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 <asm/machdep.h>
  54 #include <asm/io.h>
  55 #include <asm/pgtable.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 /* Misc minor number allocated for /dev/pmu */
  79 #define PMU_MINOR               154
  80
  81 /* How many iterations between battery polls */
  82 #define BATTERY_POLLING_COUNT   2
  83
  84 static DEFINE_MUTEX(pmu_info_proc_mutex);
  85
  86 /* VIA registers - spaced 0x200 bytes apart */
  87 #define RS              0x200           /* skip between registers */
  88 #define B               0               /* B-side data */
  89 #define A               RS              /* A-side data */
  90 #define DIRB            (2*RS)          /* B-side direction (1=output) */
  91 #define DIRA            (3*RS)          /* A-side direction (1=output) */
  92 #define T1CL            (4*RS)          /* Timer 1 ctr/latch (low 8 bits) */
  93 #define T1CH            (5*RS)          /* Timer 1 counter (high 8 bits) */
  94 #define T1LL            (6*RS)          /* Timer 1 latch (low 8 bits) */
  95 #define T1LH            (7*RS)          /* Timer 1 latch (high 8 bits) */
  96 #define T2CL            (8*RS)          /* Timer 2 ctr/latch (low 8 bits) */
  97 #define T2CH            (9*RS)          /* Timer 2 counter (high 8 bits) */
  98 #define SR              (10*RS)         /* Shift register */
  99 #define ACR             (11*RS)         /* Auxiliary control register */
 100 #define PCR             (12*RS)         /* Peripheral control register */
 101 #define IFR             (13*RS)         /* Interrupt flag register */
 102 #define IER             (14*RS)         /* Interrupt enable register */
 103 #define ANH             (15*RS)         /* A-side data, no handshake */
 104
 105 /* Bits in B data register: both active low */
 106 #ifdef CONFIG_PPC_PMAC
 107 #define TACK            0x08            /* Transfer acknowledge (input) */
 108 #define TREQ            0x10            /* Transfer request (output) */
 109 #else
 110 #define TACK            0x02
 111 #define TREQ            0x04
 112 #endif
 113
 114 /* Bits in ACR */
 115 #define SR_CTRL         0x1c            /* Shift register control bits */
 116 #define SR_EXT          0x0c            /* Shift on external clock */
 117 #define SR_OUT          0x10            /* Shift out if 1 */
 118
 119 /* Bits in IFR and IER */
 120 #define IER_SET         0x80            /* set bits in IER */
 121 #define IER_CLR         0               /* clear bits in IER */
 122 #define SR_INT          0x04            /* Shift register full/empty */
 123 #define CB2_INT         0x08
 124 #define CB1_INT         0x10            /* transition on CB1 input */
 125
 126 static volatile enum pmu_state {
 127         uninitialized = 0,
 128         idle,
 129         sending,
 130         intack,
 131         reading,
 132         reading_intr,
 133         locked,
 134 } pmu_state;
 135
 136 static volatile enum int_data_state {
 137         int_data_empty,
 138         int_data_fill,
 139         int_data_ready,
 140         int_data_flush
 141 } int_data_state[2] = { int_data_empty, int_data_empty };
 142
 143 static struct adb_request *current_req;
 144 static struct adb_request *last_req;
 145 static struct adb_request *req_awaiting_reply;
 146 static unsigned char interrupt_data[2][32];
 147 static int interrupt_data_len[2];
 148 static int int_data_last;
 149 static unsigned char *reply_ptr;
 150 static int data_index;
 151 static int data_len;
 152 static volatile int adb_int_pending;
 153 static volatile int disable_poll;
 154 static int pmu_kind = PMU_UNKNOWN;
 155 static int pmu_fully_inited;
 156 static int pmu_has_adb;
 157 #ifdef CONFIG_PPC_PMAC
 158 static volatile unsigned char __iomem *via1;
 159 static volatile unsigned char __iomem *via2;
 160 static struct device_node *vias;
 161 static struct device_node *gpio_node;
 162 #endif
 163 static unsigned char __iomem *gpio_reg;
 164 static int gpio_irq = 0;
 165 static int gpio_irq_enabled = -1;
 166 static volatile int pmu_suspended;
 167 static spinlock_t pmu_lock;
 168 static u8 pmu_intr_mask;
 169 static int pmu_version;
 170 static int drop_interrupts;
 171 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 172 static int option_lid_wakeup = 1;
 173 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
 174 static unsigned long async_req_locks;
 175
 176 #define NUM_IRQ_STATS 13
 177 static unsigned int pmu_irq_stats[NUM_IRQ_STATS];
 178
 179 static struct proc_dir_entry *proc_pmu_root;
 180 static struct proc_dir_entry *proc_pmu_info;
 181 static struct proc_dir_entry *proc_pmu_irqstats;
 182 static struct proc_dir_entry *proc_pmu_options;
 183 static int option_server_mode;
 184
 185 int pmu_battery_count;
 186 int pmu_cur_battery;
 187 unsigned int pmu_power_flags = PMU_PWR_AC_PRESENT;
 188 struct pmu_battery_info pmu_batteries[PMU_MAX_BATTERIES];
 189 static int query_batt_timer = BATTERY_POLLING_COUNT;
 190 static struct adb_request batt_req;
 191 static struct proc_dir_entry *proc_pmu_batt[PMU_MAX_BATTERIES];
 192
 193 int __fake_sleep;
 194 int asleep;
 195
 196 #ifdef CONFIG_ADB
 197 static int adb_dev_map;
 198 static int pmu_adb_flags;
 199
 200 static int pmu_probe(void);
 201 static int pmu_init(void);
 202 static int pmu_send_request(struct adb_request *req, int sync);
 203 static int pmu_adb_autopoll(int devs);
 204 static int pmu_adb_reset_bus(void);
 205 #endif /* CONFIG_ADB */
 206
 207 static int init_pmu(void);
 208 static void pmu_start(void);
 209 static irqreturn_t via_pmu_interrupt(int irq, void *arg);
 210 static irqreturn_t gpio1_interrupt(int irq, void *arg);
 211 static int pmu_info_proc_show(struct seq_file *m, void *v);
 212 static int pmu_irqstats_proc_show(struct seq_file *m, void *v);
 213 static int pmu_battery_proc_show(struct seq_file *m, void *v);
 214 static void pmu_pass_intr(unsigned char *data, int len);
 215 static const struct proc_ops pmu_options_proc_ops;
 216
 217 #ifdef CONFIG_ADB
 218 const struct adb_driver via_pmu_driver = {
 219         .name         = "PMU",
 220         .probe        = pmu_probe,
 221         .init         = pmu_init,
 222         .send_request = pmu_send_request,
 223         .autopoll     = pmu_adb_autopoll,
 224         .poll         = pmu_poll_adb,
 225         .reset_bus    = pmu_adb_reset_bus,
 226 };
 227 #endif /* CONFIG_ADB */
 228
 229 extern void low_sleep_handler(void);
 230 extern void enable_kernel_altivec(void);
 231 extern void enable_kernel_fp(void);
 232
 233 #ifdef DEBUG_SLEEP
 234 int pmu_polled_request(struct adb_request *req);
 235 void pmu_blink(int n);
 236 #endif
 237
 238 /*
 239  * This table indicates for each PMU opcode:
 240  * - the number of data bytes to be sent with the command, or -1
 241  *   if a length byte should be sent,
 242  * - the number of response bytes which the PMU will return, or
 243  *   -1 if it will send a length byte.
 244  */
 245 static const s8 pmu_data_len[256][2] = {
 246 /*         0       1       2       3       4       5       6       7  */
 247 /*00*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 248 /*08*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 249 /*10*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 250 /*18*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0, 0},
 251 /*20*/  {-1, 0},{ 0, 0},{ 2, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},
 252 /*28*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{ 0,-1},
 253 /*30*/  { 4, 0},{20, 0},{-1, 0},{ 3, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 254 /*38*/  { 0, 4},{ 0,20},{ 2,-1},{ 2, 1},{ 3,-1},{-1,-1},{-1,-1},{ 4, 0},
 255 /*40*/  { 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 256 /*48*/  { 0, 1},{ 0, 1},{-1,-1},{ 1, 0},{ 1, 0},{-1,-1},{-1,-1},{-1,-1},
 257 /*50*/  { 1, 0},{ 0, 0},{ 2, 0},{ 2, 0},{-1, 0},{ 1, 0},{ 3, 0},{ 1, 0},
 258 /*58*/  { 0, 1},{ 1, 0},{ 0, 2},{ 0, 2},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},
 259 /*60*/  { 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 260 /*68*/  { 0, 3},{ 0, 3},{ 0, 2},{ 0, 8},{ 0,-1},{ 0,-1},{-1,-1},{-1,-1},
 261 /*70*/  { 1, 0},{ 1, 0},{ 1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 262 /*78*/  { 0,-1},{ 0,-1},{-1,-1},{-1,-1},{-1,-1},{ 5, 1},{ 4, 1},{ 4, 1},
 263 /*80*/  { 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 264 /*88*/  { 0, 5},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 265 /*90*/  { 1, 0},{ 2, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 266 /*98*/  { 0, 1},{ 0, 1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 267 /*a0*/  { 2, 0},{ 2, 0},{ 2, 0},{ 4, 0},{-1, 0},{ 0, 0},{-1, 0},{-1, 0},
 268 /*a8*/  { 1, 1},{ 1, 0},{ 3, 0},{ 2, 0},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 269 /*b0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 270 /*b8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 271 /*c0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 272 /*c8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 273 /*d0*/  { 0, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 274 /*d8*/  { 1, 1},{ 1, 1},{-1,-1},{-1,-1},{ 0, 1},{ 0,-1},{-1,-1},{-1,-1},
 275 /*e0*/  {-1, 0},{ 4, 0},{ 0, 1},{-1, 0},{-1, 0},{ 4, 0},{-1, 0},{-1, 0},
 276 /*e8*/  { 3,-1},{-1,-1},{ 0, 1},{-1,-1},{ 0,-1},{-1,-1},{-1,-1},{ 0, 0},
 277 /*f0*/  {-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},{-1, 0},
 278 /*f8*/  {-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},{-1,-1},
 279 };
 280
 281 static char *pbook_type[] = {
 282         "Unknown PowerBook",
 283         "PowerBook 2400/3400/3500(G3)",
 284         "PowerBook G3 Series",
 285         "1999 PowerBook G3",
 286         "Core99"
 287 };
 288
 289 int __init find_via_pmu(void)
 290 {
 291 #ifdef CONFIG_PPC_PMAC
 292         u64 taddr;
 293         const u32 *reg;
 294
 295         if (pmu_state != uninitialized)
 296                 return 1;
 297         vias = of_find_node_by_name(NULL, "via-pmu");
 298         if (vias == NULL)
 299                 return 0;
 300
 301         reg = of_get_property(vias, "reg", NULL);
 302         if (reg == NULL) {
 303                 printk(KERN_ERR "via-pmu: No \"reg\" property !\n");
 304                 goto fail;
 305         }
 306         taddr = of_translate_address(vias, reg);
 307         if (taddr == OF_BAD_ADDR) {
 308                 printk(KERN_ERR "via-pmu: Can't translate address !\n");
 309                 goto fail;
 310         }
 311
 312         spin_lock_init(&pmu_lock);
 313
 314         pmu_has_adb = 1;
 315
 316         pmu_intr_mask = PMU_INT_PCEJECT |
 317                         PMU_INT_SNDBRT |
 318                         PMU_INT_ADB |
 319                         PMU_INT_TICK;
 320
 321         if (of_node_name_eq(vias->parent, "ohare") ||
 322             of_device_is_compatible(vias->parent, "ohare"))
 323                 pmu_kind = PMU_OHARE_BASED;
 324         else if (of_device_is_compatible(vias->parent, "paddington"))
 325                 pmu_kind = PMU_PADDINGTON_BASED;
 326         else if (of_device_is_compatible(vias->parent, "heathrow"))
 327                 pmu_kind = PMU_HEATHROW_BASED;
 328         else if (of_device_is_compatible(vias->parent, "Keylargo")
 329                  || of_device_is_compatible(vias->parent, "K2-Keylargo")) {
 330                 struct device_node *gpiop;
 331                 struct device_node *adbp;
 332                 u64 gaddr = OF_BAD_ADDR;
 333
 334                 pmu_kind = PMU_KEYLARGO_BASED;
 335                 adbp = of_find_node_by_type(NULL, "adb");
 336                 pmu_has_adb = (adbp != NULL);
 337                 of_node_put(adbp);
 338                 pmu_intr_mask = PMU_INT_PCEJECT |
 339                                 PMU_INT_SNDBRT |
 340                                 PMU_INT_ADB |
 341                                 PMU_INT_TICK |
 342                                 PMU_INT_ENVIRONMENT;
 343
 344                 gpiop = of_find_node_by_name(NULL, "gpio");
 345                 if (gpiop) {
 346                         reg = of_get_property(gpiop, "reg", NULL);
 347                         if (reg)
 348                                 gaddr = of_translate_address(gpiop, reg);
 349                         if (gaddr != OF_BAD_ADDR)
 350                                 gpio_reg = ioremap(gaddr, 0x10);
 351                         of_node_put(gpiop);
 352                 }
 353                 if (gpio_reg == NULL) {
 354                         printk(KERN_ERR "via-pmu: Can't find GPIO reg !\n");
 355                         goto fail;
 356                 }
 357         } else
 358                 pmu_kind = PMU_UNKNOWN;
 359
 360         via1 = via2 = ioremap(taddr, 0x2000);
 361         if (via1 == NULL) {
 362                 printk(KERN_ERR "via-pmu: Can't map address !\n");
 363                 goto fail_via_remap;
 364         }
 365
 366         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
 367         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
 368
 369         pmu_state = idle;
 370
 371         if (!init_pmu())
 372                 goto fail_init;
 373
 374         sys_ctrler = SYS_CTRLER_PMU;
 375
 376         return 1;
 377
 378  fail_init:
 379         iounmap(via1);
 380         via1 = via2 = NULL;
 381  fail_via_remap:
 382         iounmap(gpio_reg);
 383         gpio_reg = NULL;
 384  fail:
 385         of_node_put(vias);
 386         vias = NULL;
 387         pmu_state = uninitialized;
 388         return 0;
 389 #else
 390         if (macintosh_config->adb_type != MAC_ADB_PB2)
 391                 return 0;
 392
 393         pmu_kind = PMU_UNKNOWN;
 394
 395         spin_lock_init(&pmu_lock);
 396
 397         pmu_has_adb = 1;
 398
 399         pmu_intr_mask = PMU_INT_PCEJECT |
 400                         PMU_INT_SNDBRT |
 401                         PMU_INT_ADB |
 402                         PMU_INT_TICK;
 403
 404         pmu_state = idle;
 405
 406         if (!init_pmu()) {
 407                 pmu_state = uninitialized;
 408                 return 0;
 409         }
 410
 411         return 1;
 412 #endif /* !CONFIG_PPC_PMAC */
 413 }
 414
 415 #ifdef CONFIG_ADB
 416 static int pmu_probe(void)
 417 {
 418         return pmu_state == uninitialized ? -ENODEV : 0;
 419 }
 420
 421 static int pmu_init(void)
 422 {
 423         return pmu_state == uninitialized ? -ENODEV : 0;
 424 }
 425 #endif /* CONFIG_ADB */
 426
 427 /*
 428  * We can't wait until pmu_init gets called, that happens too late.
