327         mdelay(10);
2328
2329         /* Call platform functions marked "on wake" */
2330         pmac_pfunc_base_resume();
2331         pmac_pfunc_i2c_resume();
2332 }
2333
2334 static int pmu_sleep_valid(suspend_state_t state)
2335 {
2336         return state == PM_SUSPEND_MEM
2337                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2338 }
2339
2340 static const struct platform_suspend_ops pmu_pm_ops = {
2341         .enter = powerbook_sleep,
2342         .valid = pmu_sleep_valid,
2343 };
2344
2345 static int register_pmu_pm_ops(void)
2346 {
2347         if (pmu_kind == PMU_OHARE_BASED)
2348                 powerbook_sleep_init_3400();
2349         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2350         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2351         suspend_set_ops(&pmu_pm_ops);
2352
2353         return 0;
2354 }
2355
2356 device_initcall(register_pmu_pm_ops);
2357 #endif
2358
2359 static int pmu_ioctl(struct file *filp,
2360                      u_int cmd, u_long arg)
2361 {
2362         __u32 __user *argp = (__u32 __user *)arg;
2363         int error = -EINVAL;
2364
2365         switch (cmd) {
2366 #ifdef CONFIG_PPC_PMAC
2367         case PMU_IOC_SLEEP:
2368                 if (!capable(CAP_SYS_ADMIN))
2369                         return -EACCES;
2370                 return pm_suspend(PM_SUSPEND_MEM);
2371         case PMU_IOC_CAN_SLEEP:
2372                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2373                         return put_user(0, argp);
2374                 else
2375                         return put_user(1, argp);
2376 #endif
2377
2378 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2379         /* Compatibility ioctl's for backlight */
2380         case PMU_IOC_GET_BACKLIGHT:
2381         {
2382                 int brightness;
2383
2384                 brightness = pmac_backlight_get_legacy_brightness();
2385                 if (brightness < 0)
2386                         return brightness;
2387                 else
2388                         return put_user(brightness, argp);
2389
2390         }
2391         case PMU_IOC_SET_BACKLIGHT:
2392         {
2393                 int brightness;
2394
2395                 error = get_user(brightness, argp);
2396                 if (error)
2397                         return error;
2398
2399                 return pmac_backlight_set_legacy_brightness(brightness);
2400         }
2401 #ifdef CONFIG_INPUT_ADBHID
2402         case PMU_IOC_GRAB_BACKLIGHT: {
2403                 struct pmu_private *pp = filp->private_data;
2404
2405                 if (pp->backlight_locker)
2406                         return 0;
2407
2408                 pp->backlight_locker = 1;
2409                 pmac_backlight_disable();
2410
2411                 return 0;
2412         }
2413 #endif /* CONFIG_INPUT_ADBHID */
2414 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2415
2416         case PMU_IOC_GET_MODEL:
2417                 return put_user(pmu_kind, argp);
2418         case PMU_IOC_HAS_ADB:
2419                 return put_user(pmu_has_adb, argp);
2420         }
2421         return error;
2422 }
2423
2424 static long pmu_unlocked_ioctl(struct file *filp,
2425                                u_int cmd, u_long arg)
2426 {
2427         int ret;
2428
2429         mutex_lock(&pmu_info_proc_mutex);
2430         ret = pmu_ioctl(filp, cmd, arg);
2431         mutex_unlock(&pmu_info_proc_mutex);
2432
2433         return ret;
2434 }
2435
2436 #ifdef CONFIG_COMPAT
2437 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2438 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2439 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2440 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2441 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2442 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2443
2444 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2445 {
2446         switch (cmd) {
2447         case PMU_IOC_SLEEP:
2448                 break;
2449         case PMU_IOC_GET_BACKLIGHT32:
2450                 cmd = PMU_IOC_GET_BACKLIGHT;
2451                 break;
2452         case PMU_IOC_SET_BACKLIGHT32:
2453                 cmd = PMU_IOC_SET_BACKLIGHT;
2454                 break;
2455         case PMU_IOC_GET_MODEL32:
2456                 cmd = PMU_IOC_GET_MODEL;
2457                 break;
2458         case PMU_IOC_HAS_ADB32:
2459                 cmd = PMU_IOC_HAS_ADB;
2460                 break;
2461         case PMU_IOC_CAN_SLEEP32:
2462                 cmd = PMU_IOC_CAN_SLEEP;
2463                 break;
2464         case PMU_IOC_GRAB_BACKLIGHT32:
2465                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2466                 break;
2467         default:
2468                 return -ENOIOCTLCMD;
2469         }
2470         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2471 }
2472 #endif
2473
2474 static const struct file_operations pmu_device_fops = {
2475         .read           = pmu_read,
2476         .write          = pmu_write,
2477         .poll           = pmu_fpoll,
2478         .unlocked_ioctl = pmu_unlocked_ioctl,
2479 #ifdef CONFIG_COMPAT
2480         .compat_ioctl   = compat_pmu_ioctl,
2481 #endif
2482         .open           = pmu_open,
2483         .release        = pmu_release,
2484         .llseek         = noop_llseek,
2485 };
2486
2487 static struct miscdevice pmu_device = {
