drivers/macintosh/via-pmu.c

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