 429  * It happens after IDE and SCSI initialization, which can take a few
 430  * seconds, and by that time the PMU could have given up on us and
 431  * turned us off.
 432  * Thus this is called with arch_initcall rather than device_initcall.
 433  */
 434 static int __init via_pmu_start(void)
 435 {
 436         unsigned int __maybe_unused irq;
 437
 438         if (pmu_state == uninitialized)
 439                 return -ENODEV;
 440
 441         batt_req.complete = 1;
 442
 443 #ifdef CONFIG_PPC_PMAC
 444         irq = irq_of_parse_and_map(vias, 0);
 445         if (!irq) {
 446                 printk(KERN_ERR "via-pmu: can't map interrupt\n");
 447                 return -ENODEV;
 448         }
 449         /* We set IRQF_NO_SUSPEND because we don't want the interrupt
 450          * to be disabled between the 2 passes of driver suspend, we
 451          * control our own disabling for that one
 452          */
 453         if (request_irq(irq, via_pmu_interrupt, IRQF_NO_SUSPEND,
 454                         "VIA-PMU", (void *)0)) {
 455                 printk(KERN_ERR "via-pmu: can't request irq %d\n", irq);
 456                 return -ENODEV;
 457         }
 458
 459         if (pmu_kind == PMU_KEYLARGO_BASED) {
 460                 gpio_node = of_find_node_by_name(NULL, "extint-gpio1");
 461                 if (gpio_node == NULL)
 462                         gpio_node = of_find_node_by_name(NULL,
 463                                                          "pmu-interrupt");
 464                 if (gpio_node)
 465                         gpio_irq = irq_of_parse_and_map(gpio_node, 0);
 466
 467                 if (gpio_irq) {
 468                         if (request_irq(gpio_irq, gpio1_interrupt,
 469                                         IRQF_NO_SUSPEND, "GPIO1 ADB",
 470                                         (void *)0))
 471                                 printk(KERN_ERR "pmu: can't get irq %d"
 472                                        " (GPIO1)\n", gpio_irq);
 473                         else
 474                                 gpio_irq_enabled = 1;
 475                 }
 476         }
 477
 478         /* Enable interrupts */
 479         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
 480 #else
 481         if (request_irq(IRQ_MAC_ADB_SR, via_pmu_interrupt, IRQF_NO_SUSPEND,
 482                         "VIA-PMU-SR", NULL)) {
 483                 pr_err("%s: couldn't get SR irq\n", __func__);
 484                 return -ENODEV;
 485         }
 486         if (request_irq(IRQ_MAC_ADB_CL, via_pmu_interrupt, IRQF_NO_SUSPEND,
 487                         "VIA-PMU-CL", NULL)) {
 488                 pr_err("%s: couldn't get CL irq\n", __func__);
 489                 free_irq(IRQ_MAC_ADB_SR, NULL);
 490                 return -ENODEV;
 491         }
 492 #endif /* !CONFIG_PPC_PMAC */
 493
 494         pmu_fully_inited = 1;
 495
 496         /* Make sure PMU settle down before continuing. This is _very_ important
 497          * since the IDE probe may shut interrupts down for quite a bit of time. If
 498          * a PMU communication is pending while this happens, the PMU may timeout
 499          * Not that on Core99 machines, the PMU keeps sending us environement
 500          * messages, we should find a way to either fix IDE or make it call
 501          * pmu_suspend() before masking interrupts. This can also happens while
 502          * scolling with some fbdevs.
 503          */
 504         do {
 505                 pmu_poll();
 506         } while (pmu_state != idle);
 507
 508         return 0;
 509 }
 510
 511 arch_initcall(via_pmu_start);
 512
 513 /*
 514  * This has to be done after pci_init, which is a subsys_initcall.
 515  */
 516 static int __init via_pmu_dev_init(void)
 517 {
 518         if (pmu_state == uninitialized)
 519                 return -ENODEV;
 520
 521 #ifdef CONFIG_PMAC_BACKLIGHT
 522         /* Initialize backlight */
 523         pmu_backlight_init();
 524 #endif
 525
 526 #ifdef CONFIG_PPC32
 527         if (of_machine_is_compatible("AAPL,3400/2400") ||
 528                 of_machine_is_compatible("AAPL,3500")) {
 529                 int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 530                         NULL, PMAC_MB_INFO_MODEL, 0);
 531                 pmu_battery_count = 1;
 532                 if (mb == PMAC_TYPE_COMET)
 533                         pmu_batteries[0].flags |= PMU_BATT_TYPE_COMET;
 534                 else
 535                         pmu_batteries[0].flags |= PMU_BATT_TYPE_HOOPER;
 536         } else if (of_machine_is_compatible("AAPL,PowerBook1998") ||
 537                 of_machine_is_compatible("PowerBook1,1")) {
 538                 pmu_battery_count = 2;
 539                 pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 540                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 541         } else {
 542                 struct device_node* prim =
 543                         of_find_node_by_name(NULL, "power-mgt");
 544                 const u32 *prim_info = NULL;
 545                 if (prim)
 546                         prim_info = of_get_property(prim, "prim-info", NULL);
 547                 if (prim_info) {
 548                         /* Other stuffs here yet unknown */
 549                         pmu_battery_count = (prim_info[6] >> 16) & 0xff;
 550                         pmu_batteries[0].flags |= PMU_BATT_TYPE_SMART;
 551                         if (pmu_battery_count > 1)
 552                                 pmu_batteries[1].flags |= PMU_BATT_TYPE_SMART;
 553                 }
 554                 of_node_put(prim);
 555         }
 556 #endif /* CONFIG_PPC32 */
 557
 558         /* Create /proc/pmu */
 559         proc_pmu_root = proc_mkdir("pmu", NULL);
 560         if (proc_pmu_root) {
 561                 long i;
 562
 563                 for (i=0; i<pmu_battery_count; i++) {
 564                         char title[16];
 565                         sprintf(title, "battery_%ld", i);
 566                         proc_pmu_batt[i] = proc_create_single_data(title, 0,
 567                                         proc_pmu_root, pmu_battery_proc_show,
 568                                         (void *)i);
 569                 }
 570
 571                 proc_pmu_info = proc_create_single("info", 0, proc_pmu_root,
 572                                 pmu_info_proc_show);
 573                 proc_pmu_irqstats = proc_create_single("interrupts", 0,
 574                                 proc_pmu_root, pmu_irqstats_proc_show);
 575                 proc_pmu_options = proc_create("options", 0600, proc_pmu_root,
 576                                                 &pmu_options_proc_ops);
 577         }
 578         return 0;
 579 }
 580
 581 device_initcall(via_pmu_dev_init);
 582
 583 static int
 584 init_pmu(void)
 585 {
 586         int timeout;
 587         struct adb_request req;
 588
 589         /* Negate TREQ. Set TACK to input and TREQ to output. */
 590         out_8(&via2[B], in_8(&via2[B]) | TREQ);
 591         out_8(&via2[DIRB], (in_8(&via2[DIRB]) | TREQ) & ~TACK);
 592
 593         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
 594         timeout =  100000;
 595         while (!req.complete) {
 596                 if (--timeout < 0) {
 597                         printk(KERN_ERR "init_pmu: no response from PMU\n");
 598                         return 0;
 599                 }
 600                 udelay(10);
 601                 pmu_poll();
 602         }
 603
 604         /* ack all pending interrupts */
 605         timeout = 100000;
 606         interrupt_data[0][0] = 1;
 607         while (interrupt_data[0][0] || pmu_state != idle) {
 608                 if (--timeout < 0) {
 609                         printk(KERN_ERR "init_pmu: timed out acking intrs\n");
 610                         return 0;
 611                 }
 612                 if (pmu_state == idle)
 613                         adb_int_pending = 1;
 614                 via_pmu_interrupt(0, NULL);
 615                 udelay(10);
 616         }
 617
 618         /* Tell PMU we are ready.  */
 619         if (pmu_kind == PMU_KEYLARGO_BASED) {
 620                 pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
 621                 while (!req.complete)
 622                         pmu_poll();
 623         }
 624
 625         /* Read PMU version */
 626         pmu_request(&req, NULL, 1, PMU_GET_VERSION);
 627         pmu_wait_complete(&req);
 628         if (req.reply_len > 0)
 629                 pmu_version = req.reply[0];
 630
 631         /* Read server mode setting */
 632         if (pmu_kind == PMU_KEYLARGO_BASED) {
 633                 pmu_request(&req, NULL, 2, PMU_POWER_EVENTS,
 634                             PMU_PWR_GET_POWERUP_EVENTS);
 635                 pmu_wait_complete(&req);
 636                 if (req.reply_len == 2) {
 637                         if (req.reply[1] & PMU_PWR_WAKEUP_AC_INSERT)
 638                                 option_server_mode = 1;
 639                         printk(KERN_INFO "via-pmu: Server Mode is %s\n",
 640                                option_server_mode ? "enabled" : "disabled");
 641                 }
 642         }
 643
 644         printk(KERN_INFO "PMU driver v%d initialized for %s, firmware: %02x\n",
 645                PMU_DRIVER_VERSION, pbook_type[pmu_kind], pmu_version);
 646
 647         return 1;
 648 }
 649
 650 int
 651 pmu_get_model(void)
 652 {
 653         return pmu_kind;
 654 }
 655
 656 static void pmu_set_server_mode(int server_mode)
 657 {
 658         struct adb_request req;
 659
 660         if (pmu_kind != PMU_KEYLARGO_BASED)
 661                 return;
 662
 663         option_server_mode = server_mode;
 664         pmu_request(&req, NULL, 2, PMU_POWER_EVENTS, PMU_PWR_GET_POWERUP_EVENTS);
 665         pmu_wait_complete(&req);
 666         if (req.reply_len < 2)
 667                 return;
 668         if (server_mode)
 669                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 670                             PMU_PWR_SET_POWERUP_EVENTS,
 671                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 672         else
 673                 pmu_request(&req, NULL, 4, PMU_POWER_EVENTS,
 674                             PMU_PWR_CLR_POWERUP_EVENTS,
 675                             req.reply[0], PMU_PWR_WAKEUP_AC_INSERT);
 676         pmu_wait_complete(&req);
 677 }
 678
 679 /* This new version of the code for 2400/3400/3500 powerbooks
 680  * is inspired from the implementation in gkrellm-pmu
 681  */
 682 static void
 683 done_battery_state_ohare(struct adb_request* req)
 684 {
 685 #ifdef CONFIG_PPC_PMAC
 686         /* format:
 687          *  [0]    :  flags
 688          *    0x01 :  AC indicator
 689          *    0x02 :  charging
 690          *    0x04 :  battery exist
 691          *    0x08 :
 692          *    0x10 :
 693          *    0x20 :  full charged
 694          *    0x40 :  pcharge reset
 695          *    0x80 :  battery exist
 696          *
 697          *  [1][2] :  battery voltage
 698          *  [3]    :  CPU temperature
