drivers/macintosh/via-pmu.c

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