2488         PMU_MINOR, "pmu", &pmu_device_fops
2489 };
2490
2491 static int pmu_device_init(void)
2492 {
2493         if (pmu_state == uninitialized)
2494                 return 0;
2495         if (misc_register(&pmu_device) < 0)
2496                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2497         return 0;
2498 }
2499 device_initcall(pmu_device_init);
2500
2501
2502 #ifdef DEBUG_SLEEP
2503 static inline void
2504 polled_handshake(void)
2505 {
2506         via2[B] &= ~TREQ; eieio();
2507         while ((via2[B] & TACK) != 0)
2508                 ;
2509         via2[B] |= TREQ; eieio();
2510         while ((via2[B] & TACK) == 0)
2511                 ;
2512 }
2513
2514 static inline void
2515 polled_send_byte(int x)
2516 {
2517         via1[ACR] |= SR_OUT | SR_EXT; eieio();
2518         via1[SR] = x; eieio();
2519         polled_handshake();
2520 }
2521
2522 static inline int
2523 polled_recv_byte(void)
2524 {
2525         int x;
2526
2527         via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2528         x = via1[SR]; eieio();
2529         polled_handshake();
2530         x = via1[SR]; eieio();
2531         return x;
2532 }
2533
2534 int
2535 pmu_polled_request(struct adb_request *req)
2536 {
2537         unsigned long flags;
2538         int i, l, c;
2539
2540         req->complete = 1;
2541         c = req->data[0];
2542         l = pmu_data_len[c][0];
2543         if (l >= 0 && req->nbytes != l + 1)
2544                 return -EINVAL;
2545
2546         local_irq_save(flags);
2547         while (pmu_state != idle)
2548                 pmu_poll();
2549
2550         while ((via2[B] & TACK) == 0)
2551                 ;
2552         polled_send_byte(c);
2553         if (l < 0) {
2554                 l = req->nbytes - 1;
2555                 polled_send_byte(l);
2556         }
2557         for (i = 1; i <= l; ++i)
2558                 polled_send_byte(req->data[i]);
2559
2560         l = pmu_data_len[c][1];
2561         if (l < 0)
2562                 l = polled_recv_byte();
2563         for (i = 0; i < l; ++i)
2564                 req->reply[i + req->reply_len] = polled_recv_byte();
2565
2566         if (req->done)
2567                 (*req->done)(req);
2568
2569         local_irq_restore(flags);
2570         return 0;
2571 }
2572
2573 /* N.B. This doesn't work on the 3400 */
2574 void pmu_blink(int n)
2575 {
2576         struct adb_request req;
2577
2578         memset(&req, 0, sizeof(req));
2579
2580         for (; n > 0; --n) {
2581                 req.nbytes = 4;
2582                 req.done = NULL;
2583                 req.data[0] = 0xee;
2584                 req.data[1] = 4;
2585                 req.data[2] = 0;
2586                 req.data[3] = 1;
2587                 req.reply[0] = ADB_RET_OK;
2588                 req.reply_len = 1;
2589                 req.reply_expected = 0;
2590                 pmu_polled_request(&req);
2591                 mdelay(50);
2592                 req.nbytes = 4;
2593                 req.done = NULL;
2594                 req.data[0] = 0xee;
2595                 req.data[1] = 4;
2596                 req.data[2] = 0;
2597                 req.data[3] = 0;
2598                 req.reply[0] = ADB_RET_OK;
2599                 req.reply_len = 1;
2600                 req.reply_expected = 0;
2601                 pmu_polled_request(&req);
2602                 mdelay(50);
2603         }
2604         mdelay(50);
2605 }
2606 #endif /* DEBUG_SLEEP */
2607
2608 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2609 int pmu_sys_suspended;
2610
2611 static int pmu_syscore_suspend(void)
2612 {
2613         /* Suspend PMU event interrupts */
2614         pmu_suspend();
2615         pmu_sys_suspended = 1;
2616
2617 #ifdef CONFIG_PMAC_BACKLIGHT
2618         /* Tell backlight code not to muck around with the chip anymore */
2619         pmu_backlight_set_sleep(1);
2620 #endif
2621
2622         return 0;
2623 }
2624
2625 static void pmu_syscore_resume(void)
2626 {
2627         struct adb_request req;
2628
2629         if (!pmu_sys_suspended)
2630                 return;
2631
2632         /* Tell PMU we are ready */
2633         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2634         pmu_wait_complete(&req);
2635
2636 #ifdef CONFIG_PMAC_BACKLIGHT
2637         /* Tell backlight code it can use the chip again */
2638         pmu_backlight_set_sleep(0);
2639 #endif
2640         /* Resume PMU event interrupts */
2641         pmu_resume();
2642         pmu_sys_suspended = 0;
2643 }
2644
2645 static struct syscore_ops pmu_syscore_ops = {
2646         .suspend = pmu_syscore_suspend,
2647         .resume = pmu_syscore_resume,
2648 };
2649
2650 static int pmu_syscore_register(void)
2651 {
2652         register_syscore_ops(&pmu_syscore_ops);
2653
2654         return 0;
2655 }
2656 subsys_initcall(pmu_syscore_register);
2657 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2658
2659 EXPORT_SYMBOL(pmu_request);
2660 EXPORT_SYMBOL(pmu_queue_request);
2661 EXPORT_SYMBOL(pmu_poll);
2662 EXPORT_SYMBOL(pmu_poll_adb);
2663 EXPORT_SYMBOL(pmu_wait_complete);
2664 EXPORT_SYMBOL(pmu_suspend);
2665 EXPORT_SYMBOL(pmu_resume);
2666 EXPORT_SYMBOL(pmu_unlock);
2667 #if defined(CONFIG_PPC32)
2668 EXPORT_SYMBOL(pmu_enable_irled);
2669 EXPORT_SYMBOL(pmu_battery_count);
2670 EXPORT_SYMBOL(pmu_batteries);
2671 EXPORT_SYMBOL(pmu_power_flags);
2672 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2673