 699          *  [4]    :  battery temperature
 700          *  [5]    :  current
 701          *  [6][7] :  pcharge
 702          *              --tkoba
 703          */
 704         unsigned int bat_flags = PMU_BATT_TYPE_HOOPER;
 705         long pcharge, charge, vb, vmax, lmax;
 706         long vmax_charging, vmax_charged;
 707         long amperage, voltage, time, max;
 708         int mb = pmac_call_feature(PMAC_FTR_GET_MB_INFO,
 709                         NULL, PMAC_MB_INFO_MODEL, 0);
 710
 711         if (req->reply[0] & 0x01)
 712                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 713         else
 714                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 715
 716         if (mb == PMAC_TYPE_COMET) {
 717                 vmax_charged = 189;
 718                 vmax_charging = 213;
 719                 lmax = 6500;
 720         } else {
 721                 vmax_charged = 330;
 722                 vmax_charging = 330;
 723                 lmax = 6500;
 724         }
 725         vmax = vmax_charged;
 726
 727         /* If battery installed */
 728         if (req->reply[0] & 0x04) {
 729                 bat_flags |= PMU_BATT_PRESENT;
 730                 if (req->reply[0] & 0x02)
 731                         bat_flags |= PMU_BATT_CHARGING;
 732                 vb = (req->reply[1] << 8) | req->reply[2];
 733                 voltage = (vb * 265 + 72665) / 10;
 734                 amperage = req->reply[5];
 735                 if ((req->reply[0] & 0x01) == 0) {
 736                         if (amperage > 200)
 737                                 vb += ((amperage - 200) * 15)/100;
 738                 } else if (req->reply[0] & 0x02) {
 739                         vb = (vb * 97) / 100;
 740                         vmax = vmax_charging;
 741                 }
 742                 charge = (100 * vb) / vmax;
 743                 if (req->reply[0] & 0x40) {
 744                         pcharge = (req->reply[6] << 8) + req->reply[7];
 745                         if (pcharge > lmax)
 746                                 pcharge = lmax;
 747                         pcharge *= 100;
 748                         pcharge = 100 - pcharge / lmax;
 749                         if (pcharge < charge)
 750                                 charge = pcharge;
 751                 }
 752                 if (amperage > 0)
 753                         time = (charge * 16440) / amperage;
 754                 else
 755                         time = 0;
 756                 max = 100;
 757                 amperage = -amperage;
 758         } else
 759                 charge = max = amperage = voltage = time = 0;
 760
 761         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 762         pmu_batteries[pmu_cur_battery].charge = charge;
 763         pmu_batteries[pmu_cur_battery].max_charge = max;
 764         pmu_batteries[pmu_cur_battery].amperage = amperage;
 765         pmu_batteries[pmu_cur_battery].voltage = voltage;
 766         pmu_batteries[pmu_cur_battery].time_remaining = time;
 767 #endif /* CONFIG_PPC_PMAC */
 768
 769         clear_bit(0, &async_req_locks);
 770 }
 771
 772 static void
 773 done_battery_state_smart(struct adb_request* req)
 774 {
 775         /* format:
 776          *  [0] : format of this structure (known: 3,4,5)
 777          *  [1] : flags
 778          *
 779          *  format 3 & 4:
 780          *
 781          *  [2] : charge
 782          *  [3] : max charge
 783          *  [4] : current
 784          *  [5] : voltage
 785          *
 786          *  format 5:
 787          *
 788          *  [2][3] : charge
 789          *  [4][5] : max charge
 790          *  [6][7] : current
 791          *  [8][9] : voltage
 792          */
 793
 794         unsigned int bat_flags = PMU_BATT_TYPE_SMART;
 795         int amperage;
 796         unsigned int capa, max, voltage;
 797
 798         if (req->reply[1] & 0x01)
 799                 pmu_power_flags |= PMU_PWR_AC_PRESENT;
 800         else
 801                 pmu_power_flags &= ~PMU_PWR_AC_PRESENT;
 802
 803
 804         capa = max = amperage = voltage = 0;
 805
 806         if (req->reply[1] & 0x04) {
 807                 bat_flags |= PMU_BATT_PRESENT;
 808                 switch(req->reply[0]) {
 809                         case 3:
 810                         case 4: capa = req->reply[2];
 811                                 max = req->reply[3];
 812                                 amperage = *((signed char *)&req->reply[4]);
 813                                 voltage = req->reply[5];
 814                                 break;
 815                         case 5: capa = (req->reply[2] << 8) | req->reply[3];
 816                                 max = (req->reply[4] << 8) | req->reply[5];
 817                                 amperage = *((signed short *)&req->reply[6]);
 818                                 voltage = (req->reply[8] << 8) | req->reply[9];
 819                                 break;
 820                         default:
 821                                 pr_warn("pmu.c: unrecognized battery info, "
 822                                         "len: %d, %4ph\n", req->reply_len,
 823                                                            req->reply);
 824                                 break;
 825                 }
 826         }
 827
 828         if ((req->reply[1] & 0x01) && (amperage > 0))
 829                 bat_flags |= PMU_BATT_CHARGING;
 830
 831         pmu_batteries[pmu_cur_battery].flags = bat_flags;
 832         pmu_batteries[pmu_cur_battery].charge = capa;
 833         pmu_batteries[pmu_cur_battery].max_charge = max;
 834         pmu_batteries[pmu_cur_battery].amperage = amperage;
 835         pmu_batteries[pmu_cur_battery].voltage = voltage;
 836         if (amperage) {
 837                 if ((req->reply[1] & 0x01) && (amperage > 0))
 838                         pmu_batteries[pmu_cur_battery].time_remaining
 839                                 = ((max-capa) * 3600) / amperage;
 840                 else
 841                         pmu_batteries[pmu_cur_battery].time_remaining
 842                                 = (capa * 3600) / (-amperage);
 843         } else
 844                 pmu_batteries[pmu_cur_battery].time_remaining = 0;
 845
 846         pmu_cur_battery = (pmu_cur_battery + 1) % pmu_battery_count;
 847
 848         clear_bit(0, &async_req_locks);
 849 }
 850
 851 static void
 852 query_battery_state(void)
 853 {
 854         if (test_and_set_bit(0, &async_req_locks))
 855                 return;
 856         if (pmu_kind == PMU_OHARE_BASED)
 857                 pmu_request(&batt_req, done_battery_state_ohare,
 858                         1, PMU_BATTERY_STATE);
 859         else
 860                 pmu_request(&batt_req, done_battery_state_smart,
 861                         2, PMU_SMART_BATTERY_STATE, pmu_cur_battery+1);
 862 }
 863
 864 static int pmu_info_proc_show(struct seq_file *m, void *v)
 865 {
 866         seq_printf(m, "PMU driver version     : %d\n", PMU_DRIVER_VERSION);
 867         seq_printf(m, "PMU firmware version   : %02x\n", pmu_version);
 868         seq_printf(m, "AC Power               : %d\n",
 869                 ((pmu_power_flags & PMU_PWR_AC_PRESENT) != 0) || pmu_battery_count == 0);
 870         seq_printf(m, "Battery count          : %d\n", pmu_battery_count);
 871
 872         return 0;
 873 }
 874
 875 static int pmu_irqstats_proc_show(struct seq_file *m, void *v)
 876 {
 877         int i;
 878         static const char *irq_names[NUM_IRQ_STATS] = {
 879                 "Unknown interrupt (type 0)",
 880                 "Unknown interrupt (type 1)",
 881                 "PC-Card eject button",
 882                 "Sound/Brightness button",
 883                 "ADB message",
 884                 "Battery state change",
 885                 "Environment interrupt",
 886                 "Tick timer",
 887                 "Ghost interrupt (zero len)",
 888                 "Empty interrupt (empty mask)",
 889                 "Max irqs in a row",
 890                 "Total CB1 triggered events",
 891                 "Total GPIO1 triggered events",
 892         };
 893
 894         for (i = 0; i < NUM_IRQ_STATS; i++) {
 895                 seq_printf(m, " %2u: %10u (%s)\n",
 896                              i, pmu_irq_stats[i], irq_names[i]);
 897         }
 898         return 0;
 899 }
 900
 901 static int pmu_battery_proc_show(struct seq_file *m, void *v)
 902 {
 903         long batnum = (long)m->private;
 904
 905         seq_putc(m, '\n');
 906         seq_printf(m, "flags      : %08x\n", pmu_batteries[batnum].flags);
 907         seq_printf(m, "charge     : %d\n", pmu_batteries[batnum].charge);
 908         seq_printf(m, "max_charge : %d\n", pmu_batteries[batnum].max_charge);
 909         seq_printf(m, "current    : %d\n", pmu_batteries[batnum].amperage);
 910         seq_printf(m, "voltage    : %d\n", pmu_batteries[batnum].voltage);
 911         seq_printf(m, "time rem.  : %d\n", pmu_batteries[batnum].time_remaining);
 912         return 0;
 913 }
 914
 915 static int pmu_options_proc_show(struct seq_file *m, void *v)
 916 {
 917 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 918         if (pmu_kind == PMU_KEYLARGO_BASED &&
 919             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 920                 seq_printf(m, "lid_wakeup=%d\n", option_lid_wakeup);
 921 #endif
 922         if (pmu_kind == PMU_KEYLARGO_BASED)
 923                 seq_printf(m, "server_mode=%d\n", option_server_mode);
 924
 925         return 0;
 926 }
 927
 928 static int pmu_options_proc_open(struct inode *inode, struct file *file)
 929 {
 930         return single_open(file, pmu_options_proc_show, NULL);
 931 }
 932
 933 static ssize_t pmu_options_proc_write(struct file *file,
 934                 const char __user *buffer, size_t count, loff_t *pos)
 935 {
 936         char tmp[33];
 937         char *label, *val;
 938         size_t fcount = count;
 939
 940         if (!count)
 941                 return -EINVAL;
 942         if (count > 32)
 943                 count = 32;
 944         if (copy_from_user(tmp, buffer, count))
 945                 return -EFAULT;
 946         tmp[count] = 0;
 947
 948         label = tmp;
 949         while(*label == ' ')
 950                 label++;
 951         val = label;
 952         while(*val && (*val != '=')) {
 953                 if (*val == ' ')
 954                         *val = 0;
 955                 val++;
 956         }
 957         if ((*val) == 0)
 958                 return -EINVAL;
 959         *(val++) = 0;
 960         while(*val == ' ')
 961                 val++;
 962 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
 963         if (pmu_kind == PMU_KEYLARGO_BASED &&
 964             pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) >= 0)
 965                 if (!strcmp(label, "lid_wakeup"))
 966                         option_lid_wakeup = ((*val) == '1');
 967 #endif
 968         if (pmu_kind == PMU_KEYLARGO_BASED && !strcmp(label, "server_mode")) {
 969                 int new_value;
 970                 new_value = ((*val) == '1');
 971                 if (new_value != option_server_mode)
 972                         pmu_set_server_mode(new_value);
 973         }
 974         return fcount;
 975 }
 976
 977 static const struct proc_ops pmu_options_proc_ops = {
 978         .proc_open      = pmu_options_proc_open,
 979         .proc_read      = seq_read,
 980         .proc_lseek     = seq_lseek,
 981         .proc_release   = single_release,
 982         .proc_write     = pmu_options_proc_write,
 983 };
 984
 985 #ifdef CONFIG_ADB
 986 /* Send an ADB command */
 987 static int pmu_send_request(struct adb_request *req, int sync)
 988 {
 989         int i, ret;
 990
 991         if (pmu_state == uninitialized || !pmu_fully_inited) {
 992                 req->complete = 1;
 993                 return -ENXIO;
 994         }
 995
 996         ret = -EINVAL;
 997
 998         switch (req->data[0]) {
 999         case PMU_PACKET:
1000                 for (i = 0; i < req->nbytes - 1; ++i)
1001                         req->data[i] = req->data[i+1];
1002                 --req->nbytes;
1003                 if (pmu_data_len[req->data[0]][1] != 0) {
1004                         req->reply[0] = ADB_RET_OK;
1005                         req->reply_len = 1;
1006                 } else
1007                         req->reply_len = 0;
1008                 ret = pmu_queue_request(req);
1009                 break;
1010         case CUDA_PACKET:
1011                 switch (req->data[1]) {
1012                 case CUDA_GET_TIME:
1013                         if (req->nbytes != 2)
1014                                 break;
1015                         req->data[0] = PMU_READ_RTC;
1016                         req->nbytes = 1;
1017                         req->reply_len = 3;
1018                         req->reply[0] = CUDA_PACKET;
1019                         req->reply[1] = 0;
1020                         req->reply[2] = CUDA_GET_TIME;
1021                         ret = pmu_queue_request(req);
1022                         break;
1023                 case CUDA_SET_TIME:
1024                         if (req->nbytes != 6)
1025                                 break;
1026                         req->data[0] = PMU_SET_RTC;
1027                         req->nbytes = 5;
1028                         for (i = 1; i <= 4; ++i)
1029                                 req->data[i] = req->data[i+1];
1030                         req->reply_len = 3;
1031                         req->reply[0] = CUDA_PACKET;
1032                         req->reply[1] = 0;
1033                         req->reply[2] = CUDA_SET_TIME;
1034                         ret = pmu_queue_request(req);
1035                         break;
1036                 }
1037                 break;
1038         case ADB_PACKET:
1039                 if (!pmu_has_adb)
1040                         return -ENXIO;
1041                 for (i = req->nbytes - 1; i > 1; --i)
1042                         req->data[i+2] = req->data[i];
1043                 req->data[3] = req->nbytes - 2;
1044                 req->data[2] = pmu_adb_flags;
1045                 /*req->data[1] = req->data[1];*/
1046                 req->data[0] = PMU_ADB_CMD;
1047                 req->nbytes += 2;
1048                 req->reply_expected = 1;
1049                 req->reply_len = 0;
1050                 ret = pmu_queue_request(req);
1051                 break;
1052         }
1053         if (ret) {
1054                 req->complete = 1;
1055                 return ret;
1056         }
1057
1058         if (sync)
1059                 while (!req->complete)
1060                         pmu_poll();
1061
1062         return 0;
1063 }
1064
1065 /* Enable/disable autopolling */
1066 static int __pmu_adb_autopoll(int devs)
1067 {
1068         struct adb_request req;
1069
1070         if (devs) {
1071                 pmu_request(&req, NULL, 5, PMU_ADB_CMD, 0, 0x86,
1072                             adb_dev_map >> 8, adb_dev_map);
1073                 pmu_adb_flags = 2;
1074         } else {
1075                 pmu_request(&req, NULL, 1, PMU_ADB_POLL_OFF);
1076                 pmu_adb_flags = 0;
1077         }
1078         while (!req.complete)
1079                 pmu_poll();
1080         return 0;
1081 }
1082
1083 static int pmu_adb_autopoll(int devs)
1084 {
1085         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1086                 return -ENXIO;
1087
1088         adb_dev_map = devs;
1089         return __pmu_adb_autopoll(devs);
1090 }
1091
1092 /* Reset the ADB bus */
1093 static int pmu_adb_reset_bus(void)
1094 {
1095         struct adb_request req;
1096         int save_autopoll = adb_dev_map;
1097
1098         if (pmu_state == uninitialized || !pmu_fully_inited || !pmu_has_adb)
1099                 return -ENXIO;
1100
1101         /* anyone got a better idea?? */
1102         __pmu_adb_autopoll(0);
1103
1104         req.nbytes = 4;
1105         req.done = NULL;
1106         req.data[0] = PMU_ADB_CMD;
1107         req.data[1] = ADB_BUSRESET;
1108         req.data[2] = 0;
1109         req.data[3] = 0;
1110         req.data[4] = 0;
1111         req.reply_len = 0;
1112         req.reply_expected = 1;
1113         if (pmu_queue_request(&req) != 0) {
1114                 printk(KERN_ERR "pmu_adb_reset_bus: pmu_queue_request failed\n");
1115                 return -EIO;
1116         }
1117         pmu_wait_complete(&req);
1118
1119         if (save_autopoll != 0)
1120                 __pmu_adb_autopoll(save_autopoll);
1121
1122         return 0;
1123 }
1124 #endif /* CONFIG_ADB */
1125
1126 /* Construct and send a pmu request */
1127 int
1128 pmu_request(struct adb_request *req, void (*done)(struct adb_request *),
1129             int nbytes, ...)
1130 {
1131         va_list list;
1132         int i;
1133
1134         if (pmu_state == uninitialized)
1135                 return -ENXIO;
1136
1137         if (nbytes < 0 || nbytes > 32) {
1138                 printk(KERN_ERR "pmu_request: bad nbytes (%d)\n", nbytes);
1139                 req->complete = 1;
1140                 return -EINVAL;
1141         }
1142         req->nbytes = nbytes;
1143         req->done = done;
1144         va_start(list, nbytes);
1145         for (i = 0; i < nbytes; ++i)
1146                 req->data[i] = va_arg(list, int);
1147         va_end(list);
1148         req->reply_len = 0;
1149         req->reply_expected = 0;
1150         return pmu_queue_request(req);
1151 }
1152
1153 int
1154 pmu_queue_request(struct adb_request *req)
1155 {
1156         unsigned long flags;
1157         int nsend;
1158
1159         if (pmu_state == uninitialized) {
1160                 req->complete = 1;
1161                 return -ENXIO;
1162         }
1163         if (req->nbytes <= 0) {
1164                 req->complete = 1;
1165                 return 0;
1166         }
1167         nsend = pmu_data_len[req->data[0]][0];
1168         if (nsend >= 0 && req->nbytes != nsend + 1) {
1169                 req->complete = 1;
1170                 return -EINVAL;
1171         }
1172
1173         req->next = NULL;
1174         req->sent = 0;
1175         req->complete = 0;
1176
1177         spin_lock_irqsave(&pmu_lock, flags);
1178         if (current_req) {
1179                 last_req->next = req;
1180                 last_req = req;
1181         } else {
1182                 current_req = req;
1183                 last_req = req;
1184                 if (pmu_state == idle)
1185                         pmu_start();
1186         }
1187         spin_unlock_irqrestore(&pmu_lock, flags);
1188
1189         return 0;
1190 }
1191
1192 static inline void
1193 wait_for_ack(void)
1194 {
1195         /* Sightly increased the delay, I had one occurrence of the message
1196          * reported
1197          */
1198         int timeout = 4000;
1199         while ((in_8(&via2[B]) & TACK) == 0) {
1200                 if (--timeout < 0) {
1201                         printk(KERN_ERR "PMU not responding (!ack)\n");
1202                         return;
1203                 }
1204                 udelay(10);
1205         }
1206 }
1207
1208 /* New PMU seems to be very sensitive to those timings, so we make sure
1209  * PCI is flushed immediately */
1210 static inline void
1211 send_byte(int x)
1212 {
1213         out_8(&via1[ACR], in_8(&via1[ACR]) | SR_OUT | SR_EXT);
1214         out_8(&via1[SR], x);
1215         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);        /* assert TREQ */
1216         (void)in_8(&via2[B]);
1217 }
1218
1219 static inline void
1220 recv_byte(void)
1221 {
1222         out_8(&via1[ACR], (in_8(&via1[ACR]) & ~SR_OUT) | SR_EXT);
1223         in_8(&via1[SR]);                /* resets SR */
1224         out_8(&via2[B], in_8(&via2[B]) & ~TREQ);
1225         (void)in_8(&via2[B]);
1226 }
1227
1228 static inline void
1229 pmu_done(struct adb_request *req)
1230 {
1231         void (*done)(struct adb_request *) = req->done;
1232         mb();
1233         req->complete = 1;
1234         /* Here, we assume that if the request has a done member, the
1235          * struct request will survive to setting req->complete to 1
1236          */
1237         if (done)
1238                 (*done)(req);
1239 }
1240
1241 static void
1242 pmu_start(void)
1243 {
1244         struct adb_request *req;
1245
1246         /* assert pmu_state == idle */
1247         /* get the packet to send */
1248         req = current_req;
1249         if (!req || pmu_state != idle
1250             || (/*req->reply_expected && */req_awaiting_reply))
1251                 return;
1252
1253         pmu_state = sending;
1254         data_index = 1;
1255         data_len = pmu_data_len[req->data[0]][0];
1256
1257         /* Sounds safer to make sure ACK is high before writing. This helped
1258          * kill a problem with ADB and some iBooks
1259          */
1260         wait_for_ack();
1261         /* set the shift register to shift out and send a byte */
1262         send_byte(req->data[0]);
1263 }
1264
1265 void
1266 pmu_poll(void)
1267 {
1268         if (pmu_state == uninitialized)
1269                 return;
1270         if (disable_poll)
1271                 return;
1272         via_pmu_interrupt(0, NULL);
1273 }
1274
1275 void
1276 pmu_poll_adb(void)
1277 {
1278         if (pmu_state == uninitialized)
1279                 return;
1280         if (disable_poll)
1281                 return;
1282         /* Kicks ADB read when PMU is suspended */
1283         adb_int_pending = 1;
1284         do {
1285                 via_pmu_interrupt(0, NULL);
1286         } while (pmu_suspended && (adb_int_pending || pmu_state != idle
1287                 || req_awaiting_reply));
1288 }
1289
1290 void
1291 pmu_wait_complete(struct adb_request *req)
1292 {
1293         if (pmu_state == uninitialized)
1294                 return;
1295         while((pmu_state != idle && pmu_state != locked) || !req->complete)
1296                 via_pmu_interrupt(0, NULL);
1297 }
1298
1299 /* This function loops until the PMU is idle and prevents it from
1300  * anwsering to ADB interrupts. pmu_request can still be called.
1301  * This is done to avoid spurrious shutdowns when we know we'll have
1302  * interrupts switched off for a long time
1303  */
1304 void
1305 pmu_suspend(void)
1306 {
1307         unsigned long flags;
1308
1309         if (pmu_state == uninitialized)
1310                 return;
1311
1312         spin_lock_irqsave(&pmu_lock, flags);
1313         pmu_suspended++;
1314         if (pmu_suspended > 1) {
1315                 spin_unlock_irqrestore(&pmu_lock, flags);
1316                 return;
1317         }
1318
1319         do {
1320                 spin_unlock_irqrestore(&pmu_lock, flags);
1321                 if (req_awaiting_reply)
1322                         adb_int_pending = 1;
1323                 via_pmu_interrupt(0, NULL);
1324                 spin_lock_irqsave(&pmu_lock, flags);
1325                 if (!adb_int_pending && pmu_state == idle && !req_awaiting_reply) {
1326                         if (gpio_irq >= 0)
1327                                 disable_irq_nosync(gpio_irq);
1328                         out_8(&via1[IER], CB1_INT | IER_CLR);
1329                         spin_unlock_irqrestore(&pmu_lock, flags);
1330                         break;
1331                 }
1332         } while (1);
1333 }
1334
1335 void
1336 pmu_resume(void)
1337 {
1338         unsigned long flags;
1339
1340         if (pmu_state == uninitialized || pmu_suspended < 1)
1341                 return;
1342
1343         spin_lock_irqsave(&pmu_lock, flags);
1344         pmu_suspended--;
1345         if (pmu_suspended > 0) {
1346                 spin_unlock_irqrestore(&pmu_lock, flags);
1347                 return;
1348         }
1349         adb_int_pending = 1;
1350         if (gpio_irq >= 0)
1351                 enable_irq(gpio_irq);
1352         out_8(&via1[IER], CB1_INT | IER_SET);
1353         spin_unlock_irqrestore(&pmu_lock, flags);
1354         pmu_poll();
1355 }
1356
1357 /* Interrupt data could be the result data from an ADB cmd */
1358 static void
1359 pmu_handle_data(unsigned char *data, int len)
1360 {
1361         unsigned char ints;
1362         int idx;
1363         int i = 0;
1364
1365         asleep = 0;
1366         if (drop_interrupts || len < 1) {
1367                 adb_int_pending = 0;
1368                 pmu_irq_stats[8]++;
1369                 return;
1370         }
1371
1372         /* Get PMU interrupt mask */
1373         ints = data[0];
1374
1375         /* Record zero interrupts for stats */
1376         if (ints == 0)
1377                 pmu_irq_stats[9]++;
1378
1379         /* Hack to deal with ADB autopoll flag */
1380         if (ints & PMU_INT_ADB)
1381                 ints &= ~(PMU_INT_ADB_AUTO | PMU_INT_AUTO_SRQ_POLL);
1382
1383 next:
1384         if (ints == 0) {
1385                 if (i > pmu_irq_stats[10])
1386                         pmu_irq_stats[10] = i;
1387                 return;
1388         }
1389         i++;
1390
1391         idx = ffs(ints) - 1;
1392         ints &= ~BIT(idx);
1393
1394         pmu_irq_stats[idx]++;
1395
1396         /* Note: for some reason, we get an interrupt with len=1,
1397          * data[0]==0 after each normal ADB interrupt, at least
1398          * on the Pismo. Still investigating...  --BenH
1399          */
1400         switch (BIT(idx)) {
1401         case PMU_INT_ADB:
1402                 if ((data[0] & PMU_INT_ADB_AUTO) == 0) {
1403                         struct adb_request *req = req_awaiting_reply;
1404                         if (!req) {
1405                                 printk(KERN_ERR "PMU: extra ADB reply\n");
1406                                 return;
1407                         }
1408                         req_awaiting_reply = NULL;
1409                         if (len <= 2)
1410                                 req->reply_len = 0;
1411                         else {
1412                                 memcpy(req->reply, data + 1, len - 1);
1413                                 req->reply_len = len - 1;
1414                         }
1415                         pmu_done(req);
1416                 } else {
1417 #ifdef CONFIG_XMON
1418                         if (len == 4 && data[1] == 0x2c) {
1419                                 extern int xmon_wants_key, xmon_adb_keycode;
1420                                 if (xmon_wants_key) {
1421                                         xmon_adb_keycode = data[2];
1422                                         return;
1423                                 }
1424                         }
1425 #endif /* CONFIG_XMON */
1426 #ifdef CONFIG_ADB
1427                         /*
1428                          * XXX On the [23]400 the PMU gives us an up
1429                          * event for keycodes 0x74 or 0x75 when the PC
1430                          * card eject buttons are released, so we
1431                          * ignore those events.
1432                          */
1433                         if (!(pmu_kind == PMU_OHARE_BASED && len == 4
1434                               && data[1] == 0x2c && data[3] == 0xff
1435                               && (data[2] & ~1) == 0xf4))
1436                                 adb_input(data+1, len-1, 1);
1437 #endif /* CONFIG_ADB */
1438                 }
1439                 break;
1440
1441         /* Sound/brightness button pressed */
1442         case PMU_INT_SNDBRT:
1443 #ifdef CONFIG_PMAC_BACKLIGHT
1444                 if (len == 3)
1445                         pmac_backlight_set_legacy_brightness_pmu(data[1] >> 4);
1446 #endif
1447                 break;
1448
1449         /* Tick interrupt */
1450         case PMU_INT_TICK:
1451                 /* Environment or tick interrupt, query batteries */
1452                 if (pmu_battery_count) {
1453                         if ((--query_batt_timer) == 0) {
1454                                 query_battery_state();
1455                                 query_batt_timer = BATTERY_POLLING_COUNT;
1456                         }
1457                 }
1458                 break;
1459
1460         case PMU_INT_ENVIRONMENT:
1461                 if (pmu_battery_count)
1462                         query_battery_state();
1463                 pmu_pass_intr(data, len);
1464                 /* len == 6 is probably a bad check. But how do I
1465                  * know what PMU versions send what events here? */
1466                 if (len == 6) {
1467                         via_pmu_event(PMU_EVT_POWER, !!(data[1]&8));
1468                         via_pmu_event(PMU_EVT_LID, data[1]&1);
1469                 }
1470                 break;
1471
1472         default:
1473                pmu_pass_intr(data, len);
1474         }
1475         goto next;
1476 }
1477
1478 static struct adb_request*
1479 pmu_sr_intr(void)
1480 {
1481         struct adb_request *req;
1482         int bite = 0;
1483
1484         if (in_8(&via2[B]) & TREQ) {
1485                 printk(KERN_ERR "PMU: spurious SR intr (%x)\n", in_8(&via2[B]));
1486                 return NULL;
1487         }
1488         /* The ack may not yet be low when we get the interrupt */
1489         while ((in_8(&via2[B]) & TACK) != 0)
1490                         ;
1491
1492         /* if reading grab the byte, and reset the interrupt */
1493         if (pmu_state == reading || pmu_state == reading_intr)
1494                 bite = in_8(&via1[SR]);
1495
1496         /* reset TREQ and wait for TACK to go high */
1497         out_8(&via2[B], in_8(&via2[B]) | TREQ);
1498         wait_for_ack();
1499
1500         switch (pmu_state) {
1501         case sending:
1502                 req = current_req;
1503                 if (data_len < 0) {
1504                         data_len = req->nbytes - 1;
1505                         send_byte(data_len);
1506                         break;
1507                 }
1508                 if (data_index <= data_len) {
1509                         send_byte(req->data[data_index++]);
1510                         break;
1511                 }
1512                 req->sent = 1;
1513                 data_len = pmu_data_len[req->data[0]][1];
1514                 if (data_len == 0) {
1515                         pmu_state = idle;
1516                         current_req = req->next;
1517                         if (req->reply_expected)
1518                                 req_awaiting_reply = req;
1519                         else
1520                                 return req;
1521                 } else {
1522                         pmu_state = reading;
1523                         data_index = 0;
1524                         reply_ptr = req->reply + req->reply_len;
1525                         recv_byte();
1526                 }
1527                 break;
1528
1529         case intack:
1530                 data_index = 0;
1531                 data_len = -1;
1532                 pmu_state = reading_intr;
1533                 reply_ptr = interrupt_data[int_data_last];
1534                 recv_byte();
1535                 if (gpio_irq >= 0 && !gpio_irq_enabled) {
1536                         enable_irq(gpio_irq);
1537                         gpio_irq_enabled = 1;
1538                 }
1539                 break;
1540
1541         case reading:
1542         case reading_intr:
1543                 if (data_len == -1) {
1544                         data_len = bite;
1545                         if (bite > 32)
1546                                 printk(KERN_ERR "PMU: bad reply len %d\n", bite);
1547                 } else if (data_index < 32) {
1548                         reply_ptr[data_index++] = bite;
1549                 }
1550                 if (data_index < data_len) {
1551                         recv_byte();
1552                         break;
1553                 }
1554
1555                 if (pmu_state == reading_intr) {
1556                         pmu_state = idle;
1557                         int_data_state[int_data_last] = int_data_ready;
1558                         interrupt_data_len[int_data_last] = data_len;
1559                 } else {
1560                         req = current_req;
1561                         /*
1562                          * For PMU sleep and freq change requests, we lock the
1563                          * PMU until it's explicitly unlocked. This avoids any
1564                          * spurrious event polling getting in
1565                          */
1566                         current_req = req->next;
1567                         req->reply_len += data_index;
1568                         if (req->data[0] == PMU_SLEEP || req->data[0] == PMU_CPU_SPEED)
1569                                 pmu_state = locked;
1570                         else
1571                                 pmu_state = idle;
1572                         return req;
1573                 }
1574                 break;
1575
1576         default:
1577                 printk(KERN_ERR "via_pmu_interrupt: unknown state %d?\n",
1578                        pmu_state);
1579         }
1580         return NULL;
1581 }
1582
1583 static irqreturn_t
1584 via_pmu_interrupt(int irq, void *arg)
1585 {
1586         unsigned long flags;
1587         int intr;
1588         int nloop = 0;
1589         int int_data = -1;
1590         struct adb_request *req = NULL;
1591         int handled = 0;
1592
1593         /* This is a bit brutal, we can probably do better */
1594         spin_lock_irqsave(&pmu_lock, flags);
1595         ++disable_poll;
1596
1597         for (;;) {
1598                 /* On 68k Macs, VIA interrupts are dispatched individually.
1599                  * Unless we are polling, the relevant IRQ flag has already
1600                  * been cleared.
1601                  */
1602                 intr = 0;
1603                 if (IS_ENABLED(CONFIG_PPC_PMAC) || !irq) {
1604                         intr = in_8(&via1[IFR]) & (SR_INT | CB1_INT);
1605                         out_8(&via1[IFR], intr);
1606                 }
1607 #ifndef CONFIG_PPC_PMAC
1608                 switch (irq) {
1609                 case IRQ_MAC_ADB_CL:
1610                         intr = CB1_INT;
1611                         break;
1612                 case IRQ_MAC_ADB_SR:
1613                         intr = SR_INT;
1614                         break;
1615                 }
1616 #endif
1617                 if (intr == 0)
1618                         break;
1619                 handled = 1;
1620                 if (++nloop > 1000) {
1621                         printk(KERN_DEBUG "PMU: stuck in intr loop, "
1622                                "intr=%x, ier=%x pmu_state=%d\n",
1623                                intr, in_8(&via1[IER]), pmu_state);
1624                         break;
1625                 }
1626                 if (intr & CB1_INT) {
1627                         adb_int_pending = 1;
1628                         pmu_irq_stats[11]++;
1629                 }
1630                 if (intr & SR_INT) {
1631                         req = pmu_sr_intr();
1632                         if (req)
1633                                 break;
1634                 }
1635 #ifndef CONFIG_PPC_PMAC
1636                 break;
1637 #endif
1638         }
1639
1640 recheck:
1641         if (pmu_state == idle) {
1642                 if (adb_int_pending) {
1643                         if (int_data_state[0] == int_data_empty)
1644                                 int_data_last = 0;
1645                         else if (int_data_state[1] == int_data_empty)
1646                                 int_data_last = 1;
1647                         else
1648                                 goto no_free_slot;
1649                         pmu_state = intack;
1650                         int_data_state[int_data_last] = int_data_fill;
1651                         /* Sounds safer to make sure ACK is high before writing.
1652                          * This helped kill a problem with ADB and some iBooks
1653                          */
1654                         wait_for_ack();
1655                         send_byte(PMU_INT_ACK);
1656                         adb_int_pending = 0;
1657                 } else if (current_req)
1658                         pmu_start();
1659         }
1660 no_free_slot:
1661         /* Mark the oldest buffer for flushing */
1662         if (int_data_state[!int_data_last] == int_data_ready) {
1663                 int_data_state[!int_data_last] = int_data_flush;
1664                 int_data = !int_data_last;
1665         } else if (int_data_state[int_data_last] == int_data_ready) {
1666                 int_data_state[int_data_last] = int_data_flush;
1667                 int_data = int_data_last;
1668         }
1669         --disable_poll;
1670         spin_unlock_irqrestore(&pmu_lock, flags);
1671
1672         /* Deal with completed PMU requests outside of the lock */
1673         if (req) {
1674                 pmu_done(req);
1675                 req = NULL;
1676         }
1677
1678         /* Deal with interrupt datas outside of the lock */
1679         if (int_data >= 0) {
1680                 pmu_handle_data(interrupt_data[int_data], interrupt_data_len[int_data]);
1681                 spin_lock_irqsave(&pmu_lock, flags);
1682                 ++disable_poll;
1683                 int_data_state[int_data] = int_data_empty;
1684                 int_data = -1;
1685                 goto recheck;
1686         }
1687
1688         return IRQ_RETVAL(handled);
1689 }
1690
1691 void
1692 pmu_unlock(void)
1693 {
1694         unsigned long flags;
1695
1696         spin_lock_irqsave(&pmu_lock, flags);
1697         if (pmu_state == locked)
1698                 pmu_state = idle;
1699         adb_int_pending = 1;
1700         spin_unlock_irqrestore(&pmu_lock, flags);
1701 }
1702
1703
1704 static __maybe_unused irqreturn_t
1705 gpio1_interrupt(int irq, void *arg)
1706 {
1707         unsigned long flags;
1708
1709         if ((in_8(gpio_reg + 0x9) & 0x02) == 0) {
1710                 spin_lock_irqsave(&pmu_lock, flags);
1711                 if (gpio_irq_enabled > 0) {
1712                         disable_irq_nosync(gpio_irq);
1713                         gpio_irq_enabled = 0;
1714                 }
1715                 pmu_irq_stats[12]++;
1716                 adb_int_pending = 1;
1717                 spin_unlock_irqrestore(&pmu_lock, flags);
1718                 via_pmu_interrupt(0, NULL);
1719                 return IRQ_HANDLED;
1720         }
1721         return IRQ_NONE;
1722 }
1723
1724 void
1725 pmu_enable_irled(int on)
1726 {
1727         struct adb_request req;
1728
1729         if (pmu_state == uninitialized)
1730                 return ;
1731         if (pmu_kind == PMU_KEYLARGO_BASED)
1732                 return ;
1733
1734         pmu_request(&req, NULL, 2, PMU_POWER_CTRL, PMU_POW_IRLED |
1735             (on ? PMU_POW_ON : PMU_POW_OFF));
1736         pmu_wait_complete(&req);
1737 }
1738
1739 /* Offset between Unix time (1970-based) and Mac time (1904-based) */
1740 #define RTC_OFFSET      2082844800
1741
1742 time64_t pmu_get_time(void)
1743 {
1744         struct adb_request req;
1745         u32 now;
1746
1747         if (pmu_request(&req, NULL, 1, PMU_READ_RTC) < 0)
1748                 return 0;
1749         pmu_wait_complete(&req);
1750         if (req.reply_len != 4)
1751                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1752         now = (req.reply[0] << 24) + (req.reply[1] << 16) +
1753               (req.reply[2] << 8) + req.reply[3];
1754         return (time64_t)now - RTC_OFFSET;
1755 }
1756
1757 int pmu_set_rtc_time(struct rtc_time *tm)
1758 {
1759         u32 now;
1760         struct adb_request req;
1761
1762         now = lower_32_bits(rtc_tm_to_time64(tm) + RTC_OFFSET);
1763         if (pmu_request(&req, NULL, 5, PMU_SET_RTC,
1764                         now >> 24, now >> 16, now >> 8, now) < 0)
1765                 return -ENXIO;
1766         pmu_wait_complete(&req);
1767         if (req.reply_len != 0)
1768                 pr_err("%s: got %d byte reply\n", __func__, req.reply_len);
1769         return 0;
1770 }
1771
1772 void
1773 pmu_restart(void)
1774 {
1775         struct adb_request req;
1776
1777         if (pmu_state == uninitialized)
1778                 return;
1779
1780         local_irq_disable();
1781
1782         drop_interrupts = 1;
1783
1784         if (pmu_kind != PMU_KEYLARGO_BASED) {
1785                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1786                                                 PMU_INT_TICK );
1787                 while(!req.complete)
1788                         pmu_poll();
1789         }
1790
1791         pmu_request(&req, NULL, 1, PMU_RESET);
1792         pmu_wait_complete(&req);
1793         for (;;)
1794                 ;
1795 }
1796
1797 void
1798 pmu_shutdown(void)
1799 {
1800         struct adb_request req;
1801
1802         if (pmu_state == uninitialized)
1803                 return;
1804
1805         local_irq_disable();
1806
1807         drop_interrupts = 1;
1808
1809         if (pmu_kind != PMU_KEYLARGO_BASED) {
1810                 pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, PMU_INT_ADB |
1811                                                 PMU_INT_TICK );
1812                 pmu_wait_complete(&req);
1813         } else {
1814                 /* Disable server mode on shutdown or we'll just
1815                  * wake up again
1816                  */
1817                 pmu_set_server_mode(0);
1818         }
1819
1820         pmu_request(&req, NULL, 5, PMU_SHUTDOWN,
1821                     'M', 'A', 'T', 'T');
1822         pmu_wait_complete(&req);
1823         for (;;)
1824                 ;
1825 }
1826
1827 int
1828 pmu_present(void)
1829 {
1830         return pmu_state != uninitialized;
1831 }
1832
1833 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
1834 /*
1835  * Put the powerbook to sleep.
1836  */
1837
1838 static u32 save_via[8];
1839
1840 static void
1841 save_via_state(void)
1842 {
1843         save_via[0] = in_8(&via1[ANH]);
1844         save_via[1] = in_8(&via1[DIRA]);
1845         save_via[2] = in_8(&via1[B]);
1846         save_via[3] = in_8(&via1[DIRB]);
1847         save_via[4] = in_8(&via1[PCR]);
1848         save_via[5] = in_8(&via1[ACR]);
1849         save_via[6] = in_8(&via1[T1CL]);
1850         save_via[7] = in_8(&via1[T1CH]);
1851 }
1852 static void
1853 restore_via_state(void)
1854 {
1855         out_8(&via1[ANH],  save_via[0]);
1856         out_8(&via1[DIRA], save_via[1]);
1857         out_8(&via1[B],    save_via[2]);
1858         out_8(&via1[DIRB], save_via[3]);
1859         out_8(&via1[PCR],  save_via[4]);
1860         out_8(&via1[ACR],  save_via[5]);
1861         out_8(&via1[T1CL], save_via[6]);
1862         out_8(&via1[T1CH], save_via[7]);
1863         out_8(&via1[IER], IER_CLR | 0x7f);      /* disable all intrs */
1864         out_8(&via1[IFR], 0x7f);                        /* clear IFR */
1865         out_8(&via1[IER], IER_SET | SR_INT | CB1_INT);
1866 }
1867
1868 #define GRACKLE_PM      (1<<7)
1869 #define GRACKLE_DOZE    (1<<5)
1870 #define GRACKLE_NAP     (1<<4)
1871 #define GRACKLE_SLEEP   (1<<3)
1872
1873 static int powerbook_sleep_grackle(void)
1874 {
1875         unsigned long save_l2cr;
1876         unsigned short pmcr1;
1877         struct adb_request req;
1878         struct pci_dev *grackle;
1879
1880         grackle = pci_get_domain_bus_and_slot(0, 0, 0);
1881         if (!grackle)
1882                 return -ENODEV;
1883
1884         /* Turn off various things. Darwin does some retry tests here... */
1885         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0, PMU_POW0_OFF|PMU_POW0_HARD_DRIVE);
1886         pmu_wait_complete(&req);
1887         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1888                 PMU_POW_OFF|PMU_POW_BACKLIGHT|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1889         pmu_wait_complete(&req);
1890
1891         /* For 750, save backside cache setting and disable it */
1892         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1893
1894         if (!__fake_sleep) {
1895                 /* Ask the PMU to put us to sleep */
1896                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1897                 pmu_wait_complete(&req);
1898         }
1899
1900         /* The VIA is supposed not to be restored correctly*/
1901         save_via_state();
1902         /* We shut down some HW */
1903         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,1);
1904
1905         pci_read_config_word(grackle, 0x70, &pmcr1);
1906         /* Apparently, MacOS uses NAP mode for Grackle ??? */
1907         pmcr1 &= ~(GRACKLE_DOZE|GRACKLE_SLEEP);
1908         pmcr1 |= GRACKLE_PM|GRACKLE_NAP;
1909         pci_write_config_word(grackle, 0x70, pmcr1);
1910
1911         /* Call low-level ASM sleep handler */
1912         if (__fake_sleep)
1913                 mdelay(5000);
1914         else
1915                 low_sleep_handler();
1916
1917         /* We're awake again, stop grackle PM */
1918         pci_read_config_word(grackle, 0x70, &pmcr1);
1919         pmcr1 &= ~(GRACKLE_PM|GRACKLE_DOZE|GRACKLE_SLEEP|GRACKLE_NAP);
1920         pci_write_config_word(grackle, 0x70, pmcr1);
1921
1922         pci_dev_put(grackle);
1923
1924         /* Make sure the PMU is idle */
1925         pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,0);
1926         restore_via_state();
1927
1928         /* Restore L2 cache */
1929         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
1930                 _set_L2CR(save_l2cr);
1931
1932         /* Restore userland MMU context */
1933         switch_mmu_context(NULL, current->active_mm, NULL);
1934
1935         /* Power things up */
1936         pmu_unlock();
1937         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
1938         pmu_wait_complete(&req);
1939         pmu_request(&req, NULL, 2, PMU_POWER_CTRL0,
1940                         PMU_POW0_ON|PMU_POW0_HARD_DRIVE);
1941         pmu_wait_complete(&req);
1942         pmu_request(&req, NULL, 2, PMU_POWER_CTRL,
1943                         PMU_POW_ON|PMU_POW_BACKLIGHT|PMU_POW_CHARGER|PMU_POW_IRLED|PMU_POW_MEDIABAY);
1944         pmu_wait_complete(&req);
1945
1946         return 0;
1947 }
1948
1949 static int
1950 powerbook_sleep_Core99(void)
1951 {
1952         unsigned long save_l2cr;
1953         unsigned long save_l3cr;
1954         struct adb_request req;
1955
1956         if (pmac_call_feature(PMAC_FTR_SLEEP_STATE,NULL,0,-1) < 0) {
1957                 printk(KERN_ERR "Sleep mode not supported on this machine\n");
1958                 return -ENOSYS;
1959         }
1960
1961         if (num_online_cpus() > 1 || cpu_is_offline(0))
1962                 return -EAGAIN;
1963
1964         /* Stop environment and ADB interrupts */
1965         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, 0);
1966         pmu_wait_complete(&req);
1967
1968         /* Tell PMU what events will wake us up */
1969         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_CLR_WAKEUP_EVENTS,
1970                 0xff, 0xff);
1971         pmu_wait_complete(&req);
1972         pmu_request(&req, NULL, 4, PMU_POWER_EVENTS, PMU_PWR_SET_WAKEUP_EVENTS,
1973                 0, PMU_PWR_WAKEUP_KEY |
1974                 (option_lid_wakeup ? PMU_PWR_WAKEUP_LID_OPEN : 0));
1975         pmu_wait_complete(&req);
1976
1977         /* Save the state of the L2 and L3 caches */
1978         save_l3cr = _get_L3CR();        /* (returns -1 if not available) */
1979         save_l2cr = _get_L2CR();        /* (returns -1 if not available) */
1980
1981         if (!__fake_sleep) {
1982                 /* Ask the PMU to put us to sleep */
1983                 pmu_request(&req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
1984                 pmu_wait_complete(&req);
1985         }
1986
1987         /* The VIA is supposed not to be restored correctly*/
1988         save_via_state();
1989
1990         /* Shut down various ASICs. There's a chance that we can no longer
1991          * talk to the PMU after this, so I moved it to _after_ sending the
1992          * sleep command to it. Still need to be checked.
1993          */
1994         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
1995
1996         /* Call low-level ASM sleep handler */
1997         if (__fake_sleep)
1998                 mdelay(5000);
1999         else
2000                 low_sleep_handler();
2001
2002         /* Restore Apple core ASICs state */
2003         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2004
2005         /* Restore VIA */
2006         restore_via_state();
2007
2008         /* tweak LPJ before cpufreq is there */
2009         loops_per_jiffy *= 2;
2010
2011         /* Restore video */
2012         pmac_call_early_video_resume();
2013
2014         /* Restore L2 cache */
2015         if (save_l2cr != 0xffffffff && (save_l2cr & L2CR_L2E) != 0)
2016                 _set_L2CR(save_l2cr);
2017         /* Restore L3 cache */
2018         if (save_l3cr != 0xffffffff && (save_l3cr & L3CR_L3E) != 0)
2019                 _set_L3CR(save_l3cr);
2020
2021         /* Restore userland MMU context */
2022         switch_mmu_context(NULL, current->active_mm, NULL);
2023
2024         /* Tell PMU we are ready */
2025         pmu_unlock();
2026         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2027         pmu_wait_complete(&req);
2028         pmu_request(&req, NULL, 2, PMU_SET_INTR_MASK, pmu_intr_mask);
2029         pmu_wait_complete(&req);
2030
2031         /* Restore LPJ, cpufreq will adjust the cpu frequency */
2032         loops_per_jiffy /= 2;
2033
2034         return 0;
2035 }
2036
2037 #define PB3400_MEM_CTRL         0xf8000000
2038 #define PB3400_MEM_CTRL_SLEEP   0x70
2039
2040 static void __iomem *pb3400_mem_ctrl;
2041
2042 static void powerbook_sleep_init_3400(void)
2043 {
2044         /* map in the memory controller registers */
2045         pb3400_mem_ctrl = ioremap(PB3400_MEM_CTRL, 0x100);
2046         if (pb3400_mem_ctrl == NULL)
2047                 printk(KERN_WARNING "ioremap failed: sleep won't be possible");
2048 }
2049
2050 static int powerbook_sleep_3400(void)
2051 {
2052         int i, x;
2053         unsigned int hid0;
2054         unsigned long msr;
2055         struct adb_request sleep_req;
2056         unsigned int __iomem *mem_ctrl_sleep;
2057
2058         if (pb3400_mem_ctrl == NULL)
2059                 return -ENOMEM;
2060         mem_ctrl_sleep = pb3400_mem_ctrl + PB3400_MEM_CTRL_SLEEP;
2061
2062         /* Set the memory controller to keep the memory refreshed
2063            while we're asleep */
2064         for (i = 0x403f; i >= 0x4000; --i) {
2065                 out_be32(mem_ctrl_sleep, i);
2066                 do {
2067                         x = (in_be32(mem_ctrl_sleep) >> 16) & 0x3ff;
2068                 } while (x == 0);
2069                 if (x >= 0x100)
2070                         break;
2071         }
2072
2073         /* Ask the PMU to put us to sleep */
2074         pmu_request(&sleep_req, NULL, 5, PMU_SLEEP, 'M', 'A', 'T', 'T');
2075         pmu_wait_complete(&sleep_req);
2076         pmu_unlock();
2077
2078         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 1);
2079
2080         asleep = 1;
2081
2082         /* Put the CPU into sleep mode */
2083         hid0 = mfspr(SPRN_HID0);
2084         hid0 = (hid0 & ~(HID0_NAP | HID0_DOZE)) | HID0_SLEEP;
2085         mtspr(SPRN_HID0, hid0);
2086         local_irq_enable();
2087         msr = mfmsr() | MSR_POW;
2088         while (asleep) {
2089                 mb();
2090                 mtmsr(msr);
2091                 isync();
2092         }
2093         local_irq_disable();
2094
2095         /* OK, we're awake again, start restoring things */
2096         out_be32(mem_ctrl_sleep, 0x3f);
2097         pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, 0);
2098
2099         return 0;
2100 }
2101
2102 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2103
2104 /*
2105  * Support for /dev/pmu device
2106  */
2107 #define RB_SIZE         0x10
2108 struct pmu_private {
2109         struct list_head list;
2110         int     rb_get;
2111         int     rb_put;
2112         struct rb_entry {
2113                 unsigned short len;
2114                 unsigned char data[16];
2115         }       rb_buf[RB_SIZE];
2116         wait_queue_head_t wait;
2117         spinlock_t lock;
2118 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2119         int     backlight_locker;
2120 #endif
2121 };
2122
2123 static LIST_HEAD(all_pmu_pvt);
2124 static DEFINE_SPINLOCK(all_pvt_lock);
2125
2126 static void
2127 pmu_pass_intr(unsigned char *data, int len)
2128 {
2129         struct pmu_private *pp;
2130         struct list_head *list;
2131         int i;
2132         unsigned long flags;
2133
2134         if (len > sizeof(pp->rb_buf[0].data))
2135                 len = sizeof(pp->rb_buf[0].data);
2136         spin_lock_irqsave(&all_pvt_lock, flags);
2137         for (list = &all_pmu_pvt; (list = list->next) != &all_pmu_pvt; ) {
2138                 pp = list_entry(list, struct pmu_private, list);
2139                 spin_lock(&pp->lock);
2140                 i = pp->rb_put + 1;
2141                 if (i >= RB_SIZE)
2142                         i = 0;
2143                 if (i != pp->rb_get) {
2144                         struct rb_entry *rp = &pp->rb_buf[pp->rb_put];
2145                         rp->len = len;
2146                         memcpy(rp->data, data, len);
2147                         pp->rb_put = i;
2148                         wake_up_interruptible(&pp->wait);
2149                 }
2150                 spin_unlock(&pp->lock);
2151         }
2152         spin_unlock_irqrestore(&all_pvt_lock, flags);
2153 }
2154
2155 static int
2156 pmu_open(struct inode *inode, struct file *file)
2157 {
2158         struct pmu_private *pp;
2159         unsigned long flags;
2160
2161         pp = kmalloc(sizeof(struct pmu_private), GFP_KERNEL);
2162         if (!pp)
2163                 return -ENOMEM;
2164         pp->rb_get = pp->rb_put = 0;
2165         spin_lock_init(&pp->lock);
2166         init_waitqueue_head(&pp->wait);
2167         mutex_lock(&pmu_info_proc_mutex);
2168         spin_lock_irqsave(&all_pvt_lock, flags);
2169 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2170         pp->backlight_locker = 0;
2171 #endif
2172         list_add(&pp->list, &all_pmu_pvt);
2173         spin_unlock_irqrestore(&all_pvt_lock, flags);
2174         file->private_data = pp;
2175         mutex_unlock(&pmu_info_proc_mutex);
2176         return 0;
2177 }
2178
2179 static ssize_t
2180 pmu_read(struct file *file, char __user *buf,
2181                         size_t count, loff_t *ppos)
2182 {
2183         struct pmu_private *pp = file->private_data;
2184         DECLARE_WAITQUEUE(wait, current);
2185         unsigned long flags;
2186         int ret = 0;
2187
2188         if (count < 1 || !pp)
2189                 return -EINVAL;
2190         if (!access_ok(buf, count))
2191                 return -EFAULT;
2192
2193         spin_lock_irqsave(&pp->lock, flags);
2194         add_wait_queue(&pp->wait, &wait);
2195         set_current_state(TASK_INTERRUPTIBLE);
2196
2197         for (;;) {
2198                 ret = -EAGAIN;
2199                 if (pp->rb_get != pp->rb_put) {
2200                         int i = pp->rb_get;
2201                         struct rb_entry *rp = &pp->rb_buf[i];
2202                         ret = rp->len;
2203                         spin_unlock_irqrestore(&pp->lock, flags);
2204                         if (ret > count)
2205                                 ret = count;
2206                         if (ret > 0 && copy_to_user(buf, rp->data, ret))
2207                                 ret = -EFAULT;
2208                         if (++i >= RB_SIZE)
2209                                 i = 0;
2210                         spin_lock_irqsave(&pp->lock, flags);
2211                         pp->rb_get = i;
2212                 }
2213                 if (ret >= 0)
2214                         break;
2215                 if (file->f_flags & O_NONBLOCK)
2216                         break;
2217                 ret = -ERESTARTSYS;
2218                 if (signal_pending(current))
2219                         break;
2220                 spin_unlock_irqrestore(&pp->lock, flags);
2221                 schedule();
2222                 spin_lock_irqsave(&pp->lock, flags);
2223         }
2224         __set_current_state(TASK_RUNNING);
2225         remove_wait_queue(&pp->wait, &wait);
2226         spin_unlock_irqrestore(&pp->lock, flags);
2227
2228         return ret;
2229 }
2230
2231 static ssize_t
2232 pmu_write(struct file *file, const char __user *buf,
2233                          size_t count, loff_t *ppos)
2234 {
2235         return 0;
2236 }
2237
2238 static __poll_t
2239 pmu_fpoll(struct file *filp, poll_table *wait)
2240 {
2241         struct pmu_private *pp = filp->private_data;
2242         __poll_t mask = 0;
2243         unsigned long flags;
2244
2245         if (!pp)
2246                 return 0;
2247         poll_wait(filp, &pp->wait, wait);
2248         spin_lock_irqsave(&pp->lock, flags);
2249         if (pp->rb_get != pp->rb_put)
2250                 mask |= EPOLLIN;
2251         spin_unlock_irqrestore(&pp->lock, flags);
2252         return mask;
2253 }
2254
2255 static int
2256 pmu_release(struct inode *inode, struct file *file)
2257 {
2258         struct pmu_private *pp = file->private_data;
2259         unsigned long flags;
2260
2261         if (pp) {
2262                 file->private_data = NULL;
2263                 spin_lock_irqsave(&all_pvt_lock, flags);
2264                 list_del(&pp->list);
2265                 spin_unlock_irqrestore(&all_pvt_lock, flags);
2266
2267 #if defined(CONFIG_INPUT_ADBHID) && defined(CONFIG_PMAC_BACKLIGHT)
2268                 if (pp->backlight_locker)
2269                         pmac_backlight_enable();
2270 #endif
2271
2272                 kfree(pp);
2273         }
2274         return 0;
2275 }
2276
2277 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2278 static void pmac_suspend_disable_irqs(void)
2279 {
2280         /* Call platform functions marked "on sleep" */
2281         pmac_pfunc_i2c_suspend();
2282         pmac_pfunc_base_suspend();
2283 }
2284
2285 static int powerbook_sleep(suspend_state_t state)
2286 {
2287         int error = 0;
2288
2289         /* Wait for completion of async requests */
2290         while (!batt_req.complete)
2291                 pmu_poll();
2292
2293         /* Giveup the lazy FPU & vec so we don't have to back them
2294          * up from the low level code
2295          */
2296         enable_kernel_fp();
2297
2298 #ifdef CONFIG_ALTIVEC
2299         if (cpu_has_feature(CPU_FTR_ALTIVEC))
2300                 enable_kernel_altivec();
2301 #endif /* CONFIG_ALTIVEC */
2302
2303         switch (pmu_kind) {
2304         case PMU_OHARE_BASED:
2305                 error = powerbook_sleep_3400();
2306                 break;
2307         case PMU_HEATHROW_BASED:
2308         case PMU_PADDINGTON_BASED:
2309                 error = powerbook_sleep_grackle();
2310                 break;
2311         case PMU_KEYLARGO_BASED:
2312                 error = powerbook_sleep_Core99();
2313                 break;
2314         default:
2315                 return -ENOSYS;
2316         }
2317
2318         if (error)
2319                 return error;
2320
2321         mdelay(100);
2322
2323         return 0;
2324 }
2325
2326 static void pmac_suspend_enable_irqs(void)
2327 {
2328         /* Force a poll of ADB interrupts */
2329         adb_int_pending = 1;
2330         via_pmu_interrupt(0, NULL);
2331
2332         mdelay(10);
2333
2334         /* Call platform functions marked "on wake" */
2335         pmac_pfunc_base_resume();
2336         pmac_pfunc_i2c_resume();
2337 }
2338
2339 static int pmu_sleep_valid(suspend_state_t state)
2340 {
2341         return state == PM_SUSPEND_MEM
2342                 && (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) >= 0);
2343 }
2344
2345 static const struct platform_suspend_ops pmu_pm_ops = {
2346         .enter = powerbook_sleep,
2347         .valid = pmu_sleep_valid,
2348 };
2349
2350 static int register_pmu_pm_ops(void)
2351 {
2352         if (pmu_kind == PMU_OHARE_BASED)
2353                 powerbook_sleep_init_3400();
2354         ppc_md.suspend_disable_irqs = pmac_suspend_disable_irqs;
2355         ppc_md.suspend_enable_irqs = pmac_suspend_enable_irqs;
2356         suspend_set_ops(&pmu_pm_ops);
2357
2358         return 0;
2359 }
2360
2361 device_initcall(register_pmu_pm_ops);
2362 #endif
2363
2364 static int pmu_ioctl(struct file *filp,
2365                      u_int cmd, u_long arg)
2366 {
2367         __u32 __user *argp = (__u32 __user *)arg;
2368         int error = -EINVAL;
2369
2370         switch (cmd) {
2371 #ifdef CONFIG_PPC_PMAC
2372         case PMU_IOC_SLEEP:
2373                 if (!capable(CAP_SYS_ADMIN))
2374                         return -EACCES;
2375                 return pm_suspend(PM_SUSPEND_MEM);
2376         case PMU_IOC_CAN_SLEEP:
2377                 if (pmac_call_feature(PMAC_FTR_SLEEP_STATE, NULL, 0, -1) < 0)
2378                         return put_user(0, argp);
2379                 else
2380                         return put_user(1, argp);
2381 #endif
2382
2383 #ifdef CONFIG_PMAC_BACKLIGHT_LEGACY
2384         /* Compatibility ioctl's for backlight */
2385         case PMU_IOC_GET_BACKLIGHT:
2386         {
2387                 int brightness;
2388
2389                 brightness = pmac_backlight_get_legacy_brightness();
2390                 if (brightness < 0)
2391                         return brightness;
2392                 else
2393                         return put_user(brightness, argp);
2394
2395         }
2396         case PMU_IOC_SET_BACKLIGHT:
2397         {
2398                 int brightness;
2399
2400                 error = get_user(brightness, argp);
2401                 if (error)
2402                         return error;
2403
2404                 return pmac_backlight_set_legacy_brightness(brightness);
2405         }
2406 #ifdef CONFIG_INPUT_ADBHID
2407         case PMU_IOC_GRAB_BACKLIGHT: {
2408                 struct pmu_private *pp = filp->private_data;
2409
2410                 if (pp->backlight_locker)
2411                         return 0;
2412
2413                 pp->backlight_locker = 1;
2414                 pmac_backlight_disable();
2415
2416                 return 0;
2417         }
2418 #endif /* CONFIG_INPUT_ADBHID */
2419 #endif /* CONFIG_PMAC_BACKLIGHT_LEGACY */
2420
2421         case PMU_IOC_GET_MODEL:
2422                 return put_user(pmu_kind, argp);
2423         case PMU_IOC_HAS_ADB:
2424                 return put_user(pmu_has_adb, argp);
2425         }
2426         return error;
2427 }
2428
2429 static long pmu_unlocked_ioctl(struct file *filp,
2430                                u_int cmd, u_long arg)
2431 {
2432         int ret;
2433
2434         mutex_lock(&pmu_info_proc_mutex);
2435         ret = pmu_ioctl(filp, cmd, arg);
2436         mutex_unlock(&pmu_info_proc_mutex);
2437
2438         return ret;
2439 }
2440
2441 #ifdef CONFIG_COMPAT
2442 #define PMU_IOC_GET_BACKLIGHT32 _IOR('B', 1, compat_size_t)
2443 #define PMU_IOC_SET_BACKLIGHT32 _IOW('B', 2, compat_size_t)
2444 #define PMU_IOC_GET_MODEL32     _IOR('B', 3, compat_size_t)
2445 #define PMU_IOC_HAS_ADB32       _IOR('B', 4, compat_size_t)
2446 #define PMU_IOC_CAN_SLEEP32     _IOR('B', 5, compat_size_t)
2447 #define PMU_IOC_GRAB_BACKLIGHT32 _IOR('B', 6, compat_size_t)
2448
2449 static long compat_pmu_ioctl (struct file *filp, u_int cmd, u_long arg)
2450 {
2451         switch (cmd) {
2452         case PMU_IOC_SLEEP:
2453                 break;
2454         case PMU_IOC_GET_BACKLIGHT32:
2455                 cmd = PMU_IOC_GET_BACKLIGHT;
2456                 break;
2457         case PMU_IOC_SET_BACKLIGHT32:
2458                 cmd = PMU_IOC_SET_BACKLIGHT;
2459                 break;
2460         case PMU_IOC_GET_MODEL32:
2461                 cmd = PMU_IOC_GET_MODEL;
2462                 break;
2463         case PMU_IOC_HAS_ADB32:
2464                 cmd = PMU_IOC_HAS_ADB;
2465                 break;
2466         case PMU_IOC_CAN_SLEEP32:
2467                 cmd = PMU_IOC_CAN_SLEEP;
2468                 break;
2469         case PMU_IOC_GRAB_BACKLIGHT32:
2470                 cmd = PMU_IOC_GRAB_BACKLIGHT;
2471                 break;
2472         default:
2473                 return -ENOIOCTLCMD;
2474         }
2475         return pmu_unlocked_ioctl(filp, cmd, (unsigned long)compat_ptr(arg));
2476 }
2477 #endif
2478
2479 static const struct file_operations pmu_device_fops = {
2480         .read           = pmu_read,
2481         .write          = pmu_write,
2482         .poll           = pmu_fpoll,
2483         .unlocked_ioctl = pmu_unlocked_ioctl,
2484 #ifdef CONFIG_COMPAT
2485         .compat_ioctl   = compat_pmu_ioctl,
2486 #endif
2487         .open           = pmu_open,
2488         .release        = pmu_release,
2489         .llseek         = noop_llseek,
2490 };
2491
2492 static struct miscdevice pmu_device = {
2493         PMU_MINOR, "pmu", &pmu_device_fops
2494 };
2495
2496 static int pmu_device_init(void)
2497 {
2498         if (pmu_state == uninitialized)
2499                 return 0;
2500         if (misc_register(&pmu_device) < 0)
2501                 printk(KERN_ERR "via-pmu: cannot register misc device.\n");
2502         return 0;
2503 }
2504 device_initcall(pmu_device_init);
2505
2506
2507 #ifdef DEBUG_SLEEP
2508 static inline void
2509 polled_handshake(void)
2510 {
2511         via2[B] &= ~TREQ; eieio();
2512         while ((via2[B] & TACK) != 0)
2513                 ;
2514         via2[B] |= TREQ; eieio();
2515         while ((via2[B] & TACK) == 0)
2516                 ;
2517 }
2518
2519 static inline void
2520 polled_send_byte(int x)
2521 {
2522         via1[ACR] |= SR_OUT | SR_EXT; eieio();
2523         via1[SR] = x; eieio();
2524         polled_handshake();
2525 }
2526
2527 static inline int
2528 polled_recv_byte(void)
2529 {
2530         int x;
2531
2532         via1[ACR] = (via1[ACR] & ~SR_OUT) | SR_EXT; eieio();
2533         x = via1[SR]; eieio();
2534         polled_handshake();
2535         x = via1[SR]; eieio();
2536         return x;
2537 }
2538
2539 int
2540 pmu_polled_request(struct adb_request *req)
2541 {
2542         unsigned long flags;
2543         int i, l, c;
2544
2545         req->complete = 1;
2546         c = req->data[0];
2547         l = pmu_data_len[c][0];
2548         if (l >= 0 && req->nbytes != l + 1)
2549                 return -EINVAL;
2550
2551         local_irq_save(flags);
2552         while (pmu_state != idle)
2553                 pmu_poll();
2554
2555         while ((via2[B] & TACK) == 0)
2556                 ;
2557         polled_send_byte(c);
2558         if (l < 0) {
2559                 l = req->nbytes - 1;
2560                 polled_send_byte(l);
2561         }
2562         for (i = 1; i <= l; ++i)
2563                 polled_send_byte(req->data[i]);
2564
2565         l = pmu_data_len[c][1];
2566         if (l < 0)
2567                 l = polled_recv_byte();
2568         for (i = 0; i < l; ++i)
2569                 req->reply[i + req->reply_len] = polled_recv_byte();
2570
2571         if (req->done)
2572                 (*req->done)(req);
2573
2574         local_irq_restore(flags);
2575         return 0;
2576 }
2577
2578 /* N.B. This doesn't work on the 3400 */
2579 void pmu_blink(int n)
2580 {
2581         struct adb_request req;
2582
2583         memset(&req, 0, sizeof(req));
2584
2585         for (; n > 0; --n) {
2586                 req.nbytes = 4;
2587                 req.done = NULL;
2588                 req.data[0] = 0xee;
2589                 req.data[1] = 4;
2590                 req.data[2] = 0;
2591                 req.data[3] = 1;
2592                 req.reply[0] = ADB_RET_OK;
2593                 req.reply_len = 1;
2594                 req.reply_expected = 0;
2595                 pmu_polled_request(&req);
2596                 mdelay(50);
2597                 req.nbytes = 4;
2598                 req.done = NULL;
2599                 req.data[0] = 0xee;
2600                 req.data[1] = 4;
2601                 req.data[2] = 0;
2602                 req.data[3] = 0;
2603                 req.reply[0] = ADB_RET_OK;
2604                 req.reply_len = 1;
2605                 req.reply_expected = 0;
2606                 pmu_polled_request(&req);
2607                 mdelay(50);
2608         }
2609         mdelay(50);
2610 }
2611 #endif /* DEBUG_SLEEP */
2612
2613 #if defined(CONFIG_SUSPEND) && defined(CONFIG_PPC32)
2614 int pmu_sys_suspended;
2615
2616 static int pmu_syscore_suspend(void)
2617 {
2618         /* Suspend PMU event interrupts */
2619         pmu_suspend();
2620         pmu_sys_suspended = 1;
2621
2622 #ifdef CONFIG_PMAC_BACKLIGHT
2623         /* Tell backlight code not to muck around with the chip anymore */
2624         pmu_backlight_set_sleep(1);
2625 #endif
2626
2627         return 0;
2628 }
2629
2630 static void pmu_syscore_resume(void)
2631 {
2632         struct adb_request req;
2633
2634         if (!pmu_sys_suspended)
2635                 return;
2636
2637         /* Tell PMU we are ready */
2638         pmu_request(&req, NULL, 2, PMU_SYSTEM_READY, 2);
2639         pmu_wait_complete(&req);
2640
2641 #ifdef CONFIG_PMAC_BACKLIGHT
2642         /* Tell backlight code it can use the chip again */
2643         pmu_backlight_set_sleep(0);
2644 #endif
2645         /* Resume PMU event interrupts */
2646         pmu_resume();
2647         pmu_sys_suspended = 0;
2648 }
2649
2650 static struct syscore_ops pmu_syscore_ops = {
2651         .suspend = pmu_syscore_suspend,
2652         .resume = pmu_syscore_resume,
2653 };
2654
2655 static int pmu_syscore_register(void)
2656 {
2657         register_syscore_ops(&pmu_syscore_ops);
2658
2659         return 0;
2660 }
2661 subsys_initcall(pmu_syscore_register);
2662 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2663
2664 EXPORT_SYMBOL(pmu_request);
2665 EXPORT_SYMBOL(pmu_queue_request);
2666 EXPORT_SYMBOL(pmu_poll);
2667 EXPORT_SYMBOL(pmu_poll_adb);
2668 EXPORT_SYMBOL(pmu_wait_complete);
2669 EXPORT_SYMBOL(pmu_suspend);
2670 EXPORT_SYMBOL(pmu_resume);
2671 EXPORT_SYMBOL(pmu_unlock);
2672 #if defined(CONFIG_PPC32)
2673 EXPORT_SYMBOL(pmu_enable_irled);
2674 EXPORT_SYMBOL(pmu_battery_count);
2675 EXPORT_SYMBOL(pmu_batteries);
2676 EXPORT_SYMBOL(pmu_power_flags);
2677 #endif /* CONFIG_SUSPEND && CONFIG_PPC32 */